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/* Copyright (c) 1993 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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|
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/* Ce programme calcule les directions et les energies des rayons lumineux |
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resultant du passage d'un rayon au travers d'un vitrage prismatique |
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|
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1991, LESO - EPFL, R. Compagnon - F. Di Pasquale */ |
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|
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#include "standard.h" |
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|
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#ifdef NOSTRUCTASSIGN |
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static double err = "No structure assignment!"; /* generate compiler error */ |
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#endif |
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|
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|
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static double |
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Sqrt(x) |
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double x; |
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{ |
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if (x < 0.) |
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return(0.); |
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return(sqrt(x)); |
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} |
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#define sqrt(x) Sqrt(x) |
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|
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/* definitions de macros utiles */ |
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|
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#define ALPHA 0 |
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#define BETA 1 |
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#define GAMMA 2 |
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#define DELTA 3 |
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#define AUCUNE 4 |
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#define X(r) r.v[0] |
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#define Y(r) r.v[1] |
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#define Z(r) r.v[2] |
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#define XX(v) v[0] |
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#define YY(v) v[1] |
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#define ZZ(v) v[2] |
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#define alpha_beta(v_alpha,v_beta) tfm(matbt,v_alpha,v_beta) |
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#define beta_alpha(v_beta,v_alpha) tfm(matb,v_beta,v_alpha) |
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#define alpha_gamma(v_alpha,v_gamma) tfm(matct,v_alpha,v_gamma) |
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#define gamma_alpha(v_gamma,v_alpha) tfm(matc,v_gamma,v_alpha) |
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#define prob_alpha_gamma(r) (1.-prob_alpha_beta(r)) |
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#define prob_beta_gamma(r) (1.-prob_beta_alpha(r)) |
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#define prob_gamma_beta(r) (1.-prob_gamma_alpha(r)) |
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#define prob_delta_gamma(r) (1.-prob_delta_beta(r)) |
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#define prob_beta_delta(r) (prob_beta_alpha(r)) |
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#define prob_gamma_delta(r) (prob_gamma_alpha(r)) |
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#define prob_delta_beta(r) (prob_alpha_beta(r)) |
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|
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|
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/* Definitions des types de donnees */ |
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|
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typedef struct { FVECT v; /* direction */ |
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double ppar1,pper1, |
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ppar2,pper2; /* polarisations */ |
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double e; /* energie */ |
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double n; /* milieu dans lequel on se propage */ |
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int orig,dest; /* origine et destination */ |
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} TRAYON; |
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|
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typedef struct { double a,b,c,d; /* longueurs caracteristiques */ |
