koobas.hobune.stream
How Can I Drag the Object With Touch ? (Mobile)
Hello,
I'm making a pong game for iPhone and I'm stuck at one point and in need of assistance! I want to drag the Player Object just by touching on IT, not anywhere else. I can move it by clicking anywhere on the screen, but that makes it impossible to implement 2-player game. I have 2 individual player sprites and I want them both can be controlled by dragging separately on the same scene.
Thank you!
Hi there, I made a game today myself using this script that is similar your pong game.
using UnityEngine;
using System.Collections;
//Class to control rackets via touch
public class TouchControl : MonoBehaviour
{
//Public Variables
public GameObject player1;
public GameObject player2;
//A modifier which affects the rackets speed
public float speed;
//Fraction defined by user that will limit the touch area
public int frac;
//Private Variables
private float fracScreenWidth;
private float widthMinusFrac;
private Vector2 touchCache;
private Vector3 player1Pos;
private Vector3 player2Pos;
private bool touched = false;
private int screenHeight;
private int screenWidth;
// Use this for initialization
void Start ()
{
//Cache called function variables
screenHeight = Screen.height;
screenWidth = Screen.width;
fracScreenWidth = screenWidth / frac;
widthMinusFrac = screenWidth - fracScreenWidth;
player1Pos = player1.transform.position;
player2Pos = player2.transform.position;
}
// Update is called once per frame
void Update ()
{
//If running game in editor
#if UNITY_EDITOR
//If mouse button 0 is down
if(Input.GetMouseButton(0))
{
//Cache mouse position
Vector2 mouseCache = Input.mousePosition;
//If mouse x position is less than or equal to a fraction of the screen width
if (mouseCache.x <= fracScreenWidth)
{
player1Pos = new Vector3(-7.5f, 0.5f, Mathf.Clamp(mouseCache.y / screenHeight * speed, 0, 8));
}
//If mouse x position is greater than or equal to a fraction of the screen width
if(mouseCache.x >= widthMinusFrac)
{
player2Pos = new Vector3(7.5f, 0.5f, Mathf.Clamp(mouseCache.y / screenHeight * speed, 0, 8));
}
//Set touched to true to allow transformation
touched = true;
}
#endif
//If a touch is detected
if (Input.touchCount >= 1)
{
//For each touch
foreach (Touch touch in Input.touches)
{
//Cache touch position
touchCache = touch.position;
//If touch x position is less than or equal to a fraction of the screen width
if (touchCache.x <= fracScreenWidth)
{
player1Pos = new Vector3(-7.5f, 0.5f, Mathf.Clamp(touchCache.y / screenHeight * 8, 0, 8));
}
//If mouse x position is greater than or equal to a fraction of the screen width
if(touchCache.x >= widthMinusFrac)
{
player2Pos = new Vector3(7.5f, 0.5f, Mathf.Clamp(touchCache.y / screenHeight * 8, 0, 8));
}
}
touched = true;
}
}
//FixedUpdate is called once per fixed time step
void FixedUpdate()
{
if (touched)
{
//Transform rackets
player1.transform.position = player1Pos;
player2.transform.position = player2Pos;
touched = false;
}
}
}
I'm currently using this script so I know it works. Let me know if you use it and run into issues
I get the point you want to make, but there is a little problem about it. I want to move the object, by only dragging the object itself, not a whole area. Is there any way to make this happen without splitting the screen or something ?
Thank you for your response!
I get the point you want to make, but there is a little problem about it. I want to move the object, by only dragging the object itself, not a whole area. Is there any way to make this happen without splitting the screen or something ?
Thank you for your response!
Sure I'll try again haha
This method requires you to set up a collider on your pong racket thingies :)
foreach(Touch touch in touches)
{
Ray ray = Camera.main.ScreenPointToRay(Input.touch.position);
RaycastHit hit;
if(Physics.Raycast(ray, out hit, 100))
{
//$$anonymous$$ight need to set X and Z depending on how your game is set up as touch.position is a 2D Vector
sprite.transform.position = touch.position;
}
}
What's happening here is that a Ray is cast from the camera whenever a touch is made, if the Ray collides with something within 100 units (Z units I believe) it will set the sprite position to that position.
You might want to do a check to make sure your ray collided with your pong sprite or something
When I use this code, it gives an error like this. " The name 'touches' does not exist in the current context.
EDIT: Btw here's a screenshot of my object's properties.
This should fix your error
if (Input.touchCount >= 1)
{
foreach(Touch touch in Input.touches)
{
Ray ray = Camera.main.ScreenPointToRay(touch.position);
RaycastHit hit;
if(Physics.Raycast(ray, out hit, 100))
}
}
Here is one solution that uses the OnMouse*() callbacks. It will work 'as is' for mobile, but it is not the most efficient method.
http://answers.unity3d.com/questions/566327/drag-object-relative-to-camera.html
There are lots of posts with drag and drop scripts. Most use Raycasting and the mouse. It is pretty straightforward to convert from mouse to touch. You will find a mouse solution here:
http://answers.unity3d.com/questions/498396/how-to-click-and-drag-an-object-at-full-speed.html
I've recently made a tutorial on touch and drag objects on my blog that may help you for your purpose. link - http://newtonians3d.blogspot.in/2014/06/a-simple-and-efficient-touch-and-drag.html I hope this was helpful.
@Exalia Hello .. I have some objects moving in a grid. I would be glad if you could help me how I need to write code to move these objects only left, right and forward on the phone.
