Spot Lighting
Dave Bollinger, Dec 2006
http://www.davebollinger.com
for Processing 0123 Beta

Quick & Dirty Spot Lighting

Move mouse to change light position

The effect is similar to additive blending, but is actually multiplicative,
so doesn't tend to whitewash as much as additive.  The formula is basically
RGB' = RGB * (1+light)
(though it appears slightly different in coded form due to minor factoring)

To compare:
Press 'a' or 'A' to use additive blending
Press 's' or 'S' to use multiplicative (spotlight) blending

Source code: SpotLighting

Built with Processing