// Holding the mouse button and dragging the mouse changes the "roll" angle (y-axis) and the direction from which sunlight is coming (x-axis).
public override void MouseDown(NSEvent theEvent)
{
bool dragging = true;
PointF windowPoint;
PointF lastWindowPoint = theEvent.LocationInWindow;
float dx, dy;
bool wasAnimating = isAnimating;
if (wasAnimating)
{
stopAnimation();
}
while (dragging)
{
theEvent = openGLView.Window.NextEventMatchingMask(NSEventMask.LeftMouseUp | NSEventMask.LeftMouseDragged);
windowPoint = theEvent.LocationInWindow;
switch (theEvent.Type)
{
case NSEventType.LeftMouseUp:
dragging = false;
break;
case NSEventType.LeftMouseDragged:
dx = windowPoint.X - lastWindowPoint.X;
dy = windowPoint.Y - lastWindowPoint.Y;
Scene.SunAngle = Scene.SunAngle - 1 * dx;
Scene.RollAngle = Scene.RollAngle - 0.5f * dy;
lastWindowPoint = windowPoint;
if (isInFullScreenMode)
{
fullScreenView.Display();
}
else
{
openGLView.Display();
}
break;
default:
break;
}
}
if (wasAnimating)
{
startAnimation();
RenderTime = DateTime.Now.TimeOfDay.TotalMilliseconds;
}
}
