Distance to face (MeshFace) instead of plane

Replies to This Discussion

Permalink Reply by Steve Lewis on February 14, 2013 at 9:55pm

Look at the rtree class in rhinocommon

Permalink Reply by David Stasiuk on February 15, 2013 at 12:36am

Wow...I had no idea!  You don't know how helpful this thread is going to be for me.  Thanks!

Permalink Reply by Reino on February 15, 2013 at 12:28am

I think you can do it like this (and then check the value in the distance):

Permalink Reply by Rui Fortes on February 15, 2013 at 1:42am

I was thinking of avoiding the overhead of creating a trimmed surface.

This is for a component and it must be calculated fast.

I was thinking of making a mesh with that single triangular face, the use the intersect class to intersect a ray passing throught point having the face normal direction.

If it intersects the face then a simple plane.distanceto could be used.

If not, I would get the minimum distance from point to each of the face edges.

Is there a faster way? I'm fairly new to grasshopper and rhino api so I might be missing a lot of useful functions.

steve: I don't think rtree would be of much use in the distance calculation itself the point is already identified  but since I'm calculating this against a potentially large pointset to find the nearest one the nest step would be to use rtree to pre-filter points.I never used rtree but it seams it just selects points based on a sphere or box, I'm I right?

Permalink Reply by Reino on February 15, 2013 at 2:25am

I don't work with meshes myself, but there seems to be a Mesh CP too.
Then after you measure the distance between these points (be sure you graft it properly to avoid unwanted values)

Permalink Reply by Rui Fortes on February 15, 2013 at 3:01am

Thanks...thats even better :-)