Modify AddExplosionForce and allow upwardsModifier to any direction instead

Questions & Answers
1

Is there any easy way to implement this or do we need to do it manually? Anyone happen to already know of some good implementation of this?

I want something like to this:

`function AddExplosionForceModifier (explosionForce : float, explosionPosition : Vector3, explosionRadius : float, explosionOriginPoint : Vector3 = new Vector3(0.0F,0.0F,0.0F), mode : ForceMode = ForceMode.Force) : void`

So I can point the explosionOriginPoint (rather than a directionModifier or upwardsModifier) to anywhere and not just up or down.

I'm using AddExplosionForce for wind emulation, and it works great to go up. But now I need new directions.

edit: I just noted this question could also be asked in another way which will hopefully facilitate me finding the answer on my own:

How is the code implementation on AddExplosionForce?

2

I think you must play around with the explosionPosition and with the explosionOriginPoint if it's part of the function, because if it's not I don't think that works.

3

Do a search for add.force and constant.force. I believe you can specify direction with those. You can also set them to be local to the object of local to the world.

4

Here, I just implemented it myself... Tho it's still far from perfect, it simulates the behavior I need for this moment.

Just create a `RigidbodyExtensions.cs` anywhere inside the unity project and add this:

using UnityEngine;
using System.Collections;

public static class RigidbodyExtensions : object {
    public static void AddExplosionForce (this Rigidbody body, float explosionForce, Vector3 explosionRadiusCenter, float explosionRadius) {
        AddExplosionForce(body, explosionForce, explosionRadiusCenter, explosionRadius, new Vector3(0F, 0F, 0F));
    }
    public static void AddExplosionForce (this Rigidbody body, float explosionForce, Vector3 explosionRadiusCenter, float explosionRadius, Vector3 explosionOriginPoint) {
        AddExplosionForce(body, explosionForce, explosionRadiusCenter, explosionRadius, explosionOriginPoint, ForceMode.Force);
    }
    public static void AddExplosionForce ( // still missing torque - try using "AddForceAtPosition" later on
        this Rigidbody body
        , float explosionForce
        , Vector3 explosionRadiusCenter
        , float explosionRadius
        , Vector3 explosionOriginPoint // this is the oposite from upwardsModifier
        , ForceMode mode
    ) {
        if (Vector3.Distance(body.transform.position, explosionRadiusCenter) <= explosionRadius) {
            Vector3 force = (body.transform.position - (explosionRadiusCenter + explosionOriginPoint));
            body.AddForce(force * (explosionForce/5), mode); // 5 came from experimentation
        }
    }
}

here's a comparison usage:

rigidbody.AddExplosionForce(2000F, transform.position, 2F, 3f); // unity's

rigidbody.AddExplosionForce(2000F, transform.position, 2F, -(new Vector3(0F, 3F, 0F))); // cawas

note the `**-**` sign. it's needed for similar behavior.