How to implement weapon accuracy?

[splash27]

In a shooter game I can calculate the vector with direction that player look at. This vector can be used to guide the bullet. But in this case the weapon will have 100% accuracy. I want to add a random angle (within limited range) to this vector to simulate accuracy less than 100%. So, the question is how to get rotated vector in 3D space?

[NasimiAsl]

 

hi use MAth : (Math.random()*1.-0.5)*0.1

https://www.babylonjs-playground.com/#2GXKNW#32

    var pos = camera.position;

    var tar = {
       x:camera.getTarget().x*1.+(Math.random()*1.-0.5)*0.1-pos.x,
       y:camera.getTarget().y*1.+(Math.random()*1.-0.5)*0.1-pos.y,
       z:camera.getTarget().z*1.-pos.z};

    var r = new BABYLON.Ray( pos,tar,1000.);

    var meshFound = scene.pickWithRay(r );