Add 2021-22 in... OpenSCAD and Blender?!

challenges/2021/22-reactorReboot/README.md

@@ -1,2 +1,16 @@
 # [Day 22: Reactor Reboot](https://adventofcode.com/2021/day/22)
 
+Today's solution is a little weird...
+
+I solved part one using the easy, store every point method. However, for part two, I didn't want to go to the trouble of writing code to work out the intersections of all the cubes. Instead, I chose to do the following:
+
+* Wrote some Python code (`openscad-generate.py`) to generate some [OpenSCAD](http://openscad.org/) code based on the challenge input
+    * This made liberal use of nested `union()`, `difference()`, `translate()` and `cube()` functions
+* Ran this code in OpenSCAD and exported the resultant model as an STL
+* Imported this STL file into Blender and used the 3D-Print Toolbox addon to calculate the total volume of the object
+* Typed this number into the AoC website
+* Obtained the 2nd star ★ :D
+
+![openscad](openscad-part-2.png)
+
+![blender](blender-part-2.png)

challenges/2021/22-reactorReboot/part.1.scad

@@ -0,0 +1,98 @@
+union() {
+difference() {
+union() {
+difference() {
+union() {
+difference() {
+union() {
+difference() {
+union() {
+difference() {
+union() {
+union() {
+union() {
+union() {
+union() {
+union() {
+union() {
+union() {
+union() {
+translate([-40, -3, -48]) {
+cube([48, 53, 55], center=false);
+};
+translate([-38, -11, -30]) {
+cube([49, 49, 50], center=false);
+};
+};
+translate([-43, -16, -38]) {
+cube([45, 47, 52], center=false);
+};
+};
+translate([-10, -8, -41]) {
+cube([55, 55, 46], center=false);
+};
+};
+translate([-27, -2, -33]) {
+cube([47, 48, 46], center=false);
+};
+};
+translate([-41, -18, -34]) {
+cube([46, 51, 54], center=false);
+};
+};
+translate([-43, -20, -34]) {
+cube([53, 48, 55], center=false);
+};
+};
+translate([-47, -5, -20]) {
+cube([46, 55, 53], center=false);
+};
+};
+translate([-20, -40, -16]) {
+cube([54, 47, 50], center=false);
+};
+};
+translate([-25, -47, -46]) {
+cube([50, 46, 53], center=false);
+};
+};
+translate([-28, -6, 22]) {
+cube([20, 11, 16], center=false);
+};
+};
+translate([-34, -16, -43]) {
+cube([49, 49, 47], center=false);
+};
+};
+translate([-36, -44, 5]) {
+cube([19, 12, 12], center=false);
+};
+};
+translate([-23, -34, -38]) {
+cube([46, 46, 51], center=false);
+};
+};
+translate([-24, 26, -18]) {
+cube([10, 14, 10], center=false);
+};
+};
+translate([-23, -31, -38]) {
+cube([46, 52, 52], center=false);
+};
+};
+translate([-16, 7, -44]) {
+cube([11, 13, 15], center=false);
+};
+};
+translate([-8, -18, -27]) {
+cube([54, 47, 46], center=false);
+};
+};
+translate([-24, -3, 33]) {
+cube([17, 11, 13], center=false);
+};
+};
+translate([-28, -15, -18]) {
+cube([47, 55, 54], center=false);
+};
+};

challenges/2021/README.md

@@ -33,7 +33,7 @@ Solutions to the [2021 Advent of Code](https://adventofcode.com/2021).
 | 19 - Beacon Scanner                 | Unattempted        |                                                                                                         |                                                                                                                                                         |
 | 20 - Trench Map \*                  | ★ ★                | [Python](20-trenchMap/py), [Nim](20-trenchMap/nim)                                                      | Took a moment to realise that the infinite grid alternates between lit and unlit, and even then I had to look at someone else's solution to realise it. |
 | 21 - Dirac Dice                     | ★ ☆                | [Python](21-diracDice/py)                                                                               | Couldn't be bothered with part two - I've got too much going on at the moment to spend a lot of time thinking about it.                                 |
-| 22 - Reactor Reboot                 | ★ ☆                | [Python](22-reactorReboot/py)                                                                           | Once again - couldn't be bothered with part two.                                                                                                        |
+| 22 - Reactor Reboot                 | ★ ★                | [Python, OpenSCAD and Blender](22-reactorReboot/)                                                       | I did not expect to end up using 3D CAD software to complete AoC...                                                                                     |
 
 <!-- PARSE END -->