How to Reflect a Game Object on Collision: Great Help For Beginners

Step 1 How to use

- Take some wall sprites and place it at the top, bottom, left and right sides.
- Now, add BoxCollider2D and RigidBody2D on all the walls as shown in the figure.
- Next, set some mass of the wall and set Gravity Scale to 0(Zero) and isKinemetic to true.
- Assign ‘Wall’ tag to each wall. 

- Now, Take One Bullet Sprite.
- Add RigidBody2d and CircleCollider2D to the bullet as shown in the figure. 

• NOTE: Set Circle Collider to the point of the bullet and make sure it is small.

- Set GravityScale to 0(Zero) and FixedAngle to true in the Rigidbody2D.
- Now, add Bullet Script to the Bullet.

Step 2 Code Sample

usingUnityEngine;
usingSystem.Collections;
 
publicclassBullet : MonoBehaviour
{
 
    #region PUBLIC-PROPERTIES
publicfloatbulletSpeed;
    #endregion
 
    #region PRIVATE-PROPERTIES
    #endregion
 
    #region UNITY-CALLBACKS
voidOnEnable()
    {
        rigidbody2D.velocity = transform.right * bulletSpeed;
    }
void OnCollisionEnter2D(Collision2D other)
    {
if (other.transform.CompareTag("Wall"))
CollisionWithWall(other);
    }
    #endregion
 
    #region PRIVATE-MEHODS
voidCollisionWithWall(Collision2D other)
    {
//For Reflecting The Bullet
Vector3reflectedPosition = Vector3.Reflect(transform.right,other.contacts[0].normal);
        rigidbody2D.velocity = (reflectedPosition).normalized * bulletSpeed;
 
//For Rotate The Bullet Towards its velocity
Vector3dir = rigidbody2D.velocity;
float angle = Mathf.Atan2(dir.y, dir.x) * Mathf.Rad2Deg;
rigidbody2D.MoveRotation(angle);
    }
    #endregion
}

I hope you find this blog post very helpful while working on reflect object in Unity 2D. Let me know in comment if you have any questions regarding unity. I will reply you ASAP.

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Mehul Rughani

I am professional Android App & Game developer. I love to develop unique and creative Games & Apps. I am very passionate about my work.