Re: [PyOpenGL-Users] More difficulties with framebuffers

[Christopher B. <Chr...@no...>]

On 12/16/10 3:15 PM, Derakon wrote:
> a microscope slide. These images are tiled in a mosaic viewer, and the
> user can pan and zoom about in the viewer. Once we get a few thousand
> tiles, the viewer starts bogging down because it has to try to draw
> all of those tiles when the user is zoomed out. I want to modify the
> viewer to pre-render the tiles using framebuffers at a low level of
> detail (packing many tiles onto each pre-rendered megatile); then,
> when the user zooms out, I can switch from rendering each tile
> individually to using the pre-rendered megatiles with no apparent loss
> of detail but a reduction in orders of magnitude of the number of
> textures that OpenGL has to deal with.
>
> Unfortunately, I'm running into some scaling and offsetting issues --

Sorry, no time to try to take a look at your code, but we have a similar 
system in maproom, for rending tiles at different zoom levels, maybe it 
will help you figure out your issue:

https://bitbucket.org/dhelfman/maproom/wiki/Home

-Chris


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Chr...@no...