Clifford Wolf:

	Compilation to CSG tree is working now



git-svn-id: http://svn.clifford.at/openscad/trunk@6 b57f626f-c46c-0410-a088-ec61d464b74c

1 files changed, 71 insertions, 0 deletions

diff --git a/difference.cc b/difference.cc
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+/*
+ *  OpenSCAD (www.openscad.at)
+ *  Copyright (C) 2009  Clifford Wolf <clifford@clifford.at>
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+#define INCLUDE_ABSTRACT_NODE_DETAILS
+
+#include "openscad.h"
+
+class DifferenceModule : public AbstractModule
+{
+public:
+	virtual AbstractNode *evaluate(const Context *ctx, const QVector<QString> &call_argnames, const QVector<Value> &call_argvalues, const QVector<AbstractNode*> child_nodes) const;
+};
+
+class DifferenceNode : public AbstractNode
+{
+public:
+        virtual CGAL_Nef_polyhedron render_cgal_nef_polyhedron() const;
+        virtual QString dump(QString indent) const;
+};
+
+AbstractNode *DifferenceModule::evaluate(const Context*, const QVector<QString>&, const QVector<Value>&, const QVector<AbstractNode*> child_nodes) const
+{
+	DifferenceNode *node = new DifferenceNode();
+	foreach (AbstractNode *v, child_nodes)
+		node->children.append(v);
+	return node;
+}
+
+CGAL_Nef_polyhedron DifferenceNode::render_cgal_nef_polyhedron() const
+{
+	bool first = true;
+	CGAL_Nef_polyhedron N;
+	foreach (AbstractNode *v, children) {
+		if (first)
+			N = v->render_cgal_nef_polyhedron();
+		else
+			N -= v->render_cgal_nef_polyhedron();
+	}
+	return N;
+}
+
+QString DifferenceNode::dump(QString indent) const
+{
+	QString text = indent + "difference() {\n";
+	foreach (AbstractNode *v, children)
+		text += v->dump(indent + QString("\t"));
+	return text + indent + "}\n";
+}
+
+void register_builtin_difference()
+{
+	builtin_modules["difference"] = new DifferenceModule();
+}
+