/// <summary>
/// Calculate bounds of twovector intervals
/// </summary>
/// <param name="start">interp curve point at Start</param>
/// <param name="end">interp curve point at End</param>
/// <param name="currentMin">Input and Output could be updated if needs new interval minimum bound</param>
/// <param name="currentMax">Input and Output could be updated if needs new interval maximmum bound</param>
public static void CurveFindIntervalBounds(
FInterpCurvePointTwoVectors start, FInterpCurvePointTwoVectors end,
ref FTwoVectors currentMin, ref FTwoVectors currentMax)
{
bool isCurve = start.IsCurveKey();
float min, max;
// Do the first curve
FindBounds(out min, out max, start.OutVal.V1.X, start.LeaveTangent.V1.X, start.InVal, end.OutVal.V1.X, end.ArriveTangent.V1.X, end.InVal, isCurve);
currentMin.V1.X = FMath.Min(currentMin.V1.X, min);
currentMax.V1.X = FMath.Max(currentMax.V1.X, max);
FindBounds(out min, out max, start.OutVal.V1.Y, start.LeaveTangent.V1.Y, start.InVal, end.OutVal.V1.Y, end.ArriveTangent.V1.Y, end.InVal, isCurve);
currentMin.V1.Y = FMath.Min(currentMin.V1.Y, min);
currentMax.V1.Y = FMath.Max(currentMax.V1.Y, max);
FindBounds(out min, out max, start.OutVal.V1.Z, start.LeaveTangent.V1.Z, start.InVal, end.OutVal.V1.Z, end.ArriveTangent.V1.Z, end.InVal, isCurve);
currentMin.V1.Z = FMath.Min(currentMin.V1.Z, min);
currentMax.V1.Z = FMath.Max(currentMax.V1.Z, max);
// Do the second curve
FindBounds(out min, out max, start.OutVal.V2.X, start.LeaveTangent.V2.X, start.InVal, end.OutVal.V2.X, end.ArriveTangent.V2.X, end.InVal, isCurve);
currentMin.V2.X = FMath.Min(currentMin.V2.X, min);
currentMax.V2.X = FMath.Max(currentMax.V2.X, max);
FindBounds(out min, out max, start.OutVal.V2.Y, start.LeaveTangent.V2.Y, start.InVal, end.OutVal.V2.Y, end.ArriveTangent.V2.Y, end.InVal, isCurve);
currentMin.V2.Y = FMath.Min(currentMin.V2.Y, min);
currentMax.V2.Y = FMath.Max(currentMax.V2.Y, max);
FindBounds(out min, out max, start.OutVal.V2.Z, start.LeaveTangent.V2.Z, start.InVal, end.OutVal.V2.Z, end.ArriveTangent.V2.Z, end.InVal, isCurve);
currentMin.V2.Z = FMath.Min(currentMin.V2.Z, min);
currentMax.V2.Z = FMath.Max(currentMax.V2.Z, max);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="inVal">input value that corresponds to this key</param>
/// <param name="outVal">Output value of templated type</param>
public FInterpCurvePointTwoVectors(float inVal, FTwoVectors outVal)
{
InVal = inVal;
OutVal = outVal;
ArriveTangent = default(FTwoVectors);
LeaveTangent = default(FTwoVectors);
InterpMode = EInterpCurveMode.Linear;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="inVal">input value that corresponds to this key</param>
/// <param name="outVal">Output value of templated type</param>
/// <param name="arriveTangent">Tangent of curve arriving at this point. </param>
/// <param name="leaveTangent">Tangent of curve leaving from this point.</param>
/// <param name="interpMode">interpolation mode to use</param>
public FInterpCurvePointTwoVectors(float inVal, FTwoVectors outVal,
FTwoVectors arriveTangent, FTwoVectors leaveTangent, EInterpCurveMode interpMode)
{
InVal = inVal;
OutVal = outVal;
ArriveTangent = arriveTangent;
LeaveTangent = leaveTangent;
InterpMode = interpMode;
}
/// <summary>
/// Computes a tangent for the specified control point. Special case for FTwoVectors types; supports clamping.
/// </summary>
public static unsafe void ComputeCurveTangent(
float prevTime, FTwoVectors prevPoint,
float curTime, FTwoVectors curPoint,
float nextTime, FTwoVectors nextPoint,
float tension, bool wantClamping, out FTwoVectors outTangent)
{
if (wantClamping)
{
FTwoVectors result;
ComputeClampableFloatVectorCurveTangentClamped(
prevTime, (float *)&prevPoint,
curTime, (float *)&curPoint,
nextTime, (float *)&nextPoint,
tension, sizeof(FTwoVectors), (float *)&result);
outTangent = result;
}
else
{
AutoCalcTangent(prevPoint, curPoint, nextPoint, tension, out outTangent);
float prevToNextTimeDiff = FMath.Max(FMath.KindaSmallNumber, nextTime - prevTime);
outTangent /= prevToNextTimeDiff;
}
}
/// <summary>
/// Computes Tangent for a curve segment
/// </summary>
public static void AutoCalcTangent(FTwoVectors prevP, FTwoVectors p, FTwoVectors nextP, float tension, out FTwoVectors outTan)
{
outTan = (1.0f - tension) * ((p - prevP) + (nextP - p));
}