[REQ] label points with same X,Y Coordinates -pointcloud aid

[halroach]

Using points_cloud_triangulation.rb

In some cases there are whole areas that aren't triangulated, or areas that the triangulation is overlapping. (see images)
following the error message in the console, I figured that the problem occurs when there are points that share a common X,Y coordinate (on a different Z).

It is a tedious task to find these points throughout a large model. I was wondering if there might be a script to label points that share the same Z? something similar to labeling stray lines - in "stray lines.rb".
Or if anybody knows how to write a script that would do that!?

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[TIG]

Try this

require 'sketchup.rb'
def cpointseqxy()
  model=Sketchup.active_model
  ents=model.active_entities
  layers=model.layers
  tlayer=layers.add("cpointseqxy")
  sel=model.selection
  sela=sel.to_a
  sel.clear
  model.start_operation("cpointseqxy")
  cs=[]
  ca=[]
  sela.each{|e|
    cs<< e if e.class==Sketchup;;ConstructionPoint
    ca<< e if e.class==Sketchup;;ConstructionPoint
  }
  th=[]
  ch=[]
  lh=[]
  ca.each{|c|
    cx=[]
    cs.each{|e|
      next if c.to_s == e.to_s 
      if c.position.x == e.position.x and c.position.y == e.position.y
        cx<< e
        ch<< e
        t=ents.add_text(" =XY",e.position)
        th<< t
        l=ents.add_cline(c.position,e.position)
        lh<< l
      end#if
    }
    cs=cs-cx
  }
  th.each{|t|t.layer=tlayer}
  lh.each{|l|l.layer=tlayer}
  sel.add(th+ch+lh)
  model.commit_operation
end

Copy + Paste the code into a file in the Plugins folder called cpointseqxy.rb.
Restart SUp and select everything [only cpoints get processes anyway].
In the Ruby Console type cpointseqxy and all cpoints with common X & Y values are highlighted and highlighted =XY text is added next to each of them, also a highlighted vertical cline is added between them. Note that the text and clines are also put onto a layer called 'cpointseqxy' - so you can isolate them or delete them more easily [by deleting the layer and its contents]...

[Didier Bur]

Hi,

@unknownuser said:

the problem occurs when there are points that share a common X,Y coordinate (on a different Z)

Correct. Delauney algorithm is a 2D triangulation process, sort of. Having 2 points at the same location (plan view) breaks it.

Note: the "Points are not planar" error can also occur if 2 points are very very very close to each other. It is a Sketchup "add_face" method issue, IMHO.

[halroach]

Very nice TIG! You're the man!
It works wonderfully!

Could you have the text that's added, with arrows just like in "straylines.rb". I think it would make it easier on the eyes to find the points. I've added one arrow to demonstrate the difference, see attached image.

Thanks! really great!!

[halroach]

@didier bur said:

Note: the "Points are not planar" error can also occur if 2 points are very very very close to each other. It is a Sketchup "add_face" method issue, IMHO.

There is a way to overcome the problem of very close points not closing faces. scale the the model x10. add the faces, and then rescale by .1. It usually works.

Thanks guys!

[TIG]

Try this

require 'sketchup.rb'
    def cpointseqxy()
      model=Sketchup.active_model
      ents=model.active_entities
      layers=model.layers
      tlayer=layers.add("cpointseqxy")
      sel=model.selection
      sela=sel.to_a
      sel.clear
      vec=[10,10,10] ### change these values for arrow length
      model.start_operation("cpointseqxy")
      cs=[]
      ca=[]
      sela.each{|e|
        cs<< e if e.class==Sketchup;;ConstructionPoint
        ca<< e if e.class==Sketchup;;ConstructionPoint
      }
      th=[]
      ch=[]
      lh=[]
      ca.each{|c|
        cx=[]
        cs.each{|e|
          next if c.to_s == e.to_s
          if c.position.x == e.position.x and c.position.y == e.position.y
            cx<< e
            ch<< e
            t=ents.add_text(" =XY",e.position,vec)
            th<< t
            l=ents.add_cline(c.position,e.position)
            lh<< l
          end#if
        }
        cs=cs-cx
      }
      th.each{|t|t.layer=tlayer}
      lh.each{|l|l.layer=tlayer}
      sel.add(th+ch+lh)
      model.commit_operation
    end

This has arrows for the text: vec=[10,10,10] sets the arrows 'vector', adjust the value of it to change the leader location, length etc...