2009

TIP InterParticle Collisions, Deflector Binding, and Bubble Noise do not get along
well together. Particles may leak through the deflector when these three are used
together. Instead of bubble motion, use animated mapping. Use facing particles
with an animated map of a bubble, where the bubble is smaller than the map
size. The bubble is animated moving around the map. This simulates bubble
motion at the map level.
Interface
Amplitude The distance the particle moves off its usual velocity vector as it
travels.
Variation The percent of Amplitude variation applied to each particle.
Period The cycle time for one complete oscillation of a particle through the
bubble "wave." A recommended value might be 20 to 30 intervals.
NOTE Bubble motion is measured in time, not in rate, so a very large Period value
means the motion takes a long time to complete. Thus, there is no motion,
effectively. Period is therefore set to a very large default value so that the default
motion of this type is none.
Variation The percent of Period variation for each particle.
Phase The initial displacement of the bubble pattern along the vector.
Variation The percent of Phase variation for each particle.
3068 | Chapter 14 Space Warps and Particle Systems