├── README.md
├── ScanlinesEffect.cs
└── ScanlinesEffect.shader


/README.md:
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 1 | *Scanlines image effect for Unity*
 2 | 
 3 | How to use:
 4 | 
 5 | -Attach the ScanlinesEffect script to your camera. 
 6 | 
 7 | -Set the ScanlinesEffect shader in the shader property.
 8 | 
 9 | -Tweak values.
10 | 


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/ScanlinesEffect.cs:
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 1 | using System;
 2 | using UnityEngine;
 3 | 
 4 | [ExecuteInEditMode]
 5 | [RequireComponent(typeof(Camera))]
 6 | [AddComponentMenu("Image Effects/Camera/Scanlines Effect")]
 7 | public class ScanlinesEffect : MonoBehaviour {
 8 |   public Shader shader;
 9 |   private Material _material;
10 | 
11 |   [Range(0, 10)]
12 |   public float lineWidth = 2f;
13 | 
14 |   [Range(0, 1)]
15 |   public float hardness = 0.9f;
16 | 
17 |   [Range(0, 1)]
18 |   public float displacementSpeed = 0.1f;
19 | 
20 |   protected Material material {
21 |     get {
22 |       if (_material == null) {
23 |         _material = new Material(shader);
24 |         _material.hideFlags = HideFlags.HideAndDontSave;
25 |       }
26 |       return _material;
27 |     }
28 |   }
29 | 
30 |   private void OnRenderImage(RenderTexture source, RenderTexture destination) {
31 |     if (shader == null)
32 |       return;
33 |     material.SetFloat("_LineWidth", lineWidth);
34 |     material.SetFloat("_Hardness", hardness);
35 |     material.SetFloat("_Speed", displacementSpeed);
36 |     Graphics.Blit(source, destination, material, 0);
37 |   }
38 | 
39 |   void OnDisable() {
40 |     if (_material) {
41 |       DestroyImmediate(_material);
42 |     }
43 |   }
44 | }


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/ScanlinesEffect.shader:
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 1 | Shader "Custom/Scanlines" {
 2 | 
 3 |      Properties {
 4 |          _MainTex("_Color", 2D) = "white" {}
 5 |          _LineWidth("Line Width", Float) = 4
 6 |          _Hardness("Hardness", Float) = 0.9
 7 |          _Speed("Displacement Speed", Range(0,1)) = 0.1
 8 |      }
 9 |  
10 |      SubShader {
11 | 
12 |          Tags {"IgnoreProjector" = "True" "Queue" = "Overlay"} 
13 | 
14 |          Pass {
15 |          	ZTest Always 
16 |          	Cull Off 
17 |          	ZWrite Off 
18 | 
19 |          	Fog{ Mode off }
20 |  
21 |          CGPROGRAM
22 |  
23 |  		 #pragma vertex vert
24 |  		 #pragma fragment frag
25 |  		 #pragma fragmentoption ARB_precision_hint_fastest
26 |  		 #include "UnityCG.cginc"
27 |  		 #pragma target 3.0
28 |  
29 | 	     struct v2f {
30 | 	         float4 pos      : POSITION;
31 | 	         float2 uv       : TEXCOORD0;
32 | 	         float4 scr_pos : TEXCOORD1;
33 | 	     };
34 | 	 
35 | 	     uniform sampler2D _MainTex;
36 | 	     uniform float _LineWidth;
37 | 	     uniform float _Hardness;
38 | 	     uniform float _Speed;
39 | 	 
40 | 	     v2f vert(appdata_img v) {
41 | 	         v2f o;
42 | 	         o.pos = UnityObjectToClipPos(v.vertex);
43 | 	         o.uv = MultiplyUV(UNITY_MATRIX_TEXTURE0, v.texcoord);
44 | 	         o.scr_pos = ComputeScreenPos(o.pos);
45 | 	         
46 | 	         return o;
47 | 	     }
48 | 	 
49 | 	     half4 frag(v2f i) : COLOR {
50 | 	         half4 color = tex2D(_MainTex, i.uv);
51 | 	         fixed lineSize = _ScreenParams.y*0.005;
52 | 	         float displacement = ((_Time.y*1000)*_Speed)%_ScreenParams.y;
53 | 	         float ps = displacement+(i.scr_pos.y * _ScreenParams.y / i.scr_pos.w);
54 | 
55 | 	         return ((int)(ps / floor(_LineWidth*lineSize)) % 2 == 0) ? color : color * float4(_Hardness,_Hardness,_Hardness,1);
56 | 	     }
57 | 	 
58 | 	     ENDCG
59 | 	     }
60 |      }
61 |      FallBack "Diffuse"
62 |  }


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