dicetower/pinch.scad

module pinch(pinchRadius, circleRadius, centerWidth=0, round=false, center=true) {

    zero = 0.0001;
    height=circleRadius*2;
    width = max(zero, centerWidth);
    hull() {
        rotate([0,0,-90]) translate([0,0,center ? -circleRadius : 0]) {
            intersection() {
                translate([pinchRadius,0,circleRadius]) sphere(circleRadius);
                difference() {
                    cylinder(height, r=pinchRadius);
                    translate([0,0,-1]) cylinder(height + 2, r=pinchRadius - zero);
                }
            }
            translate([0,-.5*width,0]) cube([zero,1*width,height]);
        }
    }

}