private static Matrix3D GetViewMatrix(ProjectionCamera camera)
{
if (camera == null) throw new ArgumentNullException("camera");
// This math is identical to what you find documented for
// D3DXMatrixLookAtRH with the exception that WPF uses a
// LookDirection vector rather than a LookAt point.
Vector3D zAxis = -camera.LookDirection;
zAxis.Normalize();
Vector3D xAxis = Vector3D.CrossProduct(camera.UpDirection, zAxis);
xAxis.Normalize();
Vector3D yAxis = Vector3D.CrossProduct(zAxis, xAxis);
Vector3D position = (Vector3D)camera.Position;
double offsetX = -Vector3D.DotProduct(xAxis, position);
double offsetY = -Vector3D.DotProduct(yAxis, position);
double offsetZ = -Vector3D.DotProduct(zAxis, position);
Matrix3D m = new Matrix3D(
xAxis.X, yAxis.X, zAxis.X, 0,
xAxis.Y, yAxis.Y, zAxis.Y, 0,
xAxis.Z, yAxis.Z, zAxis.Z, 0,
offsetX, offsetY, offsetZ, 1);
return m;
}
private static void PositionPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ProjectionCamera target = ((ProjectionCamera)d);
target.PropertyChanged(PositionProperty);
}
private static Matrix3D GetViewMatrix(ProjectionCamera camera)
{
Debug.Assert(camera != null,
"Caller needs to ensure camera is non-null.");
// This math is identical to what you find documented for
// D3DXMatrixLookAtRH with the exception that WPF uses a
// LookDirection vector rather than a LookAt point.
Vector3D zAxis = -camera.LookDirection;
zAxis.Normalize();
Vector3D xAxis = Vector3D.CrossProduct(camera.UpDirection, zAxis);
xAxis.Normalize();
Vector3D yAxis = Vector3D.CrossProduct(zAxis, xAxis);
Vector3D position = (Vector3D)camera.Position;
double offsetX = -Vector3D.DotProduct(xAxis, position);
double offsetY = -Vector3D.DotProduct(yAxis, position);
double offsetZ = -Vector3D.DotProduct(zAxis, position);
return new Matrix3D(
xAxis.X, yAxis.X, zAxis.X, 0,
xAxis.Y, yAxis.Y, zAxis.Y, 0,
xAxis.Z, yAxis.Z, zAxis.Z, 0,
offsetX, offsetY, offsetZ, 1);
}
private static void FarPlaneDistancePropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ProjectionCamera target = ((ProjectionCamera)d);
target.PropertyChanged(FarPlaneDistanceProperty);
}
public CameraController(Camera c, IListLayout l, PointLight p)
{
camera = (ProjectionCamera)c;
layout = l;
light = p;
try
{
Transform3DGroup group = camera.Transform as Transform3DGroup;
RotateTransform3D rot = group.Children[0] as RotateTransform3D;
cameraRotX = rot.Rotation as AxisAngleRotation3D;
rot = group.Children[1] as RotateTransform3D;
cameraRotY = rot.Rotation as AxisAngleRotation3D;
rot = group.Children[2] as RotateTransform3D;
cameraRotZ = rot.Rotation as AxisAngleRotation3D;
}
catch (Exception )
{
System.Diagnostics.Debug.WriteLine("camera transformations are wrong!!!");
}
try
{
Transform3DGroup group = light.Transform as Transform3DGroup;
RotateTransform3D rot = group.Children[0] as RotateTransform3D;
lightRotX = rot.Rotation as AxisAngleRotation3D;
rot = group.Children[1] as RotateTransform3D;
lightRotY = rot.Rotation as AxisAngleRotation3D;
rot = group.Children[2] as RotateTransform3D;
lightRotZ = rot.Rotation as AxisAngleRotation3D;
}
catch (Exception )
{
System.Diagnostics.Debug.WriteLine("light transformations are wrong!!!");
}
}
/// <summary>
/// Create a MatrixCamera from an existing ProjectionCamera
/// </summary>
/// <param name="camera">Camera</param>
/// <param name="width">Viewport height</param>
/// <param name="height">Viewport width</param>
/// <returns>MatrixCamera</returns>
public static MatrixCamera CreateMatrixCamera( ProjectionCamera camera, double width, double height )
{
MatrixCamera matrixCamera = new MatrixCamera(
CreateViewMatrix( camera ),
CreateProjectionMatrix( camera, width, height, camera.NearPlaneDistance, camera.FarPlaneDistance ) );
matrixCamera.Transform = camera.Transform;
return matrixCamera;
}
/// <summary>
/// Create a MatrixCamera from an existing ProjectionCamera
/// </summary>
/// <param name="camera">Camera</param>
/// <param name="width">Viewport height</param>
/// <param name="height">Viewport width</param>
/// <param name="near">Near plane distance</param>
/// <param name="far">Far plane distance</param>
/// <returns>MatrixCamera</returns>
public static MatrixCamera CreateMatrixCamera( ProjectionCamera camera, double width, double height, double near, double far )
{
MatrixCamera matrixCamera = new MatrixCamera(
CreateViewMatrix( camera ),
CreateProjectionMatrix( camera, width, height, near, far ) );
matrixCamera.Transform = camera.Transform;
return matrixCamera;
}
/// <summary>
/// Create a Projection matrix from an existing ProjectionCamera and view size
/// (code acquired with Reflector)
/// </summary>
/// <param name="camera">Camera</param>
/// <param name="width">Width</param>
/// <param name="height">Height</param>
public static Matrix3D CreateProjectionMatrix( ProjectionCamera camera, double width, double height, double near, double far )
{
double aspectRatio = width / height;
double zn = near;
double zf = far;
double fov = ( camera is PerspectiveCamera ) ? ( camera as PerspectiveCamera ).FieldOfView : 60;
double num2 = Math.Tan( DegreesToRadians( fov ) / 2 );
double num5 = aspectRatio / num2;
double num4 = 1 / num2;
double num = ( zf != double.PositiveInfinity ) ? ( zf / ( zn - zf ) ) : -1;
return new Matrix3D( num4, 0, 0, 0, 0, num5, 0, 0, 0, 0, num, -1, 0, 0, zn * num, 0 );
}
/// <summary>
/// Animates the camera position and directions.
/// </summary>
/// <param name="camera">
/// The camera to animate.
/// </param>
/// <param name="newPosition">
/// The position to animate to.
/// </param>
/// <param name="newDirection">
/// The direction to animate to.
/// </param>
/// <param name="newUpDirection">
/// The up direction to animate to.
/// </param>
/// <param name="animationTime">
/// Animation time in milliseconds.
/// </param>
public static void AnimateTo(
ProjectionCamera camera,
Point3D newPosition,
Vector3D newDirection,
Vector3D newUpDirection,
double animationTime)
{
var fromPosition = camera.Position;
var fromDirection = camera.LookDirection;
var fromUpDirection = camera.UpDirection;
camera.Position = newPosition;
camera.LookDirection = newDirection;
camera.UpDirection = newUpDirection;
if (animationTime > 0)
{
var a1 = new Point3DAnimation(
fromPosition, newPosition, new Duration(TimeSpan.FromMilliseconds(animationTime)))
{
AccelerationRatio = 0.3,
DecelerationRatio = 0.5,
FillBehavior = FillBehavior.Stop
};
a1.Completed += (s, a) => { camera.BeginAnimation(ProjectionCamera.PositionProperty, null); };
camera.BeginAnimation(ProjectionCamera.PositionProperty, a1);
var a2 = new Vector3DAnimation(
fromDirection, newDirection, new Duration(TimeSpan.FromMilliseconds(animationTime)))
{
AccelerationRatio = 0.3,
DecelerationRatio = 0.5,
FillBehavior = FillBehavior.Stop
};
a2.Completed += (s, a) => { camera.BeginAnimation(ProjectionCamera.LookDirectionProperty, null); };
camera.BeginAnimation(ProjectionCamera.LookDirectionProperty, a2);
var a3 = new Vector3DAnimation(
