public CameraRotateAnimation(CameraLookDirection fromValue, IEnumerable <CameraLookDirection> tosValue, Duration duration, FillBehavior fillBehavior)
{
From = fromValue;
Tos = tosValue;
Duration = duration;
FillBehavior = FillBehavior;
}
/// <summary>
/// Creates a new DoubleAnimation that will animate a
/// Double property from the "fromValue" parameter of this constructor
/// to the "toValue" parameter.
/// </summary>
public CameraRotateAnimation(CameraLookDirection fromValue, CameraLookDirection toValue, Duration duration)
: this()
{
From = fromValue;
To = toValue;
Duration = duration;
}
/// <summary>
/// Creates a new DoubleAnimation that will animate a
/// Double property from its base value to the value specified
/// by the "toValue" parameter of this constructor.
/// </summary>
public CameraRotateAnimation(CameraLookDirection toValue, Duration duration, FillBehavior fillBehavior)
: this()
{
To = toValue;
Duration = duration;
FillBehavior = fillBehavior;
}
/// <summary>
/// 初始化动画关键点值
/// </summary>
/// <param name="defaultOriginValue"></param>
/// <param name="defaultDestinationValue"></param>
private void InitAnimationKeyValues(CameraLookDirection defaultOriginValue, CameraLookDirection defaultDestinationValue)
{
if (From.HasValue)
{
if (To.HasValue)
{
_keyValues = new CameraLookDirection[2];
_keyValues[0] = From.Value;
_keyValues[1] = To.Value;
}
else if (Tos != null && Tos.Count() != 0)
{
_keyValues = new CameraLookDirection[Tos.Count() + 1];
_keyValues[0] = From.Value;
int index = 1;
foreach (CameraLookDirection lookDirection in Tos)
{
_keyValues[index] = lookDirection;
index++;
}
}
else
{
_keyValues = new CameraLookDirection[2];
_keyValues[0] = From.Value;
_keyValues[1] = defaultDestinationValue;
}
}
else if (To.HasValue)
{
_keyValues = new CameraLookDirection[2];
_keyValues[0] = defaultOriginValue;
_keyValues[1] = To.Value;
}
else if (Tos != null && Tos.Count() != 0)
{
_keyValues = new CameraLookDirection[Tos.Count() + 1];
_keyValues[0] = defaultOriginValue;
int index = 1;
foreach (CameraLookDirection lookDirection in Tos)
{
_keyValues[index] = lookDirection;
index++;
}
}
else
{
_keyValues = new CameraLookDirection[2];
_keyValues[0] = defaultOriginValue;
_keyValues[1] = defaultDestinationValue;
}
}
public override bool Equals(object obj)
{
if (obj == null || !(obj is CameraLookDirection))
{
return(false);
}
CameraLookDirection lookDirection = (CameraLookDirection)obj;
return(this == lookDirection);
}
public CameraLookDirection GetCurrentValue(CameraLookDirection defaultOriginValue, CameraLookDirection defaultDestinationValue, AnimationClock animationClock)
{
ReadPreamble();
if (animationClock == null)
{
throw new ArgumentNullException("animationClock");
}
if (animationClock.CurrentState == ClockState.Stopped)
{
return(new CameraLookDirection());
}
return(GetCurrentValueCore(defaultOriginValue, defaultDestinationValue, animationClock));
}
private static void OnLookDirectionChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Panorama panorama = d as Panorama;
CameraLookDirection lookDirection = (CameraLookDirection)e.NewValue;
if (lookDirection == new CameraLookDirection())
{
return;
}
if (panorama.Camera != null)
{
panorama.Camera.LookDirection = lookDirection.LookDirection;
panorama.Camera.UpDirection = lookDirection.UpDirection;
}
}
