engine/src/bullet-common/com/jme3/bullet/collision/PhysicsCollisionGroupListener.java

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package com.jme3.bullet.collision;

/**
 *
 * @author normenhansen
 */
public interface PhysicsCollisionGroupListener {

    /**
     * Called when two physics objects of the registered group are about to collide, <i>called from physics thread</i>.<br>
     * This is only called when the collision will happen based on the collisionGroup and collideWithGroups
     * settings in the PhysicsCollisionObject. That is the case when <b>one</b> of the partys has the
     * collisionGroup of the other in its collideWithGroups set.<br>
     * @param nodeA CollisionObject #1
     * @param nodeB CollisionObject #2
     * @return true if the collision should happen, false otherwise
     */
    public boolean collide(PhysicsCollisionObject nodeA, PhysicsCollisionObject nodeB);

}