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113 lines
3.7 KiB
JavaScript
113 lines
3.7 KiB
JavaScript
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#pragma strict
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@script ExecuteInEditMode
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@script RequireComponent (Camera)
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@script AddComponentMenu ("Image Effects/Noise And Grain (Overlay)")
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class NoiseAndGrain extends PostEffectsBase {
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public var strength : float = 1.0f;
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public var blackIntensity : float = 1.0f;
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public var whiteIntensity : float = 1.0f;
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public var redChannelNoise : float = 0.975f;
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public var greenChannelNoise : float = 0.875f;
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public var blueChannelNoise : float = 1.2f;
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public var redChannelTiling : float = 24.0f;
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public var greenChannelTiling : float = 28.0f;
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public var blueChannelTiling : float = 34.0f;
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public var filterMode : FilterMode = FilterMode.Bilinear;
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public var noiseShader : Shader;
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public var noiseTexture : Texture2D;
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private var noiseMaterial : Material = null;
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function OnDisable()
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{
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if (noiseMaterial)
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DestroyImmediate(noiseMaterial);
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}
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function CheckResources () : boolean {
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CheckSupport (false);
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noiseMaterial = CheckShaderAndCreateMaterial (noiseShader, noiseMaterial);
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if(!isSupported)
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ReportAutoDisable ();
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return isSupported;
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}
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function OnRenderImage (source : RenderTexture, destination : RenderTexture) {
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if(CheckResources()==false) {
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Graphics.Blit (source, destination);
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return;
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}
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noiseMaterial.SetVector ("_NoisePerChannel", Vector3(redChannelNoise, greenChannelNoise, blueChannelNoise));
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noiseMaterial.SetVector ("_NoiseTilingPerChannel", Vector3(redChannelTiling, greenChannelTiling, blueChannelTiling));
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noiseMaterial.SetVector ("_NoiseAmount", Vector3(strength, blackIntensity, whiteIntensity));
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noiseMaterial.SetTexture ("_NoiseTex", noiseTexture);
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noiseTexture.filterMode = filterMode;
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DrawNoiseQuadGrid (source, destination, noiseMaterial, noiseTexture, 0);
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}
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static function DrawNoiseQuadGrid (source : RenderTexture, dest : RenderTexture, fxMaterial : Material, noise : Texture2D, passNr : int) {
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RenderTexture.active = dest;
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var noiseSize : float = (noise.width * 1.0f);
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var tileSize : float = noiseSize;
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var subDs : float = (1.0f * source.width) / tileSize;
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fxMaterial.SetTexture ("_MainTex", source);
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GL.PushMatrix ();
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GL.LoadOrtho ();
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var aspectCorrection : float = (1.0f * source.width) / (1.0f * source.height);
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var stepSizeX : float = 1.0f / subDs;
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var stepSizeY : float = stepSizeX * aspectCorrection;
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var texTile : float = tileSize / (noise.width * 1.0f);
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fxMaterial.SetPass (passNr);
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GL.Begin (GL.QUADS);
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for (var x1 : float = 0.0; x1 < 1.0; x1 += stepSizeX) {
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for (var y1 : float = 0.0; y1 < 1.0; y1 += stepSizeY) {
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var tcXStart : float = Random.Range (0.0f, 1.0f);
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var tcYStart : float = Random.Range (0.0f, 1.0f);
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tcXStart = Mathf.Floor(tcXStart*noiseSize) / noiseSize;
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tcYStart = Mathf.Floor(tcYStart*noiseSize) / noiseSize;
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//var texTileMod : float = Mathf.Sign (Random.Range (-1.0f, 1.0f));
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var texTileMod : float = 1.0f / noiseSize;
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GL.MultiTexCoord2 (0, tcXStart, tcYStart);
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GL.MultiTexCoord2 (1, 0.0f, 0.0f);
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GL.Vertex3 (x1, y1, 0.1);
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GL.MultiTexCoord2 (0, tcXStart + texTile * texTileMod, tcYStart);
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GL.MultiTexCoord2 (1, 1.0f, 0.0f);
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GL.Vertex3 (x1 + stepSizeX, y1, 0.1);
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GL.MultiTexCoord2 (0, tcXStart + texTile * texTileMod, tcYStart + texTile * texTileMod);
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GL.MultiTexCoord2 (1, 1.0f, 1.0f);
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GL.Vertex3 (x1 + stepSizeX, y1 + stepSizeY, 0.1);
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GL.MultiTexCoord2 (0, tcXStart, tcYStart + texTile * texTileMod);
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GL.MultiTexCoord2 (1, 0.0f, 1.0f);
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GL.Vertex3 (x1, y1 + stepSizeY, 0.1);
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}
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}
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GL.End ();
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GL.PopMatrix ();
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}
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} |