Account for rounding errors when calculating edge head and tail

Previously, we could find the "maximum exit point" of an edge to be very
slightly inside the actual bounds; this would cause the actual exit
point not to be found.  So we expand the bounding rect very slightly.

1 files changed, 2 insertions, 1 deletions

diff --git a/tikzit/src/common/Edge.m b/tikzit/src/common/Edge.m
index e90806d..aa8a3ac 100644
--- a/tikzit/src/common/Edge.m
+++ b/tikzit/src/common/Edge.m
@@ -83,7 +83,8 @@
 	}
 
 	Transformer *shapeTrans = [node shapeTransformer];
-	NSRect searchArea = [node boundsUsingShapeTransform:shapeTrans];
+	// rounding errors are a pain
+	NSRect searchArea = NSInsetRect([node boundsUsingShapeTransform:shapeTrans],-0.01,-0.01);
 	if (!NSPointInRect(rayStart, searchArea)) {
 		return rayStart;
 	}