include <convex_polygon.scad>;

CUTOUT_DEPTH = 10;

module cutout(h,d,c,k) {
    polygon([
        [h/-2-c-1,1],
        [h/2+c+1,1],
        [h/2-k,-c],
        [h/2-k,-d],
        [h/-2+k,-d],
        [h/-2+k,-c]
    ]);
    /*polygon([
        [h/-2+h*.15,0],
        [h/-2+h*.15,-2],
        [h/-2+k,-2],
        [h/-2+k,-d+1],
        [h/-2+k+1,-d],
        [h/2-k-1,-d],
        [h/2-k,-d+1],
        [h/2-k,-2],
        [h/2-h*.15,-2],
        [h/2-h*.15,0]
    ]);
    
    translate([h/-2-4,0,0]) polygon([
        [-.1,0],
        [-.1,-d],
        [.5,-d+1],
        [.5,0]
    ]);
    
    translate([h/2+4,0,0]) polygon([
        [-.5,0],
        [-.5,-d+1],
        [.1,-d],
        [.1,0]
    ]);
    
    translate([0,-d-2,0]) square([h-k,2-k],center=true);*/
}

module kit_connector(w,h,c,k,n) {
    difference() {
        convex_polygon(w,n);
        
        // Use pythagorian theorom to find the
        // distance between polygon points
        a = sqrt(
            pow(-w*sin(360/n),2) +
            pow(w-(w*cos(360/n)),2)
        );
        
        // Calculate the distance between the origin
        // and halfway between two points
        b = sqrt(pow(w,2) - pow(a/2,2));
        
        // Subtract the cutout from each side of the polygon
        for ( i = [1:n] ) {
            translate([b*sin(i*(360/n)),b*cos(i*(360/n))])
            rotate([0,0,i*(360/-n)])
                cutout(h,CUTOUT_DEPTH,c,k);
        }
    }
}

module kit_plate(d,xn,yn,c,k) {
    difference() {
        square([d[0],d[1]],center=true);
        for ( i = [1:yn] ) {
            translate([(d[0]/-2)+(i*(d[0]/(yn+1))),d[1]/2,0])
            cutout(d[2],CUTOUT_DEPTH,c,k);
            translate([(d[0]/-2)+(i*(d[0]/(yn+1))),d[1]/-2,0])
            rotate([0,0,180])
            cutout(d[2],CUTOUT_DEPTH,c,k);
        }
        for ( i = [1:xn] ) {
            translate([d[0]/-2,(d[1]/2)-(i*(d[1]/(xn+1))),0])
            rotate([0,0,90])
            cutout(d[2],CUTOUT_DEPTH,c,k);
            translate([d[0]/2,(d[1]/2)-(i*(d[1]/(xn+1))),0])
            rotate([0,0,-90])
            cutout(d[2],CUTOUT_DEPTH,c,k);
        }
    }
}