[ quesa-Bugs-1227484 ] Add support for OpenGL display lists

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Bugs item #1227484, was opened at 2005-06-25 14:50
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Michael Sullivan (imikey)
Assigned to: Nobody/Anonymous (nobody)
Summary: Add support for OpenGL display lists

Initial Comment:
Was discussed on the list with the following thoughts:

*****

James W. Walker wrote:

 > Yes, but if someone is updating a trimesh every frame (which 
isn"t  
 > an unreasonable expectation) you"ll be compiling a new display 
list  
 > every frame, which will certainly be slower than using the 
current  
 > vertex array path.
 
 I suppose some might do that, but it would not be a concern in 
my use  
 of Quesa.
 
 > To use display lists to their potential you need a geometry type  
 > that"s guaranteed never to change, or some sort of flag for  
 > existing geometries that allows you to declare them as "static"  
 > once their data is set.
 
 It would be easy enough to use an object property as a flag.

*****

Mikey wrote:

 >  To use display lists to their potential you need a
 >  geometry type that"s guaranteed never to change, or some 
sort of flag
 >  for existing geometries that allows you to declare them as 
"static"
 >  once their data is set.
 
 I would think that scenery such as ground terrain, trees, etc. 
would  
 be ideal for using this "static" flag and thus become eligible for  
 storage in display lists.  Furthermore, if all such objects had  
 normals computed for them, then perhaps OpenGL"s built-in 
backface  
 culling could be used when drawing them.


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