glDrawElements segfault
Author
glDrawElements crashes with segfault on large vertex/index arrays.
If I have a vertex array of 28000 vertices and the first triangle
indices are 5 7055 20969, I get a segfault.
glEnableClientState(GL_INDEX_ARRAY);
glVertexPointer(4, GL_FLOAT, 0, pvertex);
glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, pindex); // -> crashes here
I tried it with GL1.2 on several video cards, but the result is the same.
However it works fine on with small vertex indices for the first tirangle (e.g 0, 1, 2)
Are there any known limitations of the array/sizes, or index gaps?
Thanks.
Just a guess, try:
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(4, GL_FLOAT, 0, pvertex);
glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, pindex);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(4, GL_FLOAT, 0, pvertex);
glDrawElements(GL_TRIANGLES, 3, GL_UNSIGNED_SHORT, pindex);
Author
Oops, sorry, originally it was GL_VERTEX_ARRAY in the code I try :)
Just a copy/paste error when I typed the post.
Thanks.
Just a copy/paste error when I typed the post.
Thanks.
Author
Looks like it always crashes if the indices of the first triangle are greater than 6518 :(
Are you able to extract coordinates yourself without it crashing?
pvertex[pindex[0]]
pvertex[pindex[1]]
pvertex[pindex[2]]
..
..
pvertex[pindex[0]]
pvertex[pindex[1]]
pvertex[pindex[2]]
..
..
Author
Yes, I am.
Looks like I've got it.
Disabling all other client states helps.
It appears I forgot to disable NORMAL_ARRAY from the previous object.
Thanks.
Looks like I've got it.
Disabling all other client states helps.
It appears I forgot to disable NORMAL_ARRAY from the previous object.
Thanks.
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