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並前往https://webgl2fundamentals.org/webgl/lessons/webgl-qna-how-to-use-textures-as-data.html

How to use textures as data - WebGL2 Fundamentals

ivec2 pixelCoord = ivec2(x, y);; int mipLevel = 0;; vec4 pixelValue = texelFetch(someSamplerUniform, texcoord, mipLevel);. A working example of using ...

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