├── Preview_image.gif
├── README.md
└── paralaxNode.cs


/Preview_image.gif:
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https://raw.githubusercontent.com/anaseinea/Parallax-Mapping-Node-Unity/HEAD/Preview_image.gif


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/README.md:
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1 | # Parallax-Mapping-in-Unity-Shader-Graph
2 | 
3 | Node code used in the [Tutorial](https://youtu.be/LKhGqKYOmbo)
4 | 
5 | [My Material Pack](https://www.assetstore.unity3d.com/#!/content/136692)
6 | 
7 | ![Screenshot](http://anaseinea.github.io/Parallax-Mapping-Node-Unity/Preview_image.gif)
8 | 


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/paralaxNode.cs:
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 1 | using UnityEngine;
 2 | using UnityEditor.ShaderGraph;
 3 | using System.Reflection;
 4 | [Title("Custom", "paralax")]
 5 | 	public class ParalaxNode : CodeFunctionNode
 6 | {
 7 | 	public ParalaxNode()
 8 | 	{
 9 | 		name = "paralax";
10 | 	}
11 | 
12 | 	protected override MethodInfo GetFunctionToConvert()
13 | 	{
14 | 		return GetType().GetMethod("MyCustomFunction",
15 | 			BindingFlags.Static | BindingFlags.NonPublic);
16 | 	}
17 | 	static string MyCustomFunction(
18 | 		[Slot(0, Binding.None)] Vector1 heightScale,
19 | 		[Slot(1, Binding.TangentSpaceViewDirection)] Vector3 viewDir,
20 |     [Slot(2, Binding.None)] Texture2D HeightTex,
21 | 		[Slot(3, Binding.MeshUV0)] Vector2 uv,
22 |     [Slot(4, Binding.None)] SamplerState sampleState,
23 | 		[Slot(5, Binding.None)] out Vector2 Out)
24 | 
25 | 	{
26 | 		Out = uv; 
27 | 		return
28 | 			@"
29 | {
30 |   // determine required number of layers
31 |   const float minLayers = 30;
32 |   const float maxLayers = 60;
33 |   float numLayers = lerp(maxLayers, minLayers, abs(dot(float3(0, 0, 1), viewDir)));
34 | 
35 |   float numSteps = numLayers;//60.0f; // How many steps the UV ray tracing should take
36 |   float height = 1.0;
37 |   float step = 1.0 / numSteps;
38 |   
39 |   float2 offset = uv.xy;
40 |   float4 HeightMap = HeightTex.Sample(sampleState, offset);
41 |   
42 |   float2 delta = viewDir.xy * heightScale / (viewDir.z * numSteps);
43 |   
44 |   // find UV offset
45 |   for (float i = 0.0f; i < numSteps; i++) {
46 |     if (HeightMap.r < height) {
47 |       height -= step;
48 |       offset += delta;
49 |       HeightMap = HeightTex.Sample(sampleState, offset);
50 |     } else {
51 |       break;
52 |     }
53 |   }
54 |   Out = offset;
55 | }  
56 | ";
57 | 	}
58 | 
59 | 
60 | }


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