本文整理汇总了C#中System.Windows.Media.Media3D.Quaternion.Scale方法的典型用法代码示例。如果您正苦于以下问题：C# Quaternion.Scale方法的具体用法？C# Quaternion.Scale怎么用？C# Quaternion.Scale使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类System.Windows.Media.Media3D.Quaternion的用法示例。
在下文中一共展示了Quaternion.Scale方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Slerp
/// <summary>
/// Smoothly interpolate between the two given quaternions using Spherical
/// Linear Interpolation (SLERP).
/// </summary>
/// <param name="from">First quaternion for interpolation.</param>
/// <param name="to">Second quaternion for interpolation.</param>
/// <param name="t">Interpolation coefficient.</param>
/// <param name="useShortestPath">If true, Slerp will automatically flip the sign of
/// the destination Quaternion to ensure the shortest path is taken.</param>
/// <returns>SLERP-interpolated quaternion between the two given quaternions.</returns>
public static Quaternion Slerp(Quaternion from, Quaternion to, double t, bool useShortestPath)
{
if (from.IsDistinguishedIdentity)
{
from._w = 1;
}
if (to.IsDistinguishedIdentity)
{
to._w = 1;
}
double cosOmega;
double scaleFrom, scaleTo;
// Normalize inputs and stash their lengths
double lengthFrom = from.Length();
double lengthTo = to.Length();
from.Scale(1/lengthFrom);
to.Scale(1/lengthTo);
// Calculate cos of omega.
cosOmega = from._x*to._x + from._y*to._y + from._z*to._z + from._w*to._w;
if (useShortestPath)
{
// If we are taking the shortest path we flip the signs to ensure that
// cosOmega will be positive.
if (cosOmega < 0.0)
{
cosOmega = -cosOmega;
to._x = -to._x;
to._y = -to._y;
to._z = -to._z;
to._w = -to._w;
}
}
else
{
// If we are not taking the UseShortestPath we clamp cosOmega to
// -1 to stay in the domain of Math.Acos below.
if (cosOmega < -1.0)
{
cosOmega = -1.0;
}
}
// Clamp cosOmega to [-1,1] to stay in the domain of Math.Acos below.
// The logic above has either flipped the sign of cosOmega to ensure it
// is positive or clamped to -1 aready. We only need to worry about the
// upper limit here.
if (cosOmega > 1.0)
{
cosOmega = 1.0;
}
Debug.Assert(!(cosOmega < -1.0) && !(cosOmega > 1.0),
"cosOmega should be clamped to [-1,1]");
// The mainline algorithm doesn't work for extreme
// cosine values. For large cosine we have a better
// fallback hence the asymmetric limits.
const double maxCosine = 1.0 - 1e-6;
const double minCosine = 1e-10 - 1.0;
// Calculate scaling coefficients.
if (cosOmega > maxCosine)
{
// Quaternions are too close - use linear interpolation.
scaleFrom = 1.0 - t;
scaleTo = t;
}
else if (cosOmega < minCosine)
{
// Quaternions are nearly opposite, so we will pretend to
// is exactly -from.
// First assign arbitrary perpendicular to "to".
to = new Quaternion(-from.Y, from.X, -from.W, from.Z);
double theta = t * Math.PI;
scaleFrom = Math.Cos(theta);
scaleTo = Math.Sin(theta);
}
else
{
// Standard case - use SLERP interpolation.
double omega = Math.Acos(cosOmega);
double sinOmega = Math.Sqrt(1.0 - cosOmega*cosOmega);
scaleFrom = Math.Sin((1.0 - t) * omega) / sinOmega;
scaleTo = Math.Sin(t * omega) / sinOmega;
//.........这里部分代码省略.........