From dda5195130c6f0628768ad2a441b91c6fe5955e5 Mon Sep 17 00:00:00 2001
From: Marius Kintel <marius@kintel.net>
Date: Sun, 22 Apr 2012 19:31:23 -0400
Subject: Align tesselation of cylinders and rotate_extrude. Fixes #108


diff --git a/src/PolySetCGALEvaluator.cc b/src/PolySetCGALEvaluator.cc
index 6ed1ab4..1cc6b16 100644
--- a/src/PolySetCGALEvaluator.cc
+++ b/src/PolySetCGALEvaluator.cc
@@ -454,15 +454,10 @@ PolySet *PolySetCGALEvaluator::rotateDxfData(const RotateExtrudeNode &node, DxfD
 		}
 
 		for (int j = 0; j < fragments; j++) {
-			double a = (j*2*M_PI) / fragments;
+			double a = (j*2*M_PI) / fragments - M_PI/2; // start on the X axis
 			for (size_t k = 0; k < dxf.paths[i].indices.size(); k++) {
-				if (dxf.points[dxf.paths[i].indices[k]][0] == 0) {
-					points[j][k][0] = 0;
-					points[j][k][1] = 0;
-				} else {
-					points[j][k][0] = dxf.points[dxf.paths[i].indices[k]][0] * sin(a);
-					points[j][k][1] = dxf.points[dxf.paths[i].indices[k]][0] * cos(a);
-				}
+				points[j][k][0] = dxf.points[dxf.paths[i].indices[k]][0] * sin(a);
+			 	points[j][k][1] = dxf.points[dxf.paths[i].indices[k]][0] * cos(a);
 				points[j][k][2] = dxf.points[dxf.paths[i].indices[k]][1];
 			}
 		}
-- 
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