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
  43 m4_dnl Box_Part($1=transl_x,$2=transl_y, $3=rot_z,$4=mirror_xy)
  44 m4_dnl          $5=kind, $6=kindargs, $7=profile(profileargsargs))
  45 m4_define(`Box_Part',`
  46   translate([($1),($2)])
  47     rotate([0,0,($3)])
  48     mirror([($4),0,0])
  49     BoxPart_Extrude_$5($6, $7)') m4_dnl
  50
  51 boxpart_d = 0.01;
  52
  53 m4_dnl BoxPart_Extrude_Linear(dist, `profile(...);');
  54 m4_define(`BoxPart_Extrude_Linear',`
  55   rotate([90,0,0])
  56     translate([0,0, -($1)])
  57     linear_extrude(height= boxpart_d + ($1)) {
  58       $2
  59     }
  60 ')
  61
  62 m4_dnl BoxPart_Extrude_Arc(x0_radius, swept_angle, `profile(...);')
  63 m4_dnl  arc starting at transl_x, transl_y, moving towards positive
  64 m4_dnl  y at first and then bending towards negative x, until
  65 m4_dnl  use negative x0_radius to inciate bending towards positive x
  66 m4_dnl  swept_angle is reached
  67 m4_dnl  x0_radius is the radius of the extruded part at x=0, not of the box
  68 m4_define(`BoxPart_Extrude_Arc',`
  69   translate([-($1),0,0])
  70     intersection(){
  71       translate([0,0,-500])
  72         linear_extrude(height=1000)
  73         scale(500)
  74         mirror([($1)<0, 0,0])
  75         FArcSegment_mask($2);
  76       rotate_extrude(convexity=10, $fs=1, $fn=36)
  77         mirror([($1)<0, 0,0])
  78         translate([+($1),0,0]){
  79           $3
  80         }
  81     }
  82 ')
  83
  84 m4_dnl BoxDoShapeRect(`profile(profileargs)');
  85 m4_define(`BoxDoShapeRect',`
  86   Box_Part(0,           cnrrad,         0,0, Linear,`ybox_lin', `$1' )
  87   Box_Part(0,           ybox-cnrrad,    0,0, Arc,`-cnrrad,90' , `$1' )
  88   Box_Part(cnrrad,      ybox,         -90,0, Linear,`xbox_lin', `$1' )
  89   Box_Part(xbox-cnrrad, ybox,         -90,0, Arc,`-cnrrad,90' , `$1' )
  90   Box_Part(xbox,        ybox-cnrrad, -180,0, Linear,`ybox_lin', `$1' )
  91   Box_Part(xbox,        cnrrad,      -180,0, Arc,`-cnrrad,90' , `$1' )
  92   Box_Part(xbox-cnrrad, 0,           -270,0, Linear,`xbox_lin', `$1' )
  93   Box_Part(cnrrad,      0,           -270,0, Arc,`-cnrrad,90' , `$1' )
  94 ')
  95
  96 m4_dnl '
  97
  98 module SealingBox_WallProfile(){
  99   BoxLocals
 100   z = zbox - innertube - tubesealrad;
 101   translate([0, -0.1]) square([wall, z]);
 102   translate([tubesealrad, z]) circle(r=tubesealrad, $fn=20);
 103 }
 104
 105 module SealingBox_FloorProfile(){
 106   BoxLocals
 107   mirror([0,1]) square([wall, floorth]);
 108 }
 109
 110 module SealingBox_LidProfile(){
 111   BoxLocals
 112   rad = tubesealrad + innertube;
 113   morex = wall;
 114   difference(){
 115     translate([-lidoverlap - innertube,
 116                zbox - lidoverhang - innertube])
 117       square([lidoverlap + innertube + wall,
 118               lidoverhang + innertube + ceilth]);
 119     hull(){
 120       translate([tubesealrad,
 121                  zbox - innertube - tubesealrad])
 122         for (t=[ [0,0],
 123                  [morex*2, 0],
 124                  [0, -zbox]
 125                  ]) {
 126           translate(t)
 127             circle(r= tubesealrad + innertube, $fn=20);
 128         }
 129     }
 130   }
 131 }
 132
 133 module SealingBox_CeilProfile(){
 134   BoxLocals
 135   translate([0, zbox])
 136     square([wall*2, ceilth]);
 137 }
 138
 139 // BoxDoShape(Basename,BoxDoShapeSomething)
 140 // generates modules BasenameBox and BasenameLid
 141 m4_define(`BoxUseShape',`
 142   module $1Box(){
 143     BoxLocals
 144     $2(SealingBox_WallProfile(););
 145     hull(){ $2(SealingBox_FloorProfile();); }
 146   }
 147
 148   module $1Lid(){
 149     BoxLocals
 150     $2(SealingBox_LidProfile(););
 151     hull(){ $2(SealingBox_CeilProfile();); }
 152   }
 153 ')
 154
 155 BoxUseShape(`TestSealBox',`BoxDoShapeRect')