├── .github └── FUNDING.yml ├── .gitignore ├── .idea └── .idea.GpuTrail │ └── .idea │ ├── .gitignore │ ├── encodings.xml │ ├── indexLayout.xml │ └── vcs.xml ├── .vsconfig ├── Assets ├── Example.meta ├── Example │ ├── EmitterSphere.meta │ ├── EmitterSphere │ │ ├── Sphere.physicMaterial │ │ ├── Sphere.physicMaterial.meta │ │ ├── Sphere.prefab │ │ └── Sphere.prefab.meta │ ├── GpuTrailCullingAndLodExample.unity │ ├── GpuTrailCullingAndLodExample.unity.meta │ ├── GpuTrailExample.meta │ ├── GpuTrailExample.unity │ ├── GpuTrailExample.unity.meta │ ├── GpuTrailExample │ │ ├── GpuTrailExample.cs │ │ ├── GpuTrailExample.cs.meta │ │ ├── GpuTrailExampleParticle.compute │ │ ├── GpuTrailExampleParticle.compute.meta │ │ ├── GpuTrailExampleParticle.cs │ │ ├── GpuTrailExampleParticle.cs.meta │ │ ├── GpuTrail_Blue.mat │ │ ├── GpuTrail_Blue.mat.meta │ │ ├── GpuTrail_Green.mat │ │ ├── GpuTrail_Green.mat.meta │ │ ├── GpuTrail_Red.mat │ │ └── GpuTrail_Red.mat.meta │ ├── GpuTrailGameObjectExample.meta │ ├── GpuTrailGameObjectExample.unity │ ├── GpuTrailGameObjectExample.unity.meta │ ├── GpuTrailGameObjectExample │ │ ├── AutoRotate.cs │ │ ├── AutoRotate.cs.meta │ │ ├── GenerateSphere.cs │ │ └── GenerateSphere.cs.meta │ ├── SmoothExample.meta │ ├── SmoothExample.unity │ ├── SmoothExample.unity.meta │ ├── SmoothExample │ │ ├── GpuTrail_Opaque.mat │ │ ├── GpuTrail_Opaque.mat.meta │ │ ├── SmoothExample.cs │ │ └── SmoothExample.cs.meta │ ├── SplineExample.meta │ ├── SplineExample.unity │ ├── SplineExample.unity.meta │ └── SplineExample │ │ ├── SplineExample.cs │ │ └── SplineExample.cs.meta ├── URP.meta └── URP │ ├── Universal Render Pipeline Asset.asset │ ├── Universal Render Pipeline Asset.asset.meta │ ├── Universal Render Pipeline Asset_Renderer.asset │ ├── Universal Render Pipeline Asset_Renderer.asset.meta │ ├── UniversalRenderPipelineGlobalSettings.asset │ └── UniversalRenderPipelineGlobalSettings.asset.meta ├── Documents ├── culling.webp ├── gputrail.webp └── lod.webp ├── LICENSE ├── Packages ├── GpuTrail │ ├── GpuTrail.asmdef │ ├── GpuTrail.asmdef.meta │ ├── Materials.meta │ ├── Materials │ │ ├── GpuTrail.mat │ │ └── GpuTrail.mat.meta │ ├── Scripts.meta │ ├── Scripts │ │ ├── ComputeShaderUtility.cs │ │ ├── ComputeShaderUtility.cs.meta │ │ ├── GameObjectUtility.meta │ │ ├── GameObjectUtility │ │ │ ├── GpuTrailEmitter.cs │ │ │ ├── GpuTrailEmitter.cs.meta │ │ │ ├── GpuTrailEmitterGroup.cs │ │ │ └── GpuTrailEmitterGroup.cs.meta │ │ ├── GpuTrail.cs │ │ ├── GpuTrail.cs.meta │ │ ├── GpuTrailAppendNode.cs │ │ ├── GpuTrailAppendNode.cs.meta │ │ ├── GpuTrailIndexDispatcher.cs │ │ ├── GpuTrailIndexDispatcher.cs.meta │ │ ├── GpuTrailRenderer.cs │ │ ├── GpuTrailRenderer.cs.meta │ │ ├── GpuTrailRendererCalcLod.cs │ │ ├── GpuTrailRendererCalcLod.cs.meta │ │ ├── GpuTrailRendererCulling.cs │ │ ├── GpuTrailRendererCulling.cs.meta │ │ ├── GpuTrailRendererLod.cs │ │ ├── GpuTrailRendererLod.cs.meta │ │ ├── IGpuTrailAppendNode.cs │ │ ├── IGpuTrailAppendNode.cs.meta │ │ ├── Node.cs │ │ ├── Node.cs.meta │ │ ├── Trail.cs │ │ ├── Trail.cs.meta │ │ ├── Utility.meta │ │ ├── Utility │ │ │ ├── GraphicsBufferUtility.cs │ │ │ ├── GraphicsBufferUtility.cs.meta │ │ │ ├── Spline.cs │ │ │ └── Spline.cs.meta │ │ ├── Vertex.cs │ │ └── Vertex.cs.meta │ ├── Shaders.meta │ ├── Shaders │ │ ├── GPUTrailVertex.hlsl │ │ ├── GPUTrailVertex.hlsl.meta │ │ ├── GpuTrail.shader │ │ ├── GpuTrail.shader.meta │ │ ├── GpuTrailAppendNode.compute │ │ ├── GpuTrailAppendNode.compute.meta │ │ ├── GpuTrailCSInclude.hlsl │ │ ├── GpuTrailCSInclude.hlsl.meta │ │ ├── GpuTrailCalcLod.compute │ │ ├── GpuTrailCalcLod.compute.meta │ │ ├── GpuTrailCulling.compute │ │ ├── GpuTrailCulling.compute.meta │ │ ├── GpuTrailIndexDispatcher.compute │ │ ├── GpuTrailIndexDispatcher.compute.meta │ │ ├── GpuTrailIndexInclude.hlsl │ │ ├── GpuTrailIndexInclude.hlsl.meta │ │ ├── GpuTrailShaderInclude.hlsl │ │ ├── GpuTrailShaderInclude.hlsl.meta │ │ ├── GpuTrailUpdateVertex.compute │ │ └── GpuTrailUpdateVertex.compute.meta │ ├── package.json │ └── package.json.meta ├── manifest.json └── packages-lock.json ├── ProjectSettings ├── AudioManager.asset ├── ClusterInputManager.asset ├── DynamicsManager.asset ├── EditorBuildSettings.asset ├── EditorSettings.asset ├── GraphicsSettings.asset ├── InputManager.asset ├── MemorySettings.asset ├── NavMeshAreas.asset ├── NavMeshLayers.asset ├── NetworkManager.asset ├── PackageManagerSettings.asset ├── Physics2DSettings.asset ├── PresetManager.asset ├── ProjectSettings.asset ├── ProjectVersion.txt ├── QualitySettings.asset ├── SceneTemplateSettings.json ├── ShaderGraphSettings.asset ├── TagManager.asset ├── TimeManager.asset ├── TimelineSettings.asset ├── URPProjectSettings.asset ├── UnityConnectSettings.asset ├── VFXManager.asset └── VersionControlSettings.asset └── README.md /.github/FUNDING.yml: -------------------------------------------------------------------------------- 1 | # These are supported funding model platforms 2 | 3 | github: fuqunaga 4 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # This .gitignore file should be placed at the root of your Unity project directory 2 | # 3 | # Get latest from https://github.com/github/gitignore/blob/master/Unity.gitignore 4 | # 5 | /[Ll]ibrary/ 6 | /[Tt]emp/ 7 | /[Oo]bj/ 8 | /[Bb]uild/ 9 | /[Bb]uilds/ 10 | /[Ll]ogs/ 11 | /[Uu]ser[Ss]ettings/ 12 | 13 | # MemoryCaptures can get excessive in size. 14 | # They also could contain extremely sensitive data 15 | /[Mm]emoryCaptures/ 16 | 17 | # Asset meta data should only be ignored when the corresponding asset is also ignored 18 | !/[Aa]ssets/**/*.meta 19 | 20 | # Uncomment this line if you wish to ignore the asset store tools plugin 21 | # /[Aa]ssets/AssetStoreTools* 22 | 23 | # Autogenerated Jetbrains Rider plugin 24 | /[Aa]ssets/Plugins/Editor/JetBrains* 25 | 26 | # Visual Studio cache directory 27 | .vs/ 28 | 29 | # Gradle cache directory 30 | .gradle/ 31 | 32 | # Autogenerated VS/MD/Consulo solution and project files 33 | ExportedObj/ 34 | .consulo/ 35 | *.csproj 36 | *.unityproj 37 | *.sln 38 | *.suo 39 | *.tmp 40 | *.user 41 | *.userprefs 42 | *.pidb 43 | *.booproj 44 | *.svd 45 | *.pdb 46 | *.mdb 47 | *.opendb 48 | *.VC.db 49 | 50 | # Unity3D generated meta files 51 | *.pidb.meta 52 | *.pdb.meta 53 | *.mdb.meta 54 | 55 | # Unity3D generated file on crash reports 56 | sysinfo.txt 57 | 58 | # Builds 59 | *.apk 60 | *.aab 61 | *.unitypackage 62 | 63 | # Crashlytics generated file 64 | crashlytics-build.properties 65 | 66 | # Packed Addressables 67 | /[Aa]ssets/[Aa]ddressable[Aa]ssets[Dd]ata/*/*.bin* 68 | 69 | # Temporary auto-generated Android Assets 70 | /[Aa]ssets/[Ss]treamingAssets/aa.meta 71 | /[Aa]ssets/[Ss]treamingAssets/aa/* -------------------------------------------------------------------------------- /.idea/.idea.GpuTrail/.idea/.gitignore: -------------------------------------------------------------------------------- 1 | # Default ignored files 2 | /shelf/ 3 | /workspace.xml 4 | # Rider ignored files 5 | /projectSettingsUpdater.xml 6 | /modules.xml 7 | /.idea.GpuTrail.iml 8 | /contentModel.xml 9 | # Editor-based HTTP Client requests 10 | /httpRequests/ 11 | # Datasource local storage ignored files 12 | /dataSources/ 13 | /dataSources.local.xml 14 | -------------------------------------------------------------------------------- /.idea/.idea.GpuTrail/.idea/encodings.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | -------------------------------------------------------------------------------- /.idea/.idea.GpuTrail/.idea/indexLayout.xml: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /.idea/.idea.GpuTrail/.idea/vcs.xml: 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-------------------------------------------------------------------------------- /Assets/Example/GpuTrailExample.unity.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 34434622149c0594f86fe9841b125833 3 | DefaultImporter: 4 | userData: 5 | -------------------------------------------------------------------------------- /Assets/Example/GpuTrailExample/GpuTrailExample.cs: -------------------------------------------------------------------------------- 1 | namespace GpuTrailSystem.Example 2 | { 3 | public class GpuTrailExample : GpuTrailAppendNode 4 | { 5 | public GpuTrailExampleParticle particle; 6 | public bool particleGizmosEnable; 7 | 8 | protected void Start() 9 | { 10 | particle.Init(); 11 | gpuTrail.trailNum = particle.particleNum; 12 | } 13 | protected override void OnDestroy() 14 | { 15 | base.OnDestroy(); 16 | particle.ReleaseBuffer(); 17 | } 18 | 19 | 20 | protected override int UpdateInputBuffer() 21 | { 22 | particle.UpdateInputBuffer(InputBufferPos); 23 | return 1; 24 | } 25 | 26 | 27 | public override void OnDrawGizmosSelected() 28 | { 29 | base.OnDrawGizmosSelected(); 30 | 31 | if (particleGizmosEnable) 32 | { 33 | particle.DrawGizmos(); 34 | } 35 | } 36 | } 37 | 38 | } -------------------------------------------------------------------------------- /Assets/Example/GpuTrailExample/GpuTrailExample.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 665b0a84258e7534787071e45a68c201 3 | timeCreated: 1485429859 4 | licenseType: Pro 5 | MonoImporter: 6 | serializedVersion: 2 7 | defaultReferences: 8 | - _cs: {fileID: 7200000, guid: 5e0b0e8f0f658774f9dca7b0695eacd4, type: 3} 9 | - _material: {fileID: 2100000, guid: c1c458d860a40bc4f836b8625223124f, type: 2} 10 | executionOrder: 0 11 | icon: {instanceID: 0} 12 | userData: 13 | assetBundleName: 14 | assetBundleVariant: 15 | -------------------------------------------------------------------------------- /Assets/Example/GpuTrailExample/GpuTrailExampleParticle.compute: -------------------------------------------------------------------------------- 1 | #pragma kernel CSMain NUM_THREAD_X=32 2 | 3 | struct Particle 4 | { 5 | float3 velocity; 6 | float3 pos; 7 | }; 8 | 9 | float _Time; 10 | float _ForceRate; 11 | float _Damping; 12 | float _Gravity; 13 | float3 _Bounds; 14 | RWStructuredBuffer _ParticleBuffer; 15 | RWStructuredBuffer _InputBuffer_Pos; 16 | 17 | float rand(float2 co){ 18 | return frac(sin(dot(co.xy ,float2(12.9898,78.233))) * 43758.5453); 19 | } 20 | 21 | [numthreads(NUM_THREAD_X,1,1)] 22 | void CSMain (uint3 id : SV_DispatchThreadID) 23 | { 24 | uint idx = id.x; 25 | 26 | Particle particle = _ParticleBuffer[idx]; 27 | float3 force = float3 ( 28 | rand(float2(idx, _Time )) - 0.5, 29 | rand(float2(idx, _Time*2)) - 0.5, 30 | rand(float2(idx, _Time*3)) - 0.5 31 | ); 32 | 33 | float3 velocity = particle.velocity * _Damping + force * _ForceRate; 34 | 35 | velocity.y -= _Gravity; 36 | 37 | float3 pos = particle.pos + velocity; 38 | 39 | float3 overPlus = pos - _Bounds; 40 | if ( overPlus.x > 0) { pos.x = _Bounds.x; velocity.x *= -0.95;} 41 | if ( overPlus.y > 0) { pos.y = _Bounds.y; velocity.y *= -0.95;} 42 | if ( overPlus.z > 0) { pos.z = _Bounds.z; velocity.z *= -0.95;} 43 | 44 | float3 overMinus = pos + _Bounds; 45 | if ( overMinus.x < 0){ pos.x = -_Bounds.x; velocity.x *= -0.95;} 46 | if ( overMinus.y < 0){ pos.y = -_Bounds.y; velocity.y *= -0.95;} 47 | if ( overMinus.z < 0){ pos.z = -_Bounds.z; velocity.z *= -0.95;} 48 | 49 | particle.pos = pos; 50 | particle.velocity = velocity; 51 | _ParticleBuffer[idx] = particle; 52 | 53 | _InputBuffer_Pos[idx] = particle.pos; 54 | } 55 | -------------------------------------------------------------------------------- /Assets/Example/GpuTrailExample/GpuTrailExampleParticle.compute.