setNeedsRefresh(true);
    public void setParameter(float[] param, int paramID) {        if (paramID < 0 || paramID > 95)                throw new IllegalArgumentException("Invalid parameter ID");        if (param != null && param.length != 4)                throw new IllegalArgumentException("Vertex program parameters must be of type float[4]");        usingParameters = true;        parameters[paramID] = param;    }