/// <summary>
/// Initializes a new instance of the <see cref="RotKeyFrame"/> struct.
/// </summary>
/// <param name="data">The data.</param>
/// <param name="offset">The offset.</param>
public RotKeyFrame(byte[] data, int offset)
{
Frame = BitConverter.ToInt32(data, offset);
Quaternion = new TkQuaternion(
BitConverter.ToSingle(data, offset + 4),
BitConverter.ToSingle(data, offset + 8),
BitConverter.ToSingle(data, offset + 12),
BitConverter.ToSingle(data, offset + 16)
);
}
/// <summary>
/// Gets the rotation quaternion.
/// </summary>
/// <param name="animationFrame">The animation frame.</param>
/// <returns>TkQuaternion.</returns>
public TkQuaternion GetRotationQuaternion(int animationFrame)
{
if (_bufferedRot == null)
{
for (int i = 0; i < _rotFrames.Count - 1; i++)
{
if (animationFrame >= _rotFrames[i].Frame && _rotFrames[i + 1].Frame < animationFrame)
{
continue;
}
if (_rotFrames[i].Frame == animationFrame)
{
_bufferedRot = _rotFrames[i].Quaternion;
return(_bufferedRot.Value);
}
if (_rotFrames[i + 1].Frame == animationFrame)
{
_bufferedRot = _rotFrames[i + 1].Quaternion;
return(_bufferedRot.Value);
}
int dist = _rotFrames[i + 1].Frame - _rotFrames[i].Frame;
animationFrame = animationFrame - _rotFrames[i].Frame;
float mult = (animationFrame / (float)dist);
var curFrame = _rotFrames[i];
var nexFrame = _rotFrames[i + 1];
_bufferedRot = TkQuaternion.Slerp(curFrame.Quaternion, nexFrame.Quaternion, mult);
return(_bufferedRot.Value);
}
if (animationFrame >= _rotFrames[_rotFrames.Count - 1].Frame)
{
return(_rotFrames[_rotFrames.Count - 1].Quaternion);
}
return(_rotFrames[0].Quaternion);
}
return(_bufferedRot.Value);
}
/// <summary>
/// Initializes a new instance of the <see cref="RotKeyFrame"/> struct.
/// </summary>
/// <param name="reader">The reader.</param>
public RotKeyFrame(IBinaryReader reader)
{
Frame = reader.Int32();
Quaternion = new TkQuaternion(reader.Float(), reader.Float(), reader.Float(), reader.Float());
}
/// <summary>
/// Initializes a new instance of the <see cref="RotKeyFrame"/> struct.
/// </summary>
/// <param name="rkf">The RKF.</param>
public RotKeyFrame(RotKeyFrame rkf)
{
Frame = rkf.Frame;
Quaternion = rkf.Quaternion;
}