Adding extra functionality to a simple Tetris game

Hi there all,

I've been playing with Unity recently - and I've just followed this tutorial on how to make a Tetris clone - and it all went really well - I'm going to fiddle around with it and add some more functionality to it learn a little more about developing in Unity

What I'd like to do is -

• When a Tetris piece has been placed (as in, it can't go down any more and its position is locked)
  • I'd like to change it's color and the layer it is on
  • I'm pretty sure I can get the exact gameObject I want with - this.gameObject (as it is being placed)
  • I don't know however where exactly the game is registering the piece as 'placed', whether it's on the grid, or the piece

What is below is the 'abridged' version of the code, as I don't think that all of it will be relevant/important - and it's kinda gross to read a code dump anyways Pastebin to the full code - just incase

Thanks
Ollie

P.S. - Sorry if this is in the wrong place, I think the forums have changed since the last time I posted anything

Grid.cs (Global)​

Code (CSharp):

1.  
2. ...
3. public class Grid : MonoBehaviour {
4.     // The Grid itself
5.     public static int w = 10;
6.     public static int h = 20;
7.     public static Transform[,] grid = new Transform[w, h];
8.  
9.     public static Vector2 roundVec2(Vector2 v) {
10.         return new Vector2(Mathf.Round(v.x),
11.                            Mathf.Round(v.y));
12.     }
13.  
14.     public static bool insideBorder(Vector2 pos) {
15.         return ((int)pos.x >= 0 &&
16.                 (int)pos.x < w &&
17.                 (int)pos.y >= 0);
18.     }
19.    
20.     ...
21. }
22.  

Group.cs (Attached to each Tetrinemo)​

Code (CSharp):

1.  
2. ...
3. [FONT=Courier New]public class Group : MonoBehaviour {
4.     // Time since last gravity tick
5.     float lastFall = 0;
6.  
7.     void Start() {
8.         // Default position not valid? Then it's game over
9.         if (!isValidGridPos()) {
10.             Debug.Log("GAME OVER");
11.             Destroy(gameObject);
12.         }
13.     }
14.  
15.     void Update() {
16.         // Move Left
17.         if (Input.GetKeyDown(KeyCode.LeftArrow)) {
18.             // Modify position
19.             transform.position += new Vector3(-1, 0, 0);
20.  
21.             // See if valid
22.             if (isValidGridPos())
23.                 // It's valid. Update grid.
24.                 updateGrid();
25.             else
26.                 // It's not valid. revert.
27.                 transform.position += new Vector3(1, 0, 0);
28.         }
29.  
30.         // Move Right
31.         else if (Input.GetKeyDown(KeyCode.RightArrow)) {
32.             // Modify position
33.             transform.position += new Vector3(1, 0, 0);
34.  
35.             // See if valid
36.             if (isValidGridPos())
37.                 // It's valid. Update grid.
38.                 updateGrid();
39.             else
40.                 // It's not valid. revert.
41.                 transform.position += new Vector3(-1, 0, 0);
42.         }
43.  
44.         // Rotate
45.         else if (Input.GetKeyDown(KeyCode.UpArrow)) {
46.             transform.Rotate(0, 0, -90);
47.  
48.             // See if valid
49.             if (isValidGridPos())
50.                 // It's valid. Update grid.
51.                 updateGrid();
52.             else
53.                 // It's not valid. revert.
54.                 transform.Rotate(0, 0, 90);
55.         }
56.  
57.         // Move Downwards and Fall
58.         else if (Input.GetKeyDown(KeyCode.DownArrow) ||
59.                  Time.time - lastFall >= 1) {
60.             // Modify position
61.             transform.position += new Vector3(0, -1, 0);
62.  
63.             // See if valid
64.             if (isValidGridPos()) {
65.                 // It's valid. Update grid.
66.                 updateGrid();
67.             } else {
68.                 // It's not valid. revert.
69.                 transform.position += new Vector3(0, 1, 0);
70.  
71.                 // Clear filled horizontal lines
72.                 Grid.deleteFullRows();
73.  
74.                 // Spawn next Group
75.                 FindObjectOfType<Spawner>().spawnNext();
76.  
77.                 // Disable script
78.                 enabled = false;
79.             }
80.  
81.             lastFall = Time.time;
82.         }
83.     }
84.  
85.     bool isValidGridPos() {
86.         foreach (Transform child in transform) {
87.             Vector2 v = Grid.roundVec2(child.position);
88.  
89.             // Not inside Border?
90.             if (!Grid.insideBorder(v))
91.                 return false;
92.  
93.             // Block in grid cell (and not part of same group)?
94.             if (Grid.grid[(int)v.x, (int)v.y] != null &&
95.                 Grid.grid[(int)v.x, (int)v.y].parent != transform)
96.                 return false;
97.         }
98.         return true;
99.     }
100.  
101.     void updateGrid() {
102.         // Remove old children from grid
103.         for (int y = 0; y < Grid.h; ++y)
104.             for (int x = 0; x < Grid.w; ++x)
105.                 if (Grid.grid[x, y] != null)
106.                     if (Grid.grid[x, y].parent == transform)
107.                         Grid.grid[x, y] = null;
108.  
109.         // Add new children to grid
110.         foreach (Transform child in transform) {
111.             Vector2 v = Grid.roundVec2(child.position);
112.             Grid.grid[(int)v.x, (int)v.y] = child;
113.         }
114.     }
115. }
116.  

 

You should at least format the post better with code tags and tab/space indents

Code (CSharp):

1. [code=CSharp]
2. This is C# code.
3.  

[/code]

 

Sorry - will do, as I said, I haven't posted here in its current incarnation
Thanks!

 

• I'd like to change it's color and the layer it is on

From just code i can't tell how your objects are colored, that comes from the components you use on objects. If i assume you have SpriteRenderer, then you can

Code (CSharp):

1. grid[x, y].GetComponent<SpriteRenderer>().color = new Color(1, 0, 0); // Change to red

• I don't know however where exactly the game is registering the piece as 'placed', whether it's on the grid, or the piece

Code (CSharp):

1. if (grid[x, y]) // <- piece is not null in that position so it is placed

 

Sorted it out Line 73 in Group.cs is the area where any code should be added that interferes with the placed Tetrinemo
Thanks for your help all