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OpenGL question on select model

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sunrisefe    102
i am a newer to opengl,thanks for your reply. is the following array selectBuf is the names stack? when we use glPushName()or glLoadName() ,how the names stack and the array selectBuf change? thank you very much. ***************************************** GLuint selectBuf[BUFSIZE]; glSelectBuffer (BUFSIZE, selectBuf); ******************************************

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bene81    138
Yes any primitives rendered in the viewport with a name attached generate a hit.

The selection buffer is then a list of such hits with the following structure:

hitcount[32] minz[32] maxz[32] name0 name1 ... name[hitcount]

if hitcount is 0, the selection buffer looks like
0 minz maxz

you can have several names for a hit with hierarchical picking (multiple glPushname)
e.g. 2 minz maxz objectname detailofobect

This is a gut tutor:

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bene81    138

and check out

and disable many stuff you dont need for picking,


You can use push/pop attribs to restore.

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