Homework #2: Collision Detection Between Rigid Bodies
Due on Wednesday, March 6, 2002
(6 pt)
Problem A: Implementation
Write a program to detect collisions
among many spherelike objects of different sizes
flying insid a confined region (e.g. a cube, a table with boundary, etc);
Each object is given an initial random velocity and angular velocity.
The velocity stays the same unless an object hits an obstacle (e.g. a wall or
another object), in which case a component of the velocity should be flipped
so that the object stays within the confinement.
State your assumptions about the objects!
You may wish to reuse and modify the source code available at:
http://www.cs.unc.edu/~geom/collide/packages.shtml
(9pt) Problem B: Analysis
Analyze performance of your algorithm (or implementation) in different
situations.
Change the following parameters and measure computation time:

Number of objects (1~50)

Complexity of objects (The number of polygons for each object. Try
at least 3 different data sets)

Sizes of objects (The relative size of each object w.r.t. the extension
of the bounding cube.)
Your algorithm (implementation) should exhibit different characteristics to
the variation of these parameters.
Present data in tables and graphs, and explain the differences in performance.
(10pt) Problem C: Varying Parameters
Same as Problem A, except the objects have the same size. What would
you do differently? Show a simple prototype implementation to compare
and contrast the performance of two different algorithms (implementation).
This assignment will be graded based upon: