Merge branch 'master' into visitortests

Conflicts:
	src/polyset.h

142 files changed, 227 insertions, 284 deletions

diff --git a/README b/README
index 0351ff6..85baf16 100644
--- a/README
+++ b/README
@@ -37,7 +37,7 @@ development. Other versions may or may not work as well..
 * Qt4 (4.4 - 4.7):
   http://www.qtsoftware.com/
 
-* CGAL (3.6 - 3.7):
+* CGAL (3.6 - 3.9):
   http://www.cgal.org/
 
 * GMP (5.0.x):
@@ -46,7 +46,7 @@ development. Other versions may or may not work as well..
 * MPFR (3.0.x):
   http://www.mpfr.org/
 
-* boost (1.35 - 1.44, required by CGAL)
+* boost (1.35 - 1.47)
   http://www.boost.org/
 
 * cmake (2.6.x, required by CGAL)
@@ -55,10 +55,10 @@ development. Other versions may or may not work as well..
 * OpenCSG (1.3.0):
   http://www.opencsg.org/
 
-* GLEW (1.5.x, also bundled with OpenCSG)
+* GLEW (1.5.x, 1.6.x, also bundled with OpenCSG)
   http://glew.sourceforge.net/
 
-* Eigen2 (2.0.11)
+* Eigen2 (2.0.13->)
   http://eigen.tuxfamily.org/
 
 * GCC C++ Compiler (4.2, 4.3.1):
diff --git a/RELEASE_NOTES b/RELEASE_NOTES
index f8a10f0..a6a0855 100644
--- a/RELEASE_NOTES
+++ b/RELEASE_NOTES
@@ -10,14 +10,15 @@ o The color() statement now supports an alpha parameter, e.g. color(c=[1,0,0], a
 o The color() statement now supports specifying colors as strings, e.g. color("Red")
 o if() and else() can now take any value type as parameter. false, 0, empty string and empty vector or illegal value type will evaluate as false, everything else as true.
 o Strings can now be lexographically compared using the <, <=, >, >= operators
-o The version() function will return the OpenSCAD version as a string, e.g. "2011.10"
+o The version() function will return the OpenSCAD version as a vector, e.g. [2011, 09]
+o The version_num() function will return the OpenSCAD version as a number, e.g. 20110923
 
 Bugfixes:
 o square() crashed if any of the dimensions were zero
 o Flush Caches didn't flush cached USE'd modules
 o STL export should be a bit more robust
 o Dropping a file into the editor under Windows didn't work (double C:/C:/ problem)
-
+o On some platforms it was possible to insertion rich text in the editor, causing confusion.
 
 Deprecations:
 o dxf_linear_extrude() and dxf_rotate_extrude() are now deprecated.
diff --git a/doc/TODO.txt b/doc/TODO.txt
index 97af30a..65534b8 100644
--- a/doc/TODO.txt
+++ b/doc/TODO.txt
@@ -114,6 +114,8 @@ o Misc
   - Save: Ask for confirmation if file has been externally changed
   - Rename OpenCSG and CGAL to smth. not specific to the underlying libraries
     (e.g Preview, Render)
+  - If trying to export STL/DXF but source is newer than the CGAL rendering, ask
+    for confirmation.
 o Cmd-line
   - Add verbose option (PRINT command from mainwin.cc and progress output)
 
diff --git a/openscad.pro b/openscad.pro
index 765ff6b..3a41800 100644
--- a/openscad.pro
+++ b/openscad.pro
@@ -13,6 +13,10 @@ win32 {
 } else {
   isEmpty(VERSION) VERSION = $$system(date "+%Y.%m.%d")
 }
+VERSION_SPLIT=$$split(VERSION, ".")
+VERSION_YEAR=$$member(VERSION_SPLIT, 0)
+VERSION_MONTH=$$member(VERSION_SPLIT, 1)
+VERSION_DAY=$$member(VERSION_SPLIT, 2)
 
 #configure lex / yacc
 win32 {
@@ -31,7 +35,8 @@ win32 {
     INCLUDEPATH += $$(MPFRDIR)
 }
 
-DEFINES += OPENSCAD_VERSION=$$VERSION
+DEFINES += OPENSCAD_VERSION=$$VERSION OPENSCAD_YEAR=$$VERSION_YEAR OPENSCAD_MONTH=$$VERSION_MONTH
+!isEmpty(VERSION_DAY): DEFINES += OPENSCAD_DAY=$$VERSION_DAY
 win32:DEFINES += _USE_MATH_DEFINES NOMINMAX _CRT_SECURE_NO_WARNINGS YY_NO_UNISTD_H
 
 #disable warning about too long decorated names
@@ -166,6 +171,8 @@ HEADERS += src/renderer.h \
            src/Tree.h \
            src/mathc99.h \
            src/memory.h \
+           src/linalg.h \
+           src/system-gl.h \
            src/stl-utils.h
 
 SOURCES += src/openscad.cc \
diff --git a/src/CGALEvaluator.cc b/src/CGALEvaluator.cc
index d950cb8..10160ae 100644
--- a/src/CGALEvaluator.cc
+++ b/src/CGALEvaluator.cc
@@ -11,6 +11,7 @@
 #include "polyset.h"
 #include "dxfdata.h"
 #include "dxftess.h"
+#include "Tree.h"
 
 #include "CGALCache.h"
 #include "cgal.h"
@@ -205,8 +206,8 @@ Response CGALEvaluator::visit(State &state, const TransformNode &node)
 				// tesselate it and create a new CGAL_Nef_polyhedron2 from it.. What a hack!
 				
 				CGAL_Aff_transformation2 t(
-					node.matrix[0], node.matrix[4], node.matrix[12],
-					node.matrix[1], node.matrix[5], node.matrix[13], node.matrix[15]);
+					node.matrix(0,0), node.matrix(0,1), node.matrix(0,3),
+					node.matrix(1,0), node.matrix(1,1), node.matrix(1,3), node.matrix(3,3));
 				
 				DxfData *dd = N.convertToDxfData();
 				for (size_t i=0; i < dd->points.size(); i++) {
@@ -225,9 +226,9 @@ Response CGALEvaluator::visit(State &state, const TransformNode &node)
 			}
 			else if (N.dim == 3) {
 				CGAL_Aff_transformation t(
-					node.matrix[0], node.matrix[4], node.matrix[ 8], node.matrix[12],
-					node.matrix[1], node.matrix[5], node.matrix[ 9], node.matrix[13],
-					node.matrix[2], node.matrix[6], node.matrix[10], node.matrix[14], node.matrix[15]);
+					node.matrix(0,0), node.matrix(0,1), node.matrix(0,2), node.matrix(0,3),
+					node.matrix(1,0), node.matrix(1,1), node.matrix(1,2), node.matrix(1,3),
+					node.matrix(2,0), node.matrix(2,1), node.matrix(2,2), node.matrix(2,3), node.matrix(3,3));
 				N.p3->transform(t);
 			}
 			CGALCache::instance()->insert(this->tree.getIdString(node), N);
diff --git a/src/CGALEvaluator.h b/src/CGALEvaluator.h
index c1b5ae8..0ac716c 100644
--- a/src/CGALEvaluator.h
+++ b/src/CGALEvaluator.h
@@ -3,7 +3,6 @@
 
 #include "myqhash.h"
 #include "visitor.h"
-#include "Tree.h"
 #include "CGAL_Nef_polyhedron.h"
 #include "PolySetCGALEvaluator.h"
 
@@ -11,16 +10,11 @@
 #include <map>
 #include <list>
 
-using std::string;
-using std::map;
-using std::list;
-using std::pair;
-
 class CGALEvaluator : public Visitor
 {
 public:
 	enum CsgOp {CGE_UNION, CGE_INTERSECTION, CGE_DIFFERENCE, CGE_MINKOWSKI};
-	CGALEvaluator(const Tree &tree) : tree(tree), psevaluator(*this) {}
+	CGALEvaluator(const class Tree &tree) : tree(tree), psevaluator(*this) {}
   virtual ~CGALEvaluator() {}
 
   virtual Response visit(State &state, const AbstractNode &node);
@@ -42,9 +36,9 @@ private:
 	CGAL_Nef_polyhedron applyToChildren(const AbstractNode &node, CGALEvaluator::CsgOp op);
 	CGAL_Nef_polyhedron applyHull(const CgaladvNode &node);
 
-  string currindent;
-  typedef list<pair<const AbstractNode *, string> > ChildList;
-  map<int, ChildList> visitedchildren;
+	std::string currindent;
+  typedef std::list<std::pair<const AbstractNode *, std::string> > ChildList;
+	std::map<int, ChildList> visitedchildren;
 
 	const Tree &tree;
 public:
diff --git a/src/CGALRenderer.h b/src/CGALRenderer.h
index 5f854ea..9c19e5a 100644
--- a/src/CGALRenderer.h
+++ b/src/CGALRenderer.h
@@ -2,12 +2,11 @@
 #define CGALRENDERER_H_
 
 #include "renderer.h"
-#include "CGAL_Nef_polyhedron.h"
 
 class CGALRenderer : public Renderer
 {
 public:
-	CGALRenderer(const CGAL_Nef_polyhedron &root);
+	CGALRenderer(const class CGAL_Nef_polyhedron &root);
 	~CGALRenderer();
 	void draw(bool showfaces, bool showedges) const;
 
diff --git a/src/CSGTermEvaluator.cc b/src/CSGTermEvaluator.cc
index ebea89c..d1af987 100644
--- a/src/CSGTermEvaluator.cc
+++ b/src/CSGTermEvaluator.cc
@@ -86,8 +86,8 @@ Response CSGTermEvaluator::visit(State &state, const AbstractIntersectionNode &n
 }
 
 static CSGTerm *evaluate_csg_term_from_ps(const State &state, 
-																					vector<CSGTerm*> &highlights, 
-																					vector<CSGTerm*> &background, 
+																					std::vector<CSGTerm*> &highlights, 
+																					std::vector<CSGTerm*> &background, 
 																					const shared_ptr<PolySet> &ps, 
 																					const ModuleInstantiation *modinst, 
 																					const AbstractNode &node)
@@ -147,18 +147,7 @@ Response CSGTermEvaluator::visit(State &state, const CsgNode &node)
 Response CSGTermEvaluator::visit(State &state, const TransformNode &node)
 {
 	if (state.isPrefix()) {
-		double m[16];
-		
-		for (int i = 0; i < 16; i++)
-		{
-			int c_row = i%4;
-			int m_col = i/4;
-			m[i] = 0;
-			for (int j = 0; j < 4; j++) {
-				m[i] += state.matrix()[c_row + j*4] * node.matrix[m_col*4 + j];
-			}
-		}
-		state.setMatrix(m);
+		state.setMatrix(state.matrix() * node.matrix);
 	}
 	if (state.isPostfix()) {
 		applyToChildren(node, CSGT_UNION);
diff --git a/src/CSGTermEvaluator.h b/src/CSGTermEvaluator.h
index ac22906..cca6c91 100644
--- a/src/CSGTermEvaluator.h
+++ b/src/CSGTermEvaluator.h
@@ -1,39 +1,31 @@
 #ifndef CSGTERMEVALUATOR_H_
 #define CSGTERMEVALUATOR_H_
 
