X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=sealing-box.scad.m4;h=33b1069ecce0fb45c9a0ee25e2a458d558fa1f5f;hb=08eff150d30933b2df40a080607437ffbd3260ba;hp=3221b2bbbab97d586be86542da5aaba93b3d776a;hpb=62bc4f2988854880fa9c8bc6901e6b0aae4e0e85;p=reprap-play.git

diff --git a/sealing-box.scad.m4 b/sealing-box.scad.m4
index 3221b2b..33b1069 100644
--- a/sealing-box.scad.m4
+++ b/sealing-box.scad.m4
@@ -16,7 +16,9 @@
 //
 // B. Complicated shapes, but harder work
 //      1. Be a .m4 file and m4_include sealing-box.scad.m4
-//      2. Maybe define your own BoxDoShapeRect xxx tbd
+//      2. Define your own BoxDoShapeSomething like BoxDoShapeRect
+//      3. Invoke BoxUseShape
+//      4. Use the Box and Lid modules generated
 
 m4_dnl Box_Part($1=transl_x,$2=transl_y, $3=rot_z,$4=mirror_xy)
 m4_dnl          $5=kind, $6=kindargs, $7=profile(profileargsargs))
@@ -59,10 +61,12 @@ m4_define(`BoxPart_Extrude_Arc',`
     }
 ')
 
-ts_cidoff = (ts_cnrrad * (1-.7) + wallthick * .8) * [1,1];
+m4_define(`BoxLocals',`
+  ts_cidoff = (ts_cnrrad * (1-.7) + wallthick * .8) * [1,1];
 
-ts_xbox_lin = ts_xbox - ts_cnrrad*2;
-ts_ybox_lin = ts_ybox - ts_cnrrad*2;
+  ts_xbox_lin = ts_xbox - ts_cnrrad*2;
+  ts_ybox_lin = ts_ybox - ts_cnrrad*2;
+')
 
 m4_dnl BoxDoShapeRect(`profile(profileargs)');
 m4_define(`BoxDoShapeRect',`
@@ -79,16 +83,19 @@ m4_define(`BoxDoShapeRect',`
 m4_dnl '
 
 module SealingBox_WallProfile(){
+  BoxLocals
   z = ts_zbox - innertube - tubesealrad;
   translate([0, -0.1]) square([wallthick, z]);
   translate([tubesealrad, z]) circle(r=tubesealrad, $fn=20);
 }
 
 module SealingBox_FloorProfile(){
+  BoxLocals
   mirror([0,1]) square([wallthick, floorth]);
 }
 
 module SealingBox_LidProfile(){
+  BoxLocals
   rad = tubesealrad + innertube;
   morex = wallthick;
   difference(){
@@ -111,6 +118,7 @@ module SealingBox_LidProfile(){
 }
 
 module SealingBox_CeilProfile(){
+  BoxLocals
   translate([0, ts_zbox])
     square([wallthick*2, ceilth]);
 }
@@ -119,11 +127,13 @@ module SealingBox_CeilProfile(){
 // generates modules BasenameBox and BasenameLid
 m4_define(`BoxUseShape',`
   module $1Box(){
+    BoxLocals
     $2(SealingBox_WallProfile(););
     hull(){ $2(SealingBox_FloorProfile();); }
   }
 
   module $1Lid(){
+    BoxLocals
     $2(SealingBox_LidProfile(););
     hull(){ $2(SealingBox_CeilProfile();); }
   }