STKMesh: Force readonly materials.

We never changed materials on the fly but better safe than sorry.

src/graphics/stkmesh.cpp

@@ -150,7 +150,7 @@ STKMesh::STKMesh(irr::scene::IMesh* mesh, ISceneNode* parent, irr::scene::IScene
 	const irr::core::vector3df& scale) :
 		CMeshSceneNode(mesh, parent, mgr, id, position, rotation, scale)
 {
-	createGLMeshes();
+    setMesh(mesh);
 }
 
 void STKMesh::createGLMeshes()
@@ -185,11 +185,18 @@ void STKMesh::cleanGLMeshes()
 
 void STKMesh::setMesh(irr::scene::IMesh* mesh)
 {
+    CMeshSceneNode::setReadOnlyMaterials(true);
 	CMeshSceneNode::setMesh(mesh);
 	cleanGLMeshes();
 	createGLMeshes();
 }
 
+void STKMesh::setReadOnlyMaterials(bool readonly)
+{
+    if (!readonly)
+        Log::error("STKMesh", "Cannot set non read only material, use setMesh instead");
+}
+
 STKMesh::~STKMesh()
 {
 	cleanGLMeshes();
@@ -982,7 +989,8 @@ void STKMesh::render()
 		scene::IMeshBuffer* mb = Mesh->getMeshBuffer(i);
 		if (mb)
 		{
-			const video::SMaterial& material = ReadOnlyMaterials ? mb->getMaterial() : Materials[i];				
+            assert(isReadOnlyMaterials());
+            const video::SMaterial& material = Materials[i];
 
 			video::IMaterialRenderer* rnd = driver->getMaterialRenderer(material.MaterialType);
 			bool transparent = (rnd && rnd->isTransparent());

src/graphics/stkmesh.hpp

@@ -73,6 +73,7 @@ public:
 		const irr::core::vector3df& scale = irr::core::vector3df(1.0f, 1.0f, 1.0f));
 	virtual void render();
 	virtual void setMesh(irr::scene::IMesh* mesh);
+    void setReadOnlyMaterials(bool readonly);
 	~STKMesh();
 };