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Reflection on the performance of some OpenGL operations in the past

2022-04-23 19:13:00 【cjzcjl】

When I did vertex transformation before , It's using CPU After matrix operation （ Object transformation matrix * Camera matrix * Projection matrix ）：

Then send the total transformation matrix to the vertex renderer , The actual vertex of an object times it , You get the final vertex . Then give it to gl_Position Just place the corresponding vertices ：

But today I see LearnOpenGL CN How to deal with , I think it's better to make full use of GPU Performance of ：

The whole matrix multiplication operation is completely completed in the top renderer , Can be more fully utilized GPU Characteristics of . 

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