Michael Jones (mtj++at++babar)
Fri, 28 Oct 1994 16:03:29 -0700
:Why does Performer apply (download) textures if the subsequent
:geometry (even the global state) is in wireframe? No that this is
:really a big issue here, but I am curious.
Because textured wireframe rendering is a valid thing to do. It's
also reasonable to texture points.
In fact, one way to implement high-performance range attenuated
light points is to use texgen() based on distance from the eye and
a 1-dimensional texture that modulates intensity or transparency.
If you want non-textured rendering of things defined as being
textured, disable texturing in the global state and override
any changes by locking the texture-enable bit.
If I were designing an interactive application that had a special
wire-frame draw mode, I'd probably disable and override both texture
and lighting in the global state.
--Be seeing you, Phone:415.390.1455 Fax:415.390.2658 M/S:8U-590 Michael T. Jones Silicon Graphics, Advanced Graphics Division mtj++at++sgi.com 2011 N. Shoreline Blvd., Mtn. View, CA 94039-7311
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