rotation gizmo, multi-object support

you can now switch between the translation gizmo, and the rotation gizmo, and click between objects to change what one has the gizmo active
 
the gizmo also stays locked to the selected meshes’ local axes, i might add switching between local and global axis orientation at some point, but for right now local only is good enough
 
all of the gizmo mesh is generated from code, not as an obj, making it very efficient and fast and robust, but making the logic that generates vertices in the right position was very annoying lol

next, ill probably work on an inspector panel where you can edit an object’s location, rotation, scale, material data, etc
 
or maybe saving the scene to file

but now you can move and rotate any amount of objects to your heart’s content