#ifndef GRASS_E_INTERSECT_H
#define GRASS_E_INTERSECT_H

#define FZERO(X, TOL)     (fabs(X) < TOL)
#define FEQUAL(X, Y, TOL) (fabs(X - Y) < TOL)

/*int segment_intersection_2d_e(double ax1, double ay1, double ax2, double ay2,
   double bx1, double by1, double bx2, double by2, double *x1, double *y1,
   double *x2, double *y2); int segment_intersection_2d_test(double ax1, double
   ay1, double ax2, double ay2, double bx1, double by1, double bx2, double by2,
   double *x1, double *y1, double *x2, double *y2); */

int segment_intersection_2d_tol(double ax1, double ay1, double ax2, double ay2,
                                double bx1, double by1, double bx2, double by2,
                                double *x1, double *y1, double *x2, double *y2,
                                double tol);

int segment_intersection_2d(double ax1, double ay1, double ax2, double ay2,
                            double bx1, double by1, double bx2, double by2,
                            double *x1, double *y1, double *x2, double *y2);

int almost_equal(double a, double b, int bits);

#endif