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double np; /* indice de refraction */ |
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} TPRISM; |
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|
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|
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/* Definitions des variables globales */ |
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|
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static TPRISM prism; /* le prisme ! */ |
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static MAT4 matb = MAT4IDENT; /* matrices de changement de bases */ |
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static MAT4 matbt = MAT4IDENT; |
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static MAT4 matc = MAT4IDENT; |
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static MAT4 matct = MAT4IDENT; |
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static double seuil; /* seuil pour l'arret du trace */ |
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static double sinus,cosinus; /* sin et cos */ |
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static double rapport; /* rapport entre les indices des |
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milieux refracteur et incident */ |
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static int tot_ref; /* flag pour les surfaces |
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reflechissantes */ |
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static double fact_ref[4]={1.0,1.0,1.0,1.0}; /* facteurs de reflexion */ |
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static double tolerance; /* degre de tol. pour les amalgames */ |
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static double tolsource; /* degre de tol. pour les sources */ |
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static double Nx; |
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static int bidon; |
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#define BADVAL (-10) |
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static long prismclock = -1; |
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static int nosource; /* indique que l'on ne trace pas |
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en direction d'une source */ |
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static int sens; /* indique le sens de prop. du ray.*/ |
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static int nbrayons; /* indice des rayons sortants */ |
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static TRAYON *ray; /* tableau des rayons sortants */ |
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static TRAYON *raytemp; /* variable temporaire */ |
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static TRAYON rtemp; /* variable temporaire */ |
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|
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extern double argument(); |
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extern double varvalue(); |
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extern double funvalue(); |
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extern long eclock; |
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|
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|
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/* Definition des routines */ |
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|
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#define term(a,b) a/sqrt(a*a+b*b) |
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static |
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prepare_matrices() |
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{ |
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/* preparation des matrices de changement de bases */ |
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|
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matb[0][0] = matbt[0][0] = matb[1][1] = matbt[1][1] = term(prism.a,prism.d); |
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matb[1][0] = matbt[0][1] = term(-prism.d,prism.a); |
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matb[0][1] = matbt[1][0] = term(prism.d,prism.a); |
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matc[0][0] = matct[0][0] = matc[1][1] = matct[1][1] = term(prism.b,prism.d); |
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matc[1][0] = matct[0][1] = term(prism.d,prism.b); |
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matc[0][1] = matct[1][0] = term(-prism.d,prism.b); |
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return; |
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} |
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#undef term |
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|
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|
