I am currently am making a detail with blood where when the player shoots an enemy, a object spawns with a random sprite to represent blood. The problem is that the sprite simply only spawns in the same angle. I tried looking up how to get the angle of the bullet to give it to the newly spawned object. Does anyone here know how to get such a angle? so I could give it to another object? here are both scripts incase it helps
// Script for the gun
public Transform firepoint;
public GameObject bulletprefab;
public float bulletforce = 20f;
void Update()
{
if (Input.GetButtonDown("Fire1"))
{
Shoot();
}
}
void Shoot()
{
GameObject bullet= Instantiate(bulletprefab, firepoint.position, firepoint.rotation);
Rigidbody2D rby = bullet.GetComponent<Rigidbody2D>();
rby.AddForce(firepoint.up * bulletforce, ForceMode2D.Impulse);
SoundEffectScript.Playsound("gunshot");
}
// script for the blood object so far
private int rand;
public Sprite[] sprites;
void Start()
{
rand = Random.Range(0,sprites.Length);
GetComponent<SpriteRenderer>().sprite = sprites[rand];
}
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[![ hey guys so i need help please! i need my claw hand to be able to grab my object holder(orange thingy next to the red ball. my objectholder has a spring joint already so I want my clawhand to be able to grab it and pull it with the ball. When my hand opens then it shoots. But when I try to grab it, my hand goes right through.
My claw hand has rigidbody,box collider,configuration joint and is animation by this code
public class open2close : MonoBehaviour
{
public float speed;
private Animation anim;
Rigidbody rb;
void Start()
{
anim = gameObject.GetComponent<Animation>();
rb = GetComponent<Rigidbody>();
}
void Update()
{
//********************Open pincher ********************
if (Input.GetKey(KeyCode.X))
{
anim.Play("clawopen");
}
//*******************Close pincher ********************
if (Input.GetKey(KeyCode.Y))
{
anim.Play("clawclose");
}
}
}
as for my object holder it has box collider,spring joint, rigidbody, and rotation constraint. Can someone guide me or help me in what i can do thank you.
It is probably best to not have a collider on the claw hand. This is because you are mixing rigidbodies with animation, which can get messy. I would reccomend keeping everything, excpt for the box collider on the claw hand. Set it to a trigger. You can put booleans in the if statements to open and close the claw. This way, you can set the position of the objectholder to be at the claw (if they are touching).
Change your script to something like
public class open2close : MonoBehaviour
{
public float speed;
private Animation anim;
[SerializeField] bool isClosed;
Rigidbody rb;
void Start()
{
anim = gameObject.GetComponent<Animation>();
rb = GetComponent<Rigidbody>();
}
void Update()
{
if (Input.GetKey(KeyCode.X))
{
anim.Play("clawopen");
isClosed = false;
}
if (Input.GetKey(KeyCode.Y))
{
anim.Play("clawclose");
isClosed = true;
}
}
void OnTriggerStay(Collider obj)
{
Rigidbody colRb = obj.attachedRigidbody;
if (colRb != null && isClosed)
{
colRb.position = transform.position;
}
}
}
Let me know if this works and be specific! thanks :)
I'm trying to make a 3D Isometric game with a wizard shooting fireballs. I managed to make it shoot the fireball but they go in the direction which the wizard is facing: if I rotate the wizard the fireballs change direction. What can I do? Thanks for helping me.