fromUpDirection, newUpDirection, new Duration(TimeSpan.FromMilliseconds(animationTime)))
{
AccelerationRatio = 0.3,
DecelerationRatio = 0.5,
FillBehavior = FillBehavior.Stop
};
a3.Completed += (s, a) => { camera.BeginAnimation(ProjectionCamera.UpDirectionProperty, null); };
camera.BeginAnimation(ProjectionCamera.UpDirectionProperty, a3);
}
}
/// <summary>
/// Create a View matrix from an existing ProjectionCamera
/// (code acquired with Reflector)
/// </summary>
/// <param name="camera">Camera</param>
/// <returns>View matrix</returns>
public static Matrix3D CreateViewMatrix( ProjectionCamera camera )
{
Vector3D vectord2 = -camera.LookDirection;
vectord2.Normalize();
Vector3D vectord3 = Vector3D.CrossProduct( camera.UpDirection, vectord2 );
vectord3.Normalize();
Vector3D vectord4 = Vector3D.CrossProduct( vectord2, vectord3 );
Vector3D vectord = (Vector3D)camera.Position;
double offsetX = -Vector3D.DotProduct( vectord3, vectord );
double offsetY = -Vector3D.DotProduct( vectord4, vectord );
double offsetZ = -Vector3D.DotProduct( vectord2, vectord );
Matrix3D viewMatrix = new Matrix3D( vectord3.X, vectord4.X, vectord2.X, 0, vectord3.Y, vectord4.Y, vectord2.Y, 0, vectord3.Z, vectord4.Z, vectord2.Z, 0, offsetX, offsetY, offsetZ, 1 );
PrependInverseTransform( camera.Transform, ref viewMatrix );
return viewMatrix;
}
public DepthPlanes( ProjectionCamera camera, BoundingBox bounds, double step )
{
// Find closest visible point to camera
Point3D position = camera.Transform.Transform( camera.Position );
Vector3D direction = camera.Transform.Transform( camera.LookDirection );
Point3D lookAt = position + ( direction * camera.NearPlaneDistance );
double xDir = Normalize( direction.X );
double yDir = Normalize( direction.Y );
double zDir = Normalize( direction.Z );
double biggest = Math.Max( Math.Max( Math.Abs( lookAt.X ), Math.Abs( lookAt.Y ) ), Math.Abs( lookAt.Z ) );
if ( xDir != 0 ) planes.Add( new Plane( new Vector3D( -xDir, 0, 0 ), -Distance( lookAt.X, biggest, bounds.Max.X, step ) ) );
if ( yDir != 0 ) planes.Add( new Plane( new Vector3D( 0, -yDir, 0 ), -Distance( lookAt.Y, biggest, bounds.Max.Y, step ) ) );
if ( zDir != 0 ) planes.Add( new Plane( new Vector3D( 0, 0, -zDir ), -Distance( lookAt.Z, biggest, bounds.Max.Z, step ) ) );
}
/// <summary>
/// The update camera.
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
public void UpdateCamera(ProjectionCamera camera)
{
camera.Position = this.Position;
camera.LookDirection = this.LookDirection;
camera.UpDirection = this.UpDirection;
camera.NearPlaneDistance = this.NearPlaneDistance;
camera.FarPlaneDistance = this.FarPlaneDistance;
var pcamera = camera as PerspectiveCamera;
if (pcamera != null)
{
pcamera.FieldOfView = this.FieldOfView;
}
var ocamera = camera as OrthographicCamera;
if (ocamera != null)
{
ocamera.Width = this.Width;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="CameraSetting"/> class.
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
public CameraSetting(ProjectionCamera camera)
{
this.Position = camera.Position;
this.LookDirection = camera.LookDirection;
this.UpDirection = camera.UpDirection;
this.NearPlaneDistance = camera.NearPlaneDistance;
this.FarPlaneDistance = camera.FarPlaneDistance;
var pcamera = camera as PerspectiveCamera;
if (pcamera != null)
{
this.FieldOfView = pcamera.FieldOfView;
}
var ocamera = camera as OrthographicCamera;
if (ocamera != null)
{
this.Width = ocamera.Width;
}
}
/// <summary>
/// Zooms to fit the specified bounding rectangle.
