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67 lines
1.7 KiB
C
67 lines
1.7 KiB
C
/*
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* path.h - Toolpath operations
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*
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* Written 2010-2012 by Werner Almesberger
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* Copyright 2010-2012 Werner Almesberger
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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 PATH_H
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#define PATH_H
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#include <math.h>
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struct point {
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double x, y, z; /* mm */
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struct point *next;
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};
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struct path {
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struct point *first, *last;
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double r_tool; /* mm */
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int outside; /* non-zero to mark path as an outside edge */
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int notch; /* non-zero to enable dog-boning for path */
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const char *id; /* identifier assigned by generator */
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struct path *next;
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};
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/*
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* We allow for a bit of tolerance, to absorb the rounding errors KiCad
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* produces with designs using a metric grid.
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*/
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#define EPSILON_MM 0.006 /* 6 um */
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static inline int points_eq(const struct point *a, const struct point *b)
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{
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if (hypot(a->x-b->x, a->y-b->y) > EPSILON_MM)
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return 0;
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if (fabs(a->z-b->z) > EPSILON_MM)
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return 0;
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return 1;
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}
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struct path *path_new(double r_tool, const char *id);
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void path_add(struct path *path, double x, double y, double z);
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struct path *path_reverse(const struct path *path);
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struct path *path_clone(const struct path *path);
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int path_is_closed(const struct path *path);
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int path_tool_is_left(const struct path *path);
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struct path *path_offset(const struct path *path, int left, int notch);
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const struct path *path_find_leftmost(const struct path *path);
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int path_is_inside(const struct path *a, const struct path *b);
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void path_free(struct path *path);
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struct path *path_connect(struct path *path);
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void path_stats(const struct path *path);
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#endif /* !PATH_H */
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