This is the script I made (attached to the player):
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class WizardController : Characters
{
[SerializeField]
public Transform spawnMagic;
private GameObject magicShot;
public List<GameObject> magicBullets = new List<GameObject>();
private void Start()
{
maxHP = 150.0f;
magicShot = magicBullets[0];
}
void Update()
{
GetInputs();
Attack();
Defend();
cameraFollow();
}
private void FixedUpdate()
{
LookAt();
Move();
}
public override void Attack()
{
if (Input.GetButtonDown("Fire1"))
{
GameObject magicBullet;
isAttacking = true;
GetComponent<Animator>().SetBool("hit1", true);
if (spawnMagic != null)
{
magicBullet = Instantiate(magicShot, spawnMagic.transform.position, Quaternion.identity);
}
}
else
{
GetComponent<Animator>().SetBool("hit1", false);
}
}
}
The movement script for the bullet is a simple "transform.position" line:
transform.position += spawnMagic.forward * (speed * Time.deltaTime);
And this is what happen when the player shoot:
https://youtu.be/TYwWDr8W4Q4
To solve this problem, you must make the bullet movement independent of the any objects that are Child of wizard or depend on it transfrom.
If you are careful, the spawnMagic rotates as the wizard moves, and the bullet is referenced by spawnMagic.forward.
First you need to place bullet rotation same as spawn spawnMagic rotation during production.
magicBullet = Instantiate(magicShot, spawnMagic.transform.position, spawnMagic.transform.rotation)
Then replace spawnMagic.forward with local bullet forward at movement part, it will make bullet movement indepent of spawnMagic direction during move phase:
transform.position += transform.forward * (speed * Time.deltaTime)
I'm making a game in unity where the user drags to shoot a ball at some objects at a distance. So far I have this DragAndShoot script:
//using System.Collections;
//using System.Collections.Generic;
using UnityEngine;
[RequireComponent(typeof(Rigidbody))]
[RequireComponent(typeof(Collider))]
public class DragAndShoot : MonoBehaviour
{
public Transform prefab;
private Vector3 mousePressDownPos;
private Vector3 mouseReleasePos;
private Rigidbody rb;
private bool isShoot;
void Start()
{
rb = GetComponent<Rigidbody>();
}
private void OnMouseDown()
{
mousePressDownPos = Input.mousePosition;
}
private void OnMouseUp()
{
mouseReleasePos = Input.mousePosition;
Shoot(mouseReleasePos-mousePressDownPos);
}
private float forceMultiplier = 3;
void Shoot(Vector3 Force)
{
if(isShoot)
return;
rb.AddForce(new Vector3(Force.y,Force.x,Force.z) * forceMultiplier);
isShoot = true;
createBall();
}
void createBall(){
Instantiate(prefab, GameObject.Find("SpawnPoint").transform.position, Quaternion.identity);
}
}
As you can see, I made the function createBall() in order to respawn a ball prefab at the position of the game object SpawnPoint. When I run the game, the first ball shoots fine. And another ball respawns.
Issue: when I shoot the second ball and it moves, one more ball seems to have appeared at the second ball somehow, and it moves as well. Not sure why this is happening and how to fix it - can someone pls help? Thanks.
The problem is that you need to Destroy() the game object you threw first. Since you are just bringing the objects back when click down again, here is what you should do:
Make it so that it destroys the old object. Because you just keep instantiating the object, then when you throw it again it throws the old one too. If you understand what I mean, then hopefully, you can turn this into what you want. (It wasn’t exactly clear what your game was; this is what I interpreted)
I have a SMALL a problem. In Unity 3D 2020 Beta, I've put a player with a sphere collider on it and some cubes (walls) with box colliders. I've added a player controller script to the player object.
I've put the camera above the plane where the player and the walls are on, and I've made that the player should rotate to face the mouse position. I used rigidbody.AddForce for movement in a FixedUpdate function.
