@Override
    public void read(JmeImporter im) throws IOException {
        super.read(im);
        InputCapsule capsule = im.getCapsule(this);
        vector1 = (Vector3f) capsule.readSavable("simplexPoint1", null);
        vector2 = (Vector3f) capsule.readSavable("simplexPoint2", null);
        vector3 = (Vector3f) capsule.readSavable("simplexPoint3", null);
        vector4 = (Vector3f) capsule.readSavable("simplexPoint4", null);
        createShape();
    }
A simple point, line, triangle or quad collisionShape based on one to four points-
@author normenhansen
jme3-jbullet/src/main/java/com/jme3/bullet/collision/shapes/SimplexCollisionShape.java