/// </summary>
/// <param name="actualCamera">
/// The actual camera.
/// </param>
/// <param name="viewport">
/// The viewport.
/// </param>
/// <param name="bounds">
/// The bounding rectangle.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void ZoomExtents(
ProjectionCamera actualCamera, Viewport3D viewport, Rect3D bounds, double animationTime = 0)
{
var diagonal = new Vector3D(bounds.SizeX, bounds.SizeY, bounds.SizeZ);
var center = bounds.Location + diagonal * 0.5;
double radius = diagonal.Length * 0.5;
ZoomExtents(actualCamera, viewport, center, radius, animationTime);
}
/// <summary>
/// Zooms to fit the extents of the specified viewport.
/// </summary>
/// <param name="actualCamera">
/// The actual camera.
/// </param>
/// <param name="viewport">
/// The viewport.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void ZoomExtents(ProjectionCamera actualCamera, Viewport3D viewport, double animationTime = 0)
{
var bounds = Visual3DHelper.FindBounds(viewport.Children);
var diagonal = new Vector3D(bounds.SizeX, bounds.SizeY, bounds.SizeZ);
if (bounds.IsEmpty || diagonal.LengthSquared == 0)
{
return;
}
ZoomExtents(actualCamera, viewport, bounds, animationTime);
}
/// <summary>
/// Set the camera target point and camera distance.
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
/// <param name="target">
/// The target point.
/// </param>
/// <param name="distance">
/// The distance to the camera.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void LookAt(ProjectionCamera camera, Point3D target, double distance, double animationTime)
{
Vector3D d = camera.LookDirection;
d.Normalize();
LookAt(camera, target, d * distance, animationTime);
}
public CameraAgent(ThreadViewport3D evtHost)
{
host = evtHost;
cmr = (ProjectionCamera)host.Camera;
}
/// <summary>
/// Default constructor
/// </summary>
public Visualizer()
{
InitializeComponent();
HorizontalRotation = 1.86;
VerticalRotation = 0.56;
IsVisibleChanged += OnIsVisibleChanged;
viewport.Camera = camera = new PerspectiveCamera(new Point3D(), new Vector3D(1, 0, 0), new Vector3D(0, 0, 1), FieldOfView);
lightsContainer.Content = lightFromEyes;
Transform3DGroup transform3DGroup = new Transform3DGroup();
transform3DGroup.Children.Add(new RotateTransform3D(new AxisAngleRotation3D(new Vector3D(0, 1, 0), 20)));
transform3DGroup.Children.Add(new RotateTransform3D(new AxisAngleRotation3D(new Vector3D(1, 0, 0), -20)));
lightsContainer.Transform = transform3DGroup;
// Add ambient light
viewport.Children.Add(new ModelVisual3D() { Content = lightAmbient });
#region Axis (for debug only)
/*Cylinder xaxis = new Cylinder(new Point3D(), new Point3D(100, 0,0), 1);
Cylinder yaxis = new Cylinder(new Point3D(), new Point3D(0, 100, 0), 1);
Cylinder zaxis = new Cylinder(new Point3D(), new Point3D(0, 0, 100), 1);
xaxis.Material = new DiffuseMaterial(new SolidColorBrush(Colors.Red));
yaxis.Material = new DiffuseMaterial(new SolidColorBrush(Colors.Green));
zaxis.Material = new DiffuseMaterial(new SolidColorBrush(Colors.Blue));
lightsContainer.Children.Add(xaxis);
lightsContainer.Children.Add(yaxis);
lightsContainer.Children.Add(zaxis);*/
#endregion
viewport.Children.Add(moleculesContainer);
viewport.Children.Add(lightsContainer);
viewport.Children.Add(shadowContainer);
}
/// <summary>
/// Creates preview of this control (automatically setup the camera)
/// </summary>
public void CreatePreview(RenderTargetBitmap renderTargetBitmap)
{
bool wasDetached = !dataAttached;