The player controller script is attached below:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerController : MonoBehaviour
{
[Header("Keys")]
public KeyCode forward;
public KeyCode backward;
public KeyCode left;
public KeyCode right;
public KeyCode fire;
[Header("Health")]
public int hitpoints = 3;
[Header("Movement")]
public float speed;
public float turningSpeed;
[Header("Shooting")]
public GameObject bulletPrefab;
public Transform bulletSpawner;
public float bulletSpeed;
public float reloadTime;
private float currentReload;
private Rigidbody rb;
private Quaternion targetRotation;
void Start()
{
rb = GetComponent<Rigidbody>();
currentReload = reloadTime;
}
void LateUpdate()
{
if (hitpoints == 0)
Die();
// Rotation
var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
RaycastHit hit;
if (Physics.Raycast(ray, out hit))
{
targetRotation = Quaternion.LookRotation(hit.point - transform.position);
Debug.DrawLine(transform.position, hit.point, Color.white);
}
transform.rotation = Quaternion.Slerp(transform.rotation, targetRotation, turningSpeed * Time.deltaTime);
transform.eulerAngles = new Vector3(0, transform.rotation.eulerAngles.y, 0);
currentReload += Time.deltaTime;
// Shooting
if (Input.GetKeyDown(fire) && currentReload >= reloadTime)
{
currentReload = 0f;
GameObject bulletGO = Instantiate(bulletPrefab, bulletSpawner.position, transform.rotation);
bulletGO.transform.position = bulletSpawner.position;
Bullet bulletScript = bulletGO.GetComponent<Bullet>();
bulletScript.speed = bulletSpeed;
Destroy(bulletGO, 5f);
}
}
void FixedUpdate()
{
// Movement
if (Input.GetKey(forward))
{
rb.AddForce(Vector3.forward * speed, ForceMode.Force);
}
if (Input.GetKey(backward))
{
rb.AddForce(-Vector3.forward * speed, ForceMode.Force);
}
if (Input.GetKey(left))
{
rb.AddForce(Vector3.left * speed, ForceMode.Force);
}
if (Input.GetKey(right))
{
rb.AddForce(Vector3.right * speed, ForceMode.Force);
}
//transform.position = new Vector3(transform.position.x, 10, transform.position.z);
// ON RIGIDBODY I HAVE CONSTRAINS:
// POSITION: Y (thats why I commented the line above)
// ROTATION: X, Z (topdown -> so I want only rotation on Y)
}
private void Die()
{
Destroy(gameObject);
}
}
But the problem is when the player hits very hard a wall, the sphere collider starts shaking and the player does not look at the mouse position exactly (it is somewhere 10 degrees away most of the times - it depends on how hard do I hit the walls).
I can record if it helps. If you want any information, feel free to ask! Any help will be appreciated! :)
The problem here seems to be you're directly altering the transform of your object despite having a Rigidbody component. Generally you should avoid altering a transform directly when you have a Rigidbody attached, especially a non-kinematic one, as by attaching one you are signalling that the object is to be controlled by the physics simulation.
Solutions I would explore:
If you don't need a rigidbody, don't use one
If you can avoid altering the transform directly, then do not do so. You can rotate objects by applying torque and the likes
Try setting your object to kinematic if you don't need collisions to affect the rigidbody's physics
Manually set the torque and velocity of your object to 0 each fixed update
I'm a Unity novice and I'm creating a small 2D shooting game on a school project and I already managed to have a functional shooting system in the main character that even bounces off some objects using Unity Physics.
I now wanted to integrate an aim line that will predict the trajectory of the bullet, including the bounces on objects (bubble-shooter style).
I found a script that uses Raycast and Line Renderer and it supposedly does this and I tried to integrate it into my gun script but although it does not give any error, it simply does not show anything when I test the game. I do not know if the problem is in the settings that I put in the Line Renderer Component or it is in the Script.
Could someone help me understand where my error is and point the right way?
