Resolved Making 2d player restricted to walking across certain gameobjects

This proved quite difficult for me, but I have made an attempt:

Code (CSharp):

1. public static string lastMove;
2.     public static bool grounded = true;
3.  
4.     void OnTriggerEnter2D(Collider2D col)
5.     {
6.         if(col.transform.name == "plat")
7.         {
8.             grounded = true;
9.         }
10.     }
11.  
12.     void OnTriggerExit2D(Collider2D col)
13.     {
14.         grounded = false;
15.         /*
16.         if (col.transform.name == "plat")
17.         {
18.             if (lastMove == "u")
19.             {
20.                 Move("d");
21.             }
22.             else if (lastMove == "d")
23.             {
24.                 Move("u");
25.             }
26.             else if (lastMove == "l")
27.             {
28.                 Move("r");
29.             }
30.             else if (lastMove == "r")
31.             {
32.                 Move("l");
33.             }
34.         }
35.         */
36.     }
37.  
38.     public static void Move(string dir)
39.     {
40.         lastMove = dir;
41.  
42.         if (dir == "u")
43.         {
44.             GameObject.Find("plr").transform.Translate(0, 1f, 0);
45.  
46.             if (!grounded)
47.             {
48.                 GameObject.Find("plr").transform.Translate(0, -1f, 0);
49.                 grounded = true;
50.             }
51.         }
52.         else if (dir == "d")
53.         {
54.             GameObject.Find("plr").transform.Translate(0, -1f, 0);
55.  
56.             if (!grounded)
57.             {
58.                 GameObject.Find("plr").transform.Translate(0, 1f, 0);
59.                 grounded = true;
60.             }
61.         }
62.         else if (dir == "l")
63.         {
64.             GameObject.Find("plr").transform.Translate(-1f, 0, 0);
65.  
66.             if (!grounded)
67.             {
68.                 GameObject.Find("plr").transform.Translate(1f, 0, 0);
69.                 grounded = true;
70.             }
71.         }
72.         else //r
73.         {
74.             GameObject.Find("plr").transform.Translate(1f, 0, 0);
75.  
76.             if (!grounded)
77.             {
78.                 GameObject.Find("plr").transform.Translate(-1f, 0, 0);
79.                 grounded = true;
80.             }
81.         }
82.     }

Moving works, but not the whole grounded thing.

So I want the yellow cube to be only allowed to walk on the platform, so when the player moves off, I move them back. But instead, it stops walking off once, then when you click again, you move off. I would love someone to either help fix this, or provide an easier way of doing this. Thank you!

 

Okay, I figures something out. First, I got the platform the player is on as a collider:

Code (CSharp):

1. void OnTriggerEnter2D(Collider2D col)
2.     {
3.         if(col.transform.CompareTag("blk"))
4.         {
5.             currentPlat = col;
6.         }
7.     }

Then everytime the player wanted to move, I asked if currentPlat (the currentPlatform) contained the players position + where they want to move, so:

Code (CSharp):

1. if (currentPlat.bounds.Contains(new Vector2(GameObject.Find("plr").transform.position.x, GameObject.Find("plr").transform.position.y + 1)))
2.             {
3.                 GameObject.Find("plr").transform.Translate(0, 1f, 0);
4.             }

 

I'm glad you got your situation solved, but just beware about the above code!

Remember the first rule of GameObject.Find():

Do not use GameObject.Find();

You have been warned.

More information: https://starmanta.gitbooks.io/unitytipsredux/content/first-question.html

 

Wow. Thank you so much; I just read the document. Very helpful. So basically, if I just assigned player to a public variable, instead of getting it every time, it would speed it up a lot? Strange, because I conditioned myself to avoid public variables, and try to get all variables needed, inside of the code. Thanks again!