How to use Ruby API

TIG

Edges, Loops, Curves, Faces, etc have vertices and those vertices have a position vertices.position (i.e. a point)
points have x/y/z values vertices.position.x
DON'T muddle them up!

honoluludesktop

OK, so how do I get the coordinate values for each vertex on each face.vertices? I think I understand vertex.position, and face.vertices, but how do I get a collection of vertex for each vertices.

Can't be impossible, can it?

Chris Fullmer

look at the Face.vertices here:

http://code.google.com/apis/sketchup/docs/ourdoc/face.html#vertices

it says what it returns - an array of vertx objects. So to get positions for all those vertices, you need to loop through that array. Something like this:

` vert_array = my_face.vertices
position_array = []
x_position_array = []

vert_array.each do |v|
position_array << v.position
x_position_array << v.position.x
end`

TIG

@honoluludesktop said:

OK, so how do I get the coordinate values for each vertex on each face.vertices? I think I understand vertex.position, and face.vertices, but how do I get a collection of vertex for each vertices.
Can't be impossible, can it?

That is not logical
If you have run vertices=face.vertices you already have a collection [i.e. an array] of the face's vertices !
If you then look at each of them you can get their positions as another array,
e.g. positions=[]; vertices.each{|v|positions<< v.position}
Now you can look at each 'position' in that array (i.e. it's a point) and get the x/y/z values etc
positions.each{|p|puts p.x;puts p.y;puts p.z}

You seem to making this more complicated than it needs to be...

honoluludesktop

AGH!!!, Thats what happens when you don't really know what you are doing. I think I got it, again:-) puts(face_pts.position.to_a) almost at the bottom. Basically, I took a "vertices", got tne number of points by "vertices.length", then extracted each "vertex" by "This_number=vertices[0 to (length-1)]". The following runs in Web Console.


model = Sketchup.active_model
entities = model.entities
selection = model.selection

if model.selection.empty?
	entities = model.active_entities
else
	entities = model.selection
end

def open_comp_inst_file(comp_inst_name,model)
	comp_inst_file_name=File.basename(model.path)
	path=File.dirname(model.path)+"\\"
	out_name=comp_inst_name+".txt"
	out_path=path+out_name
	$dxf_ci_file=File.open(out_path,"w")
end

entities.each do |e|
	if e.is_a? Sketchup;;ComponentInstance
		puts("Component")
		comp_inst_name=e.definition.name
		comp_inst_collection=e.definition.entities
		#open text file for output
		#open_comp_inst_file(comp_inst_name,model)
		comp_inst_collection.each do |e|
			comp_inst_faces_collection=[]
			if e.is_a? Sketchup;;Face
				#make collection of faces
				comp_inst_faces_collection.push e
				vertices_collection=[]
				comp_inst_faces_collection.each do |e|
						if e.vertices
							#vertice collection
							vertices_collection.push e.vertices
							vertices_collection.each do |e|
								no_vert=e.length
								cnt_vert=no_vert
								puts("Vertices")
								no_vert.times do
									face_pts=(e[no_vert-cnt_vert])
									cnt_vert=cnt_vert-1
									puts("Vertex")
									puts(face_pts.position.to_a)
								end
							end
						end
				end #loop
			end #if
		end #loop
		#close text file
		#$dxf_ci_file.close
	end 
end

Here is some sample output:
%(#408000)[Start Component
Starts Vertices
Start Vertex
69.6952995222671
5.52489094225734
0.0
Start Vertex
26.421563780178
0.0
0.0
Start Vertex
0.0
34.7137089981752
0.0
Start Vertex
16.8521719619112
74.9523089386077
0.0
.
.]
Looks OK?

Jim

@honoluludesktop said:

AGH!!!, Thats what happens when you don't really know what you are doing.

Well, what are you doing? Try to make a precise statement of the purpose of the routine. In
English first, then Ruby.

This prints a summary of faces and vertices in the Definitions.

    model = Sketchup.active_model
    entities = model.entities
    selection = model.selection

    if model.selection.empty?
        entities = model.active_entities
    else
        entities = model.selection
    end

    instance_count = 0
    entities.each do |e|
        if e.is_a? Sketchup;;ComponentInstance
            instance_count += 1
            puts("Component; #{instance_count} #{e.definition.name}")
            face_count = 0
            e.definition.entities.each do |e|
                if e.is_a? Sketchup;;Face
                    face_count += 1
                    puts "  face; #{face_count}"
                    vertex_count = 0
                    e.vertices.each do |v|
                        vertex_count += 1
                        puts "    vertex #{vertex_count} id;#{v.object_id}  pos;#{v.position}"
                    end
                end
            end
        end
    end

Note since some faces share vertices, and all vertices are listed, some vertives will be duplicated.

Component; 2 Component#2
  face; 1
    vertex 1 id;48589944  pos;(2.160711", 1.853015", 0")
    vertex 2 id;48589932  pos;(0", 1.853015", 0")
    vertex 3 id;48589920  pos;(0", 1.853015", 2.160338")
    vertex 4 id;48589908  pos;(2.160711", 1.853015", 2.160338")
  face; 2
    vertex 1 id;48589944  pos;(2.160711", 1.853015", 0")
    vertex 2 id;48589692  pos;(2.160711", 0", 0")
    vertex 3 id;48589680  pos;(0", 0", 0")
    vertex 4 id;48589932  pos;(0", 1.853015", 0")
  face; 3
    vertex 1 id;48589680  pos;(0", 0", 0")
    vertex 2 id;48589692  pos;(2.160711", 0", 0")
    vertex 3 id;48589464  pos;(2.160711", 0", 2.160338")
    vertex 4 id;48589452  pos;(0", 0", 2.160338")
  face; 4
    vertex 1 id;48589932  pos;(0", 1.853015", 0")
    vertex 2 id;48589680  pos;(0", 0", 0")
    vertex 3 id;48589452  pos;(0", 0", 2.160338")
    vertex 4 id;48589920  pos;(0", 1.853015", 2.160338")
  face; 5
    vertex 1 id;48589464  pos;(2.160711", 0", 2.160338")
    vertex 2 id;48589908  pos;(2.160711", 1.853015", 2.160338")
    vertex 3 id;48589920  pos;(0", 1.853015", 2.160338")
    vertex 4 id;48589452  pos;(0", 0", 2.160338")
  face; 6
    vertex 1 id;48589692  pos;(2.160711", 0", 0")
    vertex 2 id;48589944  pos;(2.160711", 1.853015", 0")
    vertex 3 id;48589908  pos;(2.160711", 1.853015", 2.160338")
    vertex 4 id;48589464  pos;(2.160711", 0", 2.160338")

honoluludesktop

WOW! very compact, and fast, I will take a hard look at your code, and learn from it. Lets see how far I can get before having to post for help

Addenda: Well, I did have redundant code, and really need to learn how to format output. Would have never figured out Puts "#{e.position.x.to_f}" by myself.

honoluludesktop

Darn, I finished coding only to discover the "putdxf" I use for my CAD import has a bug that fails to locate multiple blocks correctly. I confirmed this by being unable to "putdxf" with the system's "getdxf". Will have to rewrite as a "command line" script. Thanks for everything, sorry I couldn't understand much of what you tried to explain to me. But, because of your help, I will get better in time