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static |
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tfm(mat,v_old,v_new) |
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MAT4 mat; |
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FVECT v_old,v_new; |
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{ |
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/* passage d'un repere old au repere new par la matrice mat */ |
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FVECT v_temp; |
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|
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multv3(v_temp,v_old,mat); |
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normalize(v_temp); |
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VCOPY(v_new,v_temp); |
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return; |
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} |
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|
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#define A prism.a |
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#define B prism.b |
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#define C prism.c |
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#define D prism.d |
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|
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|
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static double |
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prob_alpha_beta(r) |
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TRAYON r; |
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{ |
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/* calcul de la probabilite de passage de alpha a beta */ |
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double prob,test; |
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|
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if ( X(r) != 0. ) |
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{ |
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test = Y(r)/X(r); |
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if ( test > B/D ) prob = 1.; |
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else if ( test >= -A/D ) prob = (A+test*D)/(A+B); |
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else prob = 0.; |
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} |
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else prob = 0.; |
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return prob; |
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} |
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|
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|
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static double |
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prob_beta_alpha(r) |
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TRAYON r; |
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{ |
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/* calcul de la probabilite de passage de beta a aplha */ |
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double prob,test; |
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|
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if ( X(r) != 0. ) |
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{ |
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test = Y(r)/X(r); |
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if ( test > B/D ) prob = (A+B)/(A+test*D); |
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else if ( test >= -A/D ) prob = 1.; |
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else prob = 0.; |
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} |
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else prob = 0.; |
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return prob; |
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} |
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|
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|
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double prob_gamma_alpha(r) |
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TRAYON r; |
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{ |
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/* calcul de la probabilite de passage de gamma a alpha */ |
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double prob,test; |
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|
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if ( X(r) != 0. ) |
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{ |
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test = Y(r)/X(r); |
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if ( test > B/D ) prob = 0.; |
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else if ( test >= -A/D ) prob = 1.; |
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else prob = (A+B)/(B-test*D); |
