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

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

Definition at line 51 of file linecros.c.

Referenced by dig_find_intersection(), and dig_test_for_intersection().

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

Definition at line 53 of file linecros.c.

Referenced by dig_find_intersection(), and dig_test_for_intersection().

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

Definition at line 55 of file linecros.c.

Referenced by dig_find_intersection(), and dig_test_for_intersection().

Function Documentation

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 103 of file linecros.c.

References D, D1, and D2.

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

Definition at line 58 of file linecros.c.

References D, D1, and D2.