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 16daaa733f6a1194394beb0d2f0d6fb9 3 | timeCreated: 1484821669 4 | licenseType: Pro 5 | ComputeShaderImporter: 6 | currentAPIMask: 4 7 | userData: 8 | assetBundleName: 9 | assetBundleVariant: 10 | -------------------------------------------------------------------------------- /Assets/Example/GpuTrailExample/GpuTrailExampleParticle.cs: -------------------------------------------------------------------------------- 1 | using System.Runtime.InteropServices; 2 | using UnityEngine; 3 | 4 | namespace GpuTrailSystem.Example 5 | { 6 | 7 | [System.Serializable] 8 | public class GpuTrailExampleParticle 9 | { 10 | struct Particle 11 | { 12 | public Vector3 velocity; 13 | public Vector3 pos; 14 | } 15 | 16 | GraphicsBuffer particleBuffer; 17 | 18 | 19 | public ComputeShader particleCS; 20 | public int particleNum = 1000; 21 | public float startSpeed = 1f; 22 | public float forceRate = 0.01f; 23 | public float damping = 0.99f; 24 | public float gravity = 0.01f; 25 | public Vector3 bounds = Vector3.one * 10f; 26 | 27 | public void Init() 28 | { 29 | particleBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, particleNum, Marshal.SizeOf()); 30 | 31 | var particles = new Particle[particleBuffer.count]; 32 | for (var i = 0; i < particles.Length; ++i) 33 | { 34 | particles[i] = new Particle 35 | { 36 | pos = Random.insideUnitSphere * bounds.y * 0.1f, 37 | velocity = Vector3.Scale(Random.insideUnitSphere, Vector3.up * startSpeed) 38 | }; 39 | } 40 | 41 | particleBuffer.SetData(particles); 42 | } 43 | 44 | public void UpdateInputBuffer(GraphicsBuffer inputBuffer) 45 | { 46 | particleCS.SetFloat("_Time", Time.time); 47 | particleCS.SetFloat("_ForceRate", forceRate); 48 | particleCS.SetFloat("_Damping", damping); 49 | particleCS.SetFloat("_Gravity", gravity); 50 | particleCS.SetFloats("_Bounds", bounds.x, bounds.y, bounds.z); 51 | 52 | 53 | var kernel = particleCS.FindKernel("CSMain"); 54 | particleCS.SetBuffer(kernel, "_ParticleBuffer", particleBuffer); 55 | particleCS.SetBuffer(kernel, "_InputBuffer_Pos", inputBuffer); 56 | 57 | ComputeShaderUtility.Dispatch(particleCS, kernel, particleBuffer.count); 58 | } 59 | 60 | public void ReleaseBuffer() 61 | { 62 | if (particleBuffer != null) particleBuffer.Release(); 63 | } 64 | 65 | 66 | Particle[] particles; 67 | public void DrawGizmos() 68 | { 69 | if (particles == null) particles = new Particle[particleBuffer.count]; 70 | 71 | particleBuffer.GetData(particles); 72 | 73 | const float radius = 0.1f; 74 | Gizmos.color = Color.red; 75 | for(var i=0; i().velocity = Random.insideUnitSphere * 10f; 25 | } 26 | } 27 | 28 | } 29 | 30 | void Update() 31 | { 32 | if (Input.GetMouseButton(0)) 33 | { 34 | var pos = Camera.main.transform.position; 35 | var foward = Camera.main.transform.forward; 36 | 37 | var go = Instantiate(prefab, pos + foward * 2f, Quaternion.identity) as GameObject; 38 | if (go) 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_StartColor: {r: 0.7058824, g: 0.115667395, b: 0.0509804, a: 1} 36 | m_BuildTextureStacks: [] 37 | -------------------------------------------------------------------------------- /Assets/Example/SmoothExample/GpuTrail_Opaque.mat.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: bb64f856f96e3ca4395c7b1ab1b4f542 3 | NativeFormatImporter: 4 | externalObjects: {} 5 | mainObjectFileID: 2100000 6 | userData: 7 | assetBundleName: 8 | assetBundleVariant: 9 | -------------------------------------------------------------------------------- /Assets/Example/SmoothExample/SmoothExample.cs: -------------------------------------------------------------------------------- 1 | using System.Collections; 2 | using System.Collections.Generic; 3 | using UnityEngine; 4 | using UnityEditor; 5 | 6 | namespace GpuTrailSystem.Example 7 | { 8 | 9 | public class SmoothExample : MonoBehaviour 10 | { 11 | public GameObject sphere; 12 | public List path = new List(); 13 | 14 | 15 | void Start() 16 | { 17 | var go = Instantiate(sphere); 18 | 19 | StartCoroutine(MoveSequence(go)); 20 | } 21 | 22 | IEnumerator MoveSequence(GameObject go) 23 | { 24 | foreach (var trans in path) 25 | { 26 | go.transform.position = trans.position; 27 | yield return null; 28 | } 29 | 30 | Destroy(go); 31 | } 32 | 33 | 34 | static GUIStyle style; 35 | void OnDrawGizmos() 36 | { 37 | if (style == null) 38 | { 39 | style = GUI.skin.label; 40 | style.normal.textColor = new Color(0.3f, 0.3f, 0.3f); 41 | } 42 | 43 | for (var i = 0; i < path.Count; ++i) 44 | { 45 | var point = path[i]; 46 | Handles.Label(point.position, i.ToString(), style); 47 | } 48 | } 49 | } 50 | } -------------------------------------------------------------------------------- /Assets/Example/SmoothExample/SmoothExample.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: ae698f6d972f8664e8aa41c67a5eabb2 3 | 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-------------------------------------------------------------------------------- /Assets/Example/SplineExample/SplineExample.cs: -------------------------------------------------------------------------------- 1 | using System.Collections.Generic; 2 | using UnityEngine; 3 | 4 | 5 | namespace GpuTrailSystem 6 | { 7 | 8 | public class SplineExample : MonoBehaviour 9 | { 10 | public int step = 10; 11 | public List _transforms = new List(); 12 | 13 | 14 | public void OnDrawGizmos() 15 | { 16 | var stepInv = 1f / step; 17 | for (var i = 2; i < _transforms.Count; ++i) 18 | { 19 | for (var s = 0; s < step; ++s) 20 | { 21 | var prev = _transforms[i - 2].position; 22 | var start = _transforms[i - 1].position; 23 | var end = _transforms[i].position; 24 | 25 | var pos = Spline.CatmullRom(stepInv * s, prev, start, end); 26 | var posNext = Spline.CatmullRom(stepInv * (s + 1), prev, start, end); 27 | 28 | 29 | Gizmos.DrawLine(pos, posNext); 30 | } 31 | } 32 | } 33 | } 34 | } 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-------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: cbdd51b84a6e9b54590944fa8ca5ba48 3 | NativeFormatImporter: 4 | externalObjects: {} 5 | mainObjectFileID: 11400000 6 | userData: 7 | assetBundleName: 8 | assetBundleVariant: 9 | -------------------------------------------------------------------------------- /Documents/culling.webp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/fuqunaga/GpuTrail/057f559a67c049134b20d2f43dd4c988f24ba6eb/Documents/culling.webp -------------------------------------------------------------------------------- /Documents/gputrail.webp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/fuqunaga/GpuTrail/057f559a67c049134b20d2f43dd4c988f24ba6eb/Documents/gputrail.webp -------------------------------------------------------------------------------- /Documents/lod.webp: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/fuqunaga/GpuTrail/057f559a67c049134b20d2f43dd4c988f24ba6eb/Documents/lod.webp -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | MIT License 2 | 3 | Copyright (c) 2019 fuqunaga 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /Packages/GpuTrail/GpuTrail.asmdef: -------------------------------------------------------------------------------- 1 | { 2 | "name": "GpuTrail" 3 | } 4 | -------------------------------------------------------------------------------- /Packages/GpuTrail/GpuTrail.asmdef.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 0dd3ac56fd3bb1245aa29c2ccf8e1a09 3 | AssemblyDefinitionImporter: 4 | externalObjects: {} 5 | userData: 6 | assetBundleName: 7 | assetBundleVariant: 8 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Materials.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 25f5c42cf16b07d40abd21aecc65a496 3 | folderAsset: yes 4 | timeCreated: 1484910935 5 | licenseType: Pro 6 | DefaultImporter: 7 | userData: 8 | assetBundleName: 9 | assetBundleVariant: 10 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Materials/GpuTrail.mat: -------------------------------------------------------------------------------- 1 | %YAML 1.1 2 | %TAG !u! tag:unity3d.com,2011: 3 | --- !u!21 &2100000 4 | Material: 5 | serializedVersion: 6 6 | m_ObjectHideFlags: 0 7 | m_CorrespondingSourceObject: {fileID: 0} 8 | m_PrefabInstance: {fileID: 0} 9 | m_PrefabAsset: {fileID: 0} 10 | m_Name: GpuTrail 11 | m_Shader: {fileID: 4800000, guid: 753c44b9fec068b40a762cfa65734feb, type: 3} 12 | m_ShaderKeywords: GPUTRAIL_TRAIL_INDEX_ON 13 | m_LightmapFlags: 5 14 | m_EnableInstancingVariants: 0 15 | m_DoubleSidedGI: 0 16 | m_CustomRenderQueue: -1 17 | stringTagMap: {} 18 | disabledShaderPasses: [] 19 | m_SavedProperties: 20 | serializedVersion: 3 21 | m_TexEnvs: 22 | - _MainTex: 23 | m_Texture: {fileID: 0} 24 | m_Scale: {x: 1, y: 1} 25 | m_Offset: {x: 0, y: 0} 26 | - _Sprite: 27 | m_Texture: {fileID: 0} 28 | m_Scale: {x: 1, y: 1} 29 | m_Offset: {x: 0, y: 0} 30 | m_Floats: 31 | - _Life: 1000 32 | m_Colors: 33 | - _Color: {r: 1, g: 1, b: 1, a: 1} 34 | - _EndColor: {r: 0.19717601, g: 0.39200002, b: 0.29127988, a: 0} 35 | - _StartColor: {r: 0.7058824, g: 0.25736675, b: 0.0509804, a: 1} 36 | m_BuildTextureStacks: [] 37 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Materials/GpuTrail.mat.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 5f6e1cac686a9714e9048568cfe33abf 3 | NativeFormatImporter: 4 | externalObjects: {} 5 | mainObjectFileID: 0 6 | userData: 7 | assetBundleName: 8 | assetBundleVariant: 9 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 12f2d95a2b827314f98b1ee94c59dc24 3 | folderAsset: yes 4 | timeCreated: 1484908277 5 | licenseType: Pro 6 | DefaultImporter: 7 | userData: 8 | assetBundleName: 9 | assetBundleVariant: 10 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/ComputeShaderUtility.cs: -------------------------------------------------------------------------------- 1 | using UnityEngine; 2 | 3 | 4 | namespace GpuTrailSystem 5 | { 6 | 7 | public static class ComputeShaderUtility 8 | { 9 | public static void Dispatch(ComputeShader cs, int kernel, int numThread) 10 | { 11 | cs.GetKernelThreadGroupSizes(kernel, out var x, out _, out _); 12 | 13 | cs.Dispatch(kernel, Mathf.CeilToInt((float)numThread / x), 1, 1); 14 | } 15 | 16 | } 17 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/ComputeShaderUtility.