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} |
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else prob = 0.; |
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return prob; |
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} |
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|
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#undef A |
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#undef B |
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#undef C |
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#undef D |
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|
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|
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static |
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v_par(v,v_out) |
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FVECT v,v_out; |
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/* calcule le vecteur par au plan d'incidence lie a v */ |
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{ |
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FVECT v_temp; |
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double det; |
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|
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det = sqrt( (YY(v)*YY(v)+ZZ(v)*ZZ(v))*(YY(v)*YY(v)+ZZ(v)*ZZ(v))+ |
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(XX(v)*XX(v)*YY(v)*YY(v))+(XX(v)*XX(v)*ZZ(v)*ZZ(v)) ); |
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XX(v_temp) = (YY(v)*YY(v)+ZZ(v)*ZZ(v))/det; |
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YY(v_temp) = -( XX(v)*YY(v) )/det; |
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ZZ(v_temp) = -( XX(v)*ZZ(v) )/det; |
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VCOPY(v_out,v_temp); |
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return; |
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} |
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|
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|
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static |
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v_per(v,v_out) |
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FVECT v,v_out; |
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/* calcule le vecteur perp au plan d'incidence lie a v */ |
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{ |
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FVECT v_temp; |
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double det; |
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|
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det = sqrt( (ZZ(v)*ZZ(v)+YY(v)*YY(v)) ); |
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XX(v_temp) = 0.; |
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YY(v_temp) = -ZZ(v)/det; |
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ZZ(v_temp) = YY(v)/det; |
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VCOPY(v_out,v_temp); |
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return; |
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} |
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|
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|
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static TRAYON |
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transalphabeta(r_initial) |
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/* transforme le rayon r_initial de la base associee a alpha dans |
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la base associee a beta */ |
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TRAYON r_initial; |
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{ |
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TRAYON r_final; |
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FVECT vpar_temp1,vpar_temp2,vper_temp1,vper_temp2; |
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|
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r_final = r_initial; |
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alpha_beta(r_initial.v,r_final.v); |
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if ((Y(r_initial) != 0. || Z(r_initial) != 0.)&&(Y(r_final) !=0. || Z(r_final)!= 0.)) |
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{ |
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v_par(r_initial.v,vpar_temp1); |
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alpha_beta(vpar_temp1,vpar_temp1); |
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v_per(r_initial.v,vper_temp1); |
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alpha_beta(vper_temp1,vper_temp1); |
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v_par(r_final.v,vpar_temp2); |
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v_per(r_final.v,vper_temp2); |
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r_final.ppar1 = (r_initial.ppar1*fdot(vpar_temp1,vpar_temp2))+ |
