[OpenSCAD] text on stars

MichaelAtOz oz.at.michael at gmail.com
Thu Jun 16 21:47:25 EDT 2016


Lucy wrote
> Hi there! Quick openscad question: When placing text on a solid, how can
> you control the location? This code works for a different solid but not
> this one. Any suggestions are helpful. Here's what I've got:
> 
> // LetterBlock.scad - Basic usage of text() and linear_extrude()
> 
> // Module instantiation
> LetterBlock("proxima centauri");
> 
> // Module definition.
> // size=30 defines an optional parameter with a default value.
> module LetterBlock(letter, size=1000) {
>     difference() {
> hull(){ translate([95.0,-163.904109589,151.164383562])cube(0.1,0.1,0.1);
> translate([74.4927536232,-15.5072463768,158.043478261])cube(0.1,0.1,0.1);
> translate([95.0,5.0,35.0])cube(0.1,0.1,0.1);
> translate([95.0,-25.4301075269,171.935483871])cube(0.1,0.1,0.1);
> translate([68.0,-22.0,-149.6])cube(0.1,0.1,0.1);
> translate([95.0,5.0,-137.0])cube(0.1,0.1,0.1);
> translate([39.2764397906,-161.705759162,-188.248167539])cube(0.1,0.1,0.1);
> translate([95.0,-247.647058824,-158.235294118])cube(0.1,0.1,0.1);
> translate([59.9502982107,-110.546719682,-180.188866799])cube(0.1,0.1,0.1);
> translate([95.0,-77.6,-164.533333333])cube(0.1,0.1,0.1);
> translate([95.0,-254.594594595,-151.891891892])cube(0.1,0.1,0.1);
> translate([95.0,-270.688622754,121.706586826])cube(0.1,0.1,0.1);
> translate([63.2793546108,-274.709103757,110.753150395])cube(0.1,0.1,0.1);
> translate([-4.26742331864,-281.601632117,59.0591876935])cube(0.1,0.1,0.1);
> translate([10.2365415987,-272.349102773,-61.9738988581])cube(0.1,0.1,0.1);
> translate([-53.1773399015,-143.177339901,43.1403940887])cube(0.1,0.1,0.1);
> translate([-34.5580110497,-124.55801105,-129.08839779])cube(0.1,0.1,0.1);
> translate([-23.0774962742,-148.90461997,-145.715350224])cube(0.1,0.1,0.1);
> }       translate([-80,40,0])
> 
> {
>             // convexity is needed for correct preview
>             // since characters can be highly concave
>             linear_extrude(height=size, convexity=4)
>                 text(letter,
>                      size=size*3/30,
>                      font="Bitstream Vera Sans",
>                      halign="center",
>                      valign="center");
>         }
>     }
> }

Hi Lucy, welcome to the forum. 
Firstly, your post is still flagged as "This post has NOT been accepted by
the mailing list yet", so nobody gets it unless they look. 
You need to subscribe to the  mailing list
<http://forum.openscad.org/mailing_list/MailingListOptions.jtp?forum=1>  ,
and respond to the registration email.

Re positioning text, you use either rotate() and/or translate() to position
the text.
In your code you don't see the text because it is beside the solid. Add a
'#' at the front of the linear_extrude, ie #linear_extrude(height=size,
convexity=4), and you will see the text. It is way to big ATM.

So you need

translate([n,n,n])
  rotate([a,a,a])
   #linear_extrude(...)
      ...

Play with the numbers to move it around.




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