My goal is:
My Line Renderer Component Definitions:
My Weapon Script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[RequireComponent(typeof(LineRenderer))]
public class Weapon : MonoBehaviour
{
[Range(1, 5)]
[SerializeField] private int _maxIterations = 3;
[SerializeField] private float _maxDistance = 10f;
public int _count;
public LineRenderer _line;
public Transform Firepoint;
public GameObject BulletPrefab;
public GameObject FirePrefab;
void Start()
{
_line = GetComponent<LineRenderer>();
}
// Update is called once per frame
void Update()
{
if (Input.GetButtonDown("Fire1"))
{
Shoot();
}
_count = 0;
_line.SetVertexCount(1);
_line.SetPosition(0, transform.position);
_line.enabled = RayCast(new Ray(transform.position, transform.forward));
}
void Shoot()
{
//shooting logic
var destroyBullet = Instantiate(BulletPrefab, Firepoint.position, Firepoint.rotation);
Destroy(destroyBullet, 10f);
var destroyFire = Instantiate(FirePrefab, Firepoint.position, Firepoint.rotation);
Destroy(destroyFire, 0.3f);
}
private bool RayCast(Ray ray)
{
RaycastHit hit;
if (Physics.Raycast(ray, out hit, _maxDistance) && _count <= _maxIterations - 1)
{
_count++;
var reflectAngle = Vector3.Reflect(ray.direction, hit.normal);
_line.SetVertexCount(_count + 1);
_line.SetPosition(_count, hit.point);
RayCast(new Ray(hit.point, reflectAngle));
return true;
}
_line.SetVertexCount(_count + 2);
_line.SetPosition(_count + 1, ray.GetPoint(_maxDistance));
return false;
}
}
Unity has two physics engines one for 2D and one for 3D. The script you provided relies on the 3D physics engine and won't work for 2D colliders. I edited your script to function with 2D colliders.
Either way make sure that all your game objects use the same physics system. Also the original script only shows the line renderer if it hits something. Best of luck!
using UnityEngine;
[RequireComponent(typeof(LineRenderer))]
public class Weapon : MonoBehaviour
{
[Range(1, 5)]
[SerializeField] private int _maxIterations = 3;
[SerializeField] private float _maxDistance = 10f;
public int _count;
public LineRenderer _line;
public Transform Firepoint;
public GameObject BulletPrefab;
public GameObject FirePrefab;
private void Start()
{
_line = GetComponent<LineRenderer>();
}
// Update is called once per frame
private void Update()
{
if (Input.GetButtonDown("Fire1"))
{
Shoot();
}
_count = 0;
_line.SetVertexCount(1);
_line.SetPosition(0, transform.position);
_line.enabled = true;
RayCast(transform.position, transform.up);
}
private void Shoot()
{
//shooting logic
var destroyBullet = Instantiate(BulletPrefab, Firepoint.position, Firepoint.rotation);
Destroy(destroyBullet, 10f);
var destroyFire = Instantiate(FirePrefab, Firepoint.position, Firepoint.rotation);
Destroy(destroyFire, 0.3f);
}
private bool RayCast(Vector2 position, Vector2 direction)
{
RaycastHit2D hit = Physics2D.Raycast(position, direction, _maxDistance);
if (hit && _count <= _maxIterations - 1)
{
_count++;
var reflectAngle = Vector2.Reflect(direction, hit.normal);
_line.SetVertexCount(_count + 1);
_line.SetPosition(_count, hit.point);
RayCast(hit.point + reflectAngle, reflectAngle);
return true;
}
if (hit == false)
{
_line.SetVertexCount(_count + 2);
_line.SetPosition(_count + 1, position + direction * _maxDistance);
}
return false;
}
}
Well, I changed on the physics material of the bullet, the Friction to 0 and Bounciness to 1. Also on the rigidbody2D the linear drag, angular drag and gravity scale all to 0. Although it is not a perfect rebound it was very close to what I intend for the game. Thank you! Check it out: Game Gif
Only negative thing is that my bullet is not turning in the direction of the movement after the rebound. I tried to use transform.LookAt but didn`t work. This is my bullet script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Bullet : MonoBehaviour
{
public float speed = 20f;
public Rigidbody2D myRigidbody;
// Start is called before the first frame update
void Start()
{
this.myRigidbody = this.GetComponent<Rigidbody2D>();
this.myRigidbody.velocity = transform.right * speed;
transform.LookAt(transform.position + this.myRigidbody.velocity);
}
}
But now i have this error: Error CS0034 Operator '+' is ambiguous on operands of type 'Vector3' and 'Vector2'