Bitmap loop sprites

Open the gamedefender3d.cpp file and comment in this line //#define LOOPEXPLOSION

Also search down for LOOPEXPLOSION and take a look at the code to see what you're commenting in. Then recompile and shoot some props and see what happens. You get a nice cSpriteLoop that flips through three bitmaps.

Also watch what happens to your updates per second in the status bar when you shoot something. To check if this is due to the bitmaps or to the cascade of prop fragments, you can comment the LOOPEXPLOSION back out, run it again, shoot something and watch the updates per second.

It turns out that, at least the way the Pop Framework currently implements them, bitmap sprites are a little slow in the OpenGL graphics. The slowdown for bitmaps in the Pop Framework is especially strong if the bitmaps happen to be close to the viewer and take up a lot of the screen.