/*---------------------------------------------------------------------
 *
 * Copyright (c) 1988 Pixar.   All rights reserved.   This data file and
 * the model it represents contains  proprietary confidential information
 * and trade secrets of Pixar.  Reverse engineering of binary code
 * is prohibited.   Use of copyright  notice is precautionary  and
 * does not imply publication.
 *
 *                    RESTRICTED RIGHTS NOTICE
 *
 * Use,  duplication,  or disclosure by the Government is subject to
 * restrictions as set forth in subdivision (b)(3)(ii) of the Rights
 * in Technical Data and Computer Software clause at 252.227-7013.
 *
 * Pixar
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 * San Rafael, CA  94901
 *
 *--------------------------------------------------------------------*/

surface
metal (float Ka=1, Ks=1, roughness=.1)
{
    point Nf, V;

    Nf = faceforward(normalize(N), I) ;
    V = normalize(-I) ;

    Oi = Os;
    Ci = Os * Cs * ( Ka*ambient() + Ks*specular(Nf,V,roughness) );
}