1 files changed, 21 insertions, 4 deletions
diff --git a/src/PolySetRenderer.h b/src/PolySetRenderer.h
index cff528f..ddd692f 100644
--- a/src/PolySetRenderer.h
+++ b/src/PolySetRenderer.h
@@ -2,20 +2,37 @@
 #define POLYSETRENDERER_H_
 
 #include "node.h"
+#include <QCache>
 
 class PolySetRenderer
 {
 public:
 	enum RenderMode { RENDER_CGAL, RENDER_OPENCSG };
-	PolySetRenderer() {}
+	PolySetRenderer() : cache(100) {}
+
 	virtual ~PolySetRenderer() {}
 
-	virtual PolySet *renderPolySet(const class ProjectionNode &node, AbstractPolyNode::render_mode_e) = 0;
-	virtual PolySet *renderPolySet(const class DxfLinearExtrudeNode &node, AbstractPolyNode::render_mode_e) = 0;
-	virtual PolySet *renderPolySet(const class DxfRotateExtrudeNode &node, AbstractPolyNode::render_mode_e) = 0;
+	virtual PolySet *renderPolySet(const class ProjectionNode &, AbstractPolyNode::render_mode_e) = 0;
+	virtual PolySet *renderPolySet(const class DxfLinearExtrudeNode &, AbstractPolyNode::render_mode_e) = 0;
+	virtual PolySet *renderPolySet(const class DxfRotateExtrudeNode &, AbstractPolyNode::render_mode_e) = 0;
+
+	void clearCache() {
+		this->cache.clear();
+	}
 
 	static PolySetRenderer *renderer() { return global_renderer; }
 	static void setRenderer(PolySetRenderer *r) { global_renderer = r; }
+protected:
+
+	struct cache_entry {
+		class PolySet *ps;
+		QString msg;
+		cache_entry(PolySet *ps);
+		~cache_entry();
+	};
+
+	QCache<QString, cache_entry> cache;
+
 private:
 	static PolySetRenderer *global_renderer;
 };