Как вращать камеру с помощью мыши по оси X, а не Y не сдвигая 3D модель?
Есть следующий код который вращает камеру вокруг 3D модели но модель постоянно сдвигается то влево то вправо то перемещается вверх за пределы окна и вращается очень быстро как это исправить? Как задать центр вращения.
3D Tools Trackball смотрел там такие же проблемы.
| Код |
AxisAngleRotation3D rotate;
public MainWindow()
{
InitializeComponent();
}
Point mouseLastPosition;
double mouseDeltaFactor = 10.00;
double scaleFactor = 1;
Point3D currentPosition;
Vector3D lookDirection;
private void Viewport3D_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
mouseLastPosition = e.GetPosition(this);
}
private void Viewport3D_MouseMove(object sender, MouseEventArgs e)
{
if (Mouse.LeftButton == MouseButtonState.Pressed)
{
Point newMousePosition = e.GetPosition(this);
if (mouseLastPosition.X != newMousePosition.X)
{
HorizontalTransform(mouseLastPosition.X < newMousePosition.X, mouseDeltaFactor);
}
if (mouseLastPosition.Y != newMousePosition.Y)
{
// VerticalTransform(mouseLastPosition.Y > newMousePosition.Y, mouseDeltaFactor);
}
mouseLastPosition = newMousePosition;
}
}
private void VerticalTransform(bool upDown, double angleDeltaFactor)
{
Vector3D postion = new Vector3D(DefCamera.Position.X, DefCamera.Position.Y, DefCamera.Position.Z);
Vector3D rotateAxis = Vector3D.CrossProduct(postion, DefCamera.UpDirection);
RotateTransform3D rt3d = new RotateTransform3D();
rotate = new AxisAngleRotation3D(rotateAxis, angleDeltaFactor * (upDown ? -1 : 1));
rt3d.Rotation = rotate;
Matrix3D matrix = rt3d.Value;
Point3D newPostition = matrix.Transform(DefCamera.Position);
DefCamera.Position = newPostition;
DefCamera.LookDirection = new Vector3D(-newPostition.X, -newPostition.Y, -newPostition.Z);
Vector3D newUpDirection = Vector3D.CrossProduct(DefCamera.LookDirection, rotateAxis);
newUpDirection.Normalize();
DefCamera.UpDirection = newUpDirection;
}
private void HorizontalTransform(bool leftRight, double angleDeltaFactor)
{
Vector3D postion = new Vector3D(DefCamera.Position.X, DefCamera.Position.Y, DefCamera.Position.Z);
Vector3D rotateAxis = DefCamera.UpDirection;
RotateTransform3D rt3d = new RotateTransform3D();
AxisAngleRotation3D rotate = new AxisAngleRotation3D(rotateAxis, angleDeltaFactor * (leftRight ? -1 : 1));
rt3d.Rotation = rotate;
Matrix3D matrix = rt3d.Value;
Point3D newPostition = matrix.Transform(DefCamera.Position);
DefCamera.Position = newPostition;
DefCamera.LookDirection = new Vector3D(-newPostition.X, -newPostition.Y, -newPostition.Z);
}
private void Viewport3D_MouseWheel(object sender, MouseWheelEventArgs e)
{
lookDirection.Normalize();
currentPosition = DefCamera.Position;
lookDirection = DefCamera.LookDirection;
System.Diagnostics.Debug.WriteLine(e.Delta.ToString());
lookDirection *= scaleFactor;
if (e.Delta == 90)
{
if ((currentPosition.X + lookDirection.X) * currentPosition.X > 0)
{
currentPosition += lookDirection;
}
}
if (e.Delta == -90)
{
currentPosition -= lookDirection;
}
}
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