[2.3] Derived Position appears to be wrong when InheritScale is false

[crjc]

System Information

• Operating System / Platform: MacOS 11
• RenderSystem: Metal

Detailed description

Position that I'm getting back from _getDerivedPositionUpdated seems to be very wrong when Inherit Scale is off.

Sample code

Creates 3 cubes, the 3rd cube is purely to visualise the output of _getDerivedPositionUpdated from the second cube.

    Ogre::Item* item = sceneManager->createItem( "Cube_d.mesh",
                                     Ogre::ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME,
                                     Ogre::SCENE_DYNAMIC );
    
    auto node1 = sceneManager->getRootSceneNode( Ogre::SCENE_DYNAMIC )->
            createChildSceneNode( Ogre::SCENE_DYNAMIC );
    node1->setPosition(0, 0, 0);
    node1->setScale(2, 2, 2);
    node1->attachObject( item );
    


    item = sceneManager->createItem( "Cube_d.mesh",
                                     Ogre::ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME,
                                     Ogre::SCENE_DYNAMIC );
    
    auto node2 = sceneManager->createSceneNode();
    node2->setPosition(0, 4, 0);
    node2->setScale(1, 1, 1);
    node2->attachObject( item );
    node2->setInheritScale(false);

     // node 2 is nested inside of node 1
    node1->addChild(node2);
    


    item = sceneManager->createItem( "Cube_d.mesh",
                                     Ogre::ResourceGroupManager::AUTODETECT_RESOURCE_GROUP_NAME,
                                     Ogre::SCENE_DYNAMIC );
    
    auto node3 = sceneManager->getRootSceneNode( Ogre::SCENE_DYNAMIC )->
            createChildSceneNode( Ogre::SCENE_DYNAMIC );
    node3->setPosition(node2->_getDerivedPositionUpdated() + Ogre::Vector3(5, 0, 0));
    node3->setScale(1, 1, 1);
    node3->attachObject( item );

Screenshots

When node2->setInheritScale(false) is commented:

When node2->setInheritScale(false) is present: (note how the 3rd node no longer matches the y position of the second node)