public bool ClosestPoint(
int[] objectIndexArray, int firstIndex, int indexCount, V3d queryPoint,
Func <IIntersectableObjectSet, int, bool> ios_index_objectFilter,
Func <IIntersectableObjectSet, int, int, ObjectClosestPoint, bool> ios_index_part_ocp_pointFilter,
ref ObjectClosestPoint closestPoint)
{
bool result = false;
var pa = m_positionArray;
for (int i = firstIndex, e = firstIndex + indexCount; i < e; i++)
{
int li = objectIndexArray[i];
V3d p = queryPoint.GetClosestPointOnLine(pa[li], pa[li + 1]);
double d2 = V3d.DistanceSquared(queryPoint, p);
if (d2 < closestPoint.DistanceSquared)
{
result = closestPoint.Set(d2, p, this, li);
}
}
return(result);
}