-#include <string>
 #include <map>
 #include <list>
 #include <vector>
-#include "Tree.h"
 #include "visitor.h"
-#include "node.h"
-
-using std::string;
-using std::map;
-using std::list;
-using std::vector;
 
 class CSGTermEvaluator : public Visitor
 {
 public:
-	CSGTermEvaluator(const Tree &tree, class PolySetEvaluator *psevaluator = NULL)
+	CSGTermEvaluator(const class Tree &tree, class PolySetEvaluator *psevaluator = NULL)
 		: tree(tree), psevaluator(psevaluator) {
 	}
   virtual ~CSGTermEvaluator() {}
 
-  virtual Response visit(State &state, const AbstractNode &node);
- 	virtual Response visit(State &state, const AbstractIntersectionNode &node);
- 	virtual Response visit(State &state, const AbstractPolyNode &node);
- 	virtual Response visit(State &state, const CsgNode &node);
- 	virtual Response visit(State &state, const TransformNode &node);
-	virtual Response visit(State &state, const ColorNode &node);
- 	virtual Response visit(State &state, const RenderNode &node);
- 	virtual Response visit(State &state, const CgaladvNode &node);
+  virtual Response visit(State &state, const class AbstractNode &node);
+ 	virtual Response visit(State &state, const class AbstractIntersectionNode &node);
+ 	virtual Response visit(State &state, const class AbstractPolyNode &node);
+ 	virtual Response visit(State &state, const class CsgNode &node);
+ 	virtual Response visit(State &state, const class TransformNode &node);
+	virtual Response visit(State &state, const class ColorNode &node);
+ 	virtual Response visit(State &state, const class RenderNode &node);
+ 	virtual Response visit(State &state, const class CgaladvNode &node);
 
 	class CSGTerm *evaluateCSGTerm(const AbstractNode &node,
-																 vector<CSGTerm*> &highlights, 
-																 vector<CSGTerm*> &background);
+																 std::vector<CSGTerm*> &highlights, 
+																 std::vector<CSGTerm*> &background);
 
 private:
 	enum CsgOp {CSGT_UNION, CSGT_INTERSECTION, CSGT_DIFFERENCE, CSGT_MINKOWSKI};
@@ -41,14 +33,14 @@ private:
 	void applyToChildren(const AbstractNode &node, CSGTermEvaluator::CsgOp op);
 
   const AbstractNode *root;
-  typedef list<const AbstractNode *> ChildList;
-  map<int, ChildList> visitedchildren;
+  typedef std::list<const AbstractNode *> ChildList;
+	std::map<int, ChildList> visitedchildren;
 
 public:
-  map<int, class CSGTerm*> stored_term; // The term evaluated from each node index
+	std::map<int, class CSGTerm*> stored_term; // The term evaluated from each node index
 
-	vector<CSGTerm*> highlights;
-	vector<CSGTerm*> background;
+	std::vector<CSGTerm*> highlights;
+	std::vector<CSGTerm*> background;
 	const Tree &tree;
 	class PolySetEvaluator *psevaluator;
 };
diff --git a/src/GLView.h b/src/GLView.h
index 1001754..3a36a15 100644
--- a/src/GLView.h
+++ b/src/GLView.h
@@ -1,11 +1,7 @@
 #ifndef GLVIEW_H_
 #define GLVIEW_H_
 
-#ifdef ENABLE_OPENCSG
-// this must be included before the GL headers
-#  include <GL/glew.h>
-#endif
-
+#include "system-gl.h"
 #include <QGLWidget>
 #include <QLabel>
 
diff --git a/src/MainWindow.h b/src/MainWindow.h
index 0ba3bd9..37a6a4c 100644
--- a/src/MainWindow.h
+++ b/src/MainWindow.h
@@ -6,9 +6,7 @@
 #include "openscad.h"
 #include "context.h"
 #include "module.h"
-#include "polyset.h"
 #include "Tree.h"
-#include <QPointer>
 #include <vector>
 
 class MainWindow : public QMainWindow, public Ui::MainWindow
diff --git a/src/OpenCSGRenderer.cc b/src/OpenCSGRenderer.cc
index 4a86c5c..5d6b0da 100644
--- a/src/OpenCSGRenderer.cc
+++ b/src/OpenCSGRenderer.cc
@@ -24,7 +24,7 @@
  *
  */
 
-#include <GL/glew.h>
+#include "system-gl.h"
 #include "OpenCSGRenderer.h"
 #include "polyset.h"
 #include "csgterm.h"
@@ -39,11 +39,11 @@ public:
 	OpenCSGPrim(OpenCSG::Operation operation, unsigned int convexity) :
 			OpenCSG::Primitive(operation, convexity) { }
 	shared_ptr<PolySet> ps;
-	double *m;
+	Transform3d m;
 	int csgmode;
 	virtual void render() {
 		glPushMatrix();
-		glMultMatrixd(m);
+		glMultMatrixd(m.data());
 		ps->render_surface(PolySet::COLORMODE_NONE, PolySet::csgmode_e(csgmode), m);
 		glPopMatrix();
 	}
@@ -85,10 +85,10 @@ void OpenCSGRenderer::renderCSGChain(CSGChain *chain, GLint *shaderinfo,
 			}
 			if (shaderinfo) glUseProgram(shaderinfo[0]);
 			for (; j < i; j++) {
-				double *m = chain->matrices[j];
+				const Transform3d &m = chain->matrices[j];
 				double *c = chain->colors[j];
 				glPushMatrix();
-				glMultMatrixd(m);
+				glMultMatrixd(m.data());
 				int csgmode = chain->types[j] == CSGTerm::TYPE_DIFFERENCE ? PolySet::CSGMODE_DIFFERENCE : PolySet::CSGMODE_NORMAL;
 				if (highlight) {
 					chain->polysets[j]->render_surface(PolySet::COLORMODE_HIGHLIGHT, PolySet::csgmode_e(csgmode + 20), m, shaderinfo);
diff --git a/src/OpenCSGRenderer.h b/src/OpenCSGRenderer.h
index 95ffc8e..e6091aa 100644
--- a/src/OpenCSGRenderer.h
+++ b/src/OpenCSGRenderer.h
@@ -2,8 +2,7 @@
 #define OPENCSGRENDERER_H_
 
 #include "renderer.h"
-#include <GL/glew.h> // this must be included before the GL headers
-#include <qgl.h>
+#include "system-gl.h"
 
 class OpenCSGRenderer : public Renderer
 {
diff --git a/src/PolySetEvaluator.cc b/src/PolySetEvaluator.cc
index 1f09127..b5075ba 100644
--- a/src/PolySetEvaluator.cc
+++ b/src/PolySetEvaluator.cc
@@ -2,6 +2,7 @@
 #include "PolySetEvaluator.h"
 #include "printutils.h"
 #include "polyset.h"
+#include "Tree.h"
 
 /*!
 	The task of PolySetEvaluator is to create, keep track of and cache PolySet instances.
diff --git a/src/PolySetEvaluator.h b/src/PolySetEvaluator.h
index 8d7d1a8..348cbba 100644
--- a/src/PolySetEvaluator.h
+++ b/src/PolySetEvaluator.h
@@ -1,19 +1,17 @@
 #ifndef POLYSETEVALUATOR_H_
 #define POLYSETEVALUATOR_H_
 
-#include "node.h"
-#include "Tree.h"
 #include "memory.h"
 
 class PolySetEvaluator
 {
 public:
-	PolySetEvaluator(const Tree &tree) : tree(tree) {}
+	PolySetEvaluator(const class Tree &tree) : tree(tree) {}
 	virtual ~PolySetEvaluator() {}
 
 	const Tree &getTree() const { return this->tree; }
 
-	virtual shared_ptr<PolySet> getPolySet(const class AbstractNode &, bool cache);
+	virtual shared_ptr<class PolySet> getPolySet(const class AbstractNode &, bool cache);
 
 	virtual PolySet *evaluatePolySet(const class ProjectionNode &) { return NULL; }
 	virtual PolySet *evaluatePolySet(const class LinearExtrudeNode &) { return NULL; }
diff --git a/src/ThrownTogetherRenderer.cc b/src/ThrownTogetherRenderer.cc
index 956fc11..01c7513 100644
--- a/src/ThrownTogetherRenderer.cc
+++ b/src/ThrownTogetherRenderer.cc
@@ -28,8 +28,7 @@
 #include "polyset.h"
 #include "csgterm.h"
 
-#include <GL/glew.h> // this must be included before the GL headers
-#include <qgl.h>
+#include "system-gl.h"
 
 ThrownTogetherRenderer::ThrownTogetherRenderer(CSGChain *root_chain, 
 																							 CSGChain *highlights_chain,
@@ -61,14 +60,14 @@ void ThrownTogetherRenderer::renderCSGChain(CSGChain *chain, bool highlight,
 																						bool fberror) const
 {
 	glDepthFunc(GL_LEQUAL);
-	QHash<QPair<PolySet*,double*>,int> polySetVisitMark;
+	QHash<QPair<PolySet*,Transform3d*>,int> polySetVisitMark;
 	for (size_t i = 0; i < chain->polysets.size(); i++) {
-		if (polySetVisitMark[QPair<PolySet*,double*>(chain->polysets[i].get(), chain->matrices[i])]++ > 0)
+		if (polySetVisitMark[QPair<PolySet*,Transform3d*>(chain->polysets[i].get(), &chain->matrices[i])]++ > 0)
 			continue;
-		double *m = chain->matrices[i];
+		const Transform3d &m = chain->matrices[i];
 		double *c = chain->colors[i];
 		glPushMatrix();
-		glMultMatrixd(m);
+		glMultMatrixd(m.data());
 		int csgmode = chain->types[i] == CSGTerm::TYPE_DIFFERENCE ? PolySet::CSGMODE_DIFFERENCE : PolySet::CSGMODE_NORMAL;
 		if (highlight) {
 			chain->polysets[i]->render_surface(PolySet::COLORMODE_HIGHLIGHT, PolySet::csgmode_e(csgmode + 20), m);
diff --git a/src/cgaladv.cc b/src/cgaladv.cc
index 5014133..c83e18b 100644
--- a/src/cgaladv.cc
+++ b/src/cgaladv.cc
@@ -28,7 +28,6 @@
 #include "module.h"
 #include "context.h"
 #include "builtin.h"
-#include "printutils.h"
 #include "PolySetEvaluator.h"
 #include <sstream>
 #include <assert.h>
diff --git a/src/cgaladv_minkowski2.cc b/src/cgaladv_minkowski2.cc
index f08e7d6..4ce684f 100644
--- a/src/cgaladv_minkowski2.cc
+++ b/src/cgaladv_minkowski2.cc
@@ -26,7 +26,6 @@
 
