/* phi_tri_cm.h  compute coefficients of phi_tri.c functions
 *               for a specific triangle
 *               call three times:
 *               phi_tri_cm22(x1, y1, x2, y2, x3, y3, debug, cm1);
 *               phi_tri_cm22(x2, y2, x3, y3, x1, y1, debug, cm2);
 *               phi_tri_cm22(x3, y3, x1, y1, x2, y2, debug, cm3);
 *
 *               see phi_tri.h for numbering sequence
 */

void phi_tri_cm12(double x1, double y1, double x2, double y2,
                  double x3, double y3, int kdebug, double cm[]);

void phi_tri_cm22(double x1, double y1, double x2, double y2,
                  double x3, double y3, int kdebug, double cm[]);

void phi_tri_cm32(double x1, double y1, double x2, double y2,
                  double x3, double y3, int kdebug, double cm[]);