On Wednesday 18 June 2008 17:31:32 Peter Clifton wrote:
> Peter B pointed out that if those vertex lists could be cached for
> layers which aren't being modified during rubber-banding etc.., we could
> make it faster still.
Yep. I was reading a game development blog recently, and some guy was waxing
lyrical about the ability to do that -- basically, setting up a static vertex
list and storing it *in the graphics card*. Then instead of even having to
just send a vertex list on each redraw, you just say "draw stored list
<number>", freeing up CPU/memory bus for other tasks.
The other think that (might) work would be rendering inactive layers to
textures and then compositing them. The only disadvantage with this is you
need lots of graphics memory and that zoom would be dog slow; everything else
would be faster.
Peter
--
Peter Brett
Electronic Systems Engineer
Integral Informatics Ltd
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