From d6a57b89682ed7991744dc142e9af21d5e74cb83 Mon Sep 17 00:00:00 2001
From: Don Bright <hugh.m.bright@gmail.com>
Date: Thu, 12 Sep 2013 19:44:07 -0500
Subject: fix bug in 2d resize code


diff --git a/src/CGALEvaluator.cc b/src/CGALEvaluator.cc
index 09070d5..8da4649 100644
--- a/src/CGALEvaluator.cc
+++ b/src/CGALEvaluator.cc
@@ -215,6 +215,7 @@ CGAL_Nef_polyhedron CGALEvaluator::applyResize(const CgaladvNode &node)
 	bbox_size.push_back( bb.xmax()-bb.xmin() );
 	bbox_size.push_back( bb.ymax()-bb.ymin() );
 	bbox_size.push_back( bb.zmax()-bb.zmin() );
+
 	int newsizemax_index = 0;
 	for (int i=0;i<N.dim;i++) {
 		if (node.newsize[i]) {
@@ -229,7 +230,10 @@ CGAL_Nef_polyhedron CGALEvaluator::applyResize(const CgaladvNode &node)
 				newsizemax_index = i;
 		}
 	}
-	NT3 autoscale = NT3( node.newsize[ newsizemax_index ] ) / bbox_size[ newsizemax_index ];
+
+	NT3 autoscale = NT3( 1 );
+	if ( node.newsize[ newsizemax_index ] != 0 )
+		autoscale = NT3( node.newsize[ newsizemax_index ] ) / bbox_size[ newsizemax_index ];
 	for (int i=0;i<N.dim;i++) {
 		if (node.autosize[i] && node.newsize[i]==0)
 			scale[i] = autoscale;
diff --git a/testdata/scad/features/resize-2d-tests.scad b/testdata/scad/features/resize-2d-tests.scad
index 911a4cd..3b6fe9d 100644
--- a/testdata/scad/features/resize-2d-tests.scad
+++ b/testdata/scad/features/resize-2d-tests.scad
@@ -53,3 +53,11 @@ translate([32,16]) resize([0,0,15],auto=true) shape2();
 translate([32,32]) resize([0,0,15]) shape3();
 }
 
+color("blue"){
+translate([-16,-16]) resize([10,8],auto=[false,true]) 
+	scale([0.5,100,20]) shape();
+translate([0,-16]) resize([8,10,15],auto=true) 
+	scale([1000,0.5]) shape2();
+translate([16,-16]) resize([10,8,15]) 
+	scale([200,200]) shape3();
+}
diff --git a/tests/regression/cgalpngtest/resize-2d-tests-expected.png b/tests/regression/cgalpngtest/resize-2d-tests-expected.png
index 01cc5b1..e764ac3 100644
Binary files a/tests/regression/cgalpngtest/resize-2d-tests-expected.png and b/tests/regression/cgalpngtest/resize-2d-tests-expected.png differ
diff --git a/tests/regression/dumptest/resize-2d-tests-expected.csg b/tests/regression/dumptest/resize-2d-tests-expected.csg
index 5f8d8b5..5cd9a2e 100644
--- a/tests/regression/dumptest/resize-2d-tests-expected.csg
+++ b/tests/regression/dumptest/resize-2d-tests-expected.csg
@@ -173,4 +173,54 @@ group() {
 			}
 		}
 	}
+	color([0, 0, 1, 1]) {
+		multmatrix([[1, 0, 0, -16], [0, 1, 0, -16], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+			resize(newsize = [10,8,0], auto = [0,1,0]) {
+				multmatrix([[0.5, 0, 0, 0], [0, 100, 0, 0], [0, 0, 20, 0], [0, 0, 0, 1]]) {
+					group() {
+						difference() {
+							square(size = [5, 5], center = false);
+							multmatrix([[1, 0, 0, 1], [0, 1, 0, 1], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+								square(size = [1, 1], center = false);
+							}
+							multmatrix([[1, 0, 0, 3], [0, 1, 0, 3], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+								circle($fn = 10, $fa = 12, $fs = 2, r = 1);
+							}
+						}
+					}
+				}
+			}
+		}
+		multmatrix([[1, 0, 0, 0], [0, 1, 0, -16], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+			resize(newsize = [8,10,15], auto = [1,1,1]) {
+				multmatrix([[1000, 0, 0, 0], [0, 0.5, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+					group() {
+						difference() {
+							square(size = [5, 5], center = false);
+							multmatrix([[1, 0, 0, 1], [0, 1, 0, 1], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+								square(size = [1, 1], center = false);
+							}
+							multmatrix([[1, 0, 0, 2], [0, 1, 0, 2], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+								square(size = [1, 1], center = false);
+							}
+						}
+					}
+				}
+			}
+		}
+		multmatrix([[1, 0, 0, 16], [0, 1, 0, -16], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+			resize(newsize = [10,8,15], auto = [0,0,0]) {
+				multmatrix([[200, 0, 0, 0], [0, 200, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+					group() {
+						difference() {
+							square(size = [5, 5], center = false);
+							multmatrix([[1, 0, 0, 0], [0, 1, 0, 2.5], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+								square(size = [5, 1], center = false);
+							}
+						}
+					}
+				}
+			}
+		}
+	}
 }
diff --git a/tests/regression/opencsgtest/resize-2d-tests-expected.png b/tests/regression/opencsgtest/resize-2d-tests-expected.png
index 5a2d976..83a1ca7 100644
Binary files a/tests/regression/opencsgtest/resize-2d-tests-expected.png and b/tests/regression/opencsgtest/resize-2d-tests-expected.png differ
diff --git a/tests/regression/throwntogethertest/resize-2d-tests-expected.png b/tests/regression/throwntogethertest/resize-2d-tests-expected.png
index 1c007ed..6c55fa9 100644
Binary files a/tests/regression/throwntogethertest/resize-2d-tests-expected.png and b/tests/regression/throwntogethertest/resize-2d-tests-expected.png differ
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