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(r_initial.pper1*fdot(vper_temp1,vpar_temp2)); |
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r_final.pper1 = (r_initial.ppar1*fdot(vpar_temp1,vper_temp2))+ |
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(r_initial.pper1*fdot(vper_temp1,vper_temp2)); |
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r_final.ppar2 = (r_initial.ppar2*fdot(vpar_temp1,vpar_temp2))+ |
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(r_initial.pper2*fdot(vper_temp1,vpar_temp2)); |
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r_final.pper2 = (r_initial.ppar2*fdot(vpar_temp1,vper_temp2))+ |
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(r_initial.pper2*fdot(vper_temp1,vper_temp2)); |
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} |
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return r_final; |
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} |
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|
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|
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static TRAYON |
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transbetaalpha(r_initial) |
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/* transforme le rayon r_initial de la base associee a beta dans |
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la base associee a alpha */ |
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TRAYON r_initial; |
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{ |
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TRAYON r_final; |
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FVECT vpar_temp1,vpar_temp2,vper_temp1,vper_temp2; |
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|
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r_final = r_initial; |
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beta_alpha(r_initial.v,r_final.v); |
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if ((Y(r_initial) != 0. || Z(r_initial) != 0. )&&(Y(r_final) != 0. || Z(r_final)!= 0.)) |
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{ |
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v_par(r_initial.v,vpar_temp1); |
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beta_alpha(vpar_temp1,vpar_temp1); |
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v_per(r_initial.v,vper_temp1); |
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beta_alpha(vper_temp1,vper_temp1); |
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v_par(r_final.v,vpar_temp2); |
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v_per(r_final.v,vper_temp2); |
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r_final.ppar1 = (r_initial.ppar1*fdot(vpar_temp1,vpar_temp2))+ |
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(r_initial.pper1*fdot(vper_temp1,vpar_temp2)); |
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r_final.pper1 = (r_initial.ppar1*fdot(vpar_temp1,vper_temp2))+ |
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(r_initial.pper1*fdot(vper_temp1,vper_temp2)); |
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r_final.ppar2 = (r_initial.ppar2*fdot(vpar_temp1,vpar_temp2))+ |
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(r_initial.pper2*fdot(vper_temp1,vpar_temp2)); |
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r_final.pper2 = (r_initial.ppar2*fdot(vpar_temp1,vper_temp2))+ |
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(r_initial.pper2*fdot(vper_temp1,vper_temp2)); |
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|
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} |
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return r_final; |
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} |
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|
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|
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static TRAYON |
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transalphagamma(r_initial) |
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/* transforme le rayon r_initial de la base associee a alpha dans |
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la base associee a gamma */ |
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TRAYON r_initial; |
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{ |
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TRAYON r_final; |
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FVECT vpar_temp1,vpar_temp2,vper_temp1,vper_temp2; |
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|
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r_final = r_initial; |
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alpha_gamma(r_initial.v,r_final.v); |
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if (( Y(r_initial) != 0. || Z(r_initial) != 0. )&&(Y(r_final)!= 0. || Z(r_final) !=0.)) |
