LiveScene: Added setOp to avoid recreating LiveScene ( and throwing cache away )

Author: lucienfostier

include/IECoreNuke/LiveScene.h

@@ -111,6 +111,9 @@ class IECORENUKE_API LiveScene : public IECoreScene::SceneInterface
 		static double timeToFrame( const double& time );
 		static double frameToTime( const int& frame );
 
+		void setOp( DD::Image::GeoOp* op );
+		const DD::Image::GeoOp *getOp() const;
+
 		private:
 
 		DD::Image::GeoOp *op() const;

src/IECoreNuke/LiveScene.cpp

@@ -94,7 +94,13 @@ LiveScene::~LiveScene()
 {
 }
 
-GeoOp *LiveScene::op() const
+void LiveScene::setOp( DD::Image::GeoOp* op )
+{
+	m_op = op;
+	m_objectPathMap.clear();
+}
+
+const GeoOp *LiveScene::getOp() const
 {
 	return m_op;
 }