59 lines
1.5 KiB
Plaintext
59 lines
1.5 KiB
Plaintext
//高斯模糊2
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CCEffect %{
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techniques:
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- passes:
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- vert: vs
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frag: fs
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blendState:
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targets:
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- blend: true
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rasterizerState:
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cullMode: none
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properties:
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texture: { value: white }
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u_resolution: { value: [1280,720] }
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}%
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CCProgram vs %{
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#include <cc-global>
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precision highp float; // 定义float高精度
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in vec3 a_position; // 顶点Shader 从渲染管道里面获取的顶点信息,使用attribute来修饰;
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in vec2 a_uv0; // 纹理坐标;
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out vec2 uv0; // 传递给着色Shader，varying 来修饰，进行插值
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void main () {
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vec4 pos = cc_matViewProj * vec4(a_position, 1);
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gl_Position = pos;
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uv0 = a_uv0;
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}
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}%
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CCProgram fs %{
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precision mediump float;
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in vec2 uv0;
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uniform sampler2D texture;
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uniform ARGS {
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vec2 u_resolution;
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float strength;
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};
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const float blurRadius = 7.0;
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void main()
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{
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vec2 unit = 1.0 / u_resolution; //单位坐标
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vec3 sumColor = vec3(0.0, 0.0, 0.0);
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float count = 0.0;
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vec4 col = vec4(0.0);
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for(float fy = -blurRadius; fy <= blurRadius; ++fy)
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{
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for(float fx = -blurRadius; fx <= blurRadius; ++fx)
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{
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float weight = (blurRadius - abs(fx)) * (blurRadius - abs(fy)); //权重，p点的权重最高，向四周依次减少
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col += texture2D(texture, uv0 + vec2(fx * unit.x, fy * unit.y)) * weight;
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count += weight;
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}
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}
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col.a = texture2D(texture, uv0).a;
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gl_FragColor = vec4(col.rgb / count, col.a);
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}
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}%
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