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{ |
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v_par(r_initial.v,vpar_temp1); |
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alpha_gamma(vpar_temp1,vpar_temp1); |
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v_per(r_initial.v,vper_temp1); |
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alpha_gamma(vper_temp1,vper_temp1); |
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v_par(r_final.v,vpar_temp2); |
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v_per(r_final.v,vper_temp2); |
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r_final.ppar1 = (r_initial.ppar1*fdot(vpar_temp1,vpar_temp2))+ |
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(r_initial.pper1*fdot(vper_temp1,vpar_temp2)); |
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r_final.pper1 = (r_initial.ppar1*fdot(vpar_temp1,vper_temp2))+ |
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(r_initial.pper1*fdot(vper_temp1,vper_temp2)); |
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r_final.ppar2 = (r_initial.ppar2*fdot(vpar_temp1,vpar_temp2))+ |
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(r_initial.pper2*fdot(vper_temp1,vpar_temp2)); |
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r_final.pper2 = (r_initial.ppar2*fdot(vpar_temp1,vper_temp2))+ |
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(r_initial.pper2*fdot(vper_temp1,vper_temp2)); |
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|
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} |
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return r_final; |
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} |
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|
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|
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static TRAYON |
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transgammaalpha(r_initial) |
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/* transforme le rayon r_initial de la base associee a gamma dans |
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la base associee a alpha */ |
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TRAYON r_initial; |
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{ |
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TRAYON r_final; |
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FVECT vpar_temp1,vpar_temp2,vper_temp1,vper_temp2; |
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|
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r_final = r_initial; |
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gamma_alpha(r_initial.v,r_final.v); |
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if (( Y(r_initial) != 0. || Z(r_initial) != 0. )&&(Y(r_final) !=0. || Z(r_final) != 0.)) |
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{ |
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v_par(r_initial.v,vpar_temp1); |
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gamma_alpha(vpar_temp1,vpar_temp1); |
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v_per(r_initial.v,vper_temp1); |
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gamma_alpha(vper_temp1,vper_temp1); |
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v_par(r_final.v,vpar_temp2); |
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v_per(r_final.v,vper_temp2); |
| 356 |
r_final.ppar1 = (r_initial.ppar1*fdot(vpar_temp1,vpar_temp2))+ |
| 357 |
(r_initial.pper1*fdot(vper_temp1,vpar_temp2)); |
| 358 |
r_final.pper1 = (r_initial.ppar1*fdot(vpar_temp1,vper_temp2))+ |
| 359 |
(r_initial.pper1*fdot(vper_temp1,vper_temp2)); |
| 360 |
r_final.ppar2 = (r_initial.ppar2*fdot(vpar_temp1,vpar_temp2))+ |
| 361 |
(r_initial.pper2*fdot(vper_temp1,vpar_temp2)); |
| 362 |
r_final.pper2 = (r_initial.ppar2*fdot(vpar_temp1,vper_temp2))+ |
| 363 |
(r_initial.pper2*fdot(vper_temp1,vper_temp2)); |
| 364 |
} |
| 365 |
return r_final; |
| 366 |
} |
| 367 |
|
| 368 |
|
| 369 |
|
| 370 |
|
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static |
| 372 |
sortie(r) |
| 373 |
TRAYON r; |
| 374 |
{ |
| 375 |
int i = 0; |
| 376 |
int egalite = 0; |
| 377 |
|
| 378 |
|
| 379 |
if(r.e > seuil) |
| 380 |
{ |
| 381 |
while (i < nbrayons && egalite == 0) |
| 382 |
{ |
| 383 |
raytemp = &ray[i]; |
| 384 |
egalite = compare(r,*raytemp,tolerance); |
| 385 |
if (egalite) raytemp->e = raytemp->e + r.e; |
| 386 |
else i = i + 1; |
| 387 |
} |
| 388 |
if (egalite == 0) |
| 389 |
{ |
| 390 |
if (nbrayons == 0) ray = (TRAYON *)calloc(1,sizeof(TRAYON)); |
| 391 |
else ray = (TRAYON *)realloc(ray, (nbrayons+1)*(sizeof(TRAYON))); |
| 392 |
if (ray == NULL) |
| 393 |
error(SYSTEM, "out of memory in sortie\n"); |
| 394 |
raytemp = &ray[nbrayons]; |
| 395 |
raytemp->v[0] = X(r); |
| 396 |
raytemp->v[1] = Y(r); |
| 397 |
raytemp->v[2] = Z(r); |
| 398 |
raytemp->e = r.e; |
| 399 |
nbrayons++; |
| 400 |
} |
| 401 |
} |
| 402 |
return; |
| 403 |
} |
