public override void OnSelectionChanged(RenderControl render, PickedResult result)
{
var item = result.GetItem();
if (item.GetNode() == null)
{
return;
}
var ssn = BrepSceneNode.Cast(item.GetNode());
if (ssn == null)
{
return;
}
if (item.GetShapeType() == EnumShapeFilter.Face)
{
var face = ssn.GetShape().GetShape().FindChild(EnumTopoShapeType.Topo_FACE, (int)item.GetShapeIndex());
if (face != null)
{
var surface = new ParametricSurface(face);
var pt = item.GetPoint().GetPosition();
var param = surface.ComputeClosestPoint(pt.ToPnt(), GP.Resolution(), GP.Resolution());
var values = surface.D1(param.X(), param.Y());
var postion = Vector3.From(values.GetPoint());
var vecs = values.GetVectors();
var dir = Vector3.From(vecs[0].Crossed(vecs[1]));
dir.normalize();
mArrow.SetLocation(postion, dir);
mArrow.RequstUpdate();
mArrow.Update();
render.GetContext().GetSelection().Clear();
render.RequestDraw(EnumUpdateFlags.Scene);
}
}
}
