ICE Modeling - What is the most efficient way to get polygon index from vertex ids

[Alok Gandhi]

Hi all,

I have a tree doing subdivisions based on the camera ray. I filter out the vertex which are in the camera view based on the angle of the point normals with the the camera ray. I seem to get the good vertices, however what I actually want is the polygon index from these vertex id's. Right now I am taking the easiest (probably coolest !!)  locations approach, it seems to work, but with a few glitches (please see the attached images). 

Of course I can do some array manipulation to get the polygon from the vertices and get the results I want,  but I was thinking, is there another way ?


Also,  if I use the location --> get data --> some polygon attrtibute -- > elements to index, I don't get any poly indices !!!



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[Steven Caron]

first off ID to Location is for point clouds, use Point Index to Location?

[Alok Gandhi]

Well that definitely seems to change things, the middle polys are getting subdivided now. There are still a few glitches in the arctic and antarctic regions but I think that may be coming from my angle calculation logic. Thanks Steven !!

[Christian Gotzinger]

If you supply a vertex index and use "point index to location", hooked into "Get polygonindex", you won't really get what you want. After all, this particular location sits right on top of a vertex, and the vertex belongs to multiple polygons.

I would do the following (looking at your ICE tree):
Replace the "Get Point ID" by "Get self.VertextoPolygons". Then plug the result of the Filter directly into the Subdivide Locally.