 #ifdef ENABLE_CGAL
 
-#include "node.h"
 #include "printutils.h"
 #include "grid.h"
 #include "cgal.h"
diff --git a/src/color.cc b/src/color.cc
index a65a8e4..ee8f872 100644
--- a/src/color.cc
+++ b/src/color.cc
@@ -29,7 +29,6 @@
 #include "context.h"
 #include "builtin.h"
 #include "printutils.h"
-#include "visitor.h"
 #include <sstream>
 #include <assert.h>
 #include <QColor>
diff --git a/src/csgops.cc b/src/csgops.cc
index 98d68c7..7b363f0 100644
--- a/src/csgops.cc
+++ b/src/csgops.cc
@@ -29,7 +29,6 @@
 #include "module.h"
 #include "csgterm.h"
 #include "builtin.h"
-#include "printutils.h"
 #include <sstream>
 #include <assert.h>
 
diff --git a/src/csgterm.cc b/src/csgterm.cc
index 5bccff8..0f56b82 100644
--- a/src/csgterm.cc
+++ b/src/csgterm.cc
@@ -47,10 +47,10 @@
  */
 
 
-CSGTerm::CSGTerm(const shared_ptr<PolySet> &polyset, const double matrix[16], const double color[4], const std::string &label)
+CSGTerm::CSGTerm(const shared_ptr<PolySet> &polyset, const Transform3d &matrix, const double color[4], const std::string &label)
 	: type(TYPE_PRIMITIVE), polyset(polyset), label(label), left(NULL), right(NULL)
 {
-	for (int i = 0; i < 16; i++) this->m[i] = matrix[i];
+	this->m = matrix;
 	for (int i = 0; i < 4; i++) this->color[i] = color[i];
 	refcounter = 1;
 }
@@ -188,7 +188,7 @@ CSGChain::CSGChain()
 {
 }
 
-void CSGChain::add(const shared_ptr<PolySet> &polyset, double *m, double *color, CSGTerm::type_e type, std::string label)
+void CSGChain::add(const shared_ptr<PolySet> &polyset, const Transform3d &m, double *color, CSGTerm::type_e type, std::string label)
 {
 	polysets.push_back(polyset);
 	matrices.push_back(m);
@@ -256,11 +256,7 @@ BoundingBox CSGChain::getBoundingBox() const
 			if (!psbox.isNull()) {
 				Eigen::Transform3d t;
 				// Column-major vs. Row-major
-				t.matrix()	<< 
-					matrices[i][0], matrices[i][4], matrices[i][8], matrices[i][12],
-					matrices[i][1], matrices[i][5], matrices[i][9], matrices[i][13],
-					matrices[i][2], matrices[i][6], matrices[i][10], matrices[i][14],
-					matrices[i][3], matrices[i][7], matrices[i][11], matrices[i][15];
+				t = matrices[i];
 				bbox.extend(t * psbox.min());
 				bbox.extend(t * psbox.max());
 			}
diff --git a/src/csgterm.h b/src/csgterm.h
index c4e88a6..b09b2d2 100644
--- a/src/csgterm.h
+++ b/src/csgterm.h
@@ -3,8 +3,10 @@
 
 #include <string>
 #include <vector>
-#include "polyset.h"
 #include "memory.h"
+#include "linalg.h"
+
+class PolySet;
 
 class CSGTerm
 {
@@ -21,11 +23,11 @@ public:
 	std::string label;
 	CSGTerm *left;
 	CSGTerm *right;
-	double m[16];
+	Transform3d m;
 	double color[4];
 	int refcounter;
 
-	CSGTerm(const shared_ptr<PolySet> &polyset, const double matrix[16], const double color[4], const std::string &label);
+	CSGTerm(const shared_ptr<PolySet> &polyset, const Transform3d &matrix, const double color[4], const std::string &label);
 	CSGTerm(type_e type, CSGTerm *left, CSGTerm *right);
 
 	CSGTerm *normalize();
@@ -40,14 +42,14 @@ class CSGChain
 {
 public:
 	std::vector<shared_ptr<PolySet> > polysets;
-	std::vector<double*> matrices;
+	std::vector<Transform3d> matrices;
 	std::vector<double*> colors;
 	std::vector<CSGTerm::type_e> types;
 	std::vector<std::string> labels;
 
 	CSGChain();
 
-	void add(const shared_ptr<PolySet> &polyset, double *m, double *color, CSGTerm::type_e type, std::string label);
+	void add(const shared_ptr<PolySet> &polyset, const Transform3d &m, double *color, CSGTerm::type_e type, std::string label);
 	void import(CSGTerm *term, CSGTerm::type_e type = CSGTerm::TYPE_UNION);
 	std::string dump();
 	std::string fulldump();
diff --git a/src/dxftess-glu.cc b/src/dxftess-glu.cc
index 23d8a45..4ad2051 100644
--- a/src/dxftess-glu.cc
+++ b/src/dxftess-glu.cc
@@ -4,13 +4,11 @@
 #include "grid.h"
 #include <stdio.h>
 
-#ifdef ENABLE_OPENCSG
-// this must be included before the GL headers
-#  include <GL/glew.h>
-#endif
-#include <qgl.h>
+#include "system-gl.h"
 #include "mathc99.h"
 
+#include <QVector>
+
 #ifdef WIN32
 #  define STDCALL __stdcall
 #else
diff --git a/src/editor.h b/src/editor.h
index c2f3333..3088d20 100644
--- a/src/editor.h
+++ b/src/editor.h
@@ -22,7 +22,7 @@ public slots:
 	//void zoomOut() { zoom(-1); } 
 	void zoomOut(int n = 1) { zoom(-n); } 
 #else
-	Editor(QWidget *parent) : QTextEdit(parent) {}
+	Editor(QWidget *parent) : QTextEdit(parent) { setAcceptRichText(false); }
 public slots:
 	void setLineWrapping(bool on) { if(on) setWordWrapMode(QTextOption::WrapAnywhere); }
 	void setContentModified(bool y) { document()->setModified(y); }
diff --git a/src/export.h b/src/export.h
index cba0b23..dd6e3e0 100644
--- a/src/export.h
+++ b/src/export.h
@@ -5,8 +5,7 @@
 
 #include <iostream>
 
-void cgal_nef3_to_polyset(class PolySet *ps, class CGAL_Nef_polyhedron *root_N);
-void export_stl(CGAL_Nef_polyhedron *root_N, std::ostream &output, class QProgressDialog *pd);
+void export_stl(class CGAL_Nef_polyhedron *root_N, std::ostream &output, class QProgressDialog *pd);
 void export_off(CGAL_Nef_polyhedron *root_N, std::ostream &output, QProgressDialog *pd);
 void export_dxf(CGAL_Nef_polyhedron *root_N, std::ostream &output, QProgressDialog *pd);
 #endif
diff --git a/src/func.cc b/src/func.cc
index b58a1b7..b011a27 100644
--- a/src/func.cc
+++ b/src/func.cc
@@ -27,7 +27,6 @@
 #include "function.h"
 #include "expression.h"
 #include "context.h"
-#include "dxfdim.h"
 #include "builtin.h"
 #include <sstream>
 #include <ctime>
@@ -354,7 +353,26 @@ Value builtin_lookup(const Context *, const std::vector<std::string>&, const std
 
 Value builtin_version(const Context *, const std::vector<std::string>&, const std::vector<Value> &)
 {
-	return Value(std::string(QUOTED(OPENSCAD_VERSION)));
+	Value val;
+	val.type = Value::VECTOR;
+	val.append(new Value(double(OPENSCAD_YEAR)));
+	val.append(new Value(double(OPENSCAD_MONTH)));
+#ifdef OPENSCAD_DAY
+	val.append(new Value(double(OPENSCAD_DAY)));
+#endif
+	return val;
+}
+
+Value builtin_version_num(const Context *ctx, const std::vector<std::string>& call_argnames, const std::vector<Value> &args)
+{
+	Value val = (args.size() == 0) ? builtin_version(ctx, call_argnames, args) : args[0];
+	double y, m, d = 0;
+	if (!val.getv3(y, m, d)) {
+		if (!val.getv2(y, m)) {
+			return Value();
+		}
+	}
+	return Value(y * 10000 + m * 100 + d);
 }
 
 void initialize_builtin_functions()
@@ -382,6 +400,7 @@ void initialize_builtin_functions()
 	builtin_functions["str"] = new BuiltinFunction(&builtin_str);
 	builtin_functions["lookup"] = new BuiltinFunction(&builtin_lookup);
 	builtin_functions["version"] = new BuiltinFunction(&builtin_version);
+	builtin_functions["version_num"] = new BuiltinFunction(&builtin_version_num);
 	initialize_builtin_dxf_dim();
 }
 
diff --git a/src/import.cc b/src/import.cc
index f64a8f6..d86a60d 100644
--- a/src/import.cc
+++ b/src/import.cc
@@ -228,7 +228,6 @@ std::string ImportNode::toString() const
 {
 	std::stringstream stream;
 
-	QString text;
 	struct stat st;
 	memset(&st, 0, sizeof(struct stat));
 	stat(this->filename.c_str(), &st);
diff --git a/src/linalg.h b/src/linalg.h
new file mode 100644
index 0000000..06991cf
--- /dev/null
+++ b/src/linalg.h
@@ -0,0 +1,13 @@
+#ifndef LINALG_H_
+#define LINALG_H_
+
+#include <Eigen/Core>
+#include <Eigen/Geometry>
+
+using Eigen::Vector3d;
+typedef Eigen::AlignedBox<double, 3> BoundingBox;
+using Eigen::Matrix3f;
+using Eigen::Matrix3d;
+using Eigen::Transform3d;
+
+#endif
diff --git a/src/linearextrude.cc b/src/linearextrude.cc
index 4ce87db..5c3b684 100644
--- a/src/linearextrude.cc
+++ b/src/linearextrude.cc
@@ -30,11 +30,6 @@
 #include "context.h"
 #include "printutils.h"
 #include "builtin.h"
-#include "dxfdata.h"
-#include "dxftess.h"
-#include "polyset.h"
-#include "progress.h"
-#include "visitor.h"
 #include "PolySetEvaluator.h"
 #include "openscad.h" // get_fragments_from_r()
 
