/// <summary>
/// 連結ベジエから特定の割合の場所を得るメソッド
/// </summary>
/// <param name="num">最大、最小はMaxRatio,MinRatioから</param>
/// <param name="direction">位置</param>
/// <param name="pos">向き</param>
/// <returns></returns>
public void GetPoint(float num, out PointF pos, out PointF direction)
{
pos = PointF.Empty;
direction = new PointF(1, 0);
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 targetlength = length * rest / MaxRatio;
BezierCaliculate.GetBezeirSplitPoint(previous, next, targetlength, out pos, out direction);
return;
}
}
