sealing-box.scad.m4

   1 // -*- C -*-
   2
   3 // This file can be used in two ways:
   4 //
   5 // A. Rectangular boxes
   6 //      1. include <sealing-box.scad>
   7 //      2. assign() values to (xxx these should be $ variables)
   8 //           $sealingbox_wallth
   9 //           $sealingbox_xbox (outer dimension)
  10 //           $sealingbox_ybox (outer dimension)
  11 //           $sealingbox_zbox (inner dimension)
  12 //           $sealingbox_ceilth
  13 //           $sealingbox_floorth
  14 //           $sealingbox_wallth
  15 //      3. use the modules
  16 //           SealingBox_RectBox
  17 //           SealingBox_RectLid
  18 //
  19 // B. Complicated shapes, but harder work
  20 //      1. Be a .m4 file and m4_include sealing-box.scad.m4
  21 //      2. Define your own BoxDoShapeSomething like BoxDoShapeRect
  22 //      3. Invoke BoxUseShape
  23 //      4. Use the Box and Lid modules generated
  24 //
  25 // Other settings
  26 //  $sealingbox_cnrrad
  27
  28 $sealingbox_cnrrad = 10;
  29
  30 m4_define(`BoxLocals',`
  31   xbox = $sealingbox_xbox;
  32   ybox = $sealingbox_ybox;
  33   zbox = $sealingbox_zbox;
  34   wall = $sealingbox_wallth;
  35   floorth = $sealingbox_floorth;
  36   ceilth = $sealingbox_ceilth;
  37   cnrrad = $sealingbox_cnrrad;
  38
  39   xbox_lin = xbox - cnrrad*2;
  40   ybox_lin = ybox - cnrrad*2;
  41
  42   innertube = 1.0 + 0.2;
  43   lidoverlap = 1.5;
  44   lidoverhang = 6;
  45   tubesealrad = 2.0;
  46 ')
  47
  48 m4_dnl Box_Part($1=transl_x,$2=transl_y, $3=rot_z,$4=mirror_xy)
  49 m4_dnl          $5=kind, $6=kindargs, $7=profile(profileargsargs))
  50 m4_define(`Box_Part',`
  51   translate([($1),($2)])
  52     rotate([0,0,($3)])
  53     mirror([($4),0,0])
  54     BoxPart_Extrude_$5($6, $7)') m4_dnl
  55
  56 boxpart_d = 0.01;
  57
  58 m4_dnl BoxPart_Extrude_Linear(dist, `profile(...);');
  59 m4_define(`BoxPart_Extrude_Linear',`
  60   rotate([90,0,0])
  61     translate([0,0, -($1)])
  62     linear_extrude(height= boxpart_d + ($1)) {
  63       $2
  64     }
  65 ')
  66
  67 m4_dnl BoxPart_Extrude_Arc(x0_radius, swept_angle, `profile(...);')
  68 m4_dnl  arc starting at transl_x, transl_y, moving towards positive
  69 m4_dnl  y at first and then bending towards negative x, until
  70 m4_dnl  use negative x0_radius to inciate bending towards positive x
  71 m4_dnl  swept_angle is reached
  72 m4_dnl  x0_radius is the radius of the extruded part at x=0, not of the box
  73 m4_define(`BoxPart_Extrude_Arc',`
  74   translate([-($1),0,0])
  75     intersection(){
  76       translate([0,0,-500])
  77         linear_extrude(height=1000)
  78         scale(500)
  79         mirror([($1)<0, 0,0])
  80         FArcSegment_mask($2);
  81       rotate_extrude(convexity=10, $fs=1, $fn=36)
  82         mirror([($1)<0, 0,0])
  83         translate([+($1),0,0]){
  84           $3
  85         }
  86     }
  87 ')
  88
  89 m4_dnl BoxDoShapeRect(`profile(profileargs)');
  90 m4_define(`BoxDoShapeRect',`
  91   Box_Part(0,           cnrrad,         0,0, Linear,`ybox_lin', `$1' )
  92   Box_Part(0,           ybox-cnrrad,    0,0, Arc,`-cnrrad,90' , `$1' )
  93   Box_Part(cnrrad,      ybox,         -90,0, Linear,`xbox_lin', `$1' )
  94   Box_Part(xbox-cnrrad, ybox,         -90,0, Arc,`-cnrrad,90' , `$1' )
  95   Box_Part(xbox,        ybox-cnrrad, -180,0, Linear,`ybox_lin', `$1' )
  96   Box_Part(xbox,        cnrrad,      -180,0, Arc,`-cnrrad,90' , `$1' )
  97   Box_Part(xbox-cnrrad, 0,           -270,0, Linear,`xbox_lin', `$1' )
  98   Box_Part(cnrrad,      0,           -270,0, Arc,`-cnrrad,90' , `$1' )
  99 ')
 100
 101 m4_dnl '
 102
 103 module SealingBox_WallProfile(){
 104   BoxLocals
 105   z = zbox - innertube - tubesealrad;
 106   translate([0, -0.1]) square([wall, z]);
 107   translate([tubesealrad, z]) circle(r=tubesealrad, $fn=20);
 108 }
 109
 110 module SealingBox_FloorProfile(){
 111   BoxLocals
 112   mirror([0,1]) square([wall, floorth]);
 113 }
 114
 115 module SealingBox_LidProfile(){
 116   BoxLocals
 117   rad = tubesealrad + innertube;
 118   morex = wall;
 119   difference(){
 120     translate([-lidoverlap - innertube,
 121                zbox - lidoverhang - innertube])
 122       square([lidoverlap + innertube + wall,
 123               lidoverhang + innertube + ceilth]);
 124     hull(){
 125       translate([tubesealrad,
 126                  zbox - innertube - tubesealrad])
 127         for (t=[ [0,0],
 128                  [morex*2, 0],
 129                  [0, -zbox]
 130                  ]) {
 131           translate(t)
 132             circle(r= tubesealrad + innertube, $fn=20);
 133         }
 134     }
 135   }
 136 }
 137
 138 module SealingBox_CeilProfile(){
 139   BoxLocals
 140   translate([0, zbox])
 141     square([wall*2, ceilth]);
 142 }
 143
 144 // BoxDoShape(Basename,BoxDoShapeSomething)
 145 // generates modules BasenameBox and BasenameLid
 146 m4_define(`BoxUseShape',`
 147   module $1Box(){
 148     BoxLocals
 149     $2(SealingBox_WallProfile(););
 150     hull(){ $2(SealingBox_FloorProfile();); }
 151   }
 152
 153   module $1Lid(){
 154     BoxLocals
 155     $2(SealingBox_LidProfile(););
 156     hull(){ $2(SealingBox_CeilProfile();); }
 157   }
 158 ')
 159
 160 BoxUseShape(`TestSealBox',`BoxDoShapeRect')