Radegast.Rendering.SceneWindow.glControl_MouseMove C# (CSharp) Method

        private void glControl_MouseMove(object sender, MouseEventArgs e)
        {
            if (dragging)
            {
                int deltaX = e.X - dragX;
                int deltaY = e.Y - dragY;
                float pixelToM = 1f / 75f;
                if (e.Button == MouseButtons.Left)
                {
                    if (ModifierKeys == Keys.None)
                    {
                        //Only touch if we arn't doing anything else
                        object picked;
                        int LeftclickedFaceID;
                        if (TryPick(e.X, e.Y, out picked, out LeftclickedFaceID))
                        {
                            if (picked is RenderPrimitive)
                                TryTouchObject((RenderPrimitive)picked);
                        }
                        else
                            TryEndTouchObject();
                    }

                    // Pan
                    if (ModifierKeys == Keys.Control || ModifierKeys == (Keys.Alt | Keys.Control | Keys.Shift))
                    {
                        Camera.Pan(deltaX * pixelToM * 2, deltaY * pixelToM * 2);
                    }

                    // Alt-zoom (up down move camera closer to target, left right rotate around target)
                    if (ModifierKeys == Keys.Alt)
                    {
                        Camera.MoveToTarget(deltaY * pixelToM);
                        Camera.Rotate(-deltaX * pixelToM, true);
                    }

                    // Rotate camera in a vertical circle around target on up down mouse movement
                    if (ModifierKeys == (Keys.Alt | Keys.Control))
                    {
                        Camera.Rotate(deltaY * pixelToM, false);
                        Camera.Rotate(-deltaX * pixelToM, true);
                    }
                }

                dragX = e.X;
                dragY = e.Y;
            }
        }