From 9ec9111dcbac7414e503a8a3d01cfb66ce7184c9 Mon Sep 17 00:00:00 2001
From: Marius Kintel <marius@kintel.net>
Date: Wed, 7 Sep 2011 00:47:01 +0200
Subject: Fixed another projection() crash bug; only 3D children


diff --git a/src/PolySetCGALEvaluator.cc b/src/PolySetCGALEvaluator.cc
index 1ac053f..ff02359 100644
--- a/src/PolySetCGALEvaluator.cc
+++ b/src/PolySetCGALEvaluator.cc
@@ -29,6 +29,10 @@ PolySet *PolySetCGALEvaluator::evaluatePolySet(const ProjectionNode &node, Abstr
 		else sum += N;
 	}
 	if (sum.empty()) return NULL;
+	if (sum.dim != 2) {
+		PRINTF("WARNING: Body of projection() must be a 3D object");
+		return NULL;
+	}
 
 	PolySet *ps = new PolySet();
 	ps->convexity = node.convexity;
-- 
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