public bool RemoveKnotAtPosition(Vector3 pos) {
CameraPathKnot removeKnot = m_Path.GetKnotAtPosition(pos);
if (removeKnot != null) {
// If we're removing the last position knot, just destroy the whole path.
if (removeKnot is CameraPathPositionKnot && m_Path.NumPositionKnots == 1) {
WidgetManager.m_Instance.DeleteCameraPath(this);
} else {
TrTransform knotXf = TrTransform.TR(pos, removeKnot.transform.rotation);
// Gather all the knots affected by this removal.
List<CameraPathKnot> pks = m_Path.GetKnotsOrphanedByKnotRemoval(removeKnot);
// If we have any knots affected by this change, we need to remove those first, before
// we remove the original knot. This is because, on undo, we need to add the parent
// first, before adding all the orphaned knots.
if (pks.Count > 0) {
BaseCommand parent = new BaseCommand();
for (int i = 0; i < pks.Count; ++i) {
TrTransform childXf = TrTransform.TR(pos, pks[i].transform.rotation);
new RemovePathKnotCommand(this, pks[i], childXf, parent);
}
new RemovePathKnotCommand(this, removeKnot, knotXf, parent);
SketchMemoryScript.m_Instance.PerformAndRecordCommand(parent);
} else {
SketchMemoryScript.m_Instance.PerformAndRecordCommand(
new RemovePathKnotCommand(this, removeKnot, knotXf));
}
}
// Reset collision results after a delete.
for (int i = 0; i < m_LastCollisionResults.Length; ++i) {
m_LastCollisionResults[i].Set(null, CameraPathKnot.kDefaultControl, null, null);
}
}
return removeKnot != null;
}