OpenGL 3/4 glVertexAttribPointer stride and offset miscalculation

Question

I am having a problem getting my vertex array pointed to properly:

const float vertices[] = {
/* position */ 0.75f, 0.75f, 0.0f, 1.0f, /* color */ 1         


        

Answer 1

Stride and offset are specified in bytes. You are using an interleaved vertex array with position and color both as 4 floats. To get from th i-th element in a particular attribute array to the next one, there is the distance of 8 floats, so stride should be 8*sizeof(GLfloat). The offset is the byte position of the first element of each attribute array in the buffer, so in your example for position it is 0, and for color, it is 4*sizeof(GLfloat)