Do you find this site useful? Donations gladly accepted!

These are some early attempts... essentially recreating a PC demo effect from the early 1990s. A shade "bob" (essentially a sprite graphic) bounces around the video area leaving a colourful trail that builds up over time.

Scroll down for some video samples.

• shadebobs.c
  C source code for the first version
  
  
• shadebobsneg.c
  C source code for the negative version

• filled circle
  A simple filled circle, 49x49, 24bpp
  
  
• feather
  A shadebob of feather, 109x150, 24bpp - this one is interesting 'cause the trail isn't entirely uniform
  
  
• pot leaf
  Heh, of course I had to try this with a cannabis leaf, the result was kinda cool actually, 150x150, 24bpp