Change addShadowVolumeSceneNode to replace the current shadow completely. This...

Change addShadowVolumeSceneNode to replace the current shadow completely. This allows to change the shadow parameters, such that a call to addShadowVolumeSceneNode will always result in the correct shadow. Note that redundant calls to this method will be quite expensive now, so avoid them.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@3477 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/CAnimatedMeshSceneNode.cpp

@@ -559,18 +559,18 @@ u32 CAnimatedMeshSceneNode::getMaterialCount() const
 
 //! Creates shadow volume scene node as child of this node
 //! and returns a pointer to it.
-IShadowVolumeSceneNode* CAnimatedMeshSceneNode::addShadowVolumeSceneNode(const IMesh* shadowMesh,
-						 s32 id, bool zfailmethod, f32 infinity)
+IShadowVolumeSceneNode* CAnimatedMeshSceneNode::addShadowVolumeSceneNode(
+		const IMesh* shadowMesh, s32 id, bool zfailmethod, f32 infinity)
 {
 	if (!SceneManager->getVideoDriver()->queryFeature(video::EVDF_STENCIL_BUFFER))
 		return 0;
 
-	if (Shadow)
-		return Shadow;
-
 	if (!shadowMesh)
 		shadowMesh = Mesh; // if null is given, use the mesh of node
 
+	if (Shadow)
+		Shadow->drop();
+
 	Shadow = new CShadowVolumeSceneNode(shadowMesh, this, SceneManager, id,  zfailmethod, infinity);
 	return Shadow;
 }