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 9e3bd41e2d092b142a76560f257026d8 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GameObjectUtility.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 8a0d26c141c3d5d4584739a9d20bad54 3 | folderAsset: yes 4 | DefaultImporter: 5 | externalObjects: {} 6 | userData: 7 | assetBundleName: 8 | assetBundleVariant: 9 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GameObjectUtility/GpuTrailEmitter.cs: -------------------------------------------------------------------------------- 1 | using UnityEngine; 2 | 3 | namespace GpuTrailSystem 4 | { 5 | 6 | public class GpuTrailEmitter : MonoBehaviour 7 | { 8 | public string groupName; 9 | 10 | void Start() 11 | { 12 | GpuTrailEmitterGroup.RegisterEmitter(groupName, this); 13 | } 14 | } 15 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GameObjectUtility/GpuTrailEmitter.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: fd5e20c5d4b58ae4996d2d0c4f8b8627 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GameObjectUtility/GpuTrailEmitterGroup.cs: -------------------------------------------------------------------------------- 1 | using System.Collections.Generic; 2 | using System.Linq; 3 | using Unity.Collections; 4 | using UnityEngine; 5 | 6 | namespace GpuTrailSystem 7 | { 8 | public class GpuTrailEmitterGroup : GpuTrailAppendNode 9 | { 10 | #region Static 11 | 12 | static readonly Dictionary GroupDic = new(); 13 | 14 | static void RegisterGroup(GpuTrailEmitterGroup group) 15 | { 16 | GroupDic[group.groupName] = group; 17 | } 18 | 19 | public static void RegisterEmitter(string groupName, GpuTrailEmitter emitter) 20 | { 21 | if (GroupDic.TryGetValue(groupName, out var trailGroup)) 22 | { 23 | trailGroup.Register(emitter); 24 | } 25 | } 26 | 27 | #endregion 28 | 29 | 30 | public string groupName; 31 | 32 | readonly List _emitters = new(); 33 | readonly List<(Vector3, Vector3)> _emitterPosLogs = new(); 34 | NativeArray _posArray; 35 | 36 | void Start() 37 | { 38 | RegisterGroup(this); 39 | } 40 | 41 | 42 | protected override void OnDestroy() 43 | { 44 | base.OnDestroy(); 45 | _posArray.Dispose(); 46 | } 47 | 48 | 49 | void CheckBuffers() 50 | { 51 | if (InputBufferPos.count != BufferSize) 52 | { 53 | InitBuffers(); 54 | } 55 | 56 | if (!_posArray.IsCreated || _posArray.Length != InputBufferPos.count) 57 | { 58 | if (_posArray.IsCreated) _posArray.Dispose(); 59 | _posArray = new NativeArray(InputBufferPos.count, Allocator.Persistent); 60 | } 61 | } 62 | 63 | protected override int UpdateInputBuffer() 64 | { 65 | #if UNITY_EDITOR 66 | if ( Mathf.Max(30f, Application.targetFrameRate) * inputCountMax > gpuTrail.life * gpuTrail.inputPerSec) 67 | { 68 | Debug.LogWarning("GpuTrail nodeBuffer will overflow. Please set gpuTrail.inputPerSec > inputCount * Application.targetFrameFate"); 69 | } 70 | #endif 71 | 72 | CheckBuffers(); 73 | 74 | while (_emitterPosLogs.Count < _emitters.Count) 75 | { 76 | _emitterPosLogs.Add((default(Vector3), default(Vector3))); 77 | } 78 | 79 | 80 | var trailNum = gpuTrail.trailNum; 81 | 82 | for (var i = 0; i < _emitters.Count; ++i) 83 | { 84 | var inputIdx = 0; 85 | var emitter = _emitters[i]; 86 | if (emitter != null && emitter.enabled) 87 | { 88 | var pos = emitter.transform.position; 89 | 90 | var (prev0, prev1) = _emitterPosLogs[i]; 91 | var hasLog = prev0 != default && prev1 != default; 92 | if (hasLog) 93 | { 94 | for (; inputIdx < inputCountMax; ++inputIdx) 95 | { 96 | var t = (float)(inputIdx + 1) / inputCountMax; //0:exclude 1:include 97 | _posArray[trailNum * inputIdx + i] = Spline.CatmullRom(t, prev1, prev0, pos); 98 | } 99 | } 100 | else 101 | { 102 | _posArray[i] = pos; 103 | inputIdx++; 104 | } 105 | 106 | prev1 = prev0; 107 | prev0 = pos; 108 | _emitterPosLogs[i] = (prev0, prev1); 109 | } 110 | 111 | // fill ignore point 112 | for (; inputIdx < inputCountMax; ++inputIdx) 113 | { 114 | _posArray[trailNum * inputIdx + i] = default; 115 | } 116 | } 117 | 118 | 119 | InputBufferPos.SetData(_posArray); 120 | 121 | return _emitters.Any() ? inputCountMax : 0; 122 | } 123 | 124 | 125 | public void Register(GpuTrailEmitter emitter) 126 | { 127 | _emitters.Add(emitter); 128 | } 129 | } 130 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GameObjectUtility/GpuTrailEmitterGroup.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 14aa68c0537049340a0afe82786a7aa9 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: 7 | - appendNodeCS: {fileID: 7200000, guid: d1a2d7e60a9bbd54e8a06cea0893efff, type: 3} 8 | executionOrder: 0 9 | icon: {instanceID: 0} 10 | userData: 11 | assetBundleName: 12 | assetBundleVariant: 13 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrail.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | using System.Runtime.InteropServices; 4 | using UnityEngine; 5 | 6 | 7 | namespace GpuTrailSystem 8 | { 9 | /// 10 | /// C# side corresponding to GpuTrailCSInclude.cginc 11 | /// 12 | [Serializable] 13 | public class GpuTrail : IDisposable 14 | { 15 | public static class CsParam 16 | { 17 | public static readonly int TrailNum = Shader.PropertyToID("_TrailNum"); 18 | public static readonly int NodeNumPerTrail = Shader.PropertyToID("_NodeNumPerTrail"); 19 | public static readonly int Time = Shader.PropertyToID("_Time"); 20 | public static readonly int Life = Shader.PropertyToID("_Life"); 21 | public static readonly int MinNodeDistance = Shader.PropertyToID("_MinNodeDistance"); 22 | 23 | public static readonly int TrailBuffer = Shader.PropertyToID("_TrailBuffer"); 24 | public static readonly int NodeBuffer = Shader.PropertyToID("_NodeBuffer"); 25 | } 26 | 27 | 28 | public int trailNum = 1; 29 | public float life = 10f; 30 | public float inputPerSec = 60f; 31 | public float minNodeDistance = 0.1f; 32 | 33 | 34 | public int NodeNumPerTrail { get; protected set; } 35 | public int NodeNumTotal => trailNum * NodeNumPerTrail; 36 | 37 | public GraphicsBuffer TrailBuffer { get; protected set; } 38 | 39 | public GraphicsBuffer NodeBuffer { get; protected set; } 40 | 41 | public bool IsInitialized => TrailBuffer != null; 42 | 43 | 44 | public void Init() 45 | { 46 | NodeNumPerTrail = Mathf.CeilToInt(life * inputPerSec); 47 | if (inputPerSec < Application.targetFrameRate) 48 | { 49 | Debug.LogWarning($"inputPerSec({inputPerSec}) < targetFps({Application.targetFrameRate}): Trai adds a node every frame, so running at TargetFrameRate will overflow the buffer."); 50 | } 51 | 52 | InitBuffer(); 53 | } 54 | 55 | 56 | public void Dispose() 57 | { 58 | ReleaseBuffer(); 59 | } 60 | 61 | 62 | 63 | protected virtual void InitBuffer() 64 | { 65 | TrailBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, trailNum, Marshal.SizeOf()); 66 | TrailBuffer.Fill(default(Trail)); 67 | 68 | NodeBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, NodeNumTotal, Marshal.SizeOf()); 69 | NodeBuffer.Fill(default(Node)); 70 | } 71 | 72 | 73 | 74 | protected virtual void ReleaseBuffer() 75 | { 76 | TrailBuffer?.Release(); 77 | NodeBuffer?.Release(); 78 | } 79 | 80 | 81 | public void SetCSParams(ComputeShader cs, int kernel) 82 | { 83 | cs.SetInt(CsParam.TrailNum, trailNum); 84 | cs.SetInt(CsParam.NodeNumPerTrail, NodeNumPerTrail); 85 | cs.SetFloat(CsParam.MinNodeDistance, minNodeDistance); 86 | cs.SetFloat(CsParam.Time, Time.time); 87 | cs.SetFloat(CsParam.Life, life); 88 | 89 | cs.SetBuffer(kernel, CsParam.TrailBuffer, TrailBuffer); 90 | cs.SetBuffer(kernel, CsParam.NodeBuffer, NodeBuffer); 91 | } 92 | 93 | 94 | #region Debug 95 | 96 | public void DrawGizmosNodePos(float radius) 97 | { 98 | if (NodeBuffer != null && TrailBuffer != null) 99 | { 100 | var datas = new Node[NodeBuffer.count]; 101 | NodeBuffer.GetData(datas); 102 | 103 | var trails = new Trail[TrailBuffer.count]; 104 | TrailBuffer.GetData(trails); 105 | 106 | for (var trailIdx = 0; trailIdx < trailNum; ++trailIdx) 107 | { 108 | var totalInputNum = trails[trailIdx].totalInputNum; 109 | for (var i = 0; i < totalInputNum; ++i) 110 | { 111 | Gizmos.DrawWireSphere(datas[NodeNumPerTrail * trailIdx + i].pos, radius); 112 | } 113 | } 114 | } 115 | } 116 | 117 | #endregion 118 | } 119 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrail.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: f0b16560206fd47468a7a9d45b522bff 3 | timeCreated: 1485156582 4 | licenseType: Pro 5 | MonoImporter: 6 | serializedVersion: 2 7 | defaultReferences: 8 | - cs: {instanceID: 0} 9 | - _material: {fileID: 2100000, guid: c1c458d860a40bc4f836b8625223124f, type: 2} 10 | executionOrder: 0 11 | icon: {instanceID: 0} 12 | userData: 13 | assetBundleName: 14 | assetBundleVariant: 15 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailAppendNode.cs: -------------------------------------------------------------------------------- 1 | using System.Linq; 2 | using System.Runtime.InteropServices; 3 | using UnityEngine; 4 | 5 | namespace GpuTrailSystem 6 | { 7 | public abstract class GpuTrailAppendNode : MonoBehaviour, IGpuTrailAppendNode 8 | { 9 | public static class CsParam 10 | { 11 | public const string KernelAppendNode = "AppendNode"; 12 | public const string KeywordIgnoreOrigin = "IGNORE_ORIGIN"; 13 | public const string KeywordColorEnable = "COLOR_ENABLE"; 14 | 15 | public static readonly int InputCount = Shader.PropertyToID("_InputCount"); 16 | public static readonly int InputBufferPos = Shader.PropertyToID("_InputBuffer_Pos"); 17 | public static readonly int InputBufferColor = Shader.PropertyToID("_InputBuffer_Color"); 18 | } 19 | 20 | 21 | [SerializeField] 22 | protected GpuTrail gpuTrail; 23 | public GpuTrail GpuTrail => gpuTrail; 24 | 25 | 26 | public ComputeShader appendNodeCS; 27 | public bool colorEnable; 28 | [Tooltip("Ignore (0,0,0) position input")] 29 | public bool ignoreOriginInput = true; 30 | [Tooltip("Input position count per trail")] 31 | public int inputCountMax = 1; 32 | 33 | public GraphicsBuffer InputBufferPos { get; protected set; } 34 | public GraphicsBuffer InputBufferColor { get; protected set; } 35 | 36 | protected int BufferSize => gpuTrail.trailNum * inputCountMax; 37 | 38 | #region Unity 39 | 40 | protected virtual void OnDestroy() 41 | { 42 | gpuTrail?.Dispose(); 43 | ReleaseBuffers(); 44 | } 45 | 46 | #endregion 47 | 48 | 49 | protected void InitBuffers() 50 | { 51 | ReleaseBuffers(); 52 | 53 | var size = BufferSize; 54 | InputBufferPos = new GraphicsBuffer(GraphicsBuffer.Target.Structured, size, Marshal.SizeOf()); 55 | InputBufferPos.Fill(default(Vector3)); 56 | 57 | if (colorEnable) 58 | { 59 | InputBufferColor = new GraphicsBuffer(GraphicsBuffer.Target.Structured, size, Marshal.SizeOf()); 60 | InputBufferColor.Fill(Color.gray); 61 | } 62 | } 63 | 64 | protected void ReleaseBuffers() 65 | { 66 | InputBufferPos?.Release(); 67 | InputBufferColor?.Release(); 68 | } 69 | 70 | /// 71 | /// return true if inputBuffer has updated. 