@@ -124,7 +119,7 @@ void register_builtin_dxf_linear_extrude()
 	builtin_modules["linear_extrude"] = new LinearExtrudeModule();
 }
 
-PolySet *LinearExtrudeNode::evaluate_polyset(PolySetEvaluator *evaluator) const
+class PolySet *LinearExtrudeNode::evaluate_polyset(PolySetEvaluator *evaluator) const
 {
 	if (!evaluator) {
 		PRINTF("WARNING: No suitable PolySetEvaluator found for %s module!", this->name().c_str());
diff --git a/src/mainwin.cc b/src/mainwin.cc
index e287f0d..fafe8ed 100644
--- a/src/mainwin.cc
+++ b/src/mainwin.cc
@@ -33,13 +33,10 @@
 #include "polyset.h"
 #include "csgterm.h"
 #include "highlighter.h"
-#include "grid.h"
-#include "dxfdata.h"
-#include "dxfdim.h"
 #include "export.h"
 #include "builtin.h"
-#include "dxftess.h"
 #include "progress.h"
+#include "dxfdim.h"
 #ifdef ENABLE_OPENCSG
 #include "CSGTermEvaluator.h"
 #include "OpenCSGRenderer.h"
@@ -104,8 +101,7 @@ unsigned int GuiLocker::gui_locked = 0;
 #define QUOTED(x__) QUOTE(x__)
 
 static char helptitle[] =
-	"OpenSCAD " QUOTED(OPENSCAD_VERSION) " (www.openscad.org)\n"
-	"Visitor refactored version\n";
+	"OpenSCAD " QUOTED(OPENSCAD_VERSION) " (www.openscad.org)\n\n";
 static char copyrighttext[] =
 	"Copyright (C) 2009-2011 Marius Kintel <marius@kintel.net> and Clifford Wolf <clifford@clifford.at>\n"
 	"\n"
@@ -1087,12 +1083,14 @@ void MainWindow::pasteViewportRotation()
 
 void MainWindow::checkAutoReload()
 {
-	QString new_stinfo;
-	QFileInfo finfo(this->fileName);
-	new_stinfo = QString::number(finfo.size()) + QString::number(finfo.lastModified().toTime_t());
-	if (new_stinfo != autoReloadInfo)
-		actionReloadCompile();
-	autoReloadInfo = new_stinfo;
+	if (!this->fileName.isEmpty()) {
+		QString new_stinfo;
+		QFileInfo finfo(this->fileName);
+		new_stinfo = QString::number(finfo.size()) + QString::number(finfo.lastModified().toTime_t());
+		if (new_stinfo != autoReloadInfo)
+			actionReloadCompile();
+		autoReloadInfo = new_stinfo;
+	}
 }
 
 void MainWindow::autoReloadSet(bool on)
diff --git a/src/node.cc b/src/node.cc
index e2f3fa0..12a7ca4 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -24,17 +24,13 @@
  *
  */
 
-#include "printutils.h"
 #include "node.h"
 #include "module.h"
-#include "csgterm.h"
 #include "progress.h"
-#include "polyset.h"
 #include "visitor.h"
-#include "nodedumper.h"
 #include "stl-utils.h"
 
-#include <sstream>
+#include <iostream>
 #include <algorithm>
 
 size_t AbstractNode::idx_counter;
diff --git a/src/node.h b/src/node.h
index 9f25627..de5e6aa 100644
--- a/src/node.h
+++ b/src/node.h
@@ -3,7 +3,6 @@
 
 #include <vector>
 #include <string>
-
 #include "traverser.h"
 
 extern int progress_report_count;
diff --git a/src/nodedumper.cc b/src/nodedumper.cc
index d75c703..4523bac 100644
--- a/src/nodedumper.cc
+++ b/src/nodedumper.cc
@@ -1,13 +1,8 @@
 #include "nodedumper.h"
-#include <string>
-#include <map>
-#include <list>
-#include "visitor.h"
 #include "state.h"
-#include "nodecache.h"
 
+#include <string>
 #include <sstream>
-#include <iostream>
 #include <assert.h>
 
 /*!
@@ -42,7 +37,7 @@ void NodeDumper::handleIndent(const State &state)
 	including braces and indentation.
 	All children are assumed to be cached already.
  */
-string NodeDumper::dumpChildren(const AbstractNode &node)
+std::string NodeDumper::dumpChildren(const AbstractNode &node)
 {
 	std::stringstream dump;
 	if (!this->visitedchildren[node.index()].empty()) {
diff --git a/src/openscad.h b/src/openscad.h
index 9d97bac..e6b9b9f 100644
--- a/src/openscad.h
+++ b/src/openscad.h
@@ -27,11 +27,6 @@
 #ifndef OPENSCAD_H
 #define OPENSCAD_H
 
-#ifdef ENABLE_OPENCSG
-// this must be included before the GL headers
-#  include <GL/glew.h>
-#endif
-
 // for win32 and maybe others..
 #ifndef M_PI
 #  define M_PI 3.14159265358979323846
diff --git a/src/polyset.cc b/src/polyset.cc
index 23b9876..1d31005 100644
--- a/src/polyset.cc
+++ b/src/polyset.cc
@@ -25,14 +25,13 @@
  */
 
 #include "polyset.h"
-#include "printutils.h"
 // FIXME: Reenable/rewrite - don't be dependant on GUI
 // #include "Preferences.h"
 #ifdef ENABLE_CGAL
 #include <CGAL/assertions_behaviour.h>
 #include <CGAL/exceptions.h>
 #endif
-#include <Eigen/Core>
+#include "linalg.h"
 #include <Eigen/LU>
 #include <QColor>
 
@@ -113,13 +112,9 @@ static void gl_draw_triangle(GLint *shaderinfo, const Vector3d &p0, const Vector
 	}
 }
 
-void PolySet::render_surface(colormode_e colormode, csgmode_e csgmode, double *m, GLint *shaderinfo) const
+void PolySet::render_surface(colormode_e colormode, csgmode_e csgmode, const Transform3d &m, GLint *shaderinfo) const
 {
-	Eigen::Matrix3f m3f;
-	m3f << m[0], m[4], m[8],
-		m[1], m[5], m[9],
-		m[2], m[6], m[10];
-	bool mirrored = m3f.determinant() < 0;
+	bool mirrored = m.matrix().determinant() < 0;
 
 	if (colormode == COLORMODE_MATERIAL) {
 // FIXME: Reenable/rewrite - don't be dependant on GUI
diff --git a/src/polyset.h b/src/polyset.h
index 3cfb21a..57f5057 100644
--- a/src/polyset.h
+++ b/src/polyset.h
@@ -1,20 +1,11 @@
 #ifndef POLYSET_H_
 #define POLYSET_H_
 
-#ifndef __APPLE__
-#define EIGEN_DONT_VECTORIZE 1
-#define EIGEN_DISABLE_UNALIGNED_ARRAY_ASSERT 1
-#endif
-
-#include <GL/glew.h>
+#include "system-gl.h"
 #include "grid.h"
-#include <Eigen/Core>
-#include <Eigen/Geometry>
+#include "linalg.h"
 #include <vector>
 
-using Eigen::Vector3d;
-typedef Eigen::AlignedBox<double, 3> BoundingBox;
-
 class PolySet
 {
 public:
@@ -54,7 +45,7 @@ public:
 		CSGMODE_HIGHLIGHT_DIFFERENCE = 22
 	};
 
-	void render_surface(colormode_e colormode, csgmode_e csgmode, double *m, GLint *shaderinfo = NULL) const;
+	void render_surface(colormode_e colormode, csgmode_e csgmode, const Transform3d &m, GLint *shaderinfo = NULL) const;
 	void render_edges(colormode_e colormode, csgmode_e csgmode) const;
 };
 
diff --git a/src/primitives.cc b/src/primitives.cc
index 08b9c62..a651ff8 100644
--- a/src/primitives.cc
+++ b/src/primitives.cc
@@ -32,7 +32,6 @@
 #include "dxftess.h"
 #include "builtin.h"
 #include "printutils.h"
-#include <assert.h>
 #include "visitor.h"
 #include <sstream>
 #include <assert.h>
diff --git a/src/printutils.cc b/src/printutils.cc
index 01fa06b..a315ab3 100644
--- a/src/printutils.cc
+++ b/src/printutils.cc
@@ -1,5 +1,6 @@
 #include "printutils.h"
 #include <stdio.h>
+#include <QDate>
 
 QList<QString> print_messages_stack;
 OutputHandlerFunc *outputhandler = NULL;
diff --git a/src/printutils.h b/src/printutils.h
index 0432622..60cd12a 100644
--- a/src/printutils.h
+++ b/src/printutils.h
@@ -5,7 +5,6 @@
 #include <QList>
 #include <iostream>
 #include <QFileInfo>
-#include <QDateTime>
 
 typedef void (OutputHandlerFunc)(const QString &msg, void *userdata);
 extern OutputHandlerFunc *outputhandler;
diff --git a/src/projection.cc b/src/projection.cc
index 2c9d821..1333d19 100644
--- a/src/projection.cc
+++ b/src/projection.cc
@@ -29,19 +29,9 @@
 #include "context.h"
 #include "printutils.h"
 #include "builtin.h"
-#include "dxfdata.h"
-#include "dxftess.h"
-#include "polyset.h"
-#include "export.h"
-#include "progress.h"
 #include "visitor.h"
 #include "PolySetEvaluator.h"
 
-#ifdef ENABLE_CGAL
-#  include <CGAL/assertions_behaviour.h>
-#  include <CGAL/exceptions.h>
-#endif
-
 #include <assert.h>
 #include <sstream>
 #include <boost/assign/std/vector.hpp>
diff --git a/src/render.cc b/src/render.cc
index f08423a..b79fa56 100644
--- a/src/render.cc
+++ b/src/render.cc
@@ -28,9 +28,6 @@
 #include "module.h"
 #include "context.h"
 #include "builtin.h"
-#include "printutils.h"
-#include "progress.h"
-#include "visitor.h"
 #include "PolySetEvaluator.h"
 
