/* ****************************************************************
 *                            F.h
 * ****************************************************************
 * include file for the microfacet distribution functions
 */
#ifndef F_H
#define F_H

double  F_d_pl();
double  F_d_pp();
double  F_d_R();
double  F_c_pl();
double  F_c_pp();
double  F_c_R();
double  F_approx_n();
double  F_approx_k();
double  *F_approx_Fr();
double  *F_approx_Fr_Ft();

#endif F_H
/* ************************************************************* */