sketchucation logo sketchucation
    • Login
    ℹ️ Licensed Extensions | FredoBatch, ElevationProfile, FredoSketch, LayOps, MatSim and Pic2Shape will require license from Sept 1st More Info

    [Plugin] Hatchfaces (v1.8 beta) UPDATED 15-Dec-2012

    Scheduled Pinned Locked Moved Plugins
    360 Posts 41 Posters 228.5k Views 41 Watching
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • jolranJ Offline
      jolran
      last edited by

      Things are not going so well. Doing a pattern like on the picture will be difficult.
      Unless black and white. That's no problem to do.

      TIG recommended to clone current selection to avoid bugsplats. I'm fine with that as long as doing faces only.

      But that won't give much flexibility if doing a pattern like on the picture.
      How to clone the edges from an array? And what if you have an edgeloop where you DON'T want a face?
      And materials are still a big problems. If it where only 1 material, things would be relatively easy.
      I guess faces can have attributes like materials, but how to store them and transfer to the face_clone is the question.

      I'm thinking doing an intersection with face, then recreate the facecolor pattern and erase vertices outside the face.
      ATM I get splats when using lot of patterns or nested components with intersection. Things are a lot more stable, since
      being able to explode all the components and add entities to group AFTER the group was created.
      Using few components with plenty geometry is OK. Many components are bad. Even if they contain few entities..

      Could need a push with the materials.. Otherwise I probably will have to restrict the plugin features.


      wierd_pattern.jpg

      1 Reply Last reply Reply Quote 0
      • TIGT Offline
        TIG Moderator
        last edited by

        I'm still not entirely sure what you are are trying to do πŸ˜’
        If you want add colored shapes onto a face as a hatch pattern try this...
        Make the cloned face inside the group.
        Add the instances to the group.entities, placed where you will.
        Apply materials to these instances.
        Explode the instances and the default materials in them become their face materials and they merge with the background face.
        Now you need to erase the bits outside of the face bounds.
        Test all of the edges in the group.
        Test their start.position and end.position, on the original face with classify_point to see if that point is 'on the face' [you need also to cover on edge, on vertex and not in hole etc] if both point test OK it's inside the original face. If one or both of them are not the you want to erase them - push into an edges2go array. The erase all of those edges and the faces go with them. Finally erase any faces with 'nil' material [in the gaps from the cloned face], and then any unfaced edges if you don't want a perimeter. You should now be left with the colored shapes trimmed to the original face's edges.

        TIG

        1 Reply Last reply Reply Quote 0
        • jolranJ Offline
          jolran
          last edited by

          Thank's TIG, I will try.

          1 Reply Last reply Reply Quote 0
          • jolranJ Offline
            jolran
            last edited by

            Actually when I reread you post TIG. It is probably the way to go.

            I had the idea to make a huge face. Same size as entities.bounds. Add the edgeloops from original selected face.
            And then delete the original face. (Sort of oposite of the face). Then do an intersection with the components.
            The result of intersection could be deleted, and all what's desired would then remain..
            It is all theoretical..

            1 Reply Last reply Reply Quote 0
            • jolranJ Offline
              jolran
              last edited by

              I will test TIG' solution tomorrow, if time gives. I have another test to do.

              If someone please tell me how I can get the pt's from a boundingbox object. It will only be 4 pt's, boundingbox from 2d hatches.. Will create a face from those points later. Had a look at Thomthoms edges from boundingbox, but it's for a whole "cube" boundingbox. Don't need that much information his script gives.

              I've tried something like this. But it doesent work.

              	centbox=gp2.bounds  #boundingbox object
              			 centpoints=[]; range=(0..7); centbox.corner.range.each{|e| 
              			  if e.valid? and e.class==Geom;;Point3d
              			 
              			      centpoints << e
              			   end
              			 }
              			 
              

              Edited. It probably should be centbox.corner.range. I changed the original. Still doesent work..

              1 Reply Last reply Reply Quote 0
              • TIGT Offline
                TIG Moderator
                last edited by

                You don't want the limits of a bounding-box - it's a rectangle, the face might be a circle ! Use my selected_face.classify_points(pt) tests for all edges after the explode/intersect etc...

                TIG

                1 Reply Last reply Reply Quote 0
                • jolranJ Offline
                  jolran
                  last edited by

                  Really? 😲 Bounds=boundingbox, no?

                  So boundingbox will not be like on the picture? darn... Typical.


                  circle.jpg

                  1 Reply Last reply Reply Quote 0
                  • TIGT Offline
                    TIG Moderator
                    last edited by

                    entity.bounds== a bounding-box rectangular cube - even if the object is the shape of a banana 🀣

                    Use selected_face.classify_point() tests πŸ˜’

                    TIG

                    1 Reply Last reply Reply Quote 0
                    • jolranJ Offline
                      jolran
                      last edited by

                      Yes. That's what I want πŸ˜„

                      It's for the exterior bounds of ALL entities, not the face. Then from that huge face do a boolean with the selected face.
                      If you intersect with the result from that you have everything intersected in a group wich can be deleted?
                      But ok, I will try what you say.

                      BTW. An exploded comp. don't always transfer the materials to the face lying underneath? It's risky.

                      1 Reply Last reply Reply Quote 0
                      • jolranJ Offline
                        jolran
                        last edited by

                        No. Exploded instances do not merge materials to the face lying underneath. Is it supposed to happend?

