public void SetTangentVector(int fencepostIndex, Vector3 positiveTangentVector)
{
if (fencepostIndex < 0 || fencepostIndex > curves.Count)
{
Debug.LogErrorFormat("ERROR: fencepostIndex {0} must be in the inclusive range [0, {1}].",
fencepostIndex, curves.Count
);
}
if (fencepostIndex < 1)
{
BezierCurve3D startCurve = curves[0];
startCurve.p1 = startCurve.p0 + positiveTangentVector;
curves[0] = startCurve;
}
else if (1 <= fencepostIndex && fencepostIndex < curves.Count)
{
BezierCurve3D preCurve = curves[fencepostIndex - 1];
BezierCurve3D postCurve = curves[fencepostIndex];
preCurve.p2 = preCurve.p3 - positiveTangentVector;
postCurve.p1 = postCurve.p0 + positiveTangentVector;
curves[fencepostIndex - 1] = preCurve;
curves[fencepostIndex] = postCurve;
}
else
{
BezierCurve3D endCurve = curves[fencepostIndex];
endCurve.p2 = endCurve.p3 - positiveTangentVector;
curves[fencepostIndex] = endCurve;
}
}
public static BezierCurve3D Lerp(BezierCurve3D a, BezierCurve3D b, float t)
{
return(new BezierCurve3D(
Vector3.Lerp(a.p0, b.p0, t),
Vector3.Lerp(a.p1, b.p1, t),
Vector3.Lerp(a.p2, b.p2, t),
Vector3.Lerp(a.p3, b.p3, t)
));
}
// TODO: implement subdivide/upres
public static void Lerp(BezierChain3D a, BezierChain3D b, float t, ref BezierChain3D dst)
{
if (a.curves.Count != b.curves.Count)
{
Debug.LogErrorFormat("Currently cannot lerp 2 chains of different curveCount. A curveCount: {0}, B curveCount: {1} ",
a.curves.Count, b.curves.Count
);
return;
}
dst.curves.Clear();
int cCount = a.curves.Count;
for (int i = 0; i < cCount; i++)
{
var aCurve = a.curves[i];
var bCurve = a.curves[i];
dst.curves.Add(BezierCurve3D.Lerp(aCurve, bCurve, t));
}
}
