public float[] getColorArray(float[] store) {
        store[0] = r;
        store[1] = g;
        store[2] = b;
        store[3] = a;
        return store;
    }
Stores the current r,g,b,a values into the given array.  The given array must have a
length of 4 or greater, or an array index out of bounds exception will be thrown.

@param store The <code>float</code> array to store the values into.
@return The <code>float</code> array after storage.
jme3-core/src/main/java/com/jme3/math/ColorRGBA.java