Problem with VBO

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Hi all,

I have an application which is using one single VBO for several objects.
Its rendering loop looks like: (don't have the source of the app, got that
from the print SPU)

BindBufferARB( GL_ARRAY_BUFFER, 1 )
BindBufferARB( GL_ELEMENT_ARRAY_BUFFER, 2 )
VertexPointer( 3, GL_FLOAT, 32, 00000000 )
DrawElements...
...
VertexPointer( 3, GL_FLOAT, 32, 00000FA0 )
DrawElements...
...
VertexPointer( 3, GL_FLOAT, 32, 000113C0 )
DrawElements...

but on th crserver, the print SPU gives something like:
BindBufferARB( GL_ARRAY_BUFFER, 1 )
BindBufferARB( GL_ELEMENT_ARRAY_BUFFER, 2 )
VertexPointer( 3, GL_FLOAT, 32, 00000000 )
DrawElements...
...
DrawElements...
...
DrawElements...

And the visual result is wrong.
I looked a bit in chromium sources, and it came down to the
crStateClientDiff function in state_client.c.
The two CRClientState pointers "to" and "from" where the same, so the tests
on change of size, type etc never passed.
I just commented these tests and now the app works nicely, but maybe it
breaks something else somewhere!

Regards,
Thomas

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Hi all,<br>
<br>
I have an application which is using one single VBO for several objects.<br>
Its rendering loop looks like: (don&#39;t have the source of the app, got that from the print SPU)<br>
<br>
BindBufferARB( GL_ARRAY_BUFFER, 1 )<br>
BindBufferARB( GL_ELEMENT_ARRAY_BUFFER, 2 )<br>
VertexPointer( 3, GL_FLOAT, 32, 00000000 )<br>
DrawElements...<br>
...<br>
VertexPointer( 3, GL_FLOAT, 32, 00000FA0 )<br>
DrawElements...<br>
...<br>
VertexPointer( 3, GL_FLOAT, 32, 000113C0 )<br>
DrawElements...<br>
<br>
but on th crserver, the print SPU gives something like:<br>
BindBufferARB( GL_ARRAY_BUFFER, 1 )<br>

BindBufferARB( GL_ELEMENT_ARRAY_BUFFER, 2 )<br>

VertexPointer( 3, GL_FLOAT, 32, 00000000 )<br>

DrawElements...<br>

...<br>
DrawElements...<br>

...<br>
DrawElements...<br>
<br>
And the visual result is wrong.<br>
I looked a bit in chromium sources, and it came down to the crStateClientDiff function in state_client.c.<br>
The two CRClientState pointers &quot;to&quot; and &quot;from&quot; where the same, so the tests on change of size, type etc never passed.<br>
I just commented these tests and now the app works nicely, but maybe it breaks something else somewhere!<br>
<br>
Regards,<br>
Thomas<br>
<br>
<br>

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