From: Angus Dorbie (dorbie++at++sgi.com)
Date: 10/08/2000 20:16:12
The progressive loading in OpenGL 1.1 is just glTexSubImage2D
To do something like clip texturing, or even to exploit clip texture
capability where you have it requires quite complex and sophisticated
software to manage a texture database from disk to system memory and on
to graphics hardware. Even the requisite tweaks to graphics hardware
only make this a more elegant scheme, you still need good software. If
you want to do this in OpenGL yourself you'll have to create a database
of the right structure, load files from that database to memory based on
the paging requirement and download that to texture memory in a tightly
controlled way if you want anything close to good performance.
CHeers,Angus.
> Hui Li wrote:
>
> This is acurally an openGL question
>
> My application on PC using Opengl need serf large terrian with
> huge amount of texture, Cliptexture on Performer could do it
>
> but with openGL what should i do, i heard that with OpenGL1.1 or
> higher, it support progressive texture loading, can any body give
> me more clue?
>
> Hui
-- For Performer+OpenGL tutorials http://www.dorbie.com/"In the middle of difficulty lies opportunity." --Albert Einstein
This archive was generated by hypermail 2b29 : Sun Oct 08 2000 - 20:16:30 PDT