single_plate/src/inc/roundCornersCube.scad

   1 /*
   2 http://codeviewer.org/view/code:1b36
   3 Copyright (C) 2011 Sergio Vilches
   4 This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
   5 This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
   6 Contact: s.vilches.e@gmail.com
   7
   8
   9     -----------------------------------------------------------
  10                  Round Corners Cube (Extruded)
  11       roundCornersCube(x,y,z,r) Where:
  12          - x = Xdir width
  13          - y = Ydir width
  14          - z = Height of the cube
  15          - r = Rounding radious
  16
  17       Example: roundCornerCube(10,10,2,1);
  18      *Some times it's needed to use F6 to see good results!
  19          -----------------------------------------------------------
  20 */
  21 // Test it!
  22 // roundCornersCube(10,5,2,1);
  23
  24
  25 module createMeniscus(h,radius) // This module creates the shape that needs to be substracted from a cube to make its corners rounded.
  26 difference(){        //This shape is basicly the difference between a quarter of cylinder and a cube
  27    translate([radius/2+0.1,radius/2+0.1,0]){
  28       cube([radius+0.2,radius+0.1,h+0.2],center=true);         // All that 0.x numbers are to avoid "ghost boundaries" when substracting
  29    }
  30
  31    cylinder(h=h+0.2,r=radius,$fn = 25,center=true);
  32 }
  33
  34
  35 module roundCornersCube(x,y,z,r)  // Now we just substract the shape we have created in the four corners
  36 difference(){
  37    cube([x,y,z], center=true);
  38
  39 translate([x/2-r,y/2-r]){  // We move to the first corner (x,y)
  40       rotate(0){
  41          createMeniscus(z,r); // And substract the meniscus
  42       }
  43    }
  44    translate([-x/2+r,y/2-r]){ // To the second corner (-x,y)
  45       rotate(90){
  46          createMeniscus(z,r); // But this time we have to rotate the meniscus 90 deg
  47       }
  48    }
  49       translate([-x/2+r,-y/2+r]){ // ...
  50       rotate(180){
  51          createMeniscus(z,r);
  52       }
  53    }
  54       translate([x/2-r,-y/2+r]){
  55       rotate(270){
  56          createMeniscus(z,r);
  57       }
  58    }
  59 }
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