glMapBuffer/glUnmapBuffer question

OpenGL OpenGL: Advanced Coding
1

is it possible to do the following?

glbindbuffer(…, vertex_array)
glbufferdata(…,NULL,…)
void *vamapper = glmapbuffer(…)

glbindbuffer(…, texture_array)
glbufferdata(…,NULL,…)
void *tamapper = glmapbuffer(…)

…// copying data into vbo

glunmapbuffer(…)

2

don’t ask, try it out!

3

It is possible. In fact, that’s one of the ways you’re supposed to use VBOs. You also need to glUnmapBuffer the vertex_array before you can use it for rendering. One thing that concerns me is texture_array. I hope that’s any array of texture coordinates and not texture data. VBOs don’t support texture data.