/// <summary>
/// 指定された割合分割されたベジエを得るメソッド
/// </summary>
/// <param name="num">最大、最小はMaxRatio,MinRatioから</param>
/// <param name="bcps1">分割１</param>
/// <param name="bcps2">分割２</param>
public void GetDevidedBeziers(float num, out BezierControlPoint[] bcps1, out BezierControlPoint[] bcps2)
{
bcps1 = null;
bcps2 = null;
if (bcps == null || bcps.Length == 0)
{
return;
}
if (num < MinRatio)
{
num = MinRatio;
}
else if (num > MaxRatio)
{
num = MaxRatio;
}
//find where
float sumnum = 0;
float rest = 0;
BezierControlPoint previous = null, next = null;
int foundindex = -1;
for (int i = 0; i < bcps.Length; i++)
{
BezierControlPoint bcp = bcps[i];
if (previous != null)
{
float ratio = eachlength[i - 1] / length * MaxRatio;
if (sumnum + ratio >= num || (sumnum + ratio) >= MaxRatio - 0.0009765625)
{
next = bcp;
rest = num - sumnum;
foundindex = i;
break;
}
sumnum += ratio;
}
previous = bcp;
}
if (foundindex != -1)
{
float targetratio = 1 - rest / MaxRatio * length / eachlength[foundindex - 1];
BezierCaliculate.GetDevidedBeziers(previous, next, targetratio, out BezierControlPoint bcp1, out BezierControlPoint bcp2, out BezierControlPoint bcp3);
bcps1 = new BezierControlPoint[foundindex + 1];
bcps2 = new BezierControlPoint[BCPS.Length - foundindex + 1];
for (int i = 0; i < foundindex - 1; i++)
{
bcps1[i] = BCPS[i].Clone();
}
bcps1[foundindex - 1] = bcp1;
bcps1[foundindex] = bcp2.Clone();
bcps2[0] = bcp2;
bcps2[1] = bcp3;
for (int i = foundindex + 1; i < BCPS.Length; i++)
{
bcps2[i - foundindex + 1] = BCPS[i].Clone();
}
return;
}
}