72 | /// 73 | /// max input count of trail 74 | protected abstract int UpdateInputBuffer(); 75 | 76 | public virtual void AppendNode() 77 | { 78 | if (!gpuTrail.IsInitialized) 79 | { 80 | PreInitGpuTrail(); 81 | gpuTrail.Init(); 82 | InitBuffers(); 83 | } 84 | 85 | var inputCount = UpdateInputBuffer(); 86 | if (inputCount > 0) 87 | { 88 | DispatchAppendNode(inputCount); 89 | } 90 | } 91 | 92 | protected virtual void PreInitGpuTrail() {} 93 | 94 | 95 | public void SetCSParams(ComputeShader cs, int kernel, int inputCount) 96 | { 97 | gpuTrail.SetCSParams(cs, kernel); 98 | 99 | 100 | SetKeyword(cs, CsParam.KeywordColorEnable, colorEnable); 101 | SetKeyword(cs, CsParam.KeywordIgnoreOrigin, ignoreOriginInput); 102 | 103 | cs.SetInt(CsParam.InputCount, inputCount); 104 | cs.SetBuffer(kernel, CsParam.InputBufferPos, InputBufferPos); 105 | if (colorEnable) 106 | { 107 | cs.SetBuffer(kernel, CsParam.InputBufferColor, InputBufferColor); 108 | } 109 | } 110 | 111 | void SetKeyword(ComputeShader cs, string keyword, bool flag) 112 | { 113 | if (flag) 114 | { 115 | cs.EnableKeyword(keyword); 116 | } 117 | else 118 | { 119 | cs.DisableKeyword(keyword); 120 | } 121 | } 122 | 123 | 124 | public void DispatchAppendNode(int inputCount) 125 | { 126 | var kernel = appendNodeCS.FindKernel(CsParam.KernelAppendNode); 127 | SetCSParams(appendNodeCS, kernel, inputCount); 128 | 129 | ComputeShaderUtility.Dispatch(appendNodeCS, kernel, gpuTrail.trailNum); 130 | 131 | /* 132 | var inputPos = new Vector3[inputBuffer_Pos.count]; 133 | inputBuffer_Pos.GetData(inputPos); 134 | 135 | var nodes = new Node[nodeBuffer.count]; 136 | nodeBuffer.GetData(nodes); 137 | nodes = nodes.Take(100).ToArray(); 138 | */ 139 | } 140 | 141 | 142 | 143 | #region Debug 144 | 145 | public float gizmosSize = 0.5f; 146 | public bool gizmosDrawInputPos; 147 | public bool gizmosDrawNodePos; 148 | 149 | public virtual void OnDrawGizmosSelected() 150 | { 151 | if (gizmosDrawInputPos) 152 | { 153 | Gizmos.color = Color.red; 154 | DrawGizmosInputPos(gizmosSize); 155 | } 156 | 157 | if (gizmosDrawNodePos) 158 | { 159 | Gizmos.color = Color.green; 160 | gpuTrail.DrawGizmosNodePos(gizmosSize); 161 | } 162 | } 163 | 164 | 165 | public void DrawGizmosInputPos(float radius) 166 | { 167 | if (InputBufferPos != null) 168 | { 169 | var data = new Vector3[InputBufferPos.count]; 170 | InputBufferPos.GetData(data); 171 | 172 | foreach (var t in data) 173 | { 174 | Gizmos.DrawWireSphere(t, radius); 175 | } 176 | } 177 | } 178 | 179 | #endregion 180 | } 181 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailAppendNode.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 15b3391b60033f340a7e8989559feaae 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: 7 | - appendNodeCS: {fileID: 7200000, guid: d1a2d7e60a9bbd54e8a06cea0893efff, type: 3} 8 | executionOrder: 0 9 | icon: {instanceID: 0} 10 | userData: 11 | assetBundleName: 12 | assetBundleVariant: 13 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailIndexDispatcher.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using UnityEngine; 3 | 4 | 5 | namespace GpuTrailSystem 6 | { 7 | /// 8 | /// C# side corresponding to GpuTrailIndexInclude.cginc 9 | /// 10 | public class GpuTrailIndexDispatcher : IDisposable 11 | { 12 | #region Static 13 | 14 | public static class CsParam 15 | { 16 | public const string KernelCalcArgsBufferForCs = "CalcArgsBufferForCS"; 17 | public static readonly int ThreadGroupSizeX = Shader.PropertyToID("_ThreadGroupSizeX"); 18 | public static readonly int TotalThreadNum = Shader.PropertyToID("_TotalThreadNum"); 19 | // ReSharper disable once InconsistentNaming 20 | public static readonly int ArgsBufferForCS = Shader.PropertyToID("_ArgsBufferForCS"); 21 | } 22 | 23 | public static class CsIncludeParam 24 | { 25 | public const string KeywordTrailIdxOn = "GPUTRAIL_TRAIL_INDEX_ON"; 26 | public static readonly int TrailIndexBuffer = Shader.PropertyToID("_TrailIndexBuffer"); 27 | public static readonly int TrailNumBuffer = Shader.PropertyToID("_TrailNumBuffer"); 28 | } 29 | 30 | static ComputeShader _computeShader; 31 | 32 | public static void Init(ComputeShader computeShader) => _computeShader = computeShader; 33 | 34 | #endregion 35 | 36 | private GraphicsBuffer _totalThreadNumBuffer; 37 | private GraphicsBuffer _argsBuffer; 38 | 39 | public void InitBuffers() 40 | { 41 | ReleaseBuffers(); 42 | 43 | _totalThreadNumBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Raw, 1, sizeof(uint)); 44 | _argsBuffer = new GraphicsBuffer(GraphicsBuffer.Target.IndirectArguments, 3, sizeof(uint)); 45 | _argsBuffer.SetData(new[] { 1, 1, 1 }); 46 | } 47 | 48 | public void ReleaseBuffers() 49 | { 50 | _totalThreadNumBuffer?.Release(); 51 | _argsBuffer?.Release(); 52 | 53 | _totalThreadNumBuffer = null; 54 | _argsBuffer = null; 55 | } 56 | 57 | public void Dispose() => ReleaseBuffers(); 58 | 59 | 60 | public void Dispatch(ComputeShader cs, int kernel, int trailNum) => _Dispatch(cs, kernel, trailNum, null); 61 | 62 | public void Dispatch(ComputeShader cs, int kernel, GraphicsBuffer trailIndexBuffer) => _Dispatch(cs, kernel, 0, trailIndexBuffer); 63 | 64 | private void _Dispatch(ComputeShader cs, int kernel, int trailNum, GraphicsBuffer trailIndexBuffer) 65 | { 66 | if (_totalThreadNumBuffer == null) InitBuffers(); 67 | 68 | var threadGroupSizeX = GetThreadGroupSizeX(cs, kernel); 69 | 70 | if (trailIndexBuffer != null) 71 | { 72 | GraphicsBuffer.CopyCount(trailIndexBuffer, _totalThreadNumBuffer, 0); 73 | 74 | UpdateArgsBuffer(trailIndexBuffer, threadGroupSizeX); 75 | SetComputeShaderParameterEnable(cs, kernel, trailIndexBuffer, _totalThreadNumBuffer); 76 | } 77 | else 78 | { 79 | UpdateArgsBuffer(trailNum, threadGroupSizeX); 80 | SetComputeShaderParameterDisable(cs); 81 | } 82 | 83 | cs.DispatchIndirect(kernel, _argsBuffer); 84 | } 85 | 86 | 87 | private static int GetThreadGroupSizeX(ComputeShader cs, int kernel) 88 | { 89 | cs.GetKernelThreadGroupSizes(kernel, out var x, out var _, out var _); 90 | return (int)x; 91 | } 92 | 93 | private void UpdateArgsBuffer(int trailNum, int threadGroupSizeX) 94 | { 95 | _totalThreadNumBuffer.SetData(new[] { trailNum }); 96 | _argsBuffer.SetData(new[] { Mathf.CeilToInt((float)trailNum / threadGroupSizeX), 1, 1 }); 97 | } 98 | 99 | public void UpdateArgsBuffer(GraphicsBuffer trailIndexBuffer, int threadGroupSizeX) 100 | { 101 | var kernel = _computeShader.FindKernel(CsParam.KernelCalcArgsBufferForCs); 102 | _computeShader.SetInt(CsParam.ThreadGroupSizeX, threadGroupSizeX); 103 | _computeShader.SetBuffer(kernel, CsParam.TotalThreadNum, _totalThreadNumBuffer); 104 | _computeShader.SetBuffer(kernel, CsParam.ArgsBufferForCS, _argsBuffer); 105 | 106 | _computeShader.Dispatch(kernel, 1, 1, 1); 107 | } 108 | 109 | 110 | public static void SetComputeShaderParameterEnable(ComputeShader cs, int kernel, GraphicsBuffer trailIndexBuffer, GraphicsBuffer trailNumBuffer) 111 | { 112 | cs.EnableKeyword(CsIncludeParam.KeywordTrailIdxOn); 113 | cs.SetBuffer(kernel, CsIncludeParam.TrailIndexBuffer, trailIndexBuffer); 114 | cs.SetBuffer(kernel, CsIncludeParam.TrailNumBuffer, trailNumBuffer); 115 | } 116 | 117 | public static void SetComputeShaderParameterDisable(ComputeShader cs) 118 | { 119 | cs.DisableKeyword(CsIncludeParam.KeywordTrailIdxOn); 120 | } 121 | 122 | } 123 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailIndexDispatcher.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 4d7118b49bb0b984fbf52757d4c638bc 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailRenderer.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using UnityEngine; 5 | 6 | namespace GpuTrailSystem 7 | { 8 | /// 9 | /// Rendering GpuTrail 10 | /// 11 | /// Processing flow: 12 | /// GpuTrailAppendNode.UpdateInputBuffer() -(InputBuffer)-> GpuTrailAppendNode.AppendNode() -(TrailBuffer,NodeBuffer)-> 13 | /// [GpuTrailCulling -(TrailIndexBuffer)->] [GpuTrailRendering_CalcLod -(TrailIndexBufers)->] 14 | /// GpuTrailRendering_Lod.UpdateVertexBuffer()/UpdateArgsBuffer() -(VertexBuffer, ArgsBuffer) -> GpuTrailRendering_Lod.OnRenderObject() 15 | /// 16 | [RequireComponent(typeof(IGpuTrailAppendNode))] 17 | public class GpuTrailRenderer : MonoBehaviour 18 | { 19 | #region Type Define 20 | 21 | [Serializable] 22 | public class LodSetting 23 | { 24 | public bool enable = true; 25 | 26 | [Tooltip("The distance where this Lod starts.\nThe smallest Lod will be treated as 0.")] 27 | public float startDistance = 0f; 28 | 29 | [Tooltip("The node steps to generate a vertex.\n1: all nodes, 2: 1/2 nodes, 3: 1/3 nodes...")] 30 | public int lodNodeStep = 1; // Node steps to generate a vertex.　1:all nodes, 2:1/2 nodes, 3:1/3 nodes... 31 | 32 | [Tooltip("The lod specific material.\nIf null then GpuTrailRenderer.defaultMaterial would be used.")] 33 | public Material material; 34 | } 35 | 36 | #endregion 37 | 38 | 39 | public ComputeShader trailIndexDispatcherCS; 40 | public ComputeShader calcLodCS; 41 | public ComputeShader cullingCS; 42 | public ComputeShader updateVertexCS; 43 | 44 | public Material defaultMaterial; 45 | public float startWidth = 0.1f; 46 | public float endWidth = 0.1f; 47 | 48 | public Camera targetCamera; 49 | 50 | public Bounds bounds = new(Vector3.zero, Vector3.one * 100000f); 51 | 52 | protected IGpuTrailAppendNode gpuTrailAppendNode; 53 | 54 | // Culling/CalcLod function can be customized. 55 | public Func calcTrailIndexBufferCulling; 56 | public Func, Camera, GpuTrail, GraphicsBuffer, IReadOnlyList> calcTrailIndexBufferCalcLod; 57 | 58 | protected GpuTrailRendererCulling defaultCulling; 59 | protected GpuTrailRendererCalcLod defaultCalcLod; 60 | 61 | [SerializeField] 62 | protected List lodSettings = new(); 63 | protected List lodList = new(); 64 | 65 | [Header("Debug")] 66 | public bool appendNodeEnable = true; 67 | public bool cullingEnable = true; 68 | public bool updateVertexEnable = true; 69 | public bool renderingEnable = true; 70 | 71 | protected GpuTrail GpuTrail => gpuTrailAppendNode.GpuTrail; 72 | protected virtual Camera TargetCamera => targetCamera != null ? targetCamera : targetCamera = Camera.main; 73 | 74 | 75 | #region Unity 76 | 77 | protected virtual void Start() 78 | { 79 | if (trailIndexDispatcherCS != null) 80 | { 81 | GpuTrailIndexDispatcher.Init(trailIndexDispatcherCS); 82 | } 83 | 84 | gpuTrailAppendNode ??