# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1390086259 -3600
# Node ID 6a9c1d13b576d01c63950b9ceaf1388954838cec
# Parent  d014204b2cc13a22150ee27dc735805a8758cef9
Added an initial attempt at the inner front edge cavity.

diff -r d014204b2cc1 -r 6a9c1d13b576 cartridge.scad
--- a/cartridge.scad	Sat Jan 18 22:07:33 2014 +0100
+++ b/cartridge.scad	Sun Jan 19 00:04:19 2014 +0100
@@ -57,6 +57,11 @@
 	inner_back_edge_height = 3.0;
 	inner_back_edge_depth = 1.5;
 
+	inner_front_edge_offset = 0.5;
+	inner_front_edge_width = 87.0;
+	inner_front_edge_height = 3.0;
+	inner_front_edge_depth = 1.5;
+
 	bottom_from_base = 13.5;
 
 	/* Side thicknesses. */
@@ -192,18 +197,32 @@
 							-inner_back_slope_depth]
 						]);
 
+		/* Inner back edge cavity. */
+
 		translate([inner_back_edge_width / 2,
 			depth / 2 - inner_back_edge_offset, -height / 2])
 			rotate([0, -90, 0])
 				linear_extrude(height = inner_back_edge_width)
 					polygon([
 						[-extra, -inner_back_edge_depth],
-						[0, -inner_back_edge_depth],
 						[inner_back_edge_height, -inner_back_edge_depth],
 						[0, 0],
 						[-extra, 0]
 						]);
 
+		/* Inner front edge cavity. */
+
+		translate([inner_front_edge_width / 2,
+			-depth / 2 + inner_front_edge_offset, -height / 2])
+			rotate([0, -90, 0])
+				linear_extrude(height = inner_front_edge_width)
+					polygon([
+						[-extra, 0],
+						[0, 0],
+						[inner_front_edge_height, inner_front_edge_depth],
+						[-extra, inner_front_edge_depth],
+						]);
+
 		/* Fillets to round off the edges. */
 
 		union() {