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32 #define LARGE_DISTANCE 100000
33 #define MIN_BLOB_SIZE 10
34 #define MAX_ASPECT_RATIO 2.5
45 #define same_point(p1,p2) \
46 ((abs (p1.x - p2.x) < chop_same_distance) && \
47 (abs (p1.y - p2.y) < chop_same_distance))
56 #define dist_square(p1,p2) \
57 ((p2.x - p1.x) * (p2.x - p1.x) + \
58 (p2.y - p1.y) * (p2.y - p1.y))
67 #define closest(test_p,p1,p2) \
70 ((dist_square (test_p->pos, p1->pos) < \
71 dist_square (test_p->pos, p2->pos)) ? \
83 #define edgept_dist(p1,p2) \
84 (dist_square ((p1)->pos, (p2)->pos))
93 #define is_exterior_point(edge,point) \
94 (same_point (edge->prev->pos, point->pos) || \
95 same_point (edge->next->pos, point->pos) || \
96 (angle_change (edge->prev, edge, edge->next) - \
97 angle_change (edge->prev, edge, point) > 20))
105 #define is_equal(p1,p2) \
106 (((p1).x == (p2).x) && ((p1).y == (p2).y))
116 #define is_on_line(p,p0,p1) \
117 (within_range ((p).x, (p0).x, (p1).x) && \
118 within_range ((p).y, (p0).y, (p1).y))
127 #define within_range(x,x0,x1) \
128 (((x0 <= x) && (x <= x1)) || ((x1 <= x) && (x <= x0)))