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NOAH IV
09-02-2002, 10:11 AM
Hi there,

In order to change the LOD using different textures should I use the OpenGL mipmapping features or should I implement my own system to change the textures according to the distance of the viewer?

Does anybody bechmarked this feature? Is it fast enough or does it worth the work of implementing my own approach?

Thanks a lot.

Robbo
09-02-2002, 10:52 AM
Depends what you mean. I think the glu function uses a simple box-map to generate the texture levels. Sure, you could probably write and optimise a quicker\better version, but glu is generally good enough.

Oh and if I think I read you correctly, your LOD level for tmapping is something you don't have to worry about at all if you are using mip-maps (texture levels with OpenGL) - you won't get shimmering etc. if you are using GL_LINEAR_MIPMAP_LINEAR etc.


[This message has been edited by Robbo (edited 09-02-2002).]

Leyder Dylan
09-02-2002, 11:23 AM
Use mipmapping with "GL_SGIS_generate_mipmap" extension.

It's +- 30% more faster than the classic mipmapping.