@Override
    public void write(JmeExporter ex) throws IOException {
        super.write(ex);
        OutputCapsule capsule = ex.getCapsule(this);
        capsule.write(vector1, "simplexPoint1", null);
        capsule.write(vector2, "simplexPoint2", null);
        capsule.write(vector3, "simplexPoint3", null);
        capsule.write(vector4, "simplexPoint4", null);
    }
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