lovejoy/lovejoy.scad

use <PolyGear/PolyGear.scad>
use <PolyGear/PolyGearBasics.scad>
use <PolyGear/shortcuts.scad>

render_fn = 180;
render_fa = .5;
render_fs = .2;

$fn= ($preview) ? 30 : render_fn;
$fa= ($preview) ? $fa : render_fa;
$fs= ($preview) ? $fs : render_fs;

module spider_section(ir=6,or=13, l=6, lt=1, h, die=false) {
	//a = 360/l;
	a = 360/l;
	cx=or-ir;
	if (die) {
		RiS(R=or+.01, r=0, h=h+.01, w1=0, w2=60);
		Ri(R=ir+.2, r=0, h=h+.01);
                spider_section(ir=ir,or=or,l=l,lt=lt+.2,h=h+.01,die=false);
	} else {
		for (r= [0,a])
		    rotate([0,0,r]) 
			translate([ir+lt/2,0,0])
                            cube([or-ir+lt, lt, h], center=true);
		Ri(R=ir, r=ir-lt, h=h);
	}
}

module spider(ir=6, sd=9, or=13, l=6, lt=1, h=3, die=false) {
	difference() {
		union() {
			for (i=[0 : 1 : l-1])
				if (i % 2) rotate([0,0,i*360/l]) spider_section(ir=ir,or=or,h=h,die=die);
		}
	}
}

module lovejoy(
    ph=5, // Plate Height
    r=13, // Diameter
    jh=3, // Jaw Height
    align = true,
    bc=undef, // base color
    cc=undef // cut color
) {
	//ir = ($children < 1) ? 4.2 : 0; 
        dz = align ? -ph : 0;
	translate([0,0,dz]) difference() {
                // Body
                assert($children<3, "Lovejoy only supports up to 2 children.");
                union() {
                    // Base Plate.
                    color(bc)
                        cylinder(r=r, h=ph+jh); //Ri(R=d,r=ir,h=ph+jh);
                    // Child 0 adds to base
                    if ($children > 0) children(0);
                }
                // Cuts
		translate([0,0,ph+jh/2])
                    color(cc) spider(ir=2, or=r, die=true, h=jh);
                // Center Cuts
		if ($children > 1) translate([0,0,-.01]) children(1);
	}
}

color("pink")
    lovejoy(r=4, ph=5, jh=3, align=false) {
                union();
                cylinder(h=8,d=4);
    }