| 404 |
|
| 405 |
|
| 406 |
static |
| 407 |
trigo(r) |
| 408 |
TRAYON r; |
| 409 |
/* calcule les grandeurs trigonometriques relatives au rayon incident |
| 410 |
et le rapport entre les indices du milieu refracteur et incident */ |
| 411 |
{ |
| 412 |
double det; |
| 413 |
|
| 414 |
det = sqrt(X(r)*X(r)+Y(r)*Y(r)+Z(r)*Z(r)); |
| 415 |
sinus = sqrt(Y(r)*Y(r)+Z(r)*Z(r))/det; |
| 416 |
cosinus = sqrt(X(r)*X(r))/det; |
| 417 |
if (r.n == 1.) rapport = prism.np * prism.np; |
| 418 |
else rapport = 1./(prism.np * prism.np); |
| 419 |
return; |
| 420 |
} |
| 421 |
|
| 422 |
|
| 423 |
static TRAYON |
| 424 |
reflexion(r_incident) |
| 425 |
TRAYON r_incident; |
| 426 |
{ |
| 427 |
/* calcul du rayon reflechi par une face */ |
| 428 |
TRAYON r_reflechi; |
| 429 |
|
| 430 |
r_reflechi = r_incident; |
| 431 |
trigo(r_incident); |
| 432 |
X(r_reflechi) = -X(r_incident); |
| 433 |
Y(r_reflechi) = Y(r_incident); |
| 434 |
Z(r_reflechi) = Z(r_incident); |
| 435 |
if(sinus > sqrt(rapport) || r_incident.dest == tot_ref) |
| 436 |
{ |
| 437 |
r_reflechi.ppar1 = r_incident.ppar1; |
| 438 |
r_reflechi.pper1 = r_incident.pper1; |
| 439 |
r_reflechi.ppar2 = r_incident.ppar2; |
| 440 |
r_reflechi.pper2 = r_incident.pper2; |
| 441 |
r_reflechi.e = r_incident.e * fact_ref[r_incident.dest]; |
| 442 |
} |
| 443 |
else |
| 444 |
{ |
| 445 |
r_reflechi.ppar1 = r_incident.ppar1*(rapport*cosinus-sqrt(rapport- |
| 446 |
(sinus*sinus)))/(rapport*cosinus+sqrt(rapport-(sinus*sinus))); |
| 447 |
r_reflechi.pper1 = r_incident.pper1*(cosinus-sqrt |
| 448 |
(rapport-(sinus*sinus)))/(cosinus+sqrt(rapport-(sinus*sinus))); |
| 449 |
r_reflechi.ppar2 = r_incident.ppar2*(rapport*cosinus-sqrt(rapport- |
| 450 |
(sinus*sinus)))/(rapport*cosinus+sqrt(rapport-(sinus*sinus))); |
| 451 |
r_reflechi.pper2 = r_incident.pper2*(cosinus-sqrt |
| 452 |
(rapport-(sinus*sinus)))/(cosinus+sqrt(rapport-(sinus*sinus))); |
| 453 |
r_reflechi.e = r_incident.e *(((r_reflechi.ppar1*r_reflechi.ppar1+ |
| 454 |
r_reflechi.pper1*r_reflechi.pper1)/(r_incident.ppar1*r_incident.ppar1+ |
| 455 |
r_incident.pper1*r_incident.pper1))+((r_reflechi.ppar2*r_reflechi.ppar2 |
| 456 |
+r_reflechi.pper2*r_reflechi.pper2)/(r_incident.ppar2*r_incident.ppar2 |
| 457 |
+r_incident.pper2*r_incident.pper2)))/2; |
| 458 |
} |
| 459 |
|
| 460 |
/* a la sortie de cette routine r_transmis.orig et .dest ne sont pas definis!*/ |
| 461 |
return r_reflechi; |
| 462 |
} |
| 463 |
|
| 464 |
|
| 465 |
static TRAYON |
| 466 |
transmission(r_incident) |
| 467 |
TRAYON r_incident; |
| 468 |
{ |
| 469 |
/* calcul du rayon refracte par une face */ |
| 470 |
TRAYON r_transmis; |
| 471 |
|
| 472 |
r_transmis = r_incident; |
| 473 |
trigo(r_incident); |
| 474 |
if (sinus <= sqrt(rapport) && r_incident.dest != tot_ref) |
| 475 |
{ |
| 476 |
X(r_transmis) = (X(r_incident)/(fabs(X(r_incident))))* |
| 477 |
(sqrt(1.-(Y(r_incident)*Y(r_incident)+Z(r_incident)* |
| 478 |
Z(r_incident))/rapport)); |
| 479 |
Y(r_transmis) = Y(r_incident)/sqrt(rapport); |
| 480 |
Z(r_transmis) = Z(r_incident)/sqrt(rapport); |
| 481 |
r_transmis.ppar1 = r_incident.ppar1*2.*sqrt(rapport)*cosinus/ |
| 482 |
(sqrt(rapport-sinus*sinus)+rapport*cosinus); |
| 483 |
r_transmis.pper1 = r_incident.pper1*2.*cosinus/(cosinus+sqrt(rapport |
| 484 |
- sinus*sinus)); |
| 485 |
r_transmis.ppar2 = r_incident.ppar2*2.*sqrt(rapport)*cosinus/ |
| 486 |
(sqrt(rapport-sinus*sinus)+rapport*cosinus); |
| 487 |
r_transmis.pper2 = r_incident.pper2*2.*cosinus/(cosinus+sqrt(rapport |
| 488 |
- sinus*sinus)); |
| 489 |
r_transmis.e = (r_incident.e/2)*(sqrt(rapport-sinus*sinus)/cosinus) |
| 490 |
*(((r_transmis.ppar1*r_transmis.ppar1+r_transmis.pper1* |
| 491 |
r_transmis.pper1) |
| 492 |
/(r_incident.ppar1*r_incident.ppar1+r_incident.pper1* |
| 493 |
r_incident.pper1))+ |
| 494 |
((r_transmis.ppar2*r_transmis.ppar2+r_transmis.pper2*r_transmis.pper2) |
| 495 |
/(r_incident.ppar2*r_incident.ppar2+r_incident.pper2*r_incident.pper2))); |
| 496 |
if(r_incident.n == 1.) r_transmis.n = prism.np; |
| 497 |
else r_transmis.n = 1.; |
| 498 |
} |
| 499 |
else r_transmis.e = 0.; |
| 500 |
|
| 501 |
/* a la sortie de cette routine r_transmis.orig et .dest ne sont pas definis!*/ |
| 502 |
|
| 503 |
return r_transmis; |
| 504 |
} |
| 505 |
|
| 506 |
|
| 507 |
|
| 508 |
|
| 509 |
static int |
| 510 |
compare(r1,r2,marge) |
| 511 |
TRAYON r1, r2; |
| 512 |
double marge; |
| 513 |
|
| 514 |
{ |
| 515 |
double arctg1, arctg2; |
| 516 |
|
| 517 |
arctg1 = atan2(Y(r1),X(r1)); |
| 518 |
arctg2 = atan2(Y(r2),X(r2)); |
| 519 |
if ((arctg1 - marge <= arctg2) && (arctg1 + marge >= arctg2)) return 1; |
| 520 |
else return 0; |
| 521 |
} |
| 522 |
|
| 523 |
|
| 524 |
|
| 525 |
#define ensuite(rayon,prob_passage,destination) r_suite = rayon; \ |
| 526 |
r_suite.e = prob_passage(rayon)*rayon.e; \ |
| 527 |
r_suite.dest = destination; \ |
| 528 |
if ( r_suite.e > seuil ) trace_rayon(r_suite) |
| 529 |
|
| 530 |
|
| 531 |
static |
| 532 |
trace_rayon(r_incident) |
