9 replies to this topic

[core114]

when using vertex arrays, the stride value for glColorPointer seems to have NO EFFECT. all the color values are just taken as if the stride was 0. this is a problem as i was trying to have vertex and texture data in the same array. is this actually a bug? is there any way to actually set the stride value for the colorpointer?

[Null and Void]

I''m not sure of exactly what you''re doing, but if you think it''s a bug it would be in your video drivers not in OpenGL.

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[mittens]

OpenGL has no bugs... Only faulty users.

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[core114]

the problem is:

glVertexPointer(3, GL_FLOAT, sizeof(gl_array_data), (GLvoid *)(&draw_map_array[0].vertex[0]));
glColorPointer(3, GL_FLOAT, sizeof(gl_array_data), (GLvoid *)(&draw_map_array[0].color[0]));
glTexCoordPointer(2, GL_FLOAT, sizeof(gl_array_data), (GLvoid *)(&draw_map_array[0].texcoord[0]));

now if you look at them they all seem basicly the same.
however, the 3rd value for glColorPointer has NO effect whatsoever. the rest work fine.

i am using the standard .h and .lib files that come from opengl.org

i'm not a faulty user, if you must see more code...

struct gl_array_data
{
float vertex[3];
float color[3];
float texcoord[2];
};

gl_array_data draw_map_array[MAPX*2+16];

and yes i did enable the stuff, and the other two pointers work fine.

also, OpenGL does have known bugs.

Edited by - core114 on August 3, 2001 11:07:26 PM

Edited by - core114 on August 3, 2001 11:10:09 PM

[Null and Void]

Well, if you''re convinced it''s a bug (I''m not an expert on the stuff you''re using, so I can''t say if you''re using it incorrectly or anything off the top of my head) try to use it on someone else''s computer. The more different their machine is, the better.

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[zedzeek]

do u have lighting enabled?
also does it work correctly when u dont use interleaved arrays?

[core114]

i don''t have lighting enabled,
it does exactly the same thing when i use interleaved arrays.

on another computer, it worked exactly as it should...
perhaps i just have some awful opengl drivers

now this just leavs me wondering if there is a simple way to test if drivers do what they are supposed to, is there some utility to do test them?

[Null and Void]

Not that I know of. The only way I''ve found of testing the drivers is by trying your program on a computer with different ones (which normally implies a different video card, but not always).

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