private void MoveSceneUsingMouse(Vector movement)
{
var translation = Transformations3D.Translation(new Vector3D(movement.X * 0.001, movement.Y * 0.001, 0));
_worldTransformation = translation * _worldTransformation;
RefreshImage();
}
private Matrix4X4 GetProjectionMatrix(PerspectiveType perspectiveType)
{
var camera = Scene?.Camera;
if (camera == null)
{
return(Matrix4X4.Identity);
}
var aspectMatrix = Transformations3D.Scaling(new Vector3D(1.0 / _aspectRatio, 1.0, 1.0));
Matrix4X4 projection;
switch (perspectiveType)
{
case PerspectiveType.Standard:
projection = aspectMatrix * camera.GetPerspectiveMatrix();
break;
case PerspectiveType.LeftEye:
projection = aspectMatrix * camera.GetPerspectiveMatrix(-EyeDistance);
break;
case PerspectiveType.RightEye:
projection = aspectMatrix * camera.GetPerspectiveMatrix(+EyeDistance);
break;
default:
throw new ArgumentOutOfRangeException(nameof(perspectiveType), perspectiveType, null);
}
return(projection);
}
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();
}
private void OnMouseWheel(object sender, MouseWheelEventArgs e)
{
var scalingFactor = Math.Max(0, 1.0 + e.Delta * 0.002);
var scalingMatrix = Transformations3D.Scaling(scalingFactor);
_worldTransformation = scalingMatrix * _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)));
}
private void OnKeyDown(object sender, KeyEventArgs e)
{
switch (e.Key)
{
case Key.A:
_worldTransformation = Transformations3D.Translation(new Vector3D(0, 0, +0.5)) * _worldTransformation;
RefreshImage();
break;
case Key.Z:
_worldTransformation = Transformations3D.Translation(new Vector3D(0, 0, -0.5)) * _worldTransformation;
RefreshImage();
break;
}
}
public Matrix4X4 GetPerspectiveMatrix(double xEyeShift = 0)
{
return(Transformations3D.SimplePerspectiveWithEyeShift(2.0, xEyeShift));
}
public Matrix4X4 GetPerspectiveMatrix(double xEyeShift)
{
return(Transformations3D.SimplePerspectiveWithEyeShift(ObserverOffset, xEyeShift));
}
