1 using System;
2 using UnityEngine;
3
4 namespace UnityStandardAssets.ImageEffects
5 {
6 [ExecuteInEditMode]
7 [RequireComponent (typeof(Camera))]
8 [AddComponentMenu ("Image Effects/Edge Detection/Crease Shading")]
9 public class CreaseShading : PostEffectsBase
10 {
11 public float intensity = 0.5f;
12 public int softness = 1;
13 public float spread = 1.0f;
14
15 public Shader blurShader = null;
16 private Material blurMaterial = null;
17
18 public Shader depthFetchShader = null;
19 private Material depthFetchMaterial = null;
20
21 public Shader creaseApplyShader = null;
22 private Material creaseApplyMaterial = null;
23
24
25 public override bool CheckResources ()
26 {
27 CheckSupport (true);
28
29 blurMaterial = CheckShaderAndCreateMaterial (blurShader, blurMaterial);
30 depthFetchMaterial = CheckShaderAndCreateMaterial (depthFetchShader, depthFetchMaterial);
31 creaseApplyMaterial = CheckShaderAndCreateMaterial (creaseApplyShader, creaseApplyMaterial);
32
33 if (!isSupported)
34 ReportAutoDisable ();
35 return isSupported;
36 }
37
38 void OnRenderImage (RenderTexture source, RenderTexture destination)
39 {
40 if (CheckResources()==false)
41 {
42 Graphics.Blit (source, destination);
43 return;
44 }
45
46 int rtW = source.width;
47 int rtH = source.height;
48
49 float widthOverHeight = (1.0f * rtW) / (1.0f * rtH);
50 float oneOverBaseSize = 1.0f / 512.0f;
51
52 RenderTexture hrTex = RenderTexture.GetTemporary (rtW, rtH, 0);
53 RenderTexture lrTex1 = RenderTexture.GetTemporary (rtW/2, rtH/2, 0);
54
55 Graphics.Blit (source,hrTex, depthFetchMaterial);
56 Graphics.Blit (hrTex, lrTex1);
57
58 for(int i = 0; i < softness; i++)
59 {
60 RenderTexture lrTex2 = RenderTexture.GetTemporary (rtW/2, rtH/2, 0);
61 blurMaterial.SetVector ("offsets", new Vector4 (0.0f, spread * oneOverBaseSize, 0.0f, 0.0f));
62 Graphics.Blit (lrTex1, lrTex2, blurMaterial);
63 RenderTexture.ReleaseTemporary (lrTex1);
64 lrTex1 = lrTex2;
65
66 lrTex2 = RenderTexture.GetTemporary (rtW/2, rtH/2, 0);
67 blurMaterial.SetVector ("offsets", new Vector4 (spread * oneOverBaseSize / widthOverHeight, 0.0f, 0.0f, 0.0f));
68 Graphics.Blit (lrTex1, lrTex2, blurMaterial);
69 RenderTexture.ReleaseTemporary (lrTex1);
70 lrTex1 = lrTex2;
71 }
72
73 creaseApplyMaterial.SetTexture ("_HrDepthTex", hrTex);
74 creaseApplyMaterial.SetTexture ("_LrDepthTex", lrTex1);
75 creaseApplyMaterial.SetFloat ("intensity", intensity);
76 Graphics.Blit (source,destination, creaseApplyMaterial);
77
78 RenderTexture.ReleaseTemporary (hrTex);
79 RenderTexture.ReleaseTemporary (lrTex1);
80 }
81 }
82 }
