strap.scad

$fn = 60;

node_radius                 = 3;
node_bar_height             = 16;
nodes                       = [40, 50];
node_height                 = 3;

bend_padding                = 4;
bend_height                 = 1.5;
bend_angle                  = -5;

leaf_width                  = 30;
leaf_heigth                 = 20;
leaf_border                 = 10;
leaf_outher_corner_radius   = 5;
leaf_inner_corner_radius    = 2;
leaf_height                 = 1.5;

module node(x) {
    translate([node_radius,0,0])
    {
        translate ([-x ,node_bar_height/2])
            circle(node_radius);
        translate ([-x,-node_bar_height/2])
            circle(node_radius);
        translate ([-x -node_radius,-node_bar_height/2])
            square([node_radius*1.5,node_bar_height]);
    }
}

module bend()
{
    bend_bar_height = node_bar_height - (bend_padding / 2) - (node_radius * 2);
    hull() {
        translate(-[nodes[len(nodes)-1], bend_bar_height/2])
            square([1, bend_bar_height]);
        
        translate([0 - leaf_width/2, -bend_bar_height/2])
            square([1, bend_bar_height]);
    }
}

module leaf_base(x, y, r) {
    translate([-x/2, -y/2])
    hull() {
        translate([r, r])
            circle(r);
        
        translate([r, y - r])
            circle(r);
        
        translate([x - r, r])
            circle(r);
        
        translate([x - r, y - r])
            circle(r);
    }
}

module leaf() {
    difference() {
        leaf_base(leaf_width, leaf_heigth, leaf_outher_corner_radius);
        leaf_base(leaf_width - leaf_border, leaf_heigth - leaf_border, leaf_inner_corner_radius);
    }
}

module bend_and_nodes() {
    rotate(bend_angle, 0, 0) {
        linear_extrude(height = node_height) {
            for(x = nodes) {
                node(x, node_radius);
            }
        }
        
        linear_extrude(height= bend_height) {
            bend();
        }
    }
}

bend_and_nodes();

mirror()
    bend_and_nodes();

linear_extrude(height = leaf_height)
    leaf();