                        1 Reply Last reply Reply Quote 0
                        • TIGT Offline
                          TIG Moderator
                          last edited by

                          On an explode it should [untested].
                          Alternative 'intersect' after the explode ??

                          TIG

                          1 Reply Last reply Reply Quote 0
                          • jolranJ Offline
                            jolran
                            last edited by

                            Well lately I have done quite a few intersects. And the results vary. But no. Materials get lost=white default material.
                            However I will try intersection after exploding things.

                            Thanks.

                            Edited. Not very good results. Things are very negative at the moment. Exploding geometry connected to a face has very destructive behavior. On top of that materials don't get transfered properly, and that was the whole idea of this process.

                            There is more problems. Let's say I can recreate the face-clone first. No problem!
                            On top of the face-clone, recreate the whole component instance. Faces, edges without faces, and materials, in code.
                            Problem here is that I would probably have to do an intersect_with the face_clone, so the edges get connected and form new vertices at the edge crossings. And there the face materials would get lost...In the intersect_with method.

                            There is an theoretical alternative! I woulden't mind the opinions from TIG on this one:
                            If doing an component intersect_with face.edgeloops without face? That would at least give new vertices so the unwanted edges theoretical could be removed. Without affecting materials and destructive behavior (tested). But like the method TIG recommended, selected_face.classify_point(). One would need a face to compare against.
                            Could the face be in a different group? And deleted after comparison? What say you Massa TIG?

                            1 Reply Last reply Reply Quote 0
                            • jolranJ Offline
                              jolran
                              last edited by

                              Yes. Something positive!

                              An intersect between component(hatch-pattern) and face-clone's edge loops(no face). Gives you new vertices. Without affecting materials and destroying faces! so now it's possible to erase all edges and vertices outside the face.

                              Will see if it's possible to make a comparison against a face in a group. Can't explode it! Destroys everything.

                              1 Reply Last reply Reply Quote 0
                              • TIGT Offline
                                TIG Moderator
                                last edited by

                                You can test if a point on a preselected-face in another entities context - BUT you might need to transform! the point by its container[s] transformation back to align with the preselected-face ?

                                TIG

                                1 Reply Last reply Reply Quote 0
                                • jolranJ Offline
                                  jolran
                                  last edited by

                                  Ah, sounds great, thanks. I will will try that now. Been busy with some other stuff..

                                  1 Reply Last reply Reply Quote 0
                                  • jolranJ Offline
                                    jolran
                                    last edited by

                                    I think I have a collection of points outside the face now. Plenty of iteration...
                                    There is no way to see the real result until it starts deleting edges. Anyway, see some collection when
                                    using puts.array of points to go

                                    Simple question how do I convert those pt to vertices? Is there a simple way or another comparison?
                                    I guess if getting the collection of vertices it's just a matter of deleting edges connected to that vertice. Edge.used_by?(collection of vertices) ?

                                    1 Reply Last reply Reply Quote 0
                                    • jolranJ Offline
                                      jolran
                                      last edited by

                                      Hang on! Edge.end and edge.start is vertex objects. I can't use them as point when using face.classify_point()???
                                      In the API face.classify_points needs points as arguments.

                                      How come I get a result from array.length? Strange... Or is there some equallity between points and vertices I'm not aware of? πŸ˜•

                                      Edited apparently πŸ˜„ I get some edge deleted. Almost there I think! Only did comparison against face. Maybe need against
                                      other entities as well.

                                      1 Reply Last reply Reply Quote 0
                                      • jolranJ Offline
                                        jolran
                                        last edited by

                                        YEEEEEESSSSSSSS!!! ATM I am VERY happY!!

                                        I'm sure there are things tome come that will put me off. BUT at least it's going forward!

                                        I made the misstake of putting the collection of edges BEFORE the intersection. Had some problems with classify points to
                                        edge removals. Anyway look at the picture! It has curves and circles to, with materials.
                                        Now. Must convert it to component, so faces will cut underlying face and materials will get cleaner.
                                        That's for tomorrow!


                                        smiley.jpg

                                        1 Reply Last reply Reply Quote 0
                                        • jolranJ Offline
                                          jolran
                                          last edited by

                                          More tests. Overlapping components get intersected well. It's quite computable.. So one have to be careful not to overdo it I think.. We will see...This is all in 1 go. But I suppose one can split the computation up in several goes.
                                          When I come and think of it. This is a 2D boolean!!


                                          more tests.jpg

                                          1 Reply Last reply Reply Quote 0
                                          • TIGT Offline
                                            TIG Moderator
                                            last edited by

                                            Do you now need to erase the uncolored faces or is that done ?

                                            To avoid the 'z-fighting' with the existing face you could move the new group say 1mm in the originally_selected_face.normal so it's avoided...

                                            You have indeed made a 2d-boolean tools... well done πŸ€“

                                            TIG

                                            1 Reply Last reply Reply Quote 0
                                            • 1
                                            • 2
                                            • 7
                                            • 8
                                            • 9
                                            • 10
                                            • 11
                                            • 17
                                            • 18
                                            • 9 / 18
                                            • First post
                                              Last post
                                            Buy SketchPlus
                                            Buy SUbD
                                            Buy WrapR
                                            Buy eBook
                                            Buy Modelur
                                            Buy Vertex Tools
                                            Buy SketchCuisine
                                            Buy FormFonts

                                            Advertisement