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module mold(
size, /* mold inner size */
s=1, /* shell thickness */
h_protrude=-1, /* how far to protrude outside horizontally, default is size[2] */
v_protrude=10, /* and vertically */
l_intrude=0, /* how far to intrude on the left */
r_intrude=0, /* how far to intrude on the right */
f_intrude=0, /* how far to intrude on the front */
introffset, /* offset from the front of the left and right intrusions */
chamfer=1
) {
difference() {
cube(size=[size[0]+2*s,size[1]+2*s,size[2]+s]);
translate([s,s,s]) {
hull() {
translate([chamfer,0,chamfer])
cube(size=[size[0]-2*chamfer,size[1],size[2]-2*chamfer]);
translate([0,chamfer,chamfer])
cube(size=[size[0],size[1]-2*chamfer,size[2]-2*chamfer]);
translate([chamfer,chamfer,0])
cube(size=[size[0]-2*chamfer,size[1]-2*chamfer,size[2]+1]);
}
}
}
gw = 3*s; // guide width, in case I'll want to change it.
h_protrude_ = h_protrude<0 ? size[2] : h_protrude;
module trusion(in,gw=gw,h_protrude=h_protrude_) {
translate([-gw/2,0,s+size[2]]) union() {
hull() {
translate([0,0,in])
cube(size=[gw,in+s,v_protrude-in]);
cube(size=[gw,s,in]);
}
hull() {
translate([0,0,-h_protrude])
cube(size=[gw,s,v_protrude+h_protrude]);
translate([0,-h_protrude,0])
cube(size=[gw,s+h_protrude,v_protrude]);
}
}
}
/* frontal guide */
translate([s+size[0]/2,0,]) trusion(in=f_intrude);
/* left guide */
translate([0,s+introffset,0]) rotate([0,0,-90]) trusion(in=l_intrude);
/* right guide */
translate([size[0]+2*s,s+introffset,0]) rotate([0,0,90]) trusion(in=r_intrude);
}
/* vim:set ai sw=1: */
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