Knockback based on enemy position

Question

Hello guys, I was able to code a knockback based on the player movement, but I wanted one based on the enemy position.

Here is my current collision code on the object named "Cactus":

     private void OnTriggerStay(Collider other)
     {
         if (other.gameObject.tag == "Player" && theplayer.cantakedamage == true)
         {
             switch(gameObject.tag)
             {
                //if its a trigger 'Dano1', play script hurtplayer(damage1)
                 case "Dano1":
                 FindObjectOfType<HealthController>().HurtPlayer(damage1);
                 break;
             }
         }
     }

This code plays the script to damage calculation and plays the 'knockback' void on the player:

     public void HurtPlayer(int damage1)
         {
         currenthealth -= damage1;
         //plays the script 'knockback' on the player
         thePlayer.Knockback(new Vector3(0,0,0));
         }

This code now applies knockback code on the player based on its actual speed:

    public void Knockback(Vector3 direcaoknock)
    {    
          //direcao is the variable for movement on my character
          direcao += new Vector3(-direcao.x * knockbackforce, direcao.y + (knockbackforce * 10), -direcao.z * knockbackforce);
     }

I want to apply the knockback relative to the object named "Cactus".

Thanks!

Answer 1

Answer by parad0x · Jan 29 at 11:03 PM

You can use the normal of the other you got from OnTriggerStay i think.

 ContactPoint2D contact = other.GetContact(0);
 // Multiplying with -1 coz we need to apply force on the opposite direction of the normal
 Vector2 forceToBeApplied = new Vector2(knockBackXForce * contact.normal.x * -1, knockBackYForce * contact.normal.y * -1);
 targetBody.AddForce(forceToBeApplied, ForceMode2D.Impulse);

Not sure if the API for the GetContact is the same, but you get the idea

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Knockback based on enemy position

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