star-cpr

commit cc65cf5d2561666768ee2eb862c084e91868c766
parent 522d79db125cc8b0c1329eaf55bf1677df2de072
Author: Christophe Coustet <christophe.coustet@meso-star.com>
Date:   Fri,  3 Feb 2023 16:00:11 +0100

Check offsetting result polygon is in-range

Diffstat:
M
src/scpr_polygon.c
 | 
9
+++++++++

1 file changed, 9 insertions(+), 0 deletions(-)
diff --git a/src/scpr_polygon.c b/src/scpr_polygon.c
@@ -330,6 +330,15 @@ scpr_offset_polygon
     goto error;
   }
 
+  /* Check offset polygon will be in-range */
+  if(offset > 0) {
+    double pt[2];
+    d2_sub(pt, poly_desc->upper, d2(pt, -offset, -offset));
+    ERR(check_and_truncate_vertex(pt));
+    d2_add(pt, poly_desc->upper, d2(pt, offset, offset));
+    ERR(check_and_truncate_vertex(pt));
+  }
+
   /* Check join type */
   switch(join_type) {
     case SCPR_JOIN_SQUARE: