Jump to content

Recommended Posts

Posted · [Plugin] Scaling cube from point down to Z=0

Hey guys!

 

I'm working on a plugin (for Cura 3.6+) to enable manual supports, and one of the features I want to add is to show some kind of "preview" of what area the support is going to be taking.

Right now, I'm creating a cube and adding it to a X,Y position using this code:
 

active_camera = self._controller.getScene().getActiveCamera()
picking_pass = PickingPass(active_camera.getViewportWidth(), active_camera.getViewportHeight())
picking_pass.render()

picked_position = picking_pass.getPickedPosition(event.x, event.y)

After that, the script creates a cube kinda manually (I'm basing myself on the SupportEraser plugin) with a value entered by the user. Thus, the cube has the same width, height and depth.
What I want to do is to make it as big in the Z axis as necessary so that it touches the build plate , and the user can see what it'd look like once it's processed.

Is there a way to scale it enough?

 

Thanks!

  • Link to post
    Share on other sites

    Posted · [Plugin] Scaling cube from point down to Z=0

    There are two things you can do; You can either create longer squares with the MeshBuilder and move them down a bit (since they are places based on their center) or you can scale the model (check the setScale function of the SceneNode that contains the meshdata)

  • Link to post
    Share on other sites

    Posted · [Plugin] Scaling cube from point down to Z=0

    Thanks for answering, nallath.

    I ended up doing this to create a cube that touches the buildplate:

    s = size / 2
    dtb = distance_to_buildplate
    verts = [ # 6 faces with 4 corners each
      [-s, -dtb,  s], [-s,  s,  s], [ s,  s,  s], [ s, -dtb,  s], # a = x-yz
      [-s,  s, -s], [-s, -dtb, -s], [ s, -dtb, -s], [ s,  s, -s], # b = x+yz
      [ s, -dtb, -s], [-s, -dtb, -s], [-s, -dtb,  s], [ s, -dtb,  s], # c = xy-z
      [-s,  s, -s], [ s,  s, -s], [ s,  s,  s], [-s,  s,  s], # d = xy+z 
      [-s, -dtb,  s], [-s, -dtb, -s], [-s,  s, -s], [-s,  s,  s], # e = +xyz
      [ s, -dtb, -s], [ s, -dtb,  s], [ s,  s,  s], [ s,  s, -s] # f = -xyz
    ]

    where "distance_to_buildplate" is the position in the Y axis of the cube when you click on the model, which is the same thing as the distance from the cube the ground.

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • UltiMaker Cura 5.9 stable released!
        Here comes Cura 5.9 and in this stable release we have lots of material and printer profiles for UltiMaker printers, including the newly released Sketch Sprint. Additionally, scarf seams have been introduced alongside even more print settings and improvements.  Check out the rest of this article to find out the details on all of that and more
          • Like
        • 5 replies
      • Introducing the UltiMaker Factor 4
        We are happy to announce the next evolution in the UltiMaker 3D printer lineup: the UltiMaker Factor 4 industrial-grade 3D printer, designed to take manufacturing to new levels of efficiency and reliability. Factor 4 is an end-to-end 3D printing solution for light industrial applications
          • Heart
          • Thanks
          • Like
        • 7 replies
    ×
    ×
    • Create New...