/// <summary>
/// Build a rotation matrix from a quaternion
/// </summary>
/// <param name="q">the quaternion</param>
/// <returns>A rotation matrix</returns>
public static SCNMatrix4 Rotate(Quaternion q)
{
SCNMatrix4 result;
Vector3 axis;
float angle;
q.ToAxisAngle(out axis, out angle);
CreateFromAxisAngle(axis, angle, out result);
return(result);
}
public virtual Quaternion [] GetQuaternionValues()
{
var count = ElementCount * TimeSampleCount;
var timesArr = new Quaternion [(int)count];
int typeSize = Marshal.SizeOf(typeof(Quaternion));
unsafe {
fixed(Quaternion *arrptr = timesArr)
MDLMemoryHelper.FetchValues(typeSize, (IntPtr)arrptr, count, _GetFloatQuaternionArray);
}
return(timesArr);
}
public virtual Quaternion [] GetQuaternionValues(double time)
{
var count = ElementCount;
var timesArr = new Quaternion [(int)count];
unsafe {
int typeSize = sizeof(Quaternion);
fixed(Quaternion *arrptr = timesArr)
MDLMemoryHelper.FetchValues(typeSize, (IntPtr)arrptr, count, time, _GetFloatQuaternionArray);
}
return(timesArr);
}
public virtual Quaternion [] GetQuaternionValues(nuint maxCount)
{
var timesArr = new Quaternion [(int)maxCount];
unsafe {
int typeSize = sizeof(Quaternion);
fixed(Quaternion *arrptr = timesArr)
{
var rv = MDLMemoryHelper.FetchValues(typeSize, (IntPtr)arrptr, maxCount, _GetFloatQuaternionArray);
Array.Resize(ref timesArr, (int)rv);
}
}
return(timesArr);
}
public SCNQuaternion(Quaternion openTkQuaternion) : this(new SCNVector3(openTkQuaternion.XYZ), openTkQuaternion.W)
{
}