 #include <sstream>
diff --git a/src/rotateextrude.cc b/src/rotateextrude.cc
index 3a6eb55..4d6de73 100644
--- a/src/rotateextrude.cc
+++ b/src/rotateextrude.cc
@@ -30,8 +30,6 @@
 #include "printutils.h"
 #include "builtin.h"
 #include "polyset.h"
-#include "dxfdata.h"
-#include "progress.h"
 #include "visitor.h"
 #include "PolySetEvaluator.h"
 #include "openscad.h" // get_fragments_from_r()
diff --git a/src/state.h b/src/state.h
index 69aee87..5dc74df 100644
--- a/src/state.h
+++ b/src/state.h
@@ -2,13 +2,14 @@
 #define STATE_H_
 
 #include <cstring>
+#include "linalg.h"
 
 class State
 {
 public:
   State(const class AbstractNode *parent) 
     : parentnode(parent), isprefix(false), ispostfix(false), numchildren(0) {
-		for (int i=0;i<16;i++) this->m[i] = i % 5 == 0 ? 1.0 : 0.0;
+		m = Transform3d::Identity();
 		for (int i=0;i<4;i++) this->c[i] = -1.0;
 	}
   virtual ~State() {}
@@ -17,14 +18,14 @@ public:
   void setPostfix(bool on) { this->ispostfix = on; }
   void setNumChildren(unsigned int numc) { this->numchildren = numc; }
   void setParent(const AbstractNode *parent) { this->parentnode = parent; }
-	void setMatrix(const double m[16]) { memcpy(this->m, m, 16*sizeof(double)); }
+	void setMatrix(const Transform3d &m) { this->m = m; }
 	void setColor(const double c[4]) { memcpy(this->c, c, 4*sizeof(double)); }
 
   bool isPrefix() const { return this->isprefix; }
   bool isPostfix() const { return this->ispostfix; }
   unsigned int numChildren() const { return this->numchildren; }
   const AbstractNode *parent() const { return this->parentnode; }
-	const double *matrix() const { return this->m; }
+	const Transform3d &matrix() const { return this->m; }
 	const double *color() const { return this->c; }
 
 private:
@@ -34,7 +35,7 @@ private:
   unsigned int numchildren;
 
 	// Transformation matrix and color. FIXME: Generalize such state variables?
-	double m[16];
+	Transform3d m;
 	double c[4];
 };
 
diff --git a/src/surface.cc b/src/surface.cc
index 35449ed..8349afd 100644
--- a/src/surface.cc
+++ b/src/surface.cc
@@ -29,7 +29,6 @@
 #include "polyset.h"
 #include "context.h"
 #include "builtin.h"
-#include "dxftess.h"
 #include "printutils.h"
 #include "handle_dep.h" // handle_dep()
 #include "visitor.h"
diff --git a/src/system-gl.h b/src/system-gl.h
new file mode 100644
index 0000000..cdbf3dc
--- /dev/null
+++ b/src/system-gl.h
@@ -0,0 +1,11 @@
+#ifndef SYSTEMGL_H_
+#define SYSTEMGL_H_
+
+#include <GL/glew.h>
+#ifdef __APPLE__
+#include <OpenGL/OpenGL.h>
+#else
+#include <GL/gl.h>
+#endif
+
+#endif
diff --git a/src/transform.cc b/src/transform.cc
index f473f6a..eda69c2 100644
--- a/src/transform.cc
+++ b/src/transform.cc
@@ -27,13 +27,8 @@
 #include "transformnode.h"
 #include "module.h"
 #include "context.h"
-#include "dxfdata.h"
-#include "csgterm.h"
 #include "polyset.h"
-#include "dxftess.h"
 #include "builtin.h"
-#include "printutils.h"
-#include "visitor.h"
 #include <sstream>
 #include <vector>
 #include <assert.h>
@@ -60,8 +55,7 @@ AbstractNode *TransformModule::evaluate(const Context *ctx, const ModuleInstanti
 {
 	TransformNode *node = new TransformNode(inst);
 
-	for (int i = 0; i < 16; i++)
-		node->matrix[i] = i % 5 == 0 ? 1.0 : 0.0;
+	node->matrix = Transform3d::Identity();
 
 	std::vector<std::string> argnames;
 	std::vector<Expression*> argexpr;
@@ -91,82 +85,50 @@ AbstractNode *TransformModule::evaluate(const Context *ctx, const ModuleInstanti
 
 	if (this->type == SCALE)
 	{
+		Vector3d scalevec(1,1,1);
 		Value v = c.lookup_variable("v");
-		v.getnum(node->matrix[0]);
-		v.getnum(node->matrix[5]);
-		v.getnum(node->matrix[10]);
-		v.getv3(node->matrix[0], node->matrix[5], node->matrix[10]);
-		if (node->matrix[10] <= 0)
-			node->matrix[10] = 1;
+		v.getnum(scalevec[0]);
+		v.getnum(scalevec[1]);
+		v.getnum(scalevec[2]);
+		v.getv3(scalevec[0], scalevec[1], scalevec[2]);
+		if (scalevec[2] == 0) scalevec[2] = 1;
+		node->matrix.scale(scalevec);
 	}
 	else if (this->type == ROTATE)
 	{
 		Value val_a = c.lookup_variable("a");
 		if (val_a.type == Value::VECTOR)
 		{
-			for (size_t i = 0; i < 3 && i < val_a.vec.size(); i++) {
-				double a;
-				val_a.vec[i]->getnum(a);
-				double c = cos(a*M_PI/180.0);
-				double s = sin(a*M_PI/180.0);
-				double x = i == 0, y = i == 1, z = i == 2;
-				double mr[16] = {
-					x*x*(1-c)+c,
-					y*x*(1-c)+z*s,
-					z*x*(1-c)-y*s,
-					0,
-					x*y*(1-c)-z*s,
-					y*y*(1-c)+c,
-					z*y*(1-c)+x*s,
-					0,
-					x*z*(1-c)+y*s,
-					y*z*(1-c)-x*s,
-					z*z*(1-c)+c,
-					0,
-					0, 0, 0, 1
-				};
-				double m[16];
-				for (int x = 0; x < 4; x++)
-				for (int y = 0; y < 4; y++)
-				{
-					m[x+y*4] = 0;
-					for (int i = 0; i < 4; i++)
-						m[x+y*4] += node->matrix[i+y*4] * mr[x+i*4];
-				}
-				for (int i = 0; i < 16; i++)
-					node->matrix[i] = m[i];
+			Eigen::AngleAxisd rotx, roty, rotz;
+			double a;
+			if (val_a.vec.size() > 0) {
+				val_a.vec[0]->getnum(a);
+				rotx = Eigen::AngleAxisd(a*M_PI/180, Vector3d::UnitX());
 			}
+			if (val_a.vec.size() > 1) {
+				val_a.vec[1]->getnum(a);
+				roty = Eigen::AngleAxisd(a*M_PI/180, Vector3d::UnitY());
+			}
+			if (val_a.vec.size() > 2) {
+				val_a.vec[2]->getnum(a);
+				rotz = Eigen::AngleAxisd(a*M_PI/180, Vector3d::UnitZ());
+			}
+			node->matrix.rotate(rotz * roty * rotx);
 		}
 		else
 		{
 			Value val_v = c.lookup_variable("v");
-			double a = 0, x = 0, y = 0, z = 1;
+			double a = 0;
 
 			val_a.getnum(a);
 
-			if (val_v.getv3(x, y, z)) {
-				if (x != 0.0 || y != 0.0 || z != 0.0) {
-					double sn = 1.0 / sqrt(x*x + y*y + z*z);
-					x *= sn, y *= sn, z *= sn;
-				}
+			Vector3d axis(0,0,1);
+			if (val_v.getv3(axis[0], axis[1], axis[2])) {
+				if (axis.squaredNorm() > 0) axis.normalize();
 			}
 
-			if (x != 0.0 || y != 0.0 || z != 0.0)
-			{
-				double c = cos(a*M_PI/180.0);
-				double s = sin(a*M_PI/180.0);
-
-				node->matrix[ 0] = x*x*(1-c)+c;
-				node->matrix[ 1] = y*x*(1-c)+z*s;
-				node->matrix[ 2] = z*x*(1-c)-y*s;
-
-				node->matrix[ 4] = x*y*(1-c)-z*s;
-				node->matrix[ 5] = y*y*(1-c)+c;
-				node->matrix[ 6] = z*y*(1-c)+x*s;
-
-				node->matrix[ 8] = x*z*(1-c)+y*s;
-				node->matrix[ 9] = y*z*(1-c)-x*s;
-				node->matrix[10] = z*z*(1-c)+c;
+			if (axis.squaredNorm() > 0) {
+				node->matrix = Eigen::AngleAxisd(a*M_PI/180, axis);
 			}
 		}
 	}
@@ -184,23 +146,20 @@ AbstractNode *TransformModule::evaluate(const Context *ctx, const ModuleInstanti
 
 		if (x != 0.0 || y != 0.0 || z != 0.0)
 		{
-			node->matrix[ 0] = 1-2*x*x;
-			node->matrix[ 1] = -2*y*x;
-			node->matrix[ 2] = -2*z*x;
-
-			node->matrix[ 4] = -2*x*y;
-			node->matrix[ 5] = 1-2*y*y;
-			node->matrix[ 6] = -2*z*y;
-
-			node->matrix[ 8] = -2*x*z;
-			node->matrix[ 9] = -2*y*z;
-			node->matrix[10] = 1-2*z*z;
+			Eigen::Matrix4d m;
+			m << 1-2*x*x, -2*y*x, -2*z*x, 0,
+				-2*x*y, 1-2*y*y, -2*z*y, 0,
+				-2*x*z, -2*y*z, 1-2*z*z, 0,
+				0, 0, 0, 1;
+			node->matrix = m;
 		}
 	}
 	else if (this->type == TRANSLATE)
 	{
 		Value v = c.lookup_variable("v");
-		v.getv3(node->matrix[12], node->matrix[13], node->matrix[14]);
+		Vector3d translatevec(0,0,0);
+		v.getv3(translatevec[0], translatevec[1], translatevec[2]);
+		node->matrix.translate(translatevec);
 	}
 	else if (this->type == MULTMATRIX)
 	{
@@ -209,7 +168,7 @@ AbstractNode *TransformModule::evaluate(const Context *ctx, const ModuleInstanti
 			for (int i = 0; i < 16; i++) {
 				size_t x = i / 4, y = i % 4;
 				if (y < v.vec.size() && v.vec[y]->type == Value::VECTOR && x < v.vec[y]->vec.size())
-					v.vec[y]->vec[x]->getnum(node->matrix[i]);
+					v.vec[y]->vec[x]->getnum(node->matrix(y, x));
 			}
 		}
 	}
@@ -229,7 +188,7 @@ std::string TransformNode::toString() const
 		stream << "[";
 		for (int i=0;i<4;i++) {
 			// FIXME: The 0 test is to avoid a leading minus before a single 0 (cosmetics)
-			stream << ((this->matrix[i*4+j]==0)?0:this->matrix[i*4+j]);
+			stream << ((this->matrix(j, i)==0)?0:this->matrix(j, i));
 			if (i != 3) stream << ", ";
 		}
 		stream << "]";
diff --git a/src/transformnode.h b/src/transformnode.h
index 9d822cb..29c6d43 100644
--- a/src/transformnode.h
+++ b/src/transformnode.h
@@ -3,6 +3,7 @@
 