= GetComponent(); 85 | 86 | if (!lodSettings.Any()) lodSettings.Add(new LodSetting()); 87 | } 88 | 89 | 90 | protected virtual void LateUpdate() 91 | { 92 | if (lodSettings.Count != lodList.Count) ResetLodList(); 93 | 94 | // AppendNode 95 | if (appendNodeEnable) 96 | { 97 | gpuTrailAppendNode.AppendNode(); 98 | } 99 | 100 | // Culling 101 | GraphicsBuffer trailIndexBufferCulling = null; 102 | if (cullingEnable) 103 | { 104 | if (calcTrailIndexBufferCulling == null) 105 | { 106 | defaultCulling = new GpuTrailRendererCulling(cullingCS); 107 | calcTrailIndexBufferCulling = defaultCulling.CalcTrailIndexBuffer; 108 | } 109 | 110 | float width = Mathf.Max(startWidth, endWidth); 111 | trailIndexBufferCulling = calcTrailIndexBufferCulling(TargetCamera, GpuTrail, width); 112 | } 113 | 114 | // CalcLod 115 | IReadOnlyList trailIndexBuffersLod = null; 116 | bool needCalcLod = lodSettings.Count > 1; 117 | if (needCalcLod) 118 | { 119 | if (calcTrailIndexBufferCalcLod == null) 120 | { 121 | defaultCalcLod = new GpuTrailRendererCalcLod(calcLodCS); 122 | calcTrailIndexBufferCalcLod = defaultCalcLod.CalcTrailIndexBuffers; 123 | } 124 | 125 | trailIndexBuffersLod = calcTrailIndexBufferCalcLod(lodSettings.Select(setting => setting.startDistance), TargetCamera, GpuTrail, trailIndexBufferCulling); 126 | } 127 | 128 | // UpdateVertex 129 | if (updateVertexEnable) 130 | { 131 | ForeachLod((lod, idx) => 132 | { 133 | var trailIndexBuffer = trailIndexBuffersLod?[idx] ?? trailIndexBufferCulling; 134 | lod.UpdateVertexBuffer(TargetCamera, startWidth, endWidth, trailIndexBuffer); 135 | }); 136 | } 137 | 138 | 139 | // UpdateArgsBuffer 140 | ForeachLod((lod, idx) => 141 | { 142 | var trailIndexBuffer = trailIndexBuffersLod?[idx] ?? trailIndexBufferCulling; 143 | if (trailIndexBuffer != null) 144 | { 145 | lod.UpdateArgsBuffer(trailIndexBuffer); 146 | } 147 | else 148 | { 149 | lod.ResetArgsBuffer(); 150 | } 151 | }); 152 | 153 | // Rendering 154 | if (renderingEnable) 155 | { 156 | ForeachLod((lod, idx) => 157 | { 158 | var settings = lodSettings[idx]; 159 | 160 | var material = settings.material; 161 | if (material == null) material = defaultMaterial; 162 | 163 | lod.Render(material, startWidth, endWidth, bounds); 164 | }); 165 | } 166 | } 167 | 168 | public virtual void OnDestroy() 169 | { 170 | DisposeLodList(); 171 | defaultCulling?.Dispose(); 172 | defaultCalcLod?.Dispose(); 173 | } 174 | 175 | #endregion 176 | 177 | 178 | 179 | void ForeachLod(Action action) 180 | { 181 | for (var i = 0; i < lodList.Count; ++i) 182 | { 183 | if (lodSettings[i].enable) 184 | { 185 | action(lodList[i], i); 186 | } 187 | } 188 | } 189 | 190 | protected void ResetLodList() 191 | { 192 | DisposeLodList(); 193 | 194 | lodList = lodSettings.Select(settings => new GpuTrailRendererLod(GpuTrail, updateVertexCS, settings)).ToList(); 195 | } 196 | 197 | private void DisposeLodList() 198 | { 199 | lodList.ForEach(lod => lod.Dispose()); 200 | lodList.Clear(); 201 | } 202 | 203 | 204 | #region Debug 205 | 206 | public void OnDrawGizmosSelected() 207 | { 208 | lodList.ForEach(lod => lod.OnDrawGizmosSelected()); 209 | } 210 | 211 | #endregion 212 | } 213 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailRenderer.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: b564af979b749d34daa757bd2fc6bcd7 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: 7 | - trailIndexDispatcherCS: {fileID: 7200000, guid: 9c598b4732a0876409c0341e40cb2b3d, 8 | type: 3} 9 | - calcLodCS: {fileID: 7200000, guid: 520ac2709c8d8744f94f20059d181905, type: 3} 10 | - cullingCS: {fileID: 7200000, guid: 29d6c2bf7e3e352488c9b6ca97a0a245, type: 3} 11 | - updateVertexCS: {fileID: 7200000, guid: 365dde5f666348548b6a22b895af03ad, type: 3} 12 | - defaultMaterial: {fileID: 2100000, guid: 5f6e1cac686a9714e9048568cfe33abf, type: 2} 13 | executionOrder: 5 14 | icon: {instanceID: 0} 15 | userData: 16 | assetBundleName: 17 | assetBundleVariant: 18 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailRendererCalcLod.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Collections.Generic; 3 | using System.Linq; 4 | using UnityEngine; 5 | 6 | namespace GpuTrailSystem 7 | { 8 | public class GpuTrailRendererCalcLod : IDisposable 9 | { 10 | public static class CsParam 11 | { 12 | public const string KernelUpdateTrailLodBuffer = "UpdateTrailLodBuffer"; 13 | public static readonly int CameraPos = Shader.PropertyToID("_CameraPos"); 14 | public static readonly int LodDistanceBuffer = Shader.PropertyToID("_LodDistanceBuffer"); 15 | public static readonly int TrailLodBufferW = Shader.PropertyToID("_TrailLodBufferW"); 16 | 17 | public const string KernelUpdateTrailIndexBuffer = "UpdateTrailIndexBuffer"; 18 | public static readonly int CurrentLod = Shader.PropertyToID("_CurrentLod"); 19 | public static readonly int TrailLodBuffer = Shader.PropertyToID("_TrailLodBuffer"); 20 | public static readonly int TrailIdxBufferAppend = Shader.PropertyToID("_TrailIdxBufferAppend"); 21 | } 22 | 23 | 24 | protected readonly ComputeShader calcLodCs; 25 | 26 | protected GraphicsBuffer lodDistanceBuffer; 27 | protected GraphicsBuffer trailLodBuffer; 28 | protected List trailIndexBuffers = new(); 29 | 30 | protected readonly GpuTrailIndexDispatcher gpuTrailIndexArgs = new(); 31 | 32 | 33 | 34 | public GpuTrailRendererCalcLod(ComputeShader calcLodCs) => this.calcLodCs = calcLodCs; 35 | 36 | 37 | public void Dispose() 38 | { 39 | ReleaseBuffers(); 40 | gpuTrailIndexArgs.Dispose(); 41 | } 42 | 43 | 44 | void ResetBuffers(int trailNum, int lodNum) 45 | { 46 | ReleaseBuffers(); 47 | lodDistanceBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, lodNum, sizeof(float)); 48 | trailLodBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, trailNum, sizeof(uint)); 49 | 50 | trailIndexBuffers = Enumerable.Range(0, lodNum) 51 | .Select(_ => new GraphicsBuffer(GraphicsBuffer.Target.Append, trailNum, sizeof(uint))) 52 | .ToList(); 53 | } 54 | 55 | void ReleaseBuffers() 56 | { 57 | lodDistanceBuffer?.Release(); 58 | trailLodBuffer?.Release(); 59 | 60 | lodDistanceBuffer = null; 61 | trailLodBuffer = null; 62 | 63 | foreach (var buf in trailIndexBuffers) buf?.Release(); 64 | trailIndexBuffers.Clear(); 65 | } 66 | 67 | 68 | // return TrailIndexBuffer in the same order as the lodDistances 69 | public virtual IReadOnlyList CalcTrailIndexBuffers(IEnumerable lodDistances, Camera camera, GpuTrail gpuTrail, GraphicsBuffer trailIndexBuffer) 70 | { 71 | var idxAndDistances = lodDistances 72 | .Select((distance, idx) => (idx, distance)) 73 | .OrderBy(pair => pair.distance) 74 | .ToList(); 75 | 76 | if (lodDistanceBuffer == null || lodDistanceBuffer.count != idxAndDistances.Count) 77 | { 78 | ResetBuffers(gpuTrail.trailNum, idxAndDistances.Count); 79 | } 80 | 81 | UpdateTrailLodBuffer( 82 | idxAndDistances.Select(pair => pair.distance).ToArray(), 83 | camera, gpuTrail, trailIndexBuffer 84 | ); 85 | 86 | UpdateTrailIndexBuffers( 87 | idxAndDistances.Select(pair => pair.idx), 88 | gpuTrail.trailNum, 89 | trailIndexBuffer 90 | ); 91 | 92 | return trailIndexBuffers; 93 | } 94 | 95 | 96 | protected void UpdateTrailLodBuffer(float[] sortedDistances, Camera camera, GpuTrail gpuTrail, GraphicsBuffer trailIndexBuffer) 97 | { 98 | lodDistanceBuffer.SetData(sortedDistances); 99 | 100 | var kernel = calcLodCs.FindKernel(CsParam.KernelUpdateTrailLodBuffer); 101 | gpuTrail.SetCSParams(calcLodCs, kernel); 102 | calcLodCs.SetVector(CsParam.CameraPos, camera.transform.position); 103 | calcLodCs.SetBuffer(kernel, CsParam.LodDistanceBuffer, lodDistanceBuffer); 104 | calcLodCs.SetBuffer(kernel, CsParam.TrailLodBufferW, trailLodBuffer); 105 | 106 | if (trailIndexBuffer != null) 107 | { 108 | gpuTrailIndexArgs.Dispatch(calcLodCs, kernel, trailIndexBuffer); 109 | } 110 | else 111 | { 112 | gpuTrailIndexArgs.Dispatch(calcLodCs, kernel, gpuTrail.trailNum); 113 | } 114 | } 115 | 116 | protected void UpdateTrailIndexBuffers(IEnumerable idxSequence, int trailNum, GraphicsBuffer trailIndexBufferForAll) 117 | { 118 | var kernel = calcLodCs.FindKernel(CsParam.KernelUpdateTrailIndexBuffer); 119 | 120 | foreach (var idx in idxSequence) 121 | { 122 | var trailIndexBufferForLod = trailIndexBuffers[idx]; 123 | trailIndexBufferForLod.SetCounterValue(0); 124 | 125 | calcLodCs.SetInt(CsParam.CurrentLod, idx); 126 | calcLodCs.SetBuffer(kernel, CsParam.TrailLodBuffer, trailLodBuffer); 127 | calcLodCs.SetBuffer(kernel, CsParam.TrailIdxBufferAppend, trailIndexBufferForLod); 128 | 129 | //ComputeShaderUtility.Dispatch(calcLodCS, kernel, trailNum); 130 | 131 | if (trailIndexBufferForAll != null) 132 | { 133 | gpuTrailIndexArgs.Dispatch(calcLodCs, kernel, trailIndexBufferForAll); 134 | } 135 | else 136 | { 137 | gpuTrailIndexArgs.Dispatch(calcLodCs, kernel, trailNum); 138 | } 139 | } 140 | 141 | /* 142 | var trailLods = new uint[trailLodBuffer.count]; 143 | trailLodBuffer.GetData(trailLods); 144 | 145 | var idxs = trailIndexBuffers.Select(buf => 146 | { 147 | var datas = new uint[buf.count]; 148 | buf.GetData(datas); 149 | return datas; 150 | }).ToList(); 151 | */ 152 | } 153 | } 154 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailRendererCalcLod.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 4d1bab49a16a0b64c9f9c254809230c4 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: 7 | - calcLodCS: {fileID: 7200000, guid: 520ac2709c8d8744f94f20059d181905, type: 3} 8 | executionOrder: 0 9 | icon: {instanceID: 0} 10 | userData: 11 | assetBundleName: 12 | assetBundleVariant: 13 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailRendererCulling.cs: -------------------------------------------------------------------------------- 1 | using System.Linq; 2 | using UnityEngine; 3 | 4 | namespace GpuTrailSystem 5 | { 6 | public class GpuTrailRendererCulling 7 | { 8 | public static class CsParam 9 | { 10 | public const string KernelUpdateTrailIdxBuffer = "UpdateTrailIdxBuffer"; 11 | public static readonly int CameraFrustumNormals = Shader.PropertyToID("_CameraFrustumNormals"); 12 | public static readonly int TrailWidth = Shader.PropertyToID("_TrailWidth"); 13 | public static readonly int CameraPos = Shader.PropertyToID("_CameraPos"); 14 | public static readonly int TrailIndexBufferAppend = Shader.PropertyToID("_TrailIndexBufferAppend"); 15 | } 16 | 17 | 18 | protected readonly ComputeShader cullingCs; 19 | protected GraphicsBuffer trailIndexBuffer; 20 | 21 | public bool debugCameraPosLocalOffsetEnable = default; 22 | public Vector3 debugCameraPosLocalOffset = default; 23 | 24 | 25 | public GpuTrailRendererCulling(ComputeShader cullingCs) => this.cullingCs = cullingCs; 26 | 27 | public void Dispose() 28 | { 29 | ReleaseBuffer(); 30 | } 31 | 32 | 33 | void InitBuffer(int trailNum) 34 | { 35 | trailIndexBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Append, trailNum, sizeof(uint)); 36 | } 37 | 38 | void ReleaseBuffer() 39 | { 40 | trailIndexBuffer?.Release(); 41 | } 42 | 43 | public GraphicsBuffer CalcTrailIndexBuffer(Camera camera, GpuTrail gpuTrail, float trailWidth) 44 | { 45 | if (trailIndexBuffer == null) 46 | { 47 | InitBuffer(gpuTrail.trailNum); 48 | } 49 | 50 | var cameraTrans = camera.transform; 51 | var cameraPos = cameraTrans.position; 52 | if (debugCameraPosLocalOffsetEnable) 53 | { 54 | cameraPos += cameraTrans.rotation * debugCameraPosLocalOffset; 55 | } 56 | 57 | var planes = GeometryUtility.CalculateFrustumPlanes(camera); 58 | var normals = planes.Take(4).Select(p => p.normal).ToList(); 59 | var normalsFloat = Enumerable.Range(0, 3).SelectMany(i => normals.Select(n => n[i])).ToArray(); // row major -> column major 60 | 61 | 62 | trailIndexBuffer.SetCounterValue(0); 63 | 64 | var kernel = cullingCs.FindKernel(CsParam.KernelUpdateTrailIdxBuffer); 65 | gpuTrail.SetCSParams(cullingCs, kernel); 66 | cullingCs.SetFloat(CsParam.TrailWidth, trailWidth); 67 | cullingCs.SetFloats(CsParam.CameraFrustumNormals, normalsFloat); 68 | cullingCs.SetVector(CsParam.CameraPos, cameraPos); 69 | cullingCs.SetBuffer(kernel, CsParam.TrailIndexBufferAppend, trailIndexBuffer); 70 | 71 | ComputeShaderUtility.Dispatch(cullingCs, kernel, gpuTrail.trailNum); 72 | 73 | return trailIndexBuffer; 74 | 75 | #if true 76 | } 77 | #else 78 | if (tmpBuf == null) 79 | { 80 | tmpBuf = new GraphicsBuffer(GraphicsBuffer.Target.IndirectArguments, 1, sizeof(uint)); 81 | } 82 | GraphicsBuffer.CopyCount(trailIndexBuffer, tmpBuf, 0); 83 | var count = new uint[1]; 84 | tmpBuf.GetData(count); 85 | Debug.Log(count.First()); 86 | var trailIdx = new uint[trailIndexBuffer.count]; 87 | trailIndexBuffer.GetData(trailIdx); 88 | } 89 | GraphicsBuffer tmpBuf; 90 | #endif 91 | } 92 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailRendererCulling.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: bbf99238d7d4b32408c405a84e1053b4 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailRendererLod.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using System.Linq; 3 | using System.Runtime.InteropServices; 4 | using Unity.Collections; 5 | using UnityEngine; 6 | using UnityEngine.Assertions; 7 | using UnityEngine.Pool; 8 | using UnityEngine.XR; 9 | 10 | namespace GpuTrailSystem 11 | { 12 | public class GpuTrailRendererLod : IDisposable 13 | { 14 | #region Static 15 | 16 | public static class CsParam 17 | { 18 | public const string KernelUpdateVertex = "UpdateVertex"; 19 | 20 | public static readonly int Time = Shader.PropertyToID("_Time"); 21 | public static readonly int ToCameraDir = Shader.PropertyToID("_ToCameraDir"); 22 | public static readonly int CameraPos = Shader.PropertyToID("_CameraPos"); 23 | public static readonly int StartWidth = Shader.PropertyToID("_StartWidth"); 24 | public static readonly int EndWidth = Shader.PropertyToID("_EndWidth"); 25 | public static readonly int VertexBuffer = Shader.PropertyToID("_VertexBuffer"); 26 | public static readonly int LodNodeStep = Shader.PropertyToID("_LodNodeStep"); 27 | 28 | 29 | public const string KernelArgsBufferMultiply = "ArgsBufferMultiply"; 30 | public static readonly int ArgsBuffer = Shader.PropertyToID("_ArgsBuffer"); 31 | } 32 | 33 | public static class ShaderParam 34 | { 35 | public static readonly int StartWidth = Shader.PropertyToID("_StartWidth"); 36 | public static readonly int EndWidth = Shader.PropertyToID("_EndWidth"); 37 | public static readonly int VertexNumPerTrail = Shader.PropertyToID("_VertexNumPerTrail"); 38 | public static readonly int VertexBuffer = Shader.PropertyToID("_VertexBuffer"); 39 | 40 | public static readonly int TrailIndexBuffer = Shader.PropertyToID("_TrailIndexBuffer"); 41 | } 42 | 43 | #endregion 44 | 45 | 46 | protected readonly GpuTrail gpuTrail; 47 | protected readonly ComputeShader computeShader; 48 | protected readonly GpuTrailRenderer.LodSetting lodSetting; 49 | protected readonly GpuTrailIndexDispatcher gpuTrailIndexDispatcher = new(); 50 | 51 | protected GraphicsBuffer vertexBuffer; 52 | protected GraphicsBuffer indexBuffer; 53 | protected GraphicsBuffer argsBuffer; 54 | 55 | 56 | private int LodNodeStep => lodSetting.lodNodeStep; 57 | 58 | public MaterialPropertyBlock PropertyBlock { get; } = new(); 59 | 60 | public int NodeNumPerTrailWithLod => gpuTrail.NodeNumPerTrail / LodNodeStep; 61 | public int VertexNumPerTrail => NodeNumPerTrailWithLod * 2; 62 | public int VertexBufferSize => gpuTrail.trailNum * VertexNumPerTrail; 63 | public int IndexNumPerTrail => (NodeNumPerTrailWithLod - 1) * 6; 64 | 65 | public GpuTrailRendererLod(GpuTrail gpuTrail, ComputeShader computeShader, GpuTrailRenderer.LodSetting lodSetting) 66 | { 67 | this.gpuTrail = gpuTrail; 68 | this.computeShader = computeShader; 69 | this.lodSetting = lodSetting; 70 | } 71 | 72 | 73 | public void Dispose() 74 | { 75 | ReleaseBuffers(); 76 | gpuTrailIndexDispatcher.Dispose(); 77 | } 78 | 79 | 80 | protected void InitBufferIfNeed() 81 | { 82 | if ((vertexBuffer != null) && (vertexBuffer.count == VertexBufferSize)) 83 | { 84 | return; 85 | } 86 | 87 | Assert.IsTrue(0 < LodNodeStep && LodNodeStep < gpuTrail.NodeNumPerTrail, $"Invalid lodNodeStep[{LodNodeStep}]"); 88 | 89 | 90 | ReleaseBuffers(); 91 | 92 | vertexBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Structured, VertexBufferSize, Marshal.SizeOf()); // 1 node to 2 vtx(left,right) 93 | vertexBuffer.Fill(default(Vertex)); 94 | 95 | 96 | indexBuffer = new GraphicsBuffer(GraphicsBuffer.Target.Index | GraphicsBuffer.Target.Structured, IndexNumPerTrail, Marshal.SizeOf()); // 1 node to 2 triangles(6vertexs) 97 | 98 | 99 | #if UNITY_2022_2_OR_NEWER 100 | using var indexArray = new NativeArray(indexBuffer.count, Allocator.Temp); 101 | var indices = indexArray.AsSpan(); 102 | #else 103 | var indices = new NativeArray(IndexNumPerTrail, Allocator.Temp); 104 | #endif 105 | // 各Nodeの最後と次のNodeの最初はポリゴンを繋がないので-1 106 | var idx = 0; 107 | for (var iNode = 0; iNode < NodeNumPerTrailWithLod - 1; ++iNode) 108 | { 109 | var offset = iNode * 2; 110 | indices[idx++] = 0 + offset; 111 | indices[idx++] = 1 + offset; 112 | indices[idx++] = 2 + offset; 113 | indices[idx++] = 2 + offset; 114 | indices[idx++] = 1 + offset; 115 | indices[idx++] = 3 + offset; 116 | } 117 | 118 | #if UNITY_2022_2_OR_NEWER 119 | indexBuffer.SetData(indexArray); 120 | #else 121 | indexBuffer.SetData(indices); 122 | indices.Dispose(); 123 | #endif 124 | 125 | 126 | argsBuffer = new GraphicsBuffer(GraphicsBuffer.Target.IndirectArguments, 5, sizeof(uint)); 127 | ResetArgsBuffer(); 128 | } 129 | 130 | protected void ReleaseBuffers() 131 | { 132 | vertexBuffer?.Release(); 133 | indexBuffer?.Release(); 134 | argsBuffer?.Release(); 135 | 136 | vertexBuffer = null; 137 | indexBuffer = null; 138 | argsBuffer = null; 139 | } 140 | 141 | public void UpdateVertexBuffer(Camera camera, float startWidth, float endWidth, GraphicsBuffer trailIndexBuffer) 142 | { 143 | InitBufferIfNeed(); 144 | 145 | var toCameraDir = default(Vector3); 146 | if (camera.orthographic) 147 | { 148 | toCameraDir = -camera.transform.forward; 149 | } 150 | 151 | computeShader.SetFloat(CsParam.Time, Time.time); 152 | 153 | computeShader.SetVector(CsParam.ToCameraDir, toCameraDir); 154 | computeShader.SetVector(CsParam.CameraPos, camera.transform.position); 155 | 156 | computeShader.SetFloat(CsParam.StartWidth, startWidth); 157 | computeShader.SetFloat(CsParam.EndWidth, endWidth); 158 | computeShader.SetInt(CsParam.LodNodeStep, LodNodeStep); 159 | 160 | var kernel = computeShader.FindKernel(CsParam.KernelUpdateVertex); 161 | gpuTrail.SetCSParams(computeShader, kernel); 162 | computeShader.SetBuffer(kernel, CsParam.VertexBuffer, vertexBuffer); 163 | 164 | if (trailIndexBuffer != null) 165 | { 166 | gpuTrailIndexDispatcher.Dispatch(computeShader, kernel, trailIndexBuffer); 167 | } 168 | else 169 | { 170 | gpuTrailIndexDispatcher.Dispatch(computeShader, kernel, gpuTrail.trailNum); 171 | } 172 | 173 | 174 | 175 | #if false 176 | var trails = new Trail[gpuTrail.trailBuffer.count]; 177 | gpuTrail.trailBuffer.GetData(trails); 178 | var lastNodeIdx = trails[0].totalInputNum % gpuTrail.nodeNumPerTrail; 179 | 180 | var nodes = new Node[gpuTrail.nodeBuffer.count]; 181 | gpuTrail.nodeBuffer.GetData(nodes); 182 | //nodes = nodes.Take(100).ToArray(); 183 | var idxAndNodes = Enumerable.Range(0, nodes.Length) 184 | .Zip(nodes, (i, node) => new { i, node }) 185 | .OrderByDescending(iNode => iNode.node.time) 186 | .ToList(); 187 | 188 | var vtxs = new Vertex[vertexBuffer.count]; 189 | vertexBuffer.GetData(vtxs); 190 | //vtxs = vtxs.Take(100).ToArray(); 191 | vtxs = vtxs.ToArray(); 192 | for (var i = 0; i < vtxs.Length; ++i) 193 | { 194 | if (vtxs[i].pos == Vector3.zero) 195 | { 196 | Debug.Log(i); 197 | } 198 | } 199 | #endif 200 | } 201 | 202 | 203 | // SinglePassInstanced requires you to manually double the number of instances 204 | // https://docs.unity3d.com/Manual/SinglePassInstancing.html 205 | protected bool IsSinglePassInstancedRendering => XRSettings.enabled && XRSettings.stereoRenderingMode == XRSettings.StereoRenderingMode.SinglePassInstanced; 206 | 207 | public void UpdateArgsBuffer(GraphicsBuffer trailIndexBuffer) 208 | { 209 | InitBufferIfNeed(); 210 | 211 | GraphicsBuffer.CopyCount(trailIndexBuffer, argsBuffer, 4); 212 | 213 | if (IsSinglePassInstancedRendering) 214 | { 215 | var kernelArgsBufferMultiply = computeShader.FindKernel(CsParam.KernelArgsBufferMultiply); 216 | computeShader.SetBuffer(kernelArgsBufferMultiply, CsParam.ArgsBuffer, argsBuffer); 217 | 218 | computeShader.Dispatch(kernelArgsBufferMultiply, 1, 1, 1); 219 | } 220 | 221 | /* 222 | var data = new int[4]; 223 | argsBuffer.GetData(data); 224 | Debug.Log($"{data[0]} {data[1]} {data[2]} {data[3]}"); 225 | */ 226 | } 227 | 228 | public void ResetArgsBuffer() 229 | { 230 | InitBufferIfNeed(); 231 | 232 | using var _ = ListPool.Get(out var argsList); 233 | 234 | argsList.Add(IndexNumPerTrail); 235 | argsList.Add(gpuTrail.trailNum * (IsSinglePassInstancedRendering ? 2 : 1)); 236 | argsList.Add(0); 237 | argsList.Add(0); 238 | argsList.Add(0); 239 | 240 | argsBuffer.SetData(argsList); 241 | } 242 | 243 | 244 | public void Render(Material material, float startWidth, float endWidth, in Bounds bounds) 245 | { 246 | PropertyBlock.SetFloat(ShaderParam.StartWidth, startWidth); 247 | PropertyBlock.SetFloat(ShaderParam.EndWidth, endWidth); 248 | PropertyBlock.SetInt(ShaderParam.VertexNumPerTrail, VertexNumPerTrail); 249 | PropertyBlock.SetBuffer(ShaderParam.VertexBuffer, vertexBuffer); 250 | var renderParams = new RenderParams(material) 251 | { 252 | matProps = PropertyBlock, 253 | worldBounds = bounds 254 | }; 255 | 256 | Graphics.RenderPrimitivesIndexedIndirect(renderParams, MeshTopology.Triangles, indexBuffer, argsBuffer); 257 | } 258 | 259 | 260 | #region Debug 261 | 262 | public bool debugDrawVertexBuf = false; 263 | 264 | public void OnDrawGizmosSelected() 265 | { 266 | if (debugDrawVertexBuf) 267 | { 268 | var defaultColor = Color.yellow; 269 | Gizmos.color = defaultColor; 270 | 271 | var data = new Vertex[vertexBuffer.count]; 272 | vertexBuffer.GetData(data); 273 | 274 | var num = vertexBuffer.count / 2; 275 | for (var i = 0; i < num; ++i) 276 | { 277 | Color? tmpColor = null; 278 | if (i == 0) { tmpColor = Color.red; } 279 | if (i == num - 1) { tmpColor = Color.green; } 280 | 281 | if (tmpColor.HasValue) 282 | { 283 | Gizmos.color = tmpColor.Value; 284 | 285 | } 286 | 287 | var v0 = data[2 * i]; 288 | var v1 = data[2 * i + 1]; 289 | 290 | Gizmos.DrawLine(v0.pos, v1.pos); 291 | 292 | if (tmpColor.HasValue) 293 | { 294 | Gizmos.color = defaultColor; 295 | } 296 | } 297 | } 298 | } 299 | 300 | #endregion 301 | } 302 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/GpuTrailRendererLod.