Can i have help writing a script to pick up and throw a ball (2D game)

Question

there are 10 balls, and 3 players in play, and I am needing help fixing my script for one of the player objects to pick up and be able to throw a ball whenspace is pressed. I will put what I have so far, thank you for anyone who tries to help. Oh and this is a 2D game by the way.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class BallThrow : MonoBehaviour
 {
     private bool ballInHands = false;
     public float ballSpeed;
     private Rigidbody2D ballRB;
     public float offset;
 
 
     private void OnTriggerEnter2D(Collider2D other)
     {
         if (other.gameObject.tag == "Ball")
         {
             if (ballInHands == false)
             {
                 ballInHands = true;
                 other.gameObject.transform.position = transform.position + new Vector3(transform.position.x, transform.position.y + offset, transform.position.z);
                 if (Input.GetKeyDown("space"))
                 {
                     ballRB = other.GetComponent<Rigidbody2D>();
                     ballRB.AddForce(transform.up);
                     ballInHands = false;
                 }
             }
         }
     }
 }//end of class

Answer 1

Answer by Cuttlas-U · Oct 04, 2017 at 03:58 AM

hi;

i think u did a good job and u have some mistakes;

first of all pay attention to this code u wrote :

this has an if statement that is waiting for the player to press a button ; but this code is in trigger function and it will be checked just once , while u need to check every fram for player input;

so u can make a bool and put this in update function ; another change im doing is adding ,ForceMode2D.Impulse to your force code ; so check for what it does;

  private void OnTriggerEnter2D(Collider2D other)
      {
          if (other.gameObject.tag == "Ball")
          {
              if (ballInHands == false)
              {
                  ballInHands = true;
                  other.gameObject.transform.position = transform.position + new Vector3(transform.position.x, transform.position.y + offset, transform.position.z);
 
              }
          }
      }
 
 void Update()
 {
 if ( ballInHands  == true )
 {
                  if (Input.GetKeyDown("space"))
                  {
                      ballRB = other.GetComponent<Rigidbody2D>();
                      ballRB.AddForce(transform.up,ForceMode2D.Impulse);
                      ballInHands = false;
                  }
 }
 }

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FurleyFries · Oct 06, 2017 at 02:33 PM 0

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The script you posted just does what mine did, send the ball left and up about 1 meter. Then nothing else, the player can still move but the ball just stays there, But I did fix an error in the code you posted when you try to reference other.gameObject I update() its out of reference since the variable is a constructor for OnTriggerEnter, the way I fixed this is by assigning ballRB to other.gameObject in the OnTriggerEnter function. But I still cannot solve my other error. Thank you for helping me though!

Can i have help writing a script to pick up and throw a ball (2D game)

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