bar_width = 3;
bar_height = 20;

clamp_thick = 5;
clamp_l1 = 10;
clamp_l2 = 50;

strut_height = bar_height;

angle = 30; // fake value; TODO

clamp_width = 2 * clamp_thick + bar_width;
clamp_height = bar_height + clamp_thick;

module clamp() {
  l = clamp_l2 - clamp_l1;

  difference() {
    translate([clamp_l1, -clamp_width/2, 0])
    cube([l, clamp_width, clamp_height]);

    translate([0, -bar_width/2, clamp_thick + clamp_l2 * sin(angle)])
    rotate([0, angle, 0])
    cube([2*l, bar_width, 2*bar_height]);
 }
}

module con(num) {
  difference() {
    for (dist = [clamp_l1 + 2*clamp_thick, clamp_l2])
      assign(l = 2 * dist * sin(180/num) + 2*clamp_thick)
      for (i = [1:num])
        rotate(i*360/num)
        translate([dist, -clamp_thick, 0])
	rotate(180/num)
	translate([0, 0, 0])
        cube([clamp_thick, l, strut_height]);
    for (i = [1:num])
      rotate(i*360/num)
      translate([0, -clamp_width/2, 0])
      cube([2*clamp_l2, clamp_width, clamp_height]);
  }

  for (i = [1:num])
    rotate(i*360/num)
    clamp();
}

con(5);
//clamp();