Manipulating Objects Using Cursor

In GameTSCtrl.cpp:

// Dave's resource told me to put this in
void GameTSCtrl::onMouseDown(const GuiEvent &evt)
{
        MatrixF mat;
	Point3F vel;
	[b]mMouseDown = true;                          // Toggle tracks if mouse button was pressed down
	mouseLock();                              // defined in GuiControl.cpp, let's me jump into 3DMouse ops
	mHitMousePos = evt.mousePoint;[/b]     // Track where the mouse was clicked on screen

       ...        // The rest of the function contains code from Dave's resource
}

// New mouse event not usually found in GameTSCtrl
[b]void GameTSCtrl::onMouseDragged(const GuiEvent &event)
{
	make3DMouseEvent(mLastEvent, event);      // Copied from WorldEditor
	on3DMouseDragged(mLastEvent);                 // New mouse event not usually called in GameTSCtrl
}
[/b]


// *NOTE*: EVERYTHING BELOW THIS LINE IS NEW CODE
// SO I'M NOT GOING TO USE BOLD, EXCEPT WHERE MY PROBLEM IS
void GameTSCtrl::on3DMouseDragged(const Gui3DMouseEvent2 & event)
{
        // Instantiate my CustomSelector class
	CustomSelector* mSelector = CustomSelector::Instance();
	mLastRotation = 0.f;
	
        // Get centroid, extract the Euler, and find out what object we are manipulating
	mHitCentroid = mSelector->getCentroid();
	mHitRotation = extractEuler(mSelector->getObjByIndex(0)->getTransform());
	mHitObject = mSelector->getObjByIndex(0);

	// If the object exists, let's do stuff to it
	if(mSelector[0].getId())
	{
		// Determine the current movement mode based on the modifiers:
		if( event.modifier & SI_ALT )
		{
			// it's either rotate or scale
			// probably rotate more often... so rotate = ALT, scale = ALT CTRL
			if(event.modifier & SI_CTRL)
				mCurrentMode = Scale;          // Probably won't be using this
			else
				mCurrentMode = Rotate;
		}
		else
			mCurrentMode = Move;

// Are we moving or rotating, let's make a stripped down switch statement similiar to
// what is found in WorldEditor::on3DMouseDragged(), starting at line 2038 of worldEditor.cpp
		switch(mCurrentMode)
		{
                        [b]
			case Move:
			{
			CollisionInfo info;
			collide(event, info);
			mHitInfo = info;
			F32 cos = mDot(event.vec, Point3F(0,0,-1));
			F32 a = event.pos.z - mHitInfo.pos.z;
			mHitOffset = mHitInfo.pos - mSelector->getCentroid();
			setCursor(HandCursor);
			if(cos != 0.f)
			{
				F32 c = a / cos;
				Point3F projPnt = event.vec * c;
				projPnt += event.pos;
				projPnt -= mHitOffset;

				//
				F32 z = projPnt.z;
                                // *NOTE* before I started using snapPoint
                                //  the in game object would just shake a little in place
                                // after inplementing snapPoint, the object WOULD
                                // move noticeably once, then start shaking
				projPnt = snapPoint(projPnt);
				projPnt.z = z;

				mSelector->offset(projPnt - mSelector->getCentroid());
				updateClientTransforms(*mSelector);
			}
			break;
		}[/b]
			case Rotate:
			{
			// default to z axis
			S32 axis = 2;
			F32 angle = (event.mousePoint.x - mHitMousePos.x) * mMouseRotateScale;

			EulerF rot(0.f, 0.f, 0.f);
			((F32*)rot)[axis] = (angle - mLastRotation);

			Point3F centroid = mSelector->getCentroid();

			mSelector->rotate(rot, centroid);
			updateClientTransforms(*mSelector);

			mLastRotation = angle;
			break;
			}
		}
	}
}

1. Selecting an object using mouse cursor
2. Highlighting selected object
3. Dragging and rotating selected object around screen
4. Displaying animated/3D disembodied hand in the world representing cursor (like Black and White)

1. 3D Hand & Selected Object don't "play nice", fight for positioning
2. Highlighting uses debug bounding box, which doesn't display properly with scaled objects.  Need to use lighting based method.
3. Rotation is way too fast, and offset variable for rotation amount is not being resest.
4. Translate occasionally skips

1. Multiple selection of objects (exists, just need to implement)
2. De-select objects (exists, just need to implement)
3. Moving interiors (not sure if I should even try, but might be fun)
4. Applying physics to movements, like Black & White or Oblivion.

1. Use in my [url=http://www.garagegames.com/mg/forums/result.thread.php?qt=51911]Custom Mission Editor[/url]
2. Player interaction with world objects for all kits (FPS, RTS, ect)
3. Motion based games (if you have a P5)

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