public virtual void MouseDrag()
{
// mouse press
if(Input.GetMouseButtonDown(0) && mouseJoint == null)
{
FSBody body = GetBodyAtMouse();
if(body != null)
{
FVector2 target = new FVector2(MouseXWorldPhys, MouseYWorldPhys);
mouseJoint = JointFactory.CreateFixedMouseJoint(FSWorldComponent.PhysicsWorld, body, target);
mouseJoint.CollideConnected = false;
mouseJoint.MaxForce = MaxForce * body.Mass;
mouseJoint.DampingRatio = 0.1f;
body.Awake = true;
}
}
// mouse release
if(Input.GetMouseButtonUp(0))
{
if(mouseJoint != null)
{
FSWorldComponent.PhysicsWorld.RemoveJoint(mouseJoint);
mouseJoint = null;
}
}
// mouse move
if(mouseJoint != null)
{
FVector2 p2 = new FVector2(MouseXWorldPhys, MouseYWorldPhys);
mouseJoint.WorldAnchorB = p2;
}
}
public static FSFixedMouseJoint CreateFixedMouseJoint(FSWorld world, FSBody body, FVector2 target)
{
FSFixedMouseJoint joint = new FSFixedMouseJoint(body, target);
world.AddJoint(joint);
return joint;
}