AttachData();
if (moleculesContainer.Children.Count == 0)
{
if (wasDetached) DetachData();
return;
}
ProjectionCamera backupCamera = camera;
Double backupWidth = Width;
Double backupHeight = Height;
// Change size of the visualizer
Width = renderTargetBitmap.PixelWidth;
Height = renderTargetBitmap.PixelHeight;
Measure(new Size(renderTargetBitmap.PixelWidth, renderTargetBitmap.PixelHeight));
Arrange(new Rect(0, 0, renderTargetBitmap.PixelWidth, renderTargetBitmap.PixelHeight));
// Change camera
// Prepare bounding box
Rect3D boundingBox = VisualTreeHelper.GetDescendantBounds(moleculesContainer);
if (boundingBox.IsEmpty)
{
renderTargetBitmap.Render(this);
boundingBox = VisualTreeHelper.GetDescendantBounds(moleculesContainer);
if (boundingBox.IsEmpty) return;
}
OrthographicCamera orthographicCamera = new OrthographicCamera();
#region Accomodate camera to fit content
if (boundingBox.SizeZ < boundingBox.SizeX && boundingBox.SizeZ < boundingBox.SizeY)
{
orthographicCamera.Position = new Point3D(boundingBox.Location.X + boundingBox.SizeX / 2.0,
boundingBox.Location.Y + boundingBox.SizeY / 2.0,
boundingBox.Location.Z);
orthographicCamera.LookDirection = new Vector3D(0, 0, 1);
orthographicCamera.UpDirection = new Vector3D(0, 1, 0);
orthographicCamera.Width = Math.Max(boundingBox.SizeX, boundingBox.SizeY) * (Width / Height);
}
else if (boundingBox.SizeX < boundingBox.SizeZ && boundingBox.SizeX < boundingBox.SizeY)
{
orthographicCamera.Position = new Point3D(boundingBox.Location.X,
boundingBox.Location.Y + boundingBox.SizeY / 2.0,
boundingBox.Location.Z + boundingBox.SizeZ / 2.0);
orthographicCamera.LookDirection = new Vector3D(1, 0, 0);
orthographicCamera.UpDirection = new Vector3D(0, 1, 0);
orthographicCamera.Width = Math.Max(boundingBox.SizeY, boundingBox.SizeZ);
}
else
{
orthographicCamera.Position = new Point3D(boundingBox.Location.X + boundingBox.SizeX / 2.0,
boundingBox.Location.Y,
boundingBox.Location.Z + boundingBox.SizeZ / 2.0);
orthographicCamera.LookDirection = new Vector3D(0, 1, 0);
orthographicCamera.UpDirection = new Vector3D(1, 0, 0);
orthographicCamera.Width = Math.Max(boundingBox.SizeX, boundingBox.SizeZ);
}
#endregion
orthographicCamera.NearPlaneDistance = 0;
// Set the camera & correct lights
viewport.Camera = orthographicCamera;
lightFromEyes.Direction = orthographicCamera.LookDirection;
RenderOptions.SetEdgeMode(this, EdgeMode.Unspecified);
UpdateLayout();
renderTargetBitmap.Render(this);
// Restore original values of the properties
viewport.Camera = camera = backupCamera;
Width = backupWidth;
Height = backupHeight;
if (wasDetached) DetachData();
}
/// <summary>
/// Changes the direction of a camera.
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
/// <param name="newLookDir">
/// The new look dir.
/// </param>
/// <param name="newUpDirection">
/// The new up direction.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void ChangeDirection(
ProjectionCamera camera, Vector3D newLookDir, Vector3D newUpDirection, double animationTime)
{
var target = camera.Position + camera.LookDirection;
double length = camera.LookDirection.Length;
newLookDir.Normalize();
LookAt(camera, target, newLookDir * length, newUpDirection, animationTime);
}
/// <summary>
/// Zooms to fit the specified sphere.
/// </summary>
/// <param name="camera">
/// The camera to change.
/// </param>
/// <param name="viewport">
/// The viewport.
/// </param>
/// <param name="center">
/// The center of the sphere.
/// </param>
/// <param name="radius">
/// The radius of the sphere.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void ZoomExtents(
ProjectionCamera camera,
Viewport3D viewport,
Point3D center,
double radius,
double animationTime = 0)
{
var perspectiveCamera = camera as PerspectiveCamera;
if (perspectiveCamera != null)
{
FitView(camera, viewport, center, radius, perspectiveCamera.LookDirection, perspectiveCamera.UpDirection, animationTime);
return;
}
var orthoCamera = camera as OrthographicCamera;
if (orthoCamera != null)
{
FitView(camera, viewport, center, radius, orthoCamera.LookDirection, orthoCamera.UpDirection, animationTime);
}
}
/// <summary>
/// Fits the specified bounding sphere to the view.
/// </summary>
/// <param name="camera">The camera to change.</param>
/// <param name="viewport">The viewport.</param>
/// <param name="center">The center of the sphere.</param>
/// <param name="radius">The radius of the sphere.</param>
/// <param name="lookDirection">The look direction.</param>
/// <param name="upDirection">The up direction.</param>
/// <param name="animationTime">The animation time.</param>
public static void FitView(
ProjectionCamera camera,
Viewport3D viewport,
Point3D center,
double radius,
Vector3D lookDirection,
Vector3D upDirection,
double animationTime = 0)
{
var perspectiveCamera = camera as PerspectiveCamera;
if (perspectiveCamera != null)
{
var pcam = perspectiveCamera;
double disth = radius / Math.Tan(0.5 * pcam.FieldOfView * Math.PI / 180);
double vfov = pcam.FieldOfView;
if (viewport.ActualWidth > 0 && viewport.ActualHeight > 0)
{
vfov *= viewport.ActualHeight / viewport.ActualWidth;
}
double distv = radius / Math.Tan(0.5 * vfov * Math.PI / 180);
double dist = Math.Max(disth, distv);
var dir = lookDirection;
dir.Normalize();
LookAt(perspectiveCamera, center, dir * dist, upDirection, animationTime);
return;
}
var orthographicCamera = camera as OrthographicCamera;
if (orthographicCamera != null)
{
LookAt(orthographicCamera, center, lookDirection, upDirection, animationTime);
double newWidth = radius * 2;
if (viewport.ActualWidth > viewport.ActualHeight)
{
newWidth = radius * 2 * viewport.ActualWidth / viewport.ActualHeight;
}
AnimateWidth(orthographicCamera, newWidth, animationTime);
}
}
/// <summary>
/// Zooms to fit the specified sphere.
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
/// <param name="viewport">
/// The viewport.
/// </param>
/// <param name="center">
/// The center of the sphere.
/// </param>
/// <param name="radius">
/// The radius of the sphere.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void ZoomExtents(
ProjectionCamera camera, Viewport3D viewport, Point3D center, double radius, double animationTime = 0)
{
// var target = Camera.Position + Camera.LookDirection;
if (camera is PerspectiveCamera)
{
var pcam = camera as PerspectiveCamera;
double disth = radius / Math.Tan(0.5 * pcam.FieldOfView * Math.PI / 180);
double vfov = pcam.FieldOfView / viewport.ActualWidth * viewport.ActualHeight;
double distv = radius / Math.Tan(0.5 * vfov * Math.PI / 180);
double dist = Math.Max(disth, distv);
var dir = camera.LookDirection;
dir.Normalize();
LookAt(camera, center, dir * dist, animationTime);
}
if (camera is OrthographicCamera)
{
LookAt(camera, center, camera.LookDirection, animationTime);
double newWidth = radius * 2;
if (viewport.ActualWidth > viewport.ActualHeight)
{
newWidth = radius * 2 * viewport.ActualWidth / viewport.ActualHeight;
}
AnimateWidth(camera as OrthographicCamera, newWidth, animationTime);
}
}
/// <summary>
/// Set the camera target point without changing the look direction.
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
/// <param name="target">
/// The target.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void LookAt(ProjectionCamera camera, Point3D target, double animationTime)
{
LookAt(camera, target, camera.LookDirection, animationTime);
}
/// <summary>
/// Zooms the camera to the specified rectangle.
