
Technical Q&A's
QD3D 06 - QuickDraw 3D Projection Chain (1-June-95)
Q The documentation states that the Q3View_GetFrustrumToWindowMatrixState can
only be called between StartRendering and EndRendering. While this makes sense
for the Q3View_GetLocalToWorldMatrixState routine, why should it apply to the
others? We've set up a dummy rendering loop to call these routines, but it
seems a waste. Also, the names for these routines seem wrong, since they get
the matrix, not the state of the matrix.
A The reason for the restriction is that, in future versions, we may provide the
ability to transform the camera within the rendering loop. We chose to name them
the way we did because you are getting the state [[arrowhorizex]] i.e.,
whatever the matrix is at the time.
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