From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Tue, 30 Oct 2018 18:22:43 +0000 (+0000)
Subject: ksafe-base: wip, web
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=8b47f909e8ebd46b953900143f01e17637230ad4;p=reprap-play.git

ksafe-base: wip, web

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/ksafe-base.scad b/ksafe-base.scad
index adb2b35..0f881c3 100644
--- a/ksafe-base.scad
+++ b/ksafe-base.scad
@@ -7,15 +7,16 @@ bolthole_height = 4;
 bolthole_width = 10;
 main_sz = 30;
 cnr_rad = 10;
+lidinner_thick_allow = 20;
 
 // other parameters
 web_thick = 4;
+web_height = 20; // excluding wall and base thick
 bolthole_rhs = 20;
 bolthole_lhs = 20;
 boltreinf_thick = 6;
 anchor_wall_space = 45;
 base_thick = 4;
-lidinner_thick_allow = 20;
 space = 25;
 anchor_thick = 4;
 anchor_rad = 4;
@@ -42,6 +43,13 @@ module upp_app_Vars(t_bevel){
   $xppJ = $xppE + wall_thick * [ 1, tan(22.5) ];
   $xppI = $xppF + base_thick * [ tan(22.5), 1 ];
 
+  // must pass a_bevel for t_bevel for these to be valid
+  $gppP = gppA + [0,-1] * lidinner_thick_allow;
+  $gppQ = $gppP + [1,-1] * web_height;
+  $gppR = $xppJ + [ 1, tan(22.5) ] * web_height;
+  $gppS = $xppI + [ tan(22.5), 1 ] * web_height;
+  $gppT = [ $gppQ[0], $xppE[1] ];
+
   children();
 }
 
@@ -97,11 +105,38 @@ module AnchorWallProfile(){
   }
 }
 
+module WebProfile(){
+  upp_app_Vars(a_bevel){
+    if ($gppR[1] <= $gppP[1]) {
+      polygon([ $gppP,
+		$xppE,
+		$gppT,
+		$gppQ ]);
+      polygon([ $gppP,
+		$xppE,
+		$xppF,
+		$gppS,
+		$gppR ]);
+    } else {
+      polygon([ $gppP,
+		$xppE,
+		$xppF,
+		$gppS,
+		$gppP + web_height * [1,0] ]);
+    }
+    polygon([ $gppS,
+	      $xppF,
+	      $xppF + [1,0],
+	      $gppS + [1,0] ]);
+  }
+}
+
 module DemoProfiles(){
   translate([0,0,-2]) color("yellow") AnchorWallProfile();
   color("red") AnchorProfile();
   translate([0,0,2]) color("black") NearAnchorProfile();
   translate([0,0,4]) color("blue") UsualProfile();
+  translate([0,0,-4]) color("pink") WebProfile();
 }
 
 DemoProfiles();