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: e9523a14b96313a4f932934c05728bbe 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/IGpuTrailAppendNode.cs: -------------------------------------------------------------------------------- 1 | namespace GpuTrailSystem 2 | { 3 | public interface IGpuTrailAppendNode 4 | { 5 | public GpuTrail GpuTrail { get; } 6 | public void AppendNode(); 7 | } 8 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/IGpuTrailAppendNode.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: e45ac27003adea44caa902015ccfda3d 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Node.cs: -------------------------------------------------------------------------------- 1 | using UnityEngine; 2 | 3 | 4 | namespace GpuTrailSystem 5 | { 6 | /// 7 | /// Points that make up a Trail. Vertices for display are generated from Node. 8 | /// 9 | public struct Node 10 | { 11 | public Vector3 pos; 12 | public float time; 13 | public Color color; 14 | } 15 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Node.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: e2f8a6506cba5224f9575cd6b1be393c 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Trail.cs: -------------------------------------------------------------------------------- 1 | namespace GpuTrailSystem 2 | { 3 | public struct Trail 4 | { 5 | public float startTime; 6 | public int totalInputNum; 7 | } 8 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Trail.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: f0d037f00f371d94cbeb18a36d7f22ff 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Utility.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: c872561c7d1f8d94995a933c4dc92c33 3 | folderAsset: yes 4 | DefaultImporter: 5 | externalObjects: {} 6 | userData: 7 | assetBundleName: 8 | assetBundleVariant: 9 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Utility/GraphicsBufferUtility.cs: -------------------------------------------------------------------------------- 1 | using Unity.Collections; 2 | using UnityEngine; 3 | 4 | namespace GpuTrailSystem 5 | { 6 | public static class GraphicsBufferUtility 7 | { 8 | public static void Fill(this GraphicsBuffer buffer, T element) where T : struct 9 | { 10 | #if UNITY_2022_2_OR_NEWER 11 | using var array = new NativeArray(buffer.count, Allocator.Temp); 12 | array.AsSpan().Fill(element); 13 | buffer.SetData(array); 14 | #else 15 | var array = new NativeArray(buffer.count, Allocator.Temp); 16 | for(var i=0; i 9 | /// start～end をつなぐ曲線上の点をtに応じて求める 10 | /// http://t-pot.com/program/2_3rdcurve/index.html 11 | /// 12 | /// 0f~1f 13 | public static Vector3 CatmullRom(float t, Vector3 prev, Vector3 start, Vector3 end) 14 | { 15 | var t2 = t * t; 16 | 17 | return 18 | 0.5f * ( 19 | t2 * (prev - 2f * start + end) 20 | + t * (-prev + end) 21 | ) 22 | + start; 23 | } 24 | } 25 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Utility/Spline.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: da5faf7b1f746384d81a9c52f7888fc0 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Vertex.cs: -------------------------------------------------------------------------------- 1 | using UnityEngine; 2 | 3 | 4 | namespace GpuTrailSystem 5 | { 6 | /// 7 | /// for Shader 8 | /// 9 | public struct Vertex 10 | { 11 | public Vector3 pos; 12 | public Vector2 uv; 13 | public Color color; 14 | } 15 | 16 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Scripts/Vertex.cs.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 08c89c50485e12a4ab172464e886fde1 3 | MonoImporter: 4 | externalObjects: {} 5 | serializedVersion: 2 6 | defaultReferences: [] 7 | executionOrder: 0 8 | icon: {instanceID: 0} 9 | userData: 10 | assetBundleName: 11 | assetBundleVariant: 12 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: a1d66267cc501904a9c9aa9edefad629 3 | folderAsset: yes 4 | timeCreated: 1484908254 5 | licenseType: Pro 6 | DefaultImporter: 7 | userData: 8 | assetBundleName: 9 | assetBundleVariant: 10 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GPUTrailVertex.hlsl: -------------------------------------------------------------------------------- 1 | #ifndef GPUTRAIL_VARTEX_INCLUDED 2 | #define GPUTRAIL_VARTEX_INCLUDED 3 | 4 | struct Vertex 5 | { 6 | float3 pos; 7 | float2 uv; 8 | half4 color; 9 | }; 10 | 11 | inline Vertex GetDefaultVertex() { 12 | 13 | Vertex ret; 14 | ret.pos = (0).xxx; 15 | ret.uv = (-1).xx; 16 | ret.color = (0).xxxx; 17 | 18 | return ret; 19 | } 20 | 21 | 22 | #endif // GPUTRAIL_VARTEX_INCLUDED 23 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GPUTrailVertex.hlsl.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: e058e7b64d52fb34694b30d915f4b580 3 | ShaderIncludeImporter: 4 | externalObjects: {} 5 | userData: 6 | assetBundleName: 7 | assetBundleVariant: 8 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrail.shader: -------------------------------------------------------------------------------- 1 | Shader "GpuTrail/StartEndColor" { 2 | Properties { 3 | _StartColor("StartColor", Color) = (1,1,1,1) 4 | _EndColor("EndColor", Color) = (0,0,0,1) 5 | } 6 | 7 | SubShader { 8 | Tags { "Queue" = "Transparent" } 9 | 10 | Pass{ 11 | Cull Off Fog { Mode Off } 12 | ZWrite Off 13 | Blend SrcAlpha One 14 | 15 | CGPROGRAM 16 | #pragma target 5.0 17 | 18 | #pragma vertex vert 19 | #pragma fragment frag 20 | 21 | #include "UnityCG.cginc" 22 | #include "GpuTrailShaderInclude.hlsl" 23 | 24 | float4 _StartColor; 25 | float4 _EndColor; 26 | 27 | struct vs_out { 28 | float4 pos : SV_POSITION; 29 | float4 col : COLOR; 30 | float2 uv : TEXCOORD; 31 | }; 32 | 33 | vs_out vert (uint vId : SV_VertexID, uint iId : SV_InstanceID) 34 | { 35 | vs_out Out; 36 | Vertex vtx = GetVertex(vId, iId); 37 | 38 | Out.pos = UnityObjectToClipPos(float4(vtx.pos, 1.0)); 39 | Out.uv = vtx.uv; 40 | Out.col = lerp(_EndColor, _StartColor, vtx.uv.x); 41 | //Out.col = vtx.color; 42 | 43 | return Out; 44 | } 45 | 46 | fixed4 frag (vs_out In) : COLOR0 47 | { 48 | return In.col; 49 | } 50 | 51 | ENDCG 52 | 53 | } 54 | } 55 | } 56 | 57 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrail.shader.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 753c44b9fec068b40a762cfa65734feb 3 | ShaderImporter: 4 | externalObjects: {} 5 | defaultTextures: [] 6 | nonModifiableTextures: [] 7 | preprocessorOverride: 0 8 | userData: 9 | assetBundleName: 10 | assetBundleVariant: 11 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailAppendNode.compute: -------------------------------------------------------------------------------- 1 | #pragma kernel AppendNode NUM_THREAD_X=32 2 | 3 | #pragma multi_compile _ IGNORE_ORIGIN 4 | #pragma multi_compile _ COLOR_ENABLE 5 | 6 | #include "GpuTrailCSInclude.hlsl" 7 | 8 | uint _InputCount; 9 | StructuredBuffer _InputBuffer_Pos; 10 | #ifdef COLOR_ENABLE 11 | StructuredBuffer _InputBuffer_Color; 12 | #endif 13 | RWStructuredBuffer _TrailBuffer; 14 | RWStructuredBuffer _NodeBuffer; 15 | 16 | [numthreads(NUM_THREAD_X,1,1)] 17 | void AppendNode (uint3 id : SV_DispatchThreadID) 18 | { 19 | uint trailIdx = id.x; 20 | if ( trailIdx < _TrailNum ) 21 | { 22 | Trail trail = _TrailBuffer[trailIdx]; 23 | uint totalInputNum = trail.totalInputNum; 24 | 25 | 26 | for(uint validCount = 0; validCount<_InputCount; ++validCount) 27 | { 28 | uint inputBufferIdx = _TrailNum * validCount + trailIdx; 29 | float3 inputPos = _InputBuffer_Pos[inputBufferIdx]; 30 | 31 | #ifdef IGNORE_ORIGIN 32 | if (all(inputPos == 0)) break; 33 | #endif 34 | } 35 | 36 | 37 | bool isFirst = (totalInputNum==0); 38 | float lastTime = _Time; 39 | float3 lastPos = (3.402823466e+38F).xxx; // float max 40 | if ( !isFirst) 41 | { 42 | Node lastNode = _NodeBuffer[calcNodeIdx(trailIdx, totalInputNum-1)]; 43 | lastTime = lastNode.time; 44 | lastPos =lastNode.pos; 45 | } 46 | else if (validCount>0) 47 | { 48 | trail.startTime = _Time; 49 | } 50 | 51 | 52 | for(uint i = 0; i _NodeBuffer; 15 | StructuredBuffer _LodDistanceBuffer; // Order By distance 16 | RWStructuredBuffer _TrailLodBufferW; 17 | 18 | [numthreads(NUM_THREAD_X,1,1)] 19 | void UpdateTrailLodBuffer (uint3 id : SV_DispatchThreadID) 20 | { 21 | uint trailIdxBufferIdx = id.x; 22 | if ( trailIdxBufferIdx < GetTrailNum() ) 23 | { 24 | uint trailIdx = GetTrailIdx(trailIdxBufferIdx); 25 | 26 | float minDistanceSq = -1.0; 27 | 28 | uint nodeIdxStart = calcNodeIdx(trailIdx, 0); 29 | uint nodeIdxEnd = nodeIdxStart + _NodeNumPerTrail; 30 | for(uint nodeIdx = nodeIdxStart; nodeIdx < nodeIdxEnd; nodeIdx++) 31 | { 32 | Node node = _NodeBuffer[nodeIdx]; 33 | if ( node.time > 0) 34 | { 35 | float3 posFromCamera = node.pos - _CameraPos; 36 | float distanceSq = dot(posFromCamera, posFromCamera); 37 | 38 | minDistanceSq = (minDistanceSq<0) ? distanceSq : min(minDistanceSq, distanceSq); 39 | } 40 | } 41 | 42 | 43 | float minDistance = sqrt(minDistanceSq); 44 | 45 | uint num, stride; 46 | _LodDistanceBuffer.GetDimensions(num, stride); 47 | 48 | uint nextLod=1; 49 | for(; nextLod _TrailLodBuffer; 67 | AppendStructuredBuffer _TrailIdxBufferAppend; 68 | 69 | [numthreads(NUM_THREAD_X,1,1)] 70 | void UpdateTrailIndexBuffer (uint3 id : SV_DispatchThreadID) 71 | { 72 | uint trailIdxBufferIdx = id.x; 73 | if ( trailIdxBufferIdx < GetTrailNum() ) 74 | { 75 | uint trailIdx = GetTrailIdx(trailIdxBufferIdx); 76 | if (_TrailLodBuffer[trailIdx] == _CurrentLod) 77 | { 78 | _TrailIdxBufferAppend.Append(trailIdx); 79 | } 80 | } 81 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailCalcLod.compute.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 520ac2709c8d8744f94f20059d181905 3 | ComputeShaderImporter: 4 | userData: 5 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailCulling.compute: -------------------------------------------------------------------------------- 1 | #pragma kernel UpdateTrailIdxBuffer NUM_THREAD_X=32 2 | 3 | #include "GpuTrailCSInclude.hlsl" 4 | 5 | 6 | //////////////////////////////////////////////////////////////////////////////// 7 | // UpdateTrailIdxBuffer 8 | //////////////////////////////////////////////////////////////////////////////// 9 | float _TrailWidth; 10 | float3 _CameraPos; 11 | float4x3 _CameraFrustumNormals; 12 | StructuredBuffer _NodeBuffer; 13 | AppendStructuredBuffer _TrailIndexBufferAppend; 14 | 15 | [numthreads(NUM_THREAD_X,1,1)] 16 | void UpdateTrailIdxBuffer (uint3 id : SV_DispatchThreadID) 17 | { 18 | uint trailIdx = id.x; 19 | if ( trailIdx < _TrailNum ) 20 | { 21 | uint nodeIdxStart = calcNodeIdx(trailIdx, 0); 22 | uint nodeIdxEnd = nodeIdxStart + _NodeNumPerTrail; 23 | for(uint nodeIdx = nodeIdxStart; nodeIdx < nodeIdxEnd; nodeIdx++) 24 | { 25 | Node node = _NodeBuffer[nodeIdx]; 26 | if ( node.time > 0) 27 | { 28 | // CheckCulling! 