 #include "node.h"
 #include "visitor.h"
+#include "linalg.h"
 
 class TransformNode : public AbstractNode
 {
@@ -14,7 +15,7 @@ public:
 	virtual std::string toString() const;
 	virtual std::string name() const;
 
-	double matrix[16];
+	Transform3d matrix;
 };
 
 #endif
diff --git a/testdata/scad/minimal/transform-insert.dxf b/testdata/dxf/transform-insert.dxf
index 40064c2..40064c2 100644
--- a/testdata/scad/minimal/transform-insert.dxf
+++ b/testdata/dxf/transform-insert.dxf
diff --git a/testdata/scad/dxf/arc.scad b/testdata/scad/dxf/arc.scad
new file mode 100644
index 0000000..fff70a3
--- /dev/null
+++ b/testdata/scad/dxf/arc.scad
@@ -0,0 +1 @@
+import("../../dxf/arc.dxf");
diff --git a/testdata/scad/dxf/circle-advanced.scad b/testdata/scad/dxf/circle-advanced.scad
new file mode 100644
index 0000000..801ea05
--- /dev/null
+++ b/testdata/scad/dxf/circle-advanced.scad
@@ -0,0 +1 @@
+import("../../dxf/circle-advanced.dxf");
diff --git a/testdata/scad/dxf/circle-double.scad b/testdata/scad/dxf/circle-double.scad
new file mode 100644
index 0000000..095c785
--- /dev/null
+++ b/testdata/scad/dxf/circle-double.scad
@@ -0,0 +1 @@
+import("../../dxf/circle-double.dxf");
diff --git a/testdata/scad/dxf/circle-small.scad b/testdata/scad/dxf/circle-small.scad
new file mode 100644
index 0000000..94f5fa4
--- /dev/null
+++ b/testdata/scad/dxf/circle-small.scad
@@ -0,0 +1 @@
+import("../../dxf/circle-small.dxf");
diff --git a/testdata/scad/dxf/circle.scad b/testdata/scad/dxf/circle.scad
new file mode 100644
index 0000000..8b5d132
--- /dev/null
+++ b/testdata/scad/dxf/circle.scad
@@ -0,0 +1 @@
+import("../../dxf/circle.dxf");
diff --git a/testdata/scad/dxf/ellipse-arc-rot.scad b/testdata/scad/dxf/ellipse-arc-rot.scad
new file mode 100644
index 0000000..4b3b603
--- /dev/null
+++ b/testdata/scad/dxf/ellipse-arc-rot.scad
@@ -0,0 +1 @@
+import("../../dxf/ellipse-arc-rot.dxf");
diff --git a/testdata/scad/dxf/ellipse-arc.scad b/testdata/scad/dxf/ellipse-arc.scad
new file mode 100644
index 0000000..4a43a16
--- /dev/null
+++ b/testdata/scad/dxf/ellipse-arc.scad
@@ -0,0 +1 @@
+import("../../dxf/ellipse-arc.dxf");
diff --git a/testdata/scad/dxf/ellipse-reverse.scad b/testdata/scad/dxf/ellipse-reverse.scad
new file mode 100644
index 0000000..646a74a
--- /dev/null
+++ b/testdata/scad/dxf/ellipse-reverse.scad
@@ -0,0 +1 @@
+import("../../dxf/ellipse-reverse.dxf");
diff --git a/testdata/scad/dxf/ellipse-rot.scad b/testdata/scad/dxf/ellipse-rot.scad
new file mode 100644
index 0000000..f2c872f
--- /dev/null
+++ b/testdata/scad/dxf/ellipse-rot.scad
@@ -0,0 +1 @@
+import("../../dxf/ellipse-rot.dxf");
diff --git a/testdata/scad/dxf/ellipse.scad b/testdata/scad/dxf/ellipse.scad
new file mode 100644
index 0000000..5b56d35
--- /dev/null
+++ b/testdata/scad/dxf/ellipse.scad
@@ -0,0 +1 @@
+import("../../dxf/ellipse.dxf");
diff --git a/testdata/scad/dxf/lwpolyline-closed.scad b/testdata/scad/dxf/lwpolyline-closed.scad
new file mode 100644
index 0000000..8408ac8
--- /dev/null
+++ b/testdata/scad/dxf/lwpolyline-closed.scad
@@ -0,0 +1 @@
+import("../../dxf/lwpolyline-closed.dxf");
diff --git a/testdata/scad/dxf/lwpolyline.scad b/testdata/scad/dxf/lwpolyline.scad
new file mode 100644
index 0000000..0a50787
--- /dev/null
+++ b/testdata/scad/dxf/lwpolyline.scad
@@ -0,0 +1 @@
+import("../../dxf/lwpolyline.dxf");
diff --git a/testdata/scad/dxf/lwpolyline2.scad b/testdata/scad/dxf/lwpolyline2.scad
new file mode 100644
index 0000000..c0bf16c
--- /dev/null
+++ b/testdata/scad/dxf/lwpolyline2.scad
@@ -0,0 +1 @@
+import("../../dxf/lwpolyline2.dxf");
diff --git a/testdata/scad/dxf/multiple-layers.scad b/testdata/scad/dxf/multiple-layers.scad
new file mode 100644
index 0000000..f32fdb1
--- /dev/null
+++ b/testdata/scad/dxf/multiple-layers.scad
@@ -0,0 +1 @@
+import("../../dxf/multiple-layers.dxf");
diff --git a/testdata/scad/dxf/polygon-concave-hole.scad b/testdata/scad/dxf/polygon-concave-hole.scad
new file mode 100644
index 0000000..65ee56f
--- /dev/null
+++ b/testdata/scad/dxf/polygon-concave-hole.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-concave-hole.dxf");
diff --git a/testdata/scad/dxf/polygon-concave-simple.scad b/testdata/scad/dxf/polygon-concave-simple.scad
new file mode 100644
index 0000000..8f9ad18
--- /dev/null
+++ b/testdata/scad/dxf/polygon-concave-simple.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-concave-simple.dxf");
diff --git a/testdata/scad/dxf/polygon-concave.scad b/testdata/scad/dxf/polygon-concave.scad
new file mode 100644
index 0000000..13db93c
--- /dev/null
+++ b/testdata/scad/dxf/polygon-concave.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-concave.dxf");
diff --git a/testdata/scad/dxf/polygon-holes-touch.scad b/testdata/scad/dxf/polygon-holes-touch.scad
new file mode 100644
index 0000000..f716bb9
--- /dev/null
+++ b/testdata/scad/dxf/polygon-holes-touch.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-holes-touch.dxf");
diff --git a/testdata/scad/dxf/polygon-intersect.scad b/testdata/scad/dxf/polygon-intersect.scad
new file mode 100644
index 0000000..a1060fa
--- /dev/null
+++ b/testdata/scad/dxf/polygon-intersect.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-intersect.dxf");
diff --git a/testdata/scad/dxf/polygon-many-holes.scad b/testdata/scad/dxf/polygon-many-holes.scad
new file mode 100644
index 0000000..0ea3324
--- /dev/null
+++ b/testdata/scad/dxf/polygon-many-holes.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-many-holes.dxf");
diff --git a/testdata/scad/dxf/polygon-mesh.scad b/testdata/scad/dxf/polygon-mesh.scad
new file mode 100644
index 0000000..af3e372
--- /dev/null
+++ b/testdata/scad/dxf/polygon-mesh.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-mesh.dxf");
diff --git a/testdata/scad/dxf/polygon-overlap.scad b/testdata/scad/dxf/polygon-overlap.scad
new file mode 100644
index 0000000..2958f5a
--- /dev/null
+++ b/testdata/scad/dxf/polygon-overlap.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-overlap.dxf");
diff --git a/testdata/scad/dxf/polygon-riser.scad b/testdata/scad/dxf/polygon-riser.scad
new file mode 100644
index 0000000..7607258
--- /dev/null
+++ b/testdata/scad/dxf/polygon-riser.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-riser.dxf");
diff --git a/testdata/scad/dxf/polygon-self-intersect.scad b/testdata/scad/dxf/polygon-self-intersect.scad
new file mode 100644
index 0000000..e4764b3
--- /dev/null
+++ b/testdata/scad/dxf/polygon-self-intersect.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon-self-intersect.dxf");
diff --git a/testdata/scad/dxf/polygon8.scad b/testdata/scad/dxf/polygon8.scad
new file mode 100644
index 0000000..d17a77a
--- /dev/null
+++ b/testdata/scad/dxf/polygon8.scad
@@ -0,0 +1 @@
+import("../../dxf/polygon8.dxf");
diff --git a/testdata/scad/dxf/polygons.scad b/testdata/scad/dxf/polygons.scad
new file mode 100644
index 0000000..90fe14b
--- /dev/null
+++ b/testdata/scad/dxf/polygons.scad
@@ -0,0 +1 @@
+import("../../dxf/polygons.dxf");
diff --git a/testdata/scad/dxf/transform-insert.scad b/testdata/scad/dxf/transform-insert.scad
new file mode 100644
index 0000000..22a0132
--- /dev/null
+++ b/testdata/scad/dxf/transform-insert.scad
@@ -0,0 +1 @@
+import("../../dxf/transform-insert.dxf");
diff --git a/testdata/scad/dxf/triangle-with-duplicate-vertex.scad b/testdata/scad/dxf/triangle-with-duplicate-vertex.scad
new file mode 100644
index 0000000..d7dfe74
--- /dev/null
+++ b/testdata/scad/dxf/triangle-with-duplicate-vertex.scad
@@ -0,0 +1 @@
+import("../../dxf/triangle-with-duplicate-vertex.dxf");
diff --git a/testdata/scad/features/transform-tests.scad b/testdata/scad/features/transform-tests.scad
index a591695..e2dd71e 100644
--- a/testdata/scad/features/transform-tests.scad
+++ b/testdata/scad/features/transform-tests.scad
@@ -5,6 +5,7 @@ module mycyl() {
 translate([25,0,0]) scale([1,2,0.5]) mycyl();
 translate([20,-30,0]) scale(0.5) mycyl();
 translate([0,-20,0]) rotate([90,0,0]) mycyl();
+translate([0,-40,0]) rotate([90,0,45]) mycyl();
 rotate(v=[-1,0,0], a=45) mycyl();
 multmatrix([[1,0,0,-25],
             [0,1,0,0],
@@ -15,4 +16,4 @@ multmatrix([[1,0.4,0.1,-25],
             [0.2,0.2,0.5,0],
             [0,0,0,1]]) mycyl();
 