| 533 |
TRAYON r_incident; |
| 534 |
{ |
| 535 |
/* trace le rayon donne */ |
| 536 |
TRAYON r_reflechi,r_transmis,r_suite; |
| 537 |
|
| 538 |
switch (r_incident.dest) |
| 539 |
{ |
| 540 |
case ALPHA: |
| 541 |
if ( r_incident.orig == ALPHA ) |
| 542 |
{ |
| 543 |
r_reflechi = reflexion(r_incident); |
| 544 |
sortie(r_reflechi); |
| 545 |
|
| 546 |
r_transmis = transmission(r_incident); |
| 547 |
r_transmis.orig = ALPHA; |
| 548 |
|
| 549 |
ensuite(r_transmis,prob_alpha_beta,BETA); |
| 550 |
ensuite(r_transmis,prob_alpha_gamma,GAMMA); |
| 551 |
} |
| 552 |
else |
| 553 |
{ |
| 554 |
r_reflechi = reflexion(r_incident); |
| 555 |
r_reflechi.orig = ALPHA; |
| 556 |
ensuite(r_reflechi,prob_alpha_beta,BETA); |
| 557 |
ensuite(r_reflechi,prob_alpha_gamma,GAMMA); |
| 558 |
|
| 559 |
r_transmis = transmission(r_incident); |
| 560 |
sortie(r_transmis); |
| 561 |
} |
| 562 |
break; |
| 563 |
case BETA: |
| 564 |
r_reflechi = transbetaalpha(reflexion(transalphabeta(r_incident))); |
| 565 |
r_reflechi.orig = BETA; |
| 566 |
r_transmis = transbetaalpha(transmission(transalphabeta |
| 567 |
(r_incident))); |
| 568 |
r_transmis.orig = GAMMA; |
| 569 |
if ( r_incident.n > 1.0 ) /* le rayon vient de l'interieur */ |
| 570 |
{ |
| 571 |
ensuite(r_reflechi,prob_beta_alpha,ALPHA); |
| 572 |
ensuite(r_reflechi,prob_beta_gamma,GAMMA); |
| 573 |
|
| 574 |
ensuite(r_transmis,prob_beta_gamma,GAMMA); |
| 575 |
ensuite(r_transmis,prob_beta_delta,DELTA); |
| 576 |
} |
| 577 |
else /* le rayon vient de l'exterieur */ |
| 578 |
{ |
| 579 |
ensuite(r_reflechi,prob_beta_gamma,GAMMA); |
| 580 |
ensuite(r_reflechi,prob_beta_delta,DELTA); |
| 581 |
|
| 582 |
ensuite(r_transmis,prob_beta_alpha,ALPHA); |
| 583 |
ensuite(r_transmis,prob_beta_gamma,GAMMA); |
| 584 |
} |
| 585 |
break; |
| 586 |
case GAMMA: |
| 587 |
r_reflechi = transgammaalpha(reflexion(transalphagamma(r_incident))); |
| 588 |
r_reflechi.orig = GAMMA; |
| 589 |
r_transmis = transgammaalpha(transmission(transalphagamma |
| 590 |
(r_incident))); |
| 591 |
r_transmis.orig = GAMMA; |
| 592 |
if ( r_incident.n > 1.0 ) /* le rayon vient de l'interieur */ |
| 593 |
{ |
| 594 |
ensuite(r_reflechi,prob_gamma_alpha,ALPHA); |
| 595 |
ensuite(r_reflechi,prob_gamma_beta,BETA); |
| 596 |
|
| 597 |
ensuite(r_transmis,prob_gamma_beta,BETA); |
| 598 |
ensuite(r_transmis,prob_gamma_delta,DELTA); |
| 599 |
} |
| 600 |
else /* le rayon vient de l'exterieur */ |
| 601 |
{ |
| 602 |
ensuite(r_reflechi,prob_gamma_beta,BETA); |
| 603 |
ensuite(r_reflechi,prob_gamma_delta,DELTA); |
| 604 |
|
| 605 |
ensuite(r_transmis,prob_gamma_alpha,ALPHA); |
| 606 |
ensuite(r_transmis,prob_gamma_beta,BETA); |
| 607 |
} |
| 608 |
break; |
| 609 |
case DELTA: |
| 610 |
if ( r_incident.orig != DELTA ) sortie(r_incident); |
| 611 |
else |
| 612 |
{ |
| 613 |
ensuite(r_incident,prob_delta_beta,BETA); |
| 614 |
ensuite(r_incident,prob_delta_gamma,GAMMA); |
| 615 |
} |
| 616 |
break; |
| 617 |
} |
| 618 |
return; |
| 619 |
} |
| 620 |
|
| 621 |
#undef ensuite |
| 622 |
|
| 623 |
static |
| 624 |
inverser(r1,r2) |
| 625 |
TRAYON *r1,*r2; |
| 626 |
|
| 627 |
{ |
| 628 |
TRAYON temp; |
| 629 |
temp = *r1; |
| 630 |
*r1 = *r2; |
| 631 |
*r2 = temp; |
| 632 |
} |
| 633 |
|
| 634 |
|
| 635 |
|
| 636 |
static double |
| 637 |
l_get_val() |
| 638 |
|
| 639 |
{ |
| 640 |
int val, dir, i, trouve, curseur; |
| 641 |
int nb; |
| 642 |
double valeur; |
| 643 |
TRAYON *rayt, raynull; |
| 644 |
|
| 645 |
if (prismclock < 0 || prismclock < eclock) setprism(); |
| 646 |
if (bidon == BADVAL) { |
| 647 |
errno = EDOM; |
| 648 |
return(0.0); |
| 649 |
} |
| 650 |
val = (int)(argument(1) + .5); |
| 651 |
dir = (int)(argument(2) + .5); |
| 652 |
nb = (int)(argument(3) + .5); |
| 653 |
X(raynull) = bidon; |
| 654 |
Y(raynull) = Z(raynull) = 0.; |
| 655 |
raynull.e = 0.; |
| 656 |
trouve = curseur = 0; |
| 657 |
if ( !nosource && nb==2 ) nb=1; /* on est en train de tracer la source |
| 658 |
a partir de sa seconde source virtuelle */ |
| 659 |
#ifdef DEBUG |
| 660 |
fprintf(stderr, " On considere le rayon no: %d\n", nb); |
| 661 |
#endif |
| 662 |
for(i=0; i < nbrayons &&!trouve; i++) |
| 663 |
{ |
| 664 |
if(ray[i].v[0] * dir * sens >= 0.) curseur ++; |
| 665 |
if(curseur == nb) |
| 666 |
{ |
| 667 |
rayt = &ray[i]; |
| 668 |
trouve = 1; |
| 669 |
} |
| 670 |
} |
| 671 |
if(!trouve) rayt = &raynull; |
| 672 |
switch(val) { |
| 673 |
case 0 : valeur = rayt->v[0]; |
| 674 |
break; |
| 675 |
case 1 : valeur = rayt->v[1]; |
| 676 |
break; |
| 677 |
case 2 : valeur = rayt->v[2]; |
| 678 |
break; |
| 679 |
case 3 : valeur = rayt->e; |
| 680 |
break; |
| 681 |
default : errno = EDOM; return(0.0); |
| 682 |
} |
| 683 |
#ifdef DEBUG |
| 684 |
fprintf(stderr, "get_val( %i, %i, %i) = %lf\n",val,dir,nb,valeur); |
| 685 |
#endif |
| 686 |
return valeur; |
| 687 |
} |
| 688 |
|
| 689 |
|
| 690 |
static |
| 691 |
setprism() |
| 692 |
|
| 693 |
{ |
| 694 |
double d; |
| 695 |
TRAYON r_initial,rsource; |
| 696 |
int