/// <summary>
/// 求曲线上与给定点最近的点
/// </summary>
public float GetClosestLocation(Vector3 point, int segments)
{
Vector3 last = _f0;
Vector3 current;
float closest01;
float sqrMagnitude;
float bestSqrMagnitude = float.MaxValue;
float bestT = 0f;
for (int i = 1; i <= segments; i++)
{
current = GetPoint((float)i / segments);
closest01 = Kit.ClosestPoint01(last, current, point);
sqrMagnitude = (last + (current - last) * closest01 - point).sqrMagnitude;
if (sqrMagnitude < bestSqrMagnitude)
{
bestSqrMagnitude = sqrMagnitude;
bestT = (i - 1f + closest01) / segments;
}
last = current;
}
return bestT;
}