public Vector3 GetSplinePoint(float tX, float tY)
{
int iX = (int)(tX * ControlSizeX);
int i0X = Mathf.Max(0, iX - 1);
int i1X = Mathf.Min(iX, ControlSizeX - 1);
int i2X = Mathf.Min(iX + 1, ControlSizeX - 1);
int iY = (int)(tY * ControlSizeY);
int i0Y = Mathf.Max(0, iY - 1);
int i1Y = Mathf.Min(iY, ControlSizeY - 1);
int i2Y = Mathf.Min(iY + 1, ControlSizeY - 1);
var p00 = GetControl(i0X, i0Y);
var p10 = GetControl(i1X, i0Y);
var p20 = GetControl(i2X, i0Y);
var p01 = GetControl(i0X, i1Y);
var p11 = GetControl(i1X, i1Y);
var p21 = GetControl(i2X, i1Y);
var p02 = GetControl(i0X, i2Y);
var p12 = GetControl(i1X, i2Y);
var p22 = GetControl(i2X, i2Y);
var cPoint10 = (p00 + p10) * 0.5f;
var cPoint20 = (p10 + p20) * 0.5f;
var cPoint11 = (p01 + p11) * 0.5f;
var cPoint21 = (p11 + p21) * 0.5f;
var cPoint12 = (p02 + p12) * 0.5f;
var cPoint22 = (p12 + p22) * 0.5f;
float tStepX = 1.0f / ControlSizeX;
float localTx = (tX % tStepX) * ControlSizeX;
var resultX0 = CurveUtils.GetBezierPoint(cPoint10, p10, cPoint20, localTx);
var resultX1 = CurveUtils.GetBezierPoint(cPoint11, p11, cPoint21, localTx);
var resultX2 = CurveUtils.GetBezierPoint(cPoint12, p12, cPoint22, localTx);
var cPoint1Y = (resultX0 + resultX1) * 0.5f;
var cPoint2Y = (resultX2 + resultX1) * 0.5f;
float tStepY = 1.0f / ControlSizeY;
float localTy = (tY % tStepY) * ControlSizeY;
return(CurveUtils.GetBezierPoint(cPoint1Y, resultX1, cPoint2Y, localTy));
}
