public void setOriginNormal(Vector3f origin, Vector3f normal) {
        this.normal.set(normal);
        this.constant = normal.x * origin.x + normal.y * origin.y + normal.z * origin.z;
    }
Initialize this plane using a point of origin and a normal.

@param origin the desired origin location (not null, unaffected)
@param normal the desired normal vector (not null, unaffected)
jme3-core/src/main/java/com/jme3/math/Plane.java