Question Help building structures with cubes using code.

Hi. I am trying to do a small experiment in which I would like to build structures with simple cubes using code.

I found this code on GitHub, which makes some simple trees:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public static class Structure
6. {
7.     public static void MakeTree(Vector3 position, Queue<VoxelMod> queue, int minTrunkHeight, int maxTrunkHeight)
8.     {
9.         int height = (int)(maxTrunkHeight * Noise.Get2DPerlin(new Vector2(position.x, position.z), 250f, 3f));
10.  
11.         if (height < minTrunkHeight)
12.         {
13.             height = minTrunkHeight;
14.         }
15.  
16.         for (int i = 1; i < height; i++)
17.         {
18.             queue.Enqueue(new VoxelMod(new Vector3(position.x, position.y + i, position.z), 6));
19.         }
20.  
21.         //leaves
22.  
23.  
24.         for (int x = -2; x < 3; x++)
25.         {
26.             for (int z = -2; z < 3; z++)
27.             {
28.                 queue.Enqueue(new VoxelMod(new Vector3(position.x + x, position.y + height - 2, position.z + z), 11));
29.                 queue.Enqueue(new VoxelMod(new Vector3(position.x + x, position.y + height - 3, position.z + z), 11));
30.             }
31.         }
32.  
33.         for (int x = -1; x < 2; x++)
34.         {
35.             for (int z = -1; z < 2; z++)
36.             {
37.                 queue.Enqueue(new VoxelMod(new Vector3(position.x + x, position.y + height - 1, position.z + z), 11));
38.             }
39.         }
40.         for (int x = -1; x < 2; x++)
41.         {
42.             if (x == 0)
43.                 for (int z = -1; z < 2; z++)
44.                 {
45.                     queue.Enqueue(new VoxelMod(new Vector3(position.x + x, position.y + height, position.z + z), 11));
46.                 }
47.             else
48.                 queue.Enqueue(new VoxelMod(new Vector3(position.x + x, position.y + height, position.z), 11));
49.         }
50.  
51.     }
52. }
53.  

I have tested the whole project (which is on GitHub) and it works, but I can't understand how it works. If someone can explain it to me I would appreciate it a lot to be able to make my own structures.

 

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