private void OnMouseMove(object sender, MouseEventArgs e)
{
if (!_mouseLMBDown)
{
return;
}
var position = e.GetPosition(this);
var movement = position - _previousPosition;
_previousPosition = position;
if (Keyboard.IsKeyDown(Key.LeftShift))
{
MoveSceneUsingMouse(movement);
return;
}
var rotationMatrix = Transformations3D.RotationY(0.005 * movement.X)
* Transformations3D.RotationX(0.005 * movement.Y);
_worldTransformation = rotationMatrix * _worldTransformation;
RefreshImage();
}
public Matrix4X4 GetWorldMatrix()
{
var translation = Transformations3D.Translation((Vector3D)Position);
var rotation = Transformations3D.RotationX(Orientation.X)
* Transformations3D.RotationY(Orientation.Y)
* Transformations3D.RotationZ(Orientation.Z);
var scaling = Transformations3D.Scaling(Scale);
return(translation * rotation * scaling);
}
public Matrix4X4 GetViewMatrix()
{
var scale = Transformations3D.Scaling(Zoom);
var translation = Transformations3D.Translation(-(Vector3D)Position);
var rotation = Transformations3D.RotationX(XRotation) *
Transformations3D.RotationY(YRotation);
var d = Transformations3D.Translation(new Vector3D(0, 0, ObserverOffset));
var invd = Transformations3D.Translation(new Vector3D(0, 0, -ObserverOffset));
return(scale * invd * rotation * d * translation);
}
public Matrix4X4 GetViewMatrix()
{
var vec = new Vector3D(0, 0, -1);
var transform = Transformations3D.Scaling(Zoom)
* Transformations3D.RotationY(YRotation)
* Transformations3D.RotationX(XRotation);
var eye = (Point3D)(vec.ExtendTo4D().Transform(transform));
return(Transformations3D.LookAt(
eye,
new Point3D(0, 0, 0),
new Vector3D(0, 1, 0)));
}