X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=pattress-boxes-3-cover.scad;h=6122f5d0e95e452db38acce12fb4698305a5c4eb;hb=d11ada6d34595b332c8558d30a3bf42887c3aa44;hp=2799a3eccdee0e2a3dcc31e445b52dff655dadd1;hpb=3f425268628f2ce485b255d4d48544b55ca12d83;p=reprap-play.git

diff --git a/pattress-boxes-3-cover.scad b/pattress-boxes-3-cover.scad
index 2799a3e..6122f5d 100644
--- a/pattress-boxes-3-cover.scad
+++ b/pattress-boxes-3-cover.scad
@@ -16,6 +16,8 @@ lid_switches_y_slop = 3;
 total_len = 260;
 thinbox_len = 87;
 
+rail_overlap = 8;
+
 lid_top_wall = 1.5;
 lid_front_wall = 1.5;
 lid_side_wall = 1.5;
@@ -34,6 +36,7 @@ peg_outer_slop = 0.1;
 peg_slope = 1;
 
 lid_side_slop = 0.5;
+lid_rail_behindslop = 0.5;
 
 // computed
 
@@ -43,18 +46,23 @@ lid_inner_min_h = lid_fatbox_overlap + lid_fatbox_switches_h;
 
 lid_inner_kink = [thinbox_len, thinbox_len*2];
 
-lid_inner_w = patbox_side + lid_side_slop;
+lid_inner_w_nom = patbox_side;
+lid_inner_w = lid_inner_w_nom + lid_side_slop * 2;
 
-lid_rail_w = (lid_inner_w - lid_max_switches_w)/2 - lid_switches_y_slop;
+lid_seatline_w = (lid_inner_w - lid_max_switches_w)/2 - lid_switches_y_slop;
 
-lid_rail_h = lid_fatbox_switches_h;
+lid_seatline_h = lid_fatbox_switches_h;
 
-echo(lid_rail_w);
+echo(lid_seatline_w);
 
 peg_main_height = peg_straight_len + (peg_max_dia - peg_main_dia)/2/peg_slope;
 
 echo(peg_main_height);
 
+thinbox_front_z = lid_fatbox_switches_h + lid_fatbox_h - lid_thinbox_h;
+
+raillen = patbox_side/2 + rail_overlap;
+
 module LidSideProfile(){
   polygon([[-lid_top_wall,     lid_inner_max_h],
 	   [lid_inner_kink[0], lid_inner_max_h],
@@ -64,6 +72,19 @@ module LidSideProfile(){
 	   [-lid_top_wall,     -lid_front_wall]]);
 }
 
+module RailProfile(lslop=0.1){
+  yt_base = thinbox_front_z;
+  yt = yt_base - lid_rail_behindslop;
+  pegx = (lid_inner_w_nom - patbox_centres)/2;
+  
+  polygon([[-lslop,                  yt],
+	   [pegx - peg_main_dia/2, yt],
+	   [pegx - peg_main_dia/2, yt_base - peg_straight_len],
+	   [-lslop,
+	    yt_base - peg_straight_len - (pegx - peg_main_dia/2)/peg_slope
+	   -0.1]]);
+}
+
 module LidSide(){
   overlap = [0.1, 0.1, 0.1];
 
@@ -72,9 +93,9 @@ module LidSide(){
     linear_extrude(height= lid_side_wall)
     LidSideProfile();
 
-  // rail
+  // seatline
   translate(-overlap)
-    cube(overlap + [total_len, lid_rail_w, lid_rail_h]);
+    cube(overlap + [total_len, lid_seatline_w, lid_seatline_h]);
 
   // lid front
   translate([-0.1, -0.1, -lid_front_wall])
@@ -83,6 +104,12 @@ module LidSide(){
   // lid top
   translate([-lid_top_wall, -lid_side_wall, -lid_front_wall])
     cube([lid_top_wall, lid_inner_w/2 + 10, lid_front_wall + lid_inner_max_h]);
+
+  // rail
+  rotate([90,0,90])
+    translate([0,0,-0.1])
+    linear_extrude(height=raillen+0.1) //todo
+    RailProfile();
 }
 
 module PegProfile(){
@@ -121,7 +148,21 @@ module TopPattressBox(){
   }
 }
 
+module Demo(){
+  translate([0, -lid_inner_w/2, 0]) LidSide();
+  translate([0,0, thinbox_front_z])
+    rotate([0,180,0]) translate([0, -patbox_side/2, 0])
+    rotate([0,0,90]) union(){
+      %TopPattressBox();
+      color("blue") AtFixingCentres(){
+	rotate([180,0,0]) Peg();
+      }
+  }
+}
+
 //LidSide();
 //PegProfile();
 //Peg();
-TopPattressBox();
+//TopPattressBox();
+//RailProfile();
+Demo();