mirror of git://projects.qi-hardware.com/fped.git
120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
/*
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* coord.h - Coordinate representation and basic operations
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*
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* Written 2009, 2010, 2016 by Werner Almesberger
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* Copyright 2009, 2010, 2016 by Werner Almesberger
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* Copyright 2016, Erich Heinzle (gEDA additions)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#ifndef COORD_H
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#define COORD_H
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#include <stdint.h>
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#define MICRON_UNITS 10
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#define MIL_UNITS (25.4*MICRON_UNITS)
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#define MM_UNITS (1000.0*MICRON_UNITS)
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#define UM_UNITS MICRON_UNITS
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#define KICAD_UNIT (MIL_UNITS/10.0)
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#define GEDA_UNIT (MIL_UNITS/100.0)
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#define MIL_IN_MM 0.0254
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#define UM_IN_MM 0.001
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typedef int32_t unit_type;
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#define UNIT_ERROR ((unit_type) 1 << (sizeof(unit_type)*8-1))
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struct coord {
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unit_type x, y;
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};
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static inline unit_type mil_to_units(double mil)
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{
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return mil*MIL_UNITS;
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}
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static inline unit_type mm_to_units(double mm)
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{
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return mm*MM_UNITS;
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}
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static inline unit_type um_to_units(double mm)
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{
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return mm*UM_UNITS;
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}
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static inline double units_to_mm(unit_type u)
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{
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return (double) u/MM_UNITS;
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}
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static inline double units_to_um(unit_type u)
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{
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return (double) u/UM_UNITS;
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}
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static inline double units_to_mil(unit_type u)
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{
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return (double) u/MIL_UNITS;
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}
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static inline int units_to_kicad(unit_type u)
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{
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return (double) u/KICAD_UNIT;
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}
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static inline int units_to_geda(unit_type u)
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{
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return (double) u/GEDA_UNIT;
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}
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static inline int coord_eq(struct coord a, struct coord b)
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{
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return a.x == b.x && a.y == b.y;
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}
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double mm_to_mil(double mm, int exponent);
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double mil_to_mm(double mil, int exponent);
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double um_to_mm(double um, int exponent);
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double units_to_best(unit_type u, int *mm);
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struct coord normalize(struct coord v, unit_type len);
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struct coord rotate(struct coord v, double angle);
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struct coord add_vec(struct coord a, struct coord b);
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struct coord sub_vec(struct coord a, struct coord b);
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struct coord neg_vec(struct coord v);
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struct coord rotate_r(struct coord c, unit_type r, double angle);
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double theta_vec(struct coord v);
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double theta(struct coord c, struct coord p);
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void sort_coord(struct coord *min, struct coord *max);
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unit_type dist_point(struct coord a, struct coord b);
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unit_type dist_line(struct coord p, struct coord a, struct coord b);
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unit_type dist_rect(struct coord p, struct coord a, struct coord b);
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int inside_rect(struct coord p, struct coord a, struct coord b);
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unit_type dist_circle(struct coord p, struct coord c, unit_type r);
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#endif /* !COORD_H */
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