/// <inheritdoc />
protected override void InputOnMouseDown(object sender, IMouseEventArgs args)
{
base.InputOnMouseDown(sender, args);
if (args.Buttons != MouseButtons.Middle || args.ClickCount > 1)
{
return;
}
MouseDownCameraInfo = RenderHost.CameraInfo.Cloned();
MouseDownView = MouseDownCameraInfo.GetTransformationMatrix(Space.Screen, Space.View).Transform(args.Position.ToPoint3D());
OrbitOrigin = GetOrbitOrigin(MouseDownCameraInfo);
}
protected override void InputOnMouseDown(object sender, IMouseEventArgs args)
{
base.InputOnMouseDown(sender, args);
if (args.Buttons != MouseButtons.Right)
{
return;
}
MouseDownCameraInfo = RenderHost.CameraInfo.Cloned();
var panOrigin = GetPanOrigin(MouseDownCameraInfo);
MouseDownPlane = new Plane(panOrigin, MouseDownCameraInfo.GetEyeDirection());
var mouseRay = MouseDownCameraInfo.GetMouseRay(Space.Screen, args.Position.ToPoint3D());
MouseDownOnPlane = MouseDownPlane.Value.IntersectionWith(mouseRay);
}
protected override void InputOnMouseMove(object sender, IMouseEventArgs args)
{
base.InputOnMouseMove(sender, args);
if (MouseDownCameraInfo is null || !MouseDownPlane.HasValue || !MouseDownOnPlane.HasValue)
{
return;
}
var mouseRay = MouseDownCameraInfo.GetMouseRay(Space.Screen, args.Position.ToPoint3D());
var mouseMoveOnPlane = MouseDownPlane.Value.IntersectionWith(mouseRay);
var offset = mouseMoveOnPlane - MouseDownOnPlane.Value;
var target = MouseDownCameraInfo.Target - offset;
var position = MouseDownCameraInfo.Position - offset;
var cameraInfo = RenderHost.CameraInfo;
RenderHost.CameraInfo = new CameraInfo(position, target, cameraInfo.UpVector, cameraInfo.Projection.Cloned(), cameraInfo.Viewport);
}