03/26/2002
15-462 Graphics I
21
Ray-Quadric Intersection
•Quadric f(p) = f(x, y, z) = 0,
where f is polynomial of order 2
•Sphere, ellipsoid, paraboloid,
hyperboloid, cone, cylinder
•Closed
form solution as for sphere
•Important
case for modelling in ray tracing
•Combine
with CSG
•[see Handout]