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
/// <param name="viewport">
/// The viewport.
/// </param>
/// <param name="zoomRectangle">
/// The zoom rectangle.
/// </param>
public static void ZoomToRectangle(ProjectionCamera camera, Viewport3D viewport, Rect zoomRectangle)
{
var topLeftRay = Viewport3DHelper.Point2DtoRay3D(viewport, zoomRectangle.TopLeft);
var topRightRay = Viewport3DHelper.Point2DtoRay3D(viewport, zoomRectangle.TopRight);
var centerRay = Viewport3DHelper.Point2DtoRay3D(
viewport,
new Point(
(zoomRectangle.Left + zoomRectangle.Right) * 0.5, (zoomRectangle.Top + zoomRectangle.Bottom) * 0.5));
if (topLeftRay == null || topRightRay == null || centerRay == null)
{
// could not invert camera matrix
return;
}
var u = topLeftRay.Direction;
var v = topRightRay.Direction;
var w = centerRay.Direction;
u.Normalize();
v.Normalize();
w.Normalize();
var perspectiveCamera = camera as PerspectiveCamera;
if (perspectiveCamera != null)
{
var distance = camera.LookDirection.Length;
// option 1: change distance
var newDistance = distance * zoomRectangle.Width / viewport.ActualWidth;
var newLookDirection = newDistance * w;
var newPosition = perspectiveCamera.Position + (distance - newDistance) * w;
var newTarget = newPosition + newLookDirection;
LookAt(camera, newTarget, newLookDirection, 200);
// option 2: change fov
// double newFieldOfView = Math.Acos(Vector3D.DotProduct(u, v));
// var newTarget = camera.Position + distance * w;
// pcamera.FieldOfView = newFieldOfView * 180 / Math.PI;
// LookAt(camera, newTarget, distance * w, 0);
}
var orthographicCamera = camera as OrthographicCamera;
if (orthographicCamera != null)
{
orthographicCamera.Width *= zoomRectangle.Width / viewport.ActualWidth;
var oldTarget = camera.Position + camera.LookDirection;
var distance = camera.LookDirection.Length;
var newTarget = centerRay.PlaneIntersection(oldTarget, w);
if (newTarget != null)
{
orthographicCamera.LookDirection = w * distance;
orthographicCamera.Position = newTarget.Value - orthographicCamera.LookDirection;
}
}
}
/// <summary>
/// Set the camera target point and look direction
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
/// <param name="target">
/// The target.
/// </param>
/// <param name="newLookDirection">
/// The new look direction.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void LookAt(
ProjectionCamera camera, Point3D target, Vector3D newLookDirection, double animationTime)
{
LookAt(camera, target, newLookDirection, camera.UpDirection, animationTime);
}
/// <summary>
/// Sets the camera.
/// </summary>
/// <param name="camera">The camera.</param>
/// <param name="changeUpDirectionFromZtoY">switch Y and Z if set to <c>true</c>.</param>
public void SetCamera(ProjectionCamera camera, bool changeUpDirectionFromZtoY = true)
{
this.CamUp = new Vector3D(0, 1, 0);
this.CamTarget = camera.Position + camera.LookDirection;
this.CamPos = camera.Position;
if (changeUpDirectionFromZtoY)
{
this.CamTarget = this.SwitchYZ(this.CamTarget);
this.CamPos = this.SwitchYZ(this.CamPos);
}
var pc = camera as PerspectiveCamera;
if (pc != null)
{
this.FieldOfView = pc.FieldOfView;
}
this.CamMotionUp = this.CamUp;
this.CamMotionTarget = this.CamTarget;
this.CamMotionPos = this.CamPos;
}
/// <summary>
/// Set the camera target point and directions
/// </summary>
/// <param name="camera">
/// The camera.
/// </param>
/// <param name="target">
/// The target.
/// </param>
/// <param name="newLookDirection">
/// The new look direction.
/// </param>
/// <param name="newUpDirection">
/// The new up direction.
/// </param>
/// <param name="animationTime">
/// The animation time.
