linecros.c File Reference

#include <stdio.h>

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Macros
#define	D   ((ax2 - ax1) * (by1 - by2) - (ay2 - ay1) * (bx1 - bx2))
#define	D1   ((bx1 - ax1) * (by1 - by2) - (by1 - ay1) * (bx1 - bx2))
#define	D2   ((ax2 - ax1) * (by1 - ay1) - (ay2 - ay1) * (bx1 - ax1))

Functions
int	dig_test_for_intersection (double ax1, double ay1, double ax2, double ay2, double bx1, double by1, double bx2, double by2)
int	dig_find_intersection (double ax1, double ay1, double ax2, double ay2, double bx1, double by1, double bx2, double by2, double *x, double *y)

Macro Definition Documentation

D

#define D   ((ax2 - ax1) * (by1 - by2) - (ay2 - ay1) * (bx1 - bx2))

Definition at line 51 of file linecros.c.

D1

#define D1   ((bx1 - ax1) * (by1 - by2) - (by1 - ay1) * (bx1 - bx2))

Definition at line 53 of file linecros.c.

D2

#define D2   ((ax2 - ax1) * (by1 - ay1) - (ay2 - ay1) * (bx1 - ax1))

Definition at line 55 of file linecros.c.

Function Documentation

dig_find_intersection()

int dig_find_intersection	(	double	ax1,
		double	ay1,
		double	ax2,
		double	ay2,
		double	bx1,
		double	by1,
		double	bx2,
		double	by2,
		double *	x,
		double *	y
	)

Definition at line 181 of file linecros.c.

References D, D1, D2, t, and x.

dig_test_for_intersection()

int dig_test_for_intersection	(	double	ax1,
		double	ay1,
		double	ax2,
		double	ay2,
		double	bx1,
		double	by1,
		double	bx2,
		double	by2
	)

Definition at line 57 of file linecros.c.

References D, D1, D2, and t.