Exercise: interleaved attributes confusion #91

Had some trouble with this one too, here's what I understood:

[
  startx0, starty0, endx0, endy0, // vertex 0
  startx1, starty1, endx1, endy1, // vertex 1
  startx2, starty2, endx2, endy2, // vertex 2
  ...
]

stride is the BYTES_PER_ELEMENT * < number of elements per row >
There are 4 floats between startx0 and startx1, so the stride is 4 * 4 = 16;

offset is BYTES_PER_ELEMENT * < number of elements before the value >
there are 2 elements before endx0, so the offset is 4 * 2 = 8.

Hopefully this is correct and is helpful ✌️