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/*
* coord.h - Coordinate representation and basic operations
*
* Written 2009, 2010 by Werner Almesberger
* Copyright 2009, 2010 by Werner Almesberger
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#ifndef COORD_H
#define COORD_H
#include <stdint.h>
#define MICRON_UNITS 10
#define MIL_UNITS (25.4*MICRON_UNITS)
#define MM_UNITS (1000.0*MICRON_UNITS)
#define KICAD_UNIT (MIL_UNITS/10.0)
#define MIL_IN_MM 0.0254
typedef int32_t unit_type;
#define UNIT_ERROR ((unit_type) 1 << (sizeof(unit_type)*8-1))
struct coord {
unit_type x, y;
};
static inline unit_type mil_to_units(double mil)
{
return mil*MIL_UNITS;
}
static inline unit_type mm_to_units(double mm)
{
return mm*MM_UNITS;
}
static inline double units_to_mm(unit_type u)
{
return (double) u/MM_UNITS;
}
static inline double units_to_mil(unit_type u)
{
return (double) u/MIL_UNITS;
}
static inline int units_to_kicad(unit_type u)
{
return (double) u/KICAD_UNIT;
}
static inline int coord_eq(struct coord a, struct coord b)
{
return a.x == b.x && a.y == b.y;
}
double mm_to_mil(double mm, int exponent);
double mil_to_mm(double mil, int exponent);
double units_to_best(unit_type u, int *mm);
struct coord normalize(struct coord v, unit_type len);
struct coord rotate(struct coord v, double angle);
struct coord add_vec(struct coord a, struct coord b);
struct coord sub_vec(struct coord a, struct coord b);
struct coord neg_vec(struct coord v);
struct coord rotate_r(struct coord c, unit_type r, double angle);
double theta_vec(struct coord v);
double theta(struct coord c, struct coord p);
void sort_coord(struct coord *min, struct coord *max);
unit_type dist_point(struct coord a, struct coord b);
unit_type dist_line(struct coord p, struct coord a, struct coord b);
unit_type dist_rect(struct coord p, struct coord a, struct coord b);
int inside_rect(struct coord p, struct coord a, struct coord b);
unit_type dist_circle(struct coord p, struct coord c, unit_type r);
#endif /* !COORD_H */
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