Hi all,
are there any restrictions of passing manual managed memory blocks along to glVertexPointer or glTexCoordPointer?
My Problem is that my system totally freezes when I try to pass vertices to the subsystem that are created with malloc(). as soon as glDrawArrays() is called there is a hard freeze.
example:
float* vtx = malloc(34sizeof(float)); // 4 vertices, xyz each
// fill vertices…
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT , 0, vtx);
glDrawArrays(GL_QUADS, 0, 4);
…
above code locks up my machine. The following code however works fine:
float vtx[12]; // 4 vertices, xyz each
// fill vertices…
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT , 0, vtx);
glDrawArrays(GL_QUADS, 0, 4);
…
The only difference is the way of allocating the vertex memory. Is there any restriction, perhaps byte alignment, AMD64 compliant pointer issue or whatever? I have a AMD64 Linux system with a Geforce 9600M GT with drivers 195.xxx.
Using VBOs also solves the problem but since I have only some quads to draw I would like to keep the vertex buffer on my client side.
Any Ideas? I’m completely out of clues 
Best
Saski