Hi, I am slightly new to three.js and was hoping anyone could help me use the Convex Hull class as I am not familiar with it. I have a bunch of vertices (shown in red) on a 3-D part. I would like the Convex Hull function to take all of these points and return only the outer points as shown. For the inner points I would like to calculate the center of the points that loop and remove the rest. Can someone explain how I can use the Convex hull class for this? The documentation doesn’t say much. I am also not sure if I should export some external document / class shown on the github docs for the same.
Unfortunately, you can’t use the class for your use case since the convex hull for this point set would look like so (red border):
That’s fine, I could acquire the remaining points on the curve on my own but I would like to know, more importantly, how to use the class.
AFAIK, the algorithm does not work for a 2D data structure. Does your shape has a volume?
Yes, the points you see are actually a bunch of points in 3-D space but they are all on the same plane.
In this case ConvexHull won’t work. It’s not allowed that the point set is coplanar.
I see, okay. Thanks!
Alternatively, is there any means to check if there is a hole in the geometry ? If I can detect a hole I can may be detect what points are in it and eliminate those.