X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=ksafe-base.scad;h=0f881c33401085b87af74c4688793ad09890abdf;hp=b2536af81f05fa49f37732f7a265229a73b7b18c;hb=8b47f909e8ebd46b953900143f01e17637230ad4;hpb=c5b9f398993c756ff4446a2ef09c66aa8d58d662

diff --git a/ksafe-base.scad b/ksafe-base.scad
index b2536af..0f881c3 100644
--- a/ksafe-base.scad
+++ b/ksafe-base.scad
@@ -1,33 +1,142 @@
 // -*- C -*-
 
-// xxx
+// xxx from actual ksafe
 bolt_above = 4;
 wall_thick = 4;
 bolthole_height = 4;
 bolthole_width = 10;
-base_thick = 5;
+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;
 space = 25;
 anchor_thick = 4;
 anchor_rad = 4;
-minbevel = space/2;
+bevel = 15;
+
+// ----- calculated -----
 
-// calculated
+gppA = [0,0];
+gppB = gppA - [ wall_thick, 0 ];
 
-uppA = [0,0];
-uppB = uppA - [ wall_thick, 0 ];
+gppL = [ gppB[0], -(lidinner_thick_allow + space + base_thick) ];
+
+// anchor
 
-uppL = [ uppB[0], -(lidinner_thick_allow + space + base_thick) ];
 anchor_b = anchor_thick + anchor_rad;
-uppM = uppL + anchor_b * [1,1];
+appM = gppL + anchor_b * [1,1];
+
+a_bevel = 2 * anchor_b * (1 + sqrt(0.5));
+
+module upp_app_Vars(t_bevel){
+  $xppE = gppL + t_bevel * [0,1];
+  $xppF = gppL + t_bevel * [1,0];
+
+  $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();
+}
 
-bevel = max(minbevel, 2 * anchor_b * (1 + sqrt(0.5)));
-uppE = uppL + bevel * [0,1];
-uppF = uppL + bevel * [1,0];
+module upp_app_Profile(){
+  polygon([ gppA,
+	    gppB,
+	    $xppE,
+	    $xppF,
+	    $xppF + [1,0],
+	    $xppI + [1,0],
+	    $xppJ ]);
+}
 
-uppJ = uppE + wall_thick * [ 1, tan(22.5) ];
-uppI = uppF + base_thick + [ tan(22.5), 1 ];
-uppH = upp
 
 module UsualProfile(){
-  
+  upp_app_Vars(bevel) upp_app_Profile();
+}
+
+module NearAnchorProfile(){
+  upp_app_Vars(a_bevel) upp_app_Profile();
+}
+
+module AnchorProfile(){
+  upp_app_Vars(a_bevel) {
+
+    upp_app_Profile();
+
+    difference(){
+      hull(){
+	polygon([ $xppE,
+		  $xppF,
+		  $xppF + [0,1],
+		  $xppE + [1,0] ]);
+	translate(appM) circle(r= anchor_b);
+      }
+      translate(appM) circle(r= anchor_rad);
+    }
+  }
+}
+
+module AnchorWallProfile(){
+  UsualProfile();
+  NearAnchorProfile();
+  hull(){
+    for (bev = [bevel, a_bevel]) {
+      upp_app_Vars(bev) {
+	polygon([ $xppE,
+		  $xppF,
+		  $xppI,
+		  $xppJ ]);
+      }
+    }
+  }
+}
+
+module WebProfile(){
+  upp_app_Vars(a_bevel){
+    if ($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();