My question is about GLSL language. When I run a for loop in a vertex shader, is the loop executed sequentially or in parallel on the GPU?
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My question is about GLSL language. When I run a for loop in a vertex shader, is the loop executed sequentially or in parallel on the GPU?
No single invocation of a shader is executed “in parallel”. Different invocations of the same shader (for example, the same vertex shader but given two different input values from two different vertices) are executed in parallel, but every shader acts sequentially (or if it doesn’t, it must behave as if it acts sequentially, which is the same thing).