Mount rotation offset

Okay, let's imagine you want to mount one object to another and have it track the rotation. Easy enough to do.

But let's say that you want to offset that mount's rotation by a certain amount. ie: A turret is attached to a ship, but you don't want it to face in the same direction as the ship but 45 degrees offset. As far as I can tell, this is impossible in T2D currently -- even with multiple mounts. (As soon as you set it to track rotation, that object's rotation is "overwritten" by the parent.)

I propose a mount rotation offset. This will let you maintain an independant angle for the mounted object, while also have it track the parent's rotation.

Actually, I've done more than just proposed it, I've implemented it in my T2D copy. For example, in fxSceneObject2D::updateMount(), I've changed this:

if ( mMountTrackRotation )
		setRotation( -mpMountedTo->getRotation() + mMountOffsetRotation ); // DAVIDG

I set mMountOffsetRotation using the usual ConsoleFunction/public method combo. ie:

//-----------------------------------------------------------------------------
// Set Mount Offset Rotation.
//-----------------------------------------------------------------------------
// DAVIDG
ConsoleMethod(fxSceneObject2D, setMountOffsetRotation, void, 3, 3, "(rotation) - Sets the mount objects rotation.")
{
	// Set Rotation.
	object->setMountOffsetRotation( dAtof(argv[2]) );

	// Update Container Configuration.
	object->updateContainerConfig();
}   
// Set Rotation.
// DAVIDG
void fxSceneObject2D::setMountOffsetRotation( F32 rotation )
{
	// Set Position.
	mMountOffsetRotation = rotation;
}

And with a slight mod to the constructor (fxSceneObject2D::fxSceneObject2D()):

mMountOffsetRotation = 0.0 ;  // DAVIDG

And finally, add "F32 mMountOffsetRotation" to the public declaration of fxSceneObject2D.

This isn't a drop-in implementation, as it currently doesn't write this value to the file stream (and therefore breaks the state save/load capacity, plus future networking), but that's fairly easy to add if you need it.

Anyway, I needed this for my project and thought I'd share it as a future feature for T2D. :)