I’m trying to implement this Intersection.MeshRay overload through GHPython (i.e. that return the “faces on mesh that ray intersects”). I think I’ve got it working, but just wanted to check that I’m going about it properly. Calling the overload through IronPython seems a wee bit convoluted this way:
import Rhino as rc from System import Array import clr def meshRayIntersect(mesh,point,vector): """ Intersect a mesh with a ray, including intersected mesh face IDs """ ray = rc.Geometry.Ray3d(point,vector) faceIDs = clr.StrongBox[Array[int]]() rayP = rc.Geometry.Intersect.Intersection.MeshRay(mesh,ray,faceIDs) if rayP >= 0.0: rayPt = ray.PointAt(rayP) faceIDs = list(faceIDs.Value) return rayPt,faceIDs else: return None, None XPt, XIDs = meshRayIntersect(MyMesh,MyPoint,MyVector)
That is, having to instantiate an
Array inside a
StrongBox prior to calling
rc.Geometry.Intersect.Intersection.MeshRay just to return the faceIDs. I might be way off here
Edit: Removed small bug, in case anyone implements the code directly.