Hello,

I've been trying to writer a height map loader, the data on the GPU side appear to be fine. but when I render with GL_POINTS, I only get one pixel in the center of the screen. GL_TRIANGLE_STRIP doesn't show anything.

Here's a folder containing pictures of the callstack, vertex data, shaders, element data and the result on screen.

https://www.dropbox.com/sh/obndxcase6hzh22/AADV92E5HEGa6Xbo7OIzYfusa?dl=0

The only difference is I've since removed the projection and model matrix to reduce the scope of the problem.

Well the mesh data is between 0 and 1, so I thought without any projection it should all be in the top right of the screen.

I change it to 1, 1, 1 for the color and it's still just the same pixel, good point though.

The viewport origin is at the center of the screen, which is probably why your vertex or vertices are drawn there. Sounds like you have zero values there.. Could you take a look at your buffer, if its really correct?

I followed the buffer and the first row is correct, but beyond those 8 elements, it's wrong. I'm going to redo the whole thing, but technically that first strip should of still displayed?

Note also that your vertex buffer has 16 verts [0-15], but index buffer refers 16's vertex, which is beyond buffer limits.