Idle question about Scaling Textures:

Galaxy_Stranger · Post by **Galaxy_Stranger** » Tue Nov 23, 2004 5:10 pm

Does it take any more processing power to scale a texture? I know that a few don't make any difference in-game, but if you did it for, maybe 90% of all your textures and sprites, does that hurt performance? Or does it have to calculate that value anyway, and so all you're doing is changing that number?

wildweasel · Post by **wildweasel** » Tue Nov 23, 2004 5:17 pm

As far as I know, all it takes is the extra memory to keep the texture loaded. But I may be wrong, considering that I'm not as in-depth with the source code (let alone have I ever opened a single source file).

Post by **Graf Zahl** » Tue Nov 23, 2004 5:30 pm

In-game it won't make any difference (if you disregard CPU cache performance.) To map a texture onto a wall the renderer has to step through the entire texture and make its calculations for each pixel to be rendered. The only difference between an unscaled and a scaled texture is the stepping factor which is proportional to the size of the texture