-//FIXME: mirror()
\ No newline at end of file
+//FIXME: mirror() and scale()
\ No newline at end of file
diff --git a/testdata/scad/minimal/allfunctions.scad b/testdata/scad/minimal/allfunctions.scad
index c33b43c..ef21a90 100644
--- a/testdata/scad/minimal/allfunctions.scad
+++ b/testdata/scad/minimal/allfunctions.scad
@@ -23,3 +23,4 @@ a = lookup();
 a = dxf_dim();
 a = dxf_cross();
 a = version();
+a = version_num();
diff --git a/testdata/scad/minimal/transform-insert.scad b/testdata/scad/minimal/transform-insert.scad
deleted file mode 100644
index 1237bb2..0000000
--- a/testdata/scad/minimal/transform-insert.scad
+++ /dev/null
@@ -1 +0,0 @@
-import_dxf("transform-insert.dxf");
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 9e6ae0a..4ef7bf3 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -93,7 +93,7 @@ set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/parser_yacc.c PROPERTIES
 # Internal includes
 include_directories(../src)
 
-add_definitions(-DOPENSCAD_VERSION=test)
+add_definitions(-DOPENSCAD_VERSION=test -DOPENSCAD_YEAR=2011 -DOPENSCAD_MONTH=10)
 
 set(COMMON_SOURCES
   ../src/handle_dep.cc 
@@ -241,6 +241,7 @@ enable_testing()
 file(GLOB MINIMAL_FILES ${CMAKE_SOURCE_DIR}/../testdata/scad/minimal/*.scad)
 file(GLOB FEATURES_FILES ${CMAKE_SOURCE_DIR}/../testdata/scad/features/*.scad)
 file(GLOB BUGS_FILES ${CMAKE_SOURCE_DIR}/../testdata/scad/bugs/*.scad)
+file(GLOB SCAD_DXF_FILES ${CMAKE_SOURCE_DIR}/../testdata/scad/dxf/*.scad)
 
 # Add dumptest tests to CTest
 add_cmdline_test(dumptest txt ${MINIMAL_FILES})
@@ -287,6 +288,7 @@ LIST(APPEND CGALPNGTEST_FILES
             ${CMAKE_SOURCE_DIR}/../testdata/scad/features/include-tests.scad
             ${CMAKE_SOURCE_DIR}/../testdata/scad/features/child-tests.scad
             ${CMAKE_SOURCE_DIR}/../testdata/scad/features/ifelse-tests.scad)
+LIST(APPEND CGALPNGTEST_FILES ${SCAD_DXF_FILES})
 #LIST(APPEND CGALPNGTEST_FILES ${CMAKE_SOURCE_DIR}/../examples/example001.scad)
 add_cmdline_test(cgalpngtest png ${CGALPNGTEST_FILES})
 
@@ -295,6 +297,7 @@ LIST(APPEND OPENCSGTEST_FILES ${CGALPNGTEST_FILES})
 LIST(APPEND OPENCSGTEST_FILES 
             ${CMAKE_SOURCE_DIR}/../testdata/scad/features/highlight-and-background-modifier.scad
             ${CMAKE_SOURCE_DIR}/../testdata/scad/features/child-background.scad)
+LIST(APPEND OPENCSGTEST_FILES ${SCAD_DXF_FILES})
 add_cmdline_test(opencsgtest png ${OPENCSGTEST_FILES})
 
 # Add throwntogether tests to CTest
diff --git a/tests/csgtermtest.cc b/tests/csgtermtest.cc
index eec5d4b..7688fc7 100644
--- a/tests/csgtermtest.cc
+++ b/tests/csgtermtest.cc
@@ -26,7 +26,6 @@
 #include "myqhash.h"
 #include "PolySetEvaluator.h"
 #include "CSGTermEvaluator.h"
-#include "CSGTextCache.h"
 #include "openscad.h"
 #include "handle_dep.h"
 #include "node.h"
@@ -144,8 +143,8 @@ int main(int argc, char **argv)
 
 //	cout << tree.getString(*root_node) << "\n";
 
