问题
I have this, wich will read in vec2, is it possible to forward just one, so the vertex shader will recieve in each 0,1 then 1,2 2,3 and so on?
float v[]{0,1,2,3,4...};
glVertexAttribPointer((GLuint)0, 2, GL_FLOAT, GL_FALSE, 0, 0);
回答1:
This feels like a hack, but you could explicitely set the stride parameter of glVertexAttribPointer to the size of a single float.
Basically, whenever the GL fetches a vertex with index i, it will use the address offset + i * stride. The 0 you are using currently as stride parameter is a convenience shortcut meaning a tightly packed array, so it will be equivalent to 2 * sizeof(GLfloat) in your case, but there is nothing in the GL which prevents you from setting a stride below that value of a tightly packed array:
glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(GLfloat), 0);
来源：https://stackoverflow.com/questions/36229863/glvertexattribpointer-vec2-but-forward-just-one