/// </param>
public static void LookAt(
ProjectionCamera camera,
Point3D target,
Vector3D newLookDirection,
Vector3D newUpDirection,
double animationTime)
{
Point3D newPosition = target - newLookDirection;
if (camera is PerspectiveCamera)
{
AnimateTo(camera as PerspectiveCamera, newPosition, newLookDirection, newUpDirection, animationTime);
}
if (camera is OrthographicCamera)
{
AnimateTo(camera as OrthographicCamera, newPosition, newLookDirection, newUpDirection, animationTime);
}
}
/// <summary>
/// Copies the specified camera, converts field of view/width if neccessary.
/// </summary>
/// <param name="source">
/// The source camera.
/// </param>
/// <param name="dest">
/// The destination camera.
/// </param>
public static void Copy(ProjectionCamera source, ProjectionCamera dest)
{
if (source == null || dest == null)
{
return;
}
dest.LookDirection = source.LookDirection;
dest.Position = source.Position;
dest.UpDirection = source.UpDirection;
dest.NearPlaneDistance = source.NearPlaneDistance;
dest.FarPlaneDistance = source.FarPlaneDistance;
var psrc = source as PerspectiveCamera;
var osrc = source as OrthographicCamera;
var pdest = dest as PerspectiveCamera;
var odest = dest as OrthographicCamera;
if (pdest != null)
{
double fov = 45;
if (psrc != null)
{
fov = psrc.FieldOfView;
}
if (osrc != null)
{
double dist = source.LookDirection.Length;
fov = Math.Atan(osrc.Width / 2 / dist) * 180 / Math.PI * 2;
}
pdest.FieldOfView = fov;
}
if (odest != null)
{
double width = 100;
if (psrc != null)
{
double dist = source.LookDirection.Length;
width = Math.Tan(psrc.FieldOfView / 180 * Math.PI / 2) * dist * 2;
}
if (osrc != null)
{
width = osrc.Width;
}
odest.Width = width;
}
}
/// <summary>
/// Renders visualizer to bitmap
/// </summary>
public void RenderTo(RenderTargetBitmap renderTargetBitmap)
{
bool wasDetached = !dataAttached;
AttachData();
if (moleculesContainer.Children.Count == 0)
{
if (wasDetached) DetachData();
return;
}
ProjectionCamera backupCamera = camera;
Double backupWidth = Width;
Double backupHeight = Height;
// Change size of the visualizer
Width = renderTargetBitmap.PixelWidth;
Height = renderTargetBitmap.PixelHeight;
Measure(new Size(renderTargetBitmap.PixelWidth, renderTargetBitmap.PixelHeight));
Arrange(new Rect(0, 0, renderTargetBitmap.PixelWidth, renderTargetBitmap.PixelHeight));
// Finish the animations
CompleteAnimation();
RenderOptions.SetEdgeMode(this, EdgeMode.Unspecified);
UpdateLayout();
renderTargetBitmap.Render(this);
// Restore original values of the properties
viewport.Camera = camera = backupCamera;
Width = backupWidth;
Height = backupHeight;
if (wasDetached) DetachData();
}
/// <summary>
/// Copy the direction of the source <see cref="Camera"/>. Used for the CoordinateSystem view.
/// </summary>
/// <param name="source">
/// The source camera.
/// </param>
/// <param name="dest">
/// The destination camera.
/// </param>
/// <param name="distance">
/// New length of the LookDirection vector.
/// </param>
public static void CopyDirectionOnly(ProjectionCamera source, ProjectionCamera dest, double distance)
{
if (source == null || dest == null)
{
return;
}
Vector3D dir = source.LookDirection;
dir.Normalize();
dir *= distance;
dest.LookDirection = dir;
dest.Position = new Point3D(-dest.LookDirection.X, -dest.LookDirection.Y, -dest.LookDirection.Z);
dest.UpDirection = source.UpDirection;
}
public static void SetDirection(ProjectionCamera target, ProjectionCamera source)
{
target.LookDirection = source.LookDirection;
target.UpDirection = source.UpDirection;
}