/* GNU AGPLv3 (or later at your option)
   see bottom for more license info */

/* measurements from misumi's 3030 aluminum extrusion data sheet
   https://us.misumi-ec.com/pdf/fa/2012/p2_0545.pdf
*/

x = 30;
y = 30;
diagonal = sqrt(pow(30/2, 2) + pow(30/2, 2));
opening_width = 8;
opening_depth = 9;
slot_major_width = 16.5;
inner_block = 12;
inner_hole = 6.8 / 2;

major_block_corner_diameter = 4;
major_block_corner_radius = major_block_corner_diameter / 2;
major_block = 30 - major_block_corner_diameter;

corner_block_inner = (30 - 16.5) / 2;
wall = 2;

$fn = 40;

intersection(){
  minkowski() {
    square(x - major_block_corner_diameter, center=true);
    circle(major_block_corner_radius); }

  union(){
    square(inner_block / 2);
    rotate(45) translate([diagonal/2, 0]) square([diagonal, wall], center=true);
    translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
      square([corner_block_inner, corner_block_inner]); }
    translate([opening_width / 2, y/2 - wall]) {
      square([(x - opening_width) / 2, wall]); }

    mirror([1, -1]) {
      square(inner_block / 2);
      rotate(45) {
        translate([diagonal/2, 0]) {
          square([diagonal, wall], center=true); } }
      translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
        square([corner_block_inner, corner_block_inner]); }
      translate([opening_width / 2, y/2 - wall]) {
        square([(x - opening_width) / 2, wall]); } }

    rotate(90){
      square(inner_block / 2);
      rotate(45) {
        translate([diagonal/2, 0]) {
          square([diagonal, wall], center=true); } }
      translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
        square([corner_block_inner, corner_block_inner]); }
      translate([opening_width / 2, y/2 - wall]) {
        square([(x - opening_width) / 2, wall]); }

      mirror([1, -1]) {
        square(inner_block / 2);
        rotate(45) {
          translate([diagonal/2, 0]) {
            square([diagonal, wall], center=true); } }
        translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
          square([corner_block_inner, corner_block_inner]); }
        translate([opening_width / 2, y/2 - wall]) {
          square([(x - opening_width) / 2, wall]); } } }

    rotate(180){
      square(inner_block / 2);
      rotate(45) {
        translate([diagonal/2, 0]) {
          square([diagonal, wall], center=true); } }
      translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
        square([corner_block_inner, corner_block_inner]); }
      translate([opening_width / 2, y/2 - wall]) {
        square([(x - opening_width) / 2, wall]); }

      mirror([1, -1]) {
        square(inner_block / 2);
        rotate(45) {
          translate([diagonal/2, 0]) {
            square([diagonal, wall], center=true); } }
        translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
          square([corner_block_inner, corner_block_inner]); }
        translate([opening_width / 2, y/2 - wall]) {
          square([(x - opening_width) / 2, wall]); } } }

    rotate(270){
      square(inner_block / 2);
      rotate(45) {
        translate([diagonal/2, 0]) {
          square([diagonal, wall], center=true); } }
      translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
        square([corner_block_inner, corner_block_inner]); }
      translate([opening_width / 2, y/2 - wall]) {
        square([(x - opening_width) / 2, wall]); }

      mirror([1, -1]) {
        square(inner_block / 2);
        rotate(45) {
          translate([diagonal/2, 0]) {
            square([diagonal, wall], center=true); } }
        translate([x / 2-corner_block_inner, y / 2 - corner_block_inner]) {
          square([corner_block_inner, corner_block_inner]); }
        translate([opening_width / 2, y/2 - wall]) {
          square([(x - opening_width) / 2, wall]); } } } } }

/*
  This file is part of 3d-printables.

  3d-printables is free software: you can redistribute it and/or modify
  it under the terms of the GNU Affero General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  3d-printables is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License
  along with challenge-bot.  If not, see <http://www.gnu.org/licenses/>.
*/