RTS building snap to grid

Question

Hi I am trying to figure out how to get my building to snap to a grid when I move it around. Right now it follows my mouse position just fine, but I can't get it to snap. Please help!

     private Vector3 temp;
 
     // Update is called once per frame
     void Update () {
 
         
         temp.x = Mathf.Round(Input.mousePosition.x);
         temp.y = Mathf.Round(Input.mousePosition.y);
         temp.z = Camera.main.transform.position.y - 0.5f;
 
 
         transform.position = Camera.main.ScreenToWorldPoint(temp);

I just need the x and y to snap, the z position is just fine. Thanks! :)

Answer 1

Best Answer

Answer by jobo22 · Aug 02, 2017 at 06:49 PM

Finally got the snapping to work using this code

         Vector3 mousePos = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, Camera.main.transform.position.y));
         Vector3 finalPos = new Vector3(Mathf.Round(mousePos.x), Mathf.Round(mousePos.y), Mathf.Round(mousePos.z));
         transform.position = finalPos;

This is all in void Update()

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Answer 2

Answer by Bryckout · Aug 01, 2017 at 07:41 PM

Try this :

 Vector3 finalPos = Vector3.zero;
 void Update(){
      Vector3 cursorPos = Camera.main.ScreenToWorldPoint (Input.mousePosition);
      finalPos = new Vector3(Mathf.Round(cursorPos.x), Mathf.Round(cursorPos.y), [Z value here]);
 }

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jobo22 · Aug 01, 2017 at 08:13 PM 0

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It doesn't work. The cube wouldn't follow the mouse when I added transform.postion = finalPos, so I changed it to this

     private Vector3 finalPos = Vector3.zero;
     
     // Update is called once per frame
     void Update () {
         Vector3 cursorPos = Input.mousePosition;
         finalPos = new Vector3(Mathf.Round(cursorPos.x), Mathf.Round(cursorPos.y), Camera.main.transform.position.y - 0.5f);
         transform.position = Camera.main.ScreenToWorldPoint(finalPos);

But it still wont snap to the grid. :(

Bryckout jobo22 · Aug 01, 2017 at 08:31 PM 0

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It should work, it depends on your Camera settings.

jobo22 Bryckout · Aug 01, 2017 at 08:48 PM 0

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I just have a default camera with no settings changed except its rotation and position. I will hopefully figure it out. Thank you for helping! :)

RTS building snap to grid

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