-	vector<CSGTerm*> highlights;
-	vector<CSGTerm*> background;
+	std::vector<CSGTerm*> highlights;
+	std::vector<CSGTerm*> background;
 	PolySetEvaluator psevaluator(tree);
 	CSGTermEvaluator evaluator(tree, &psevaluator);
 	CSGTerm *root_term = evaluator.evaluateCSGTerm(*root_node, highlights, background);
diff --git a/tests/regression/cgalpngtest/arc-expected.png b/tests/regression/cgalpngtest/arc-expected.png
new file mode 100644
index 0000000..2f555c4
--- /dev/null
+++ b/tests/regression/cgalpngtest/arc-expected.png
diff --git a/tests/regression/cgalpngtest/circle-advanced-expected.png b/tests/regression/cgalpngtest/circle-advanced-expected.png
new file mode 100644
index 0000000..3b31c78
--- /dev/null
+++ b/tests/regression/cgalpngtest/circle-advanced-expected.png
diff --git a/tests/regression/cgalpngtest/circle-double-expected.png b/tests/regression/cgalpngtest/circle-double-expected.png
new file mode 100644
index 0000000..17e6b39
--- /dev/null
+++ b/tests/regression/cgalpngtest/circle-double-expected.png
diff --git a/tests/regression/cgalpngtest/circle-expected.png b/tests/regression/cgalpngtest/circle-expected.png
new file mode 100644
index 0000000..aacf12d
--- /dev/null
+++ b/tests/regression/cgalpngtest/circle-expected.png
diff --git a/tests/regression/cgalpngtest/circle-small-expected.png b/tests/regression/cgalpngtest/circle-small-expected.png
new file mode 100644
index 0000000..bc2a75b
--- /dev/null
+++ b/tests/regression/cgalpngtest/circle-small-expected.png
diff --git a/tests/regression/cgalpngtest/ellipse-arc-expected.png b/tests/regression/cgalpngtest/ellipse-arc-expected.png
new file mode 100644
index 0000000..561619b
--- /dev/null
+++ b/tests/regression/cgalpngtest/ellipse-arc-expected.png
diff --git a/tests/regression/cgalpngtest/ellipse-arc-rot-expected.png b/tests/regression/cgalpngtest/ellipse-arc-rot-expected.png
new file mode 100644
index 0000000..7a2ef89
--- /dev/null
+++ b/tests/regression/cgalpngtest/ellipse-arc-rot-expected.png
diff --git a/tests/regression/cgalpngtest/ellipse-expected.png b/tests/regression/cgalpngtest/ellipse-expected.png
new file mode 100644
index 0000000..384cb6b
--- /dev/null
+++ b/tests/regression/cgalpngtest/ellipse-expected.png
diff --git a/tests/regression/cgalpngtest/ellipse-reverse-expected.png b/tests/regression/cgalpngtest/ellipse-reverse-expected.png
new file mode 100644
index 0000000..e5a7b10
--- /dev/null
+++ b/tests/regression/cgalpngtest/ellipse-reverse-expected.png
diff --git a/tests/regression/cgalpngtest/ellipse-rot-expected.png b/tests/regression/cgalpngtest/ellipse-rot-expected.png
new file mode 100644
index 0000000..2c68ae2
--- /dev/null
+++ b/tests/regression/cgalpngtest/ellipse-rot-expected.png
diff --git a/tests/regression/cgalpngtest/lwpolyline-closed-expected.png b/tests/regression/cgalpngtest/lwpolyline-closed-expected.png
new file mode 100644
index 0000000..d0376c9
--- /dev/null
+++ b/tests/regression/cgalpngtest/lwpolyline-closed-expected.png
diff --git a/tests/regression/cgalpngtest/lwpolyline-expected.png b/tests/regression/cgalpngtest/lwpolyline-expected.png
new file mode 100644
index 0000000..d0376c9
--- /dev/null
+++ b/tests/regression/cgalpngtest/lwpolyline-expected.png
diff --git a/tests/regression/cgalpngtest/lwpolyline2-expected.png b/tests/regression/cgalpngtest/lwpolyline2-expected.png
new file mode 100644
index 0000000..f01f339
--- /dev/null
+++ b/tests/regression/cgalpngtest/lwpolyline2-expected.png
diff --git a/tests/regression/cgalpngtest/multiple-layers-expected.png b/tests/regression/cgalpngtest/multiple-layers-expected.png
new file mode 100644
index 0000000..680729b
--- /dev/null
+++ b/tests/regression/cgalpngtest/multiple-layers-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-concave-expected.png b/tests/regression/cgalpngtest/polygon-concave-expected.png
new file mode 100644
index 0000000..e1c68ef
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-concave-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-concave-hole-expected.png b/tests/regression/cgalpngtest/polygon-concave-hole-expected.png
new file mode 100644
index 0000000..eb11557
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-concave-hole-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-concave-simple-expected.png b/tests/regression/cgalpngtest/polygon-concave-simple-expected.png
new file mode 100644
index 0000000..14808ca
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-concave-simple-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-holes-touch-expected.png b/tests/regression/cgalpngtest/polygon-holes-touch-expected.png
new file mode 100644
index 0000000..ef2507c
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-holes-touch-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-intersect-expected.png b/tests/regression/cgalpngtest/polygon-intersect-expected.png
new file mode 100644
index 0000000..6f4f437
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-intersect-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-many-holes-expected.png b/tests/regression/cgalpngtest/polygon-many-holes-expected.png
new file mode 100644
index 0000000..2527af9
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-many-holes-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-mesh-expected.png b/tests/regression/cgalpngtest/polygon-mesh-expected.png
new file mode 100644
index 0000000..6f4f437
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-mesh-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-overlap-expected.png b/tests/regression/cgalpngtest/polygon-overlap-expected.png
new file mode 100644
index 0000000..6f4f437
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-overlap-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-riser-expected.png b/tests/regression/cgalpngtest/polygon-riser-expected.png
new file mode 100644
index 0000000..ce9ca69
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-riser-expected.png
diff --git a/tests/regression/cgalpngtest/polygon-self-intersect-expected.png b/tests/regression/cgalpngtest/polygon-self-intersect-expected.png
new file mode 100644
index 0000000..6f4f437
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon-self-intersect-expected.png
diff --git a/tests/regression/cgalpngtest/polygon8-expected.png b/tests/regression/cgalpngtest/polygon8-expected.png
new file mode 100644
index 0000000..8b480c0
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygon8-expected.png
diff --git a/tests/regression/cgalpngtest/polygons-expected.png b/tests/regression/cgalpngtest/polygons-expected.png
new file mode 100644
index 0000000..a30fcb6
--- /dev/null
+++ b/tests/regression/cgalpngtest/polygons-expected.png
diff --git a/tests/regression/cgalpngtest/transform-insert-expected.png b/tests/regression/cgalpngtest/transform-insert-expected.png
new file mode 100644
index 0000000..12867cc
--- /dev/null
+++ b/tests/regression/cgalpngtest/transform-insert-expected.png
diff --git a/tests/regression/cgalpngtest/transform-tests-expected.png b/tests/regression/cgalpngtest/transform-tests-expected.png
index 08cfce8..77c52e7 100644
--- a/tests/regression/cgalpngtest/transform-tests-expected.png
+++ b/tests/regression/cgalpngtest/transform-tests-expected.png
diff --git a/tests/regression/cgalpngtest/triangle-with-duplicate-vertex-expected.png b/tests/regression/cgalpngtest/triangle-with-duplicate-vertex-expected.png
new file mode 100644
index 0000000..8dd4de0
--- /dev/null
+++ b/tests/regression/cgalpngtest/triangle-with-duplicate-vertex-expected.png
diff --git a/tests/regression/csgtermtest/transform-insert-expected.txt b/tests/regression/csgtermtest/transform-insert-expected.txt
deleted file mode 100644
index 847d6c3..0000000
--- a/tests/regression/csgtermtest/transform-insert-expected.txt
+++ /dev/null
@@ -1 +0,0 @@
-import2
diff --git a/tests/regression/csgtexttest/transform-insert-expected.txt b/tests/regression/csgtexttest/transform-insert-expected.txt
deleted file mode 100644
index a673ddb..0000000
--- a/tests/regression/csgtexttest/transform-insert-expected.txt
+++ /dev/null
@@ -1 +0,0 @@
-group1(import)
diff --git a/tests/regression/dumptest/transform-insert-expected.txt b/tests/regression/dumptest/transform-insert-expected.txt
deleted file mode 100644
index 758c9e1..0000000
--- a/tests/regression/dumptest/transform-insert-expected.txt
+++ /dev/null
@@ -1,3 +0,0 @@
-group() {
-	import_dxf(file = "/Users/kintel/code/OpenSCAD/openscad-visitor/testdata/scad/minimal/transform-insert.dxf", cache = "4e39fca1.4329", layer = "", origin = [ 0 0 ], scale = 1, convexity = 1, $fn = 0, $fa = 12, $fs = 1);
-}
diff --git a/tests/regression/opencsgtest/arc-expected.png b/tests/regression/opencsgtest/arc-expected.png
new file mode 100644
index 0000000..a930c0e
--- /dev/null
+++ b/tests/regression/opencsgtest/arc-expected.png
diff --git a/tests/regression/opencsgtest/circle-advanced-expected.png b/tests/regression/opencsgtest/circle-advanced-expected.png
new file mode 100644
index 0000000..9dfbd61
--- /dev/null
+++ b/tests/regression/opencsgtest/circle-advanced-expected.png
diff --git a/tests/regression/opencsgtest/circle-double-expected.png b/tests/regression/opencsgtest/circle-double-expected.png
new file mode 100644
index 0000000..81caba5
--- /dev/null
+++ b/tests/regression/opencsgtest/circle-double-expected.png
diff --git a/tests/regression/opencsgtest/circle-expected.png b/tests/regression/opencsgtest/circle-expected.png
new file mode 100644
index 0000000..7bc63b1
--- /dev/null
+++ b/tests/regression/opencsgtest/circle-expected.png
diff --git a/tests/regression/opencsgtest/circle-small-expected.png b/tests/regression/opencsgtest/circle-small-expected.png
new file mode 100644
index 0000000..9813b20
--- /dev/null
+++ b/tests/regression/opencsgtest/circle-small-expected.png
diff --git a/tests/regression/opencsgtest/ellipse-arc-expected.png b/tests/regression/opencsgtest/ellipse-arc-expected.png
new file mode 100644
index 0000000..551630d
--- /dev/null
+++ b/tests/regression/opencsgtest/ellipse-arc-expected.png
diff --git a/tests/regression/opencsgtest/ellipse-arc-rot-expected.png b/tests/regression/opencsgtest/ellipse-arc-rot-expected.png
new file mode 100644
index 0000000..6b2a8e6
--- /dev/null
+++ b/tests/regression/opencsgtest/ellipse-arc-rot-expected.png
diff --git a/tests/regression/opencsgtest/ellipse-expected.png b/tests/regression/opencsgtest/ellipse-expected.png
new file mode 100644
index 0000000..70ccad2
--- /dev/null
+++ b/tests/regression/opencsgtest/ellipse-expected.png
diff --git a/tests/regression/opencsgtest/ellipse-reverse-expected.png b/tests/regression/opencsgtest/ellipse-reverse-expected.png
new file mode 100644
index 0000000..56c4710
--- /dev/null
+++ b/tests/regression/opencsgtest/ellipse-reverse-expected.png
diff --git a/tests/regression/opencsgtest/ellipse-rot-expected.png b/tests/regression/opencsgtest/ellipse-rot-expected.png
new file mode 100644
index 0000000..598caa1
--- /dev/null
+++ b/tests/regression/opencsgtest/ellipse-rot-expected.png
diff --git a/tests/regression/opencsgtest/lwpolyline-closed-expected.png b/tests/regression/opencsgtest/lwpolyline-closed-expected.png
new file mode 100644
index 0000000..c29d554
--- /dev/null
+++ b/tests/regression/opencsgtest/lwpolyline-closed-expected.png
diff --git a/tests/regression/opencsgtest/lwpolyline-expected.png b/tests/regression/opencsgtest/lwpolyline-expected.png
new file mode 100644
index 0000000..c29d554
--- /dev/null
+++ b/tests/regression/opencsgtest/lwpolyline-expected.png
diff --git a/tests/regression/opencsgtest/lwpolyline2-expected.png b/tests/regression/opencsgtest/lwpolyline2-expected.png
new file mode 100644
index 0000000..bdcb048
--- /dev/null
+++ b/tests/regression/opencsgtest/lwpolyline2-expected.png
diff --git a/tests/regression/opencsgtest/multiple-layers-expected.png b/tests/regression/opencsgtest/multiple-layers-expected.png
new file mode 100644
index 0000000..1ba71bf
--- /dev/null
+++ b/tests/regression/opencsgtest/multiple-layers-expected.png
diff --git a/tests/regression/opencsgtest/polygon-concave-expected.png b/tests/regression/opencsgtest/polygon-concave-expected.png
new file mode 100644
index 0000000..130a5e6
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-concave-expected.png
diff --git a/tests/regression/opencsgtest/polygon-concave-hole-expected.png b/tests/regression/opencsgtest/polygon-concave-hole-expected.png
new file mode 100644
index 0000000..22f035c
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-concave-hole-expected.png
diff --git a/tests/regression/opencsgtest/polygon-concave-simple-expected.png b/tests/regression/opencsgtest/polygon-concave-simple-expected.png
new file mode 100644
index 0000000..cf0569c
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-concave-simple-expected.png
diff --git a/tests/regression/opencsgtest/polygon-holes-touch-expected.png b/tests/regression/opencsgtest/polygon-holes-touch-expected.png
new file mode 100644
index 0000000..f72a36d
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-holes-touch-expected.png
diff --git a/tests/regression/opencsgtest/polygon-intersect-expected.png b/tests/regression/opencsgtest/polygon-intersect-expected.png
new file mode 100644
index 0000000..6f4f437
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-intersect-expected.png
diff --git a/tests/regression/opencsgtest/polygon-many-holes-expected.png b/tests/regression/opencsgtest/polygon-many-holes-expected.png
new file mode 100644
index 0000000..cdbeae4
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-many-holes-expected.png
diff --git a/tests/regression/opencsgtest/polygon-mesh-expected.png b/tests/regression/opencsgtest/polygon-mesh-expected.png
new file mode 100644
index 0000000..6f4f437
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-mesh-expected.png
diff --git a/tests/regression/opencsgtest/polygon-overlap-expected.png b/tests/regression/opencsgtest/polygon-overlap-expected.png
new file mode 100644
index 0000000..6f4f437
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-overlap-expected.png
diff --git a/tests/regression/opencsgtest/polygon-riser-expected.png b/tests/regression/opencsgtest/polygon-riser-expected.png
new file mode 100644
index 0000000..3513481
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-riser-expected.png
diff --git a/tests/regression/opencsgtest/polygon-self-intersect-expected.png b/tests/regression/opencsgtest/polygon-self-intersect-expected.png
new file mode 100644
index 0000000..6f4f437
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon-self-intersect-expected.png
diff --git a/tests/regression/opencsgtest/polygon8-expected.png b/tests/regression/opencsgtest/polygon8-expected.png
new file mode 100644
index 0000000..5ee7c85
--- /dev/null
+++ b/tests/regression/opencsgtest/polygon8-expected.png
diff --git a/tests/regression/opencsgtest/polygons-expected.png b/tests/regression/opencsgtest/polygons-expected.png
new file mode 100644
index 0000000..3ad971f
--- /dev/null
+++ b/tests/regression/opencsgtest/polygons-expected.png
diff --git a/tests/regression/opencsgtest/transform-insert-expected.png b/tests/regression/opencsgtest/transform-insert-expected.png
new file mode 100644
index 0000000..1d88a08
--- /dev/null
+++ b/tests/regression/opencsgtest/transform-insert-expected.png
diff --git a/tests/regression/opencsgtest/transform-tests-expected.png b/tests/regression/opencsgtest/transform-tests-expected.png
index 9c763ba..dc43942 100644
--- a/tests/regression/opencsgtest/transform-tests-expected.png
+++ b/tests/regression/opencsgtest/transform-tests-expected.png
diff --git a/tests/regression/opencsgtest/triangle-with-duplicate-vertex-expected.png b/tests/regression/opencsgtest/triangle-with-duplicate-vertex-expected.png
new file mode 100644
index 0000000..393de76
--- /dev/null
+++ b/tests/regression/opencsgtest/triangle-with-duplicate-vertex-expected.png