iTween, moving to a node on a path.

Question

I'm making a board game and I decided to try and use iTween for the pathing around the board. I have 42 tiles around my board, each with it's own node. I can get the gameObject to go completely around the path, but I'm lost at how to get it to only move to the node I need it to. I'm using a dice in the game to deiced how many spots the gameObject is to move if that makes a difference.

Would really appreciate any help, an example of a scenario would be if the game object was on node 3 and rolled a 6 it would go to node 9.

Note: I'm writing this in javascript.

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Best Answer

Answer by robertbu · Mar 19, 2013 at 03:20 AM

I should have read the question more carefully since you say "each with it's own node." Anyway, if you can move around the whole path, somewhere you have an array of either Vector3s or Transforms that you pass to iTween. Since you have a singe ordered path you can extract any part of it to build a list of Vector3s to pass to iTween. Note you should label your positions starting with 0. I'm using arv3AllPos as a list the list for the whole path. You array will have a different name. MakePath extracts any specified segment out of the total array to use as the path for a player move on the roll of the dice.

 var arv3AllPos : Vector3[];
 
 function MakePath(startNode : int, endNode : int) : Vector3[] {
 
     var v3New = new Vector3[endNode - startNode + 1];
     for (var i = startNode; i <= endNode; i++)
         v3New[i-startNode] = arv3AllPos[i];
         
     return v3New; 
 }

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Zip · Mar 19, 2013 at 10:58 AM 0

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This is just what I needed, I'll try it out when I get home but it looks perfect. I'll let you know if it worked soon. Thanks you.

Zip · Mar 19, 2013 at 04:05 PM 0

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I'm really close to getting it I just need a little more help with it. Right now as a test I'm using this as my code:

     var Pathcoords : Vector3[];
     Pathcoords[1]=Vector3(85.2, 7.41 ,117.4);
     Pathcoords[2]=Vector3(85.7, 7.41 ,121.8);
     Pathcoords[3]=Vector3(85.7, 7.41 ,126.0);
     Pathcoords[4]=Vector3(86.7, 7.41 ,130.8);
     Pathcoords[5]=Vector3(87.0, 7.41 ,134.8);
     Pathcoords[6]=Vector3(87.8, 7.41 ,138.7);
     
      
     function MakePath(startNode : int, endNode : int) : Vector3[] {
      
     var v3New = new Vector3[endNode - startNode + 1];
     
     for (var i = startNode; i <= endNode; i++)
     v3New[i-startNode] = Pathcoords[i];
    
 
      
     return v3New;
 
     }
     
     
     
     
 function Start () {
    var v3path:Vector3[] = MakePath(1,3);
     iTween.MoveTo(gameObject,v3path[0],1);
     iTween.MoveTo(gameObject,v3path[1],1);
     iTween.MoveTo(gameObject,v3path[2],1);
 
 
 
 }

When running this code I get two IndexOutOfRangeException: Array index is out of range errors. I feel like I should be defining the size of the arrays but can't figure out how for some reason.

here's the exact errors I get:

IndexOutOfRangeException: Array index is out of range. player1.MakePath (Int32 startNode, Int32 endNode) (at Assets/Scripts/player1.js:20) player1.Start () (at Assets/Scripts/player1.js:32)

and

IndexOutOfRangeException: Array index is out of range. player1.Main () (at Assets/Scripts/player1.js:7)

I know this is a really simple problem but I'm new to javascript and just can't see what's wrong. Thanks you for your help.

robertbu · Mar 19, 2013 at 04:34 PM 0

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You need to create the memory for the array, not just declare the variable. For example:

 var Pathcoords : Vector3[] = new Vector3[50];

You an also modify it in the Inspector instead. If you click on the object this script is attached to, in the Inspector you will see a triangle next to Pathcoords. You can click on the triangle to open it up. Set it size, and then you can enter the values in the inspector. If you don't want to use the inspector, I recommend making the variable private:

 private var Pathcoords : Vector3[] = new Vector3[50];

Zip · Mar 19, 2013 at 04:41 PM 0

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Excellent, everything is working the way I want it to. You have my thanks. I really appreciate all the help.

iTween, moving to a node on a path.

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