public void setPlanePoints(Vector3f v1, Vector3f v2, Vector3f v3) {
        normal.set(v2).subtractLocal(v1);
        normal.crossLocal(v3.x - v1.x, v3.y - v1.y, v3.z - v1.z)
                .normalizeLocal();
        constant = normal.dot(v1);
    }
Initialize the Plane using the given 3 points as coplanar.

@param v1
           the first point
@param v2
           the second point
@param v3
           the third point
jme3-core/src/main/java/com/jme3/math/Plane.java