03/12/2002
15-462 Graphics I
34
Collisions
•Often
expensive to compute (bounding boxes)
•Elastic
collision
–Particle
retains all energy
–Reflected
like a light beam
–Need
surface normal
•Inelastic
collision
–Coefficient
of restitution: fraction of normal velocity
–Example:
simple bouncing ball
•Example:
particles inside a sphere
[Angel, Ch
11.5.2]