CIRCUM - define CIRCUMcircles for Delaunay triangulation circum - compute center and radius-squared of circumcircle of 3 (x,y) locations circumTri - compute center and radius-squared of circumcircle of triangular face Function Prototypes: void circum (float x1, float y1, float x2, float y2, float x3, float y3, float *xc, float *yc, float *rs); void circumTri (Tri *t); circum: Input: x1 x-coordinate of first point y1 y-coordinate of first point x2 x-coordinate of second point y2 y-coordinate of second point x3 x-coordinate of third point y3 y-coordinate of third point Output: xc pointer to x-coordinate of center of circumcircle yc pointer to y-coordinate of center of circumcircle rs pointer radius^2 of circumcircle circumTri: Input: t Pointer to Tri Returns: xc x-coordinate of circumcircle yc y-coordinate of circumcircle rs radius^2 of circumcircle Author: Dave Hale, Colorado School of Mines, Fall 1990.