ShadowVolume vol = (ShadowVolume) volumes.get(v);
ShadowVolume vol = volumes.get(v);
    public ShadowVolume getShadowVolume(Light light) {        for (int v = 0, vSize = volumes.size(); v < vSize; v++) {            ShadowVolume vol = (ShadowVolume) volumes.get(v);            if (vol.light.equals(light))                return vol;        }        return null;    }