public boolean isOnPlane(Vector3f point) {
        float dist = pseudoDistance(point);
        if (dist < FastMath.FLT_EPSILON && dist > -FastMath.FLT_EPSILON) {
            return true;
        } else {
            return false;
        }
    }
<code>whichSide</code> returns the side at which a point lies on the
plane. The positive values returned are: NEGATIVE_SIDE, POSITIVE_SIDE and
NO_SIDE.

@param point
           the point to check.
@return the side at which the point lies.
jme3-core/src/main/java/com/jme3/math/Plane.java