/[gzz]/gzz/doc/pegboard/1013/PEG_1013.rst
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revision 1.4 by benja, Sun Nov 24 14:08:36 2002 UTC revision 1.5 by tjl, Sat Dec 14 08:11:33 2002 UTC
# Line 76  Issues Line 76  Issues
76    results in less changes to the architecture. There will be    results in less changes to the architecture. There will be
77    ``clipRect()`` and ``unclip()`` methods with the same signature    ``clipRect()`` and ``unclip()`` methods with the same signature
78    in ``VobCoorder``.    in ``VobCoorder``.
79    
80    - VobCoorder doesn't know which VobScene it is in, or which VobMap
81      it's using. This makes it impossible to implement this functionality
82      for OpenGL changing only GLVobCoorder, since the OpenGL state is altered
83      by placing a new Vob in the VobMap.
84    
85    - How deep a stack is allowed / required? This makes a lot of difference
86      for the OpenGL implementation which has native stacks of fixed depth.
87    
88    - Should clipping with this method work with nonlinear coordinate systems?
89      This is a very fundamental issue for OpenGL, since if the answer is no,
90      we can use clip planes and get rid of much unwanted geometry, getting
91      better performance; otherwise, we need to use stencil and draw everything.

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