# Closest Pair Applications: Ray-Intersection Diagram

(or, Crashing Motorcycles Efficiently)

Click and drag to specify the initial locations and velocities of a
system of moving particles. Each particle stops moving when it crosses
the track left by another particle.
For more detailed information on this diagram,
see Jeff Erickson's page
"crashing
motorcycles efficiently". This implementation is based on the
FastPair version of our closest pair data
structures (with nearest neighbors found by sequential search rather than
geometric range searching); see the source code
for details.

David Eppstein,
Dept. Information & Computer Science,
UC Irvine,
.