private LinearMath.Vector ScreenToWorld(Point point)
{
double dx = (viewPort.Camera as OrthographicCamera).Width / viewPort.ActualWidth;
LinearMath.Vector v = new LinearMath.Vector(3);
v[0] = (point.X - viewPort.ActualWidth / 2.0) * dx + (viewPort.Camera as OrthographicCamera).Position.X;
v[1] = (viewPort.ActualHeight / 2.0 - point.Y) * dx + (viewPort.Camera as OrthographicCamera).Position.Y;
return(v);
}
private void OnMouseUp(object sender, EventArgs arg)
{
if (arg is MouseButtonEventArgs)
{
if ((arg as MouseButtonEventArgs).MiddleButton == MouseButtonState.Released)
{
vect = null;
}
}
}
private void OnMouseDown(object sender, EventArgs arg)
{
if (arg is MouseButtonEventArgs)
{
if ((arg as MouseButtonEventArgs).MiddleButton == MouseButtonState.Pressed)
{
Point p = (arg as MouseEventArgs).GetPosition(sender as Grid);
vect = ScreenToWorld(p);
}
}
}
private void OnMouseMove(object sender, EventArgs arg)
{
if (arg is MouseEventArgs)
{
if (vect != null)
{
Point p = (arg as MouseEventArgs).GetPosition(sender as Grid);
LinearMath.Vector dif = ScreenToWorld(p) - vect;
double X = (viewPort.Camera as OrthographicCamera).Position.X - dif[0];
double Y = (viewPort.Camera as OrthographicCamera).Position.Y - dif[1];
double Z = (viewPort.Camera as OrthographicCamera).Position.Z;
(viewPort.Camera as OrthographicCamera).Position = new Point3D(X, Y, Z);
}
}
}