» cn.Tutorial Effects - Pixelshader Preparations
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cn.Tutorial Effects - Pixelshader Preparations

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TOC: Of Effects and Shaders
Next: Manipulating Colors

对于像素着色的案例我们都使用的是同一个基础的程序片,它由一个2x2的 Grid (EX9.Geometry)和一个连接在effect上的FileTexture (EX9.Texture)构成,renderers 节点的View Transform引脚缩放值设置为2,使得grid网格能够充满整个窗口:

替换程序片中的Template节点,按照EX9.Effect.Template 这个页面中的说明,我们通常是先复制一个新的Template节点。把这个重新复制的节点连接到程序片当中去,然后通过右键单击这个节点打开编码器。用下面的代码替换替换templates中已有的代码,因为这个代码十分简单,以至于我们不需要去考虑暂时我们不需要用到的顶点着色的部分。

texture Tex <string uiname="Texture";>;
sampler Samp = sampler_state    //sampler for doing the texture-lookup
    Texture   = (Tex);          //apply a texture to the sampler
    MipFilter = LINEAR;         //sampler states
    MinFilter = LINEAR;
    MagFilter = LINEAR;
//the data structure: "vertexshader to pixelshader"
//used as output data with the VS function
//and as input data with the PS function
struct vs2ps
    float4 Pos  : POSITION;
    float2 TexCd : TEXCOORD0;
float4 PS(vs2ps In): COLOR
    return 1;
technique TSimpleShader
    pass P0
        VertexShader = null;
        PixelShader  = compile ps_2_0 PS();


Next: Manipulating Colors
TOC: Of Effects and Shaders

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