Dear Sir, How to get the outer points of a curved terrain? The example is as follows, the selected terrain is in blue. [Outer terrain]

one possible quick code snippet: sel = Sketchup.active_model.selection # Current selection edges = sel.grep(Sketchup::Edge) # grep out the edges vertices = edges.collect(&:vertices).flatten.uniq # find out vertices points = vertices.map(&:position) # get the positions

[image] dezmo: sel = Sketchup.active_model.selection # Current selection edges = sel.grep(Sketchup::Edge) # grep out the edges … then … outer_edges = edges.find_all { |edge| edge.faces.size == 1 } vertices = outer_edges.map(&:vertices).flatten.uniq points = vertices.map(&:position) # get the…

Oh, I missed the word “outer”… :blush:

[image] DanRathbun: outer_edges = edges.find_all { |edge| edge.faces.size == 1 } Taking a closer look at the original image and thinking over, maybe it’s even better: sel = Sketchup.active_model.selection # Current selection edges = sel.grep(Sketchup::Edge) # grep out the edges outer_edges =…

▶ (not enough coffee) ... disregard.

I have to argue. :slight_smile: We probably interpret the task in different ways? I made a very simplified version of the “terrain”, it is a 3x3 inch square grid just to easy simulate some selection and result of the sample snippet. test_outer_points.skp (15.8 KB) def test_outer_points sel = S…

[image] dezmo: What do you think? I know you cheated by changing the terms of the exercise. The OP stipulated a terrain mesh, which is triangulated.

[image] DanRathbun: which is triangulated . I fail to see how that makes a difference in the results.

[image] DanRathbun: I know you cheated by changing the terms of the exercise. I don’t think the terms were cheated, but sure my simplified example does not triangulated. This is does not make any difference about the result, as @Neil_Burkholder mentioned. (Just out of curiosity, I downloaded…

Sir,I have a question,is the mesh must be triangulated?The order of points acquired in this way is a bit messy.For example,in Test3, can I get test_outer_points output in a certain order?Like this: Example:[Point3d(1, 1, 0), Point3d(2, 1, 0), Point3d(3, 1, 0), Point3d(3, 2, 0), Point3d(2, 2, 0), Po…

How to get outer points of a curved terrain?

Developers Ruby API

DanRathbun February 2, 2021, 12:45pm 13

NO, I had a brain fart. Never mind what I said.

My eyes did not see the mesh outside the selection. So testing for 1 member face arrays would not work.

Sorry.

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How to get outer points of a curved terrain?

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