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authorNicolas Schodet2012-05-05 17:39:11 +0200
committerNicolas Schodet2012-05-05 17:39:11 +0200
commite50baf1bcea86bd969b7d87e9dd643607ef7f161 (patch)
tree3f4b2e01a3d0b9362d8bd88bc735155c19623d2b /digital/avr/modules/math/geometry/intersection.c
parentacd8e0eefa259500bf1325fa6b84c3b615d00782 (diff)
digital/avr/modules/math/geometry: intersection with a polygon
Diffstat (limited to 'digital/avr/modules/math/geometry/intersection.c')
-rw-r--r--digital/avr/modules/math/geometry/intersection.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/digital/avr/modules/math/geometry/intersection.c b/digital/avr/modules/math/geometry/intersection.c
index 8438813b..1f8a9278 100644
--- a/digital/avr/modules/math/geometry/intersection.c
+++ b/digital/avr/modules/math/geometry/intersection.c
@@ -85,3 +85,20 @@ intersection_segment_segment (const vect_t *a, const vect_t *b,
}
}
}
+
+uint8_t
+intersection_segment_poly (const vect_t *a, const vect_t *b,
+ const vect_t *poly, uint8_t poly_size)
+{
+ uint8_t i;
+ assert (poly_size > 0);
+ for (i = 0; i < poly_size - 1; i++)
+ {
+ if (intersection_segment_segment (a, b, &poly[i], &poly[i + 1]))
+ return 1;
+ }
+ if (intersection_segment_segment (a, b, &poly[i], &poly[0]))
+ return 1;
+ return 0;
+}
+