private CameraLookDirection GetCameraLookDirectionAfterRotate(CameraLookDirection originalLookDirection, Vector3D rotateAxis, double rotateAngle)
{
RotateTransform3D rotateTransform3D = new RotateTransform3D();
rotateTransform3D.Rotation = new AxisAngleRotation3D(rotateAxis, rotateAngle);
Matrix3D matrix = rotateTransform3D.Value;
Point3D newCameraLookPoint = matrix.Transform(new Point3D(originalLookDirection.LookDirection.X, originalLookDirection.LookDirection.Y, originalLookDirection.LookDirection.Z));
Vector3D newCameraLookDirection = new Vector3D(newCameraLookPoint.X, newCameraLookPoint.Y, newCameraLookPoint.Z);
Vector3D horizontalVector3D = Vector3D.CrossProduct(new Vector3D(0, -1, 0), newCameraLookDirection);
Vector3D upDirection = Vector3D.CrossProduct(horizontalVector3D, newCameraLookDirection);
CameraLookDirection cameraLookDirection = new CameraLookDirection(newCameraLookDirection, upDirection);
return(cameraLookDirection);
}
private void TryValidateAnimationFunction(CameraLookDirection defaultOriginValue, CameraLookDirection defaultDestinationValue)
{
if (_isAnimationFunctionValid)
{
return;
}
InitAnimationKeyValues(defaultOriginValue, defaultDestinationValue);
if (_keyValues != null && _keyValues.Length > 0)
{
int keyValueCount = _keyValues.Length;
int sectionCount = keyValueCount - 1;
_rotateAxesOfSection = new Vector3D[sectionCount];
for (int i = 0; i < sectionCount; i++)
{
_rotateAxesOfSection[i] = Vector3D.CrossProduct(_keyValues[i].LookDirection, _keyValues[i + 1].LookDirection);
}
_anglesOfSection = new double[sectionCount];
//计算每一个旋转片段的旋转角
for (int i = 0; i < sectionCount; i++)
{
_anglesOfSection[i] = Vector3D.AngleBetween(_keyValues[i].LookDirection, _keyValues[i + 1].LookDirection);
}
//计算总的旋转角度
double totalAngle = _anglesOfSection.Sum();
//计算每一个关键点的指向与初值关键点间的旋转角的总和
double[] rotateAnglesToOriginDirection = new double[keyValueCount];
for (int i = 0; i < sectionCount; i++)
{
rotateAnglesToOriginDirection[i + 1] = rotateAnglesToOriginDirection[i] + _anglesOfSection[i];
}
_progressBegins = new double[keyValueCount];
for (int i = 1; i < keyValueCount; i++)
{
_progressBegins[i] = rotateAnglesToOriginDirection[i] / totalAngle;
}
}
_isAnimationFunctionValid = true;
}
protected override CameraLookDirection GetCurrentValueCore(CameraLookDirection defaultOriginValue, CameraLookDirection defaultDestinationValue, AnimationClock animationClock)
{
TryValidateAnimationFunction(defaultOriginValue, defaultDestinationValue);
double progress = GetCurrentProgress(animationClock);
int sectionIndex = GetRotateSectionIndex(ref progress);
double progressInSection = GetProgressInSection(progress, sectionIndex);
CameraLookDirection rotateFromDirectionInSection = _keyValues[sectionIndex];
Vector3D rotateAxis = _rotateAxesOfSection[sectionIndex];
double fullRotateAngle = _anglesOfSection[sectionIndex];
double rotateAngle = fullRotateAngle * progressInSection;
CameraLookDirection cameraLookDirection = GetCameraLookDirectionAfterRotate(rotateFromDirectionInSection, rotateAxis, rotateAngle);
return(cameraLookDirection);
}
protected abstract CameraLookDirection GetCurrentValueCore(CameraLookDirection defaultOriginValue, CameraLookDirection defaultDestinationValue, AnimationClock animationClock);
public CameraRotateAnimation(CameraLookDirection fromValue, IEnumerable <CameraLookDirection> tosValue, Duration duration)
{
From = fromValue;
Tos = tosValue;
Duration = duration;
}