29 | float3 posFromCamera = node.pos - _CameraPos; 30 | 31 | if ( 32 | /* 33 | (dot(_CameraFrustumNormals[0], posFromCamera) > -_TrailWidth) 34 | && (dot(_CameraFrustumNormals[1], posFromCamera) > -_TrailWidth) 35 | && (dot(_CameraFrustumNormals[2], posFromCamera) > -_TrailWidth) 36 | && (dot(_CameraFrustumNormals[3], posFromCamera) > -_TrailWidth) 37 | */ 38 | all(mul(_CameraFrustumNormals, posFromCamera) > -_TrailWidth) 39 | ) 40 | { 41 | _TrailIndexBufferAppend.Append(trailIdx); 42 | break; 43 | } 44 | } 45 | } 46 | } 47 | } 48 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailCulling.compute.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 29d6c2bf7e3e352488c9b6ca97a0a245 3 | ComputeShaderImporter: 4 | userData: 5 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailIndexDispatcher.compute: -------------------------------------------------------------------------------- 1 | #pragma kernel CalcArgsBufferForCS 2 | #pragma kernel ArgsBufferMultiply 3 | 4 | 5 | //////////////////////////////////////////////////////////////////////////////// 6 | // CalcArgsBufferForCS 7 | //////////////////////////////////////////////////////////////////////////////// 8 | uint _ThreadGroupSizeX; 9 | StructuredBuffer _TotalThreadNum; 10 | RWStructuredBuffer _ArgsBufferForCS; 11 | 12 | [numthreads(1,1,1)] 13 | void CalcArgsBufferForCS() 14 | { 15 | float groupNumX = ceil((float)_TotalThreadNum[0] / _ThreadGroupSizeX); 16 | _ArgsBufferForCS[0] = groupNumX; 17 | _ArgsBufferForCS[1] = 1; 18 | _ArgsBufferForCS[2] = 1; 19 | } 20 | 21 | //////////////////////////////////////////////////////////////////////////////// 22 | // ArgsBufferMultipy 23 | //////////////////////////////////////////////////////////////////////////////// 24 | RWStructuredBuffer _ArgsBuffer; 25 | 26 | [numthreads(1,1,1)] 27 | void ArgsBufferMultiply() 28 | { 29 | uint v = _ArgsBuffer[1]; 30 | _ArgsBuffer[1] = v * 2; 31 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailIndexDispatcher.compute.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 9c598b4732a0876409c0341e40cb2b3d 3 | ComputeShaderImporter: 4 | externalObjects: {} 5 | currentAPIMask: 4 6 | preprocessorOverride: 0 7 | userData: 8 | assetBundleName: 9 | assetBundleVariant: 10 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailIndexInclude.hlsl: -------------------------------------------------------------------------------- 1 | #ifndef GPUTRAIL_INDEX_INCLUDED 2 | #define GPUTRAIL_INDEX_INCLUDED 3 | 4 | // Put the following #pragma line in your .compute file and call [Shader/ComputeShader].EnableKeyword() on the C# side to make it work 5 | // #pragma multi_compile __ GPUTRAIL_TRAIL_INDEX_ON 6 | 7 | #ifdef GPUTRAIL_TRAIL_INDEX_ON 8 | 9 | 10 | StructuredBuffer _TrailIndexBuffer; 11 | ByteAddressBuffer _TrailNumBuffer; // It is a buffer because it gets its value from GraphicsBuffer.CopyCount. 12 | 13 | inline uint GetTrailIdx(uint bufferIdx) 14 | { 15 | return _TrailIndexBuffer[bufferIdx]; 16 | } 17 | 18 | inline uint GetTrailNum() 19 | { 20 | return _TrailNumBuffer.Load(0); 21 | } 22 | 23 | #else 24 | 25 | 26 | #include "GpuTrailCSInclude.hlsl" 27 | 28 | inline uint GetTrailIdx(uint bufferIdx) 29 | { 30 | return bufferIdx; 31 | } 32 | 33 | inline uint GetTrailNum() 34 | { 35 | return _TrailNum; 36 | } 37 | 38 | #endif // GPUTRAIL_TRAIL_INDEX_ON 39 | 40 | 41 | #endif // GPUTRAIL_INDEX_INCLUDED 42 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailIndexInclude.hlsl.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: f8aba81880be8ef48a0aaf682b04d5d9 3 | ShaderIncludeImporter: 4 | externalObjects: {} 5 | userData: 6 | assetBundleName: 7 | assetBundleVariant: 8 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailShaderInclude.hlsl: -------------------------------------------------------------------------------- 1 | #ifndef GPUTRAIL_VARIABLES_INCLUDED 2 | #define GPUTRAIL_VARIABLES_INCLUDED 3 | 4 | #include "GpuTrailVertex.hlsl" 5 | 6 | float _StartWidth; 7 | float _EndWidth; 8 | 9 | uint _VertexNumPerTrail; 10 | StructuredBuffer _VertexBuffer; 11 | 12 | 13 | Vertex GetVertex(uint vertexIdx, uint trailIdx) 14 | { 15 | uint idx = vertexIdx + (trailIdx * _VertexNumPerTrail); 16 | return _VertexBuffer[idx]; 17 | } 18 | 19 | #endif // GPUTRAIL_VARIABLES_INCLUDED 20 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailShaderInclude.hlsl.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 6808c66d9ad0a8c4c9f55c0758c1fd39 3 | ShaderIncludeImporter: 4 | externalObjects: {} 5 | userData: 6 | assetBundleName: 7 | assetBundleVariant: 8 | -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailUpdateVertex.compute: -------------------------------------------------------------------------------- 1 | #pragma kernel UpdateVertex NUM_THREAD_X=128 2 | #pragma kernel ArgsBufferMultiply NUM_THREAD_X=1 3 | 4 | #pragma multi_compile_local __ GPUTRAIL_TRAIL_INDEX_ON 5 | 6 | #include "GpuTrailVertex.hlsl" 7 | #include "GpuTrailCSInclude.hlsl" 8 | #include "GpuTrailIndexInclude.hlsl" 9 | 10 | //////////////////////////////////////////////////////////////////////////////// 11 | // UpdateVertex 12 | //////////////////////////////////////////////////////////////////////////////// 13 | StructuredBuffer _TrailBuffer; 14 | StructuredBuffer _NodeBuffer; 15 | RWStructuredBuffer _VertexBuffer; 16 | 17 | float3 _ToCameraDir; // for orthographic camera 18 | float3 _CameraPos; // for perspective camera 19 | float _StartWidth; 20 | float _EndWidth; 21 | uint _LodNodeStep; 22 | 23 | 24 | inline bool useToCameraDir() 25 | { 26 | return all(_ToCameraDir == 0); 27 | } 28 | 29 | inline float3 calcToCameraDir(float3 pos) 30 | { 31 | return useToCameraDir() ? normalize(_CameraPos - pos) : _ToCameraDir; 32 | } 33 | 34 | 35 | inline uint minusIdxInTrail(uint idx, uint minus) 36 | { 37 | return (idx + _NodeNumPerTrail-minus) % _NodeNumPerTrail; 38 | } 39 | inline uint calcPrevIdxInTrail(uint idx) 40 | { 41 | return minusIdxInTrail(idx, 1); 42 | } 43 | inline uint calcNextIdxInTrail(uint idx) 44 | { 45 | return (idx + 1) % _NodeNumPerTrail; 46 | } 47 | 48 | inline uint calcNodeIdxFromInTrail(uint trailIdx, uint idxInTrail) 49 | { 50 | return trailIdx * _NodeNumPerTrail + idxInTrail; 51 | } 52 | 53 | Node getNode(uint trailIdx, uint idxInTrail, uint totalInputNum) 54 | { 55 | idxInTrail = min(idxInTrail, totalInputNum-1); // 未使用ノードのIdxが指定されたら最新のノードを返す 56 | return _NodeBuffer[calcNodeIdxFromInTrail(trailIdx, idxInTrail)]; 57 | } 58 | 59 | float3 calcNodeDir(uint trailIdx, uint nodeIdxInTrail, uint totalInputNum) 60 | { 61 | float3 dirPrev = float3(0,0,0); 62 | float3 dirNext = float3(0,0,0); 63 | 64 | float3 pos = getNode(trailIdx, nodeIdxInTrail, totalInputNum).pos; 65 | 66 | uint prevIdxInTrail = calcPrevIdxInTrail(nodeIdxInTrail); 67 | uint inputIdxInTrail = calcPrevIdxInTrail(totalInputNum); 68 | 69 | bool prevEnable = (prevIdxInTrail != inputIdxInTrail) && (prevIdxInTrail < totalInputNum); 70 | if ( prevEnable ) 71 | { 72 | dirPrev = normalize(pos - getNode(trailIdx, prevIdxInTrail, totalInputNum).pos); 73 | } 74 | 75 | bool nextEnable = nodeIdxInTrail != inputIdxInTrail; 76 | if ( nextEnable ) 77 | { 78 | uint nextIdxInTrail = calcNextIdxInTrail(nodeIdxInTrail); 79 | dirNext = normalize(getNode(trailIdx, nextIdxInTrail, totalInputNum).pos - pos); 80 | } 81 | 82 | return normalize(dirPrev + dirNext); 83 | } 84 | 85 | 86 | 87 | [numthreads(NUM_THREAD_X,1,1)] 88 | void UpdateVertex(uint3 id : SV_DispatchThreadID) 89 | { 90 | uint trailIdxBufferIdx = id.x; 91 | if ( trailIdxBufferIdx < GetTrailNum() ) 92 | { 93 | uint trailIdx = GetTrailIdx(trailIdxBufferIdx); 94 | 95 | Trail trail = _TrailBuffer[trailIdx]; 96 | uint totalInputNum = trail.totalInputNum; 97 | 98 | //////////////////////////////////////////////////////////// 99 | // Sequence newest node > oldest node 100 | //////////////////////////////////////////////////////////// 101 | uint endNodeIdxInTrail = (totalInputNum - 1) % _NodeNumPerTrail; 102 | uint vertexIdx = (((trailIdxBufferIdx+1) * (_NodeNumPerTrail / _LodNodeStep))-1) * 2; 103 | 104 | Vertex v0 = GetDefaultVertex(); 105 | Vertex v1 = GetDefaultVertex(); 106 | uint count = _NodeNumPerTrail / _LodNodeStep; 107 | for(uint i = 0; i _ArgsBuffer; 150 | 151 | [numthreads(1,1,1)] 152 | void ArgsBufferMultiply() 153 | { 154 | uint v = _ArgsBuffer[1]; 155 | _ArgsBuffer[1] = v * 2; 156 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/Shaders/GpuTrailUpdateVertex.compute.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 365dde5f666348548b6a22b895af03ad 3 | ComputeShaderImporter: 4 | externalObjects: {} 5 | currentAPIMask: 4 6 | preprocessorOverride: 0 7 | userData: 8 | assetBundleName: 9 | assetBundleVariant: 10 | -------------------------------------------------------------------------------- /Packages/GpuTrail/package.json: -------------------------------------------------------------------------------- 1 | { 2 | "name": "ga.fuquna.gputrail", 3 | "displayName": "GpuTrail", 4 | "version": "1.1.1", 5 | "unity": "2021.3", 6 | "keywords": [ 7 | "Gpu", 8 | "ComputeShader", 9 | "Trail" 10 | ], 11 | "author": { 12 | "name": "fuqunaga", 13 | "email": "fukhid@gmail.com", 14 | "url": "https://fuquna.ga" 15 | }, 16 | "type": "library" 17 | } -------------------------------------------------------------------------------- /Packages/GpuTrail/package.json.meta: -------------------------------------------------------------------------------- 1 | fileFormatVersion: 2 2 | guid: 1ed3a6165c61e4842a1a90ae7ea4c3c1 3 | PackageManifestImporter: 4 | externalObjects: {} 5 | userData: 6 | assetBundleName: 7 | assetBundleVariant: 8 | -------------------------------------------------------------------------------- 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-------------------------------------------------------------------------------- 1 | %YAML 1.1 2 | %TAG !u! tag:unity3d.com,2011: 3 | --- !u!890905787 &1 4 | VersionControlSettings: 5 | m_ObjectHideFlags: 0 6 | m_Mode: Visible Meta Files 7 | m_CollabEditorSettings: 8 | inProgressEnabled: 1 9 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # GpuTrail 2 | 3 | ComputeShader implementation trails for Unity 4 | 5 | ![](/Documents/gputrail.webp) 6 | 7 | # Installation 8 | Add the following address to UnityPackageManager. 9 | ``` 10 | https://github.com/fuqunaga/GpuTrail.git?path=/Packages/GpuTrail 11 | ``` 12 | 13 | # Features 14 | 15 | ### View Frustum Culling 16 | ![](/Documents/culling.webp) 17 | 18 | ### LOD 19 | ![](/Documents/lod.webp) 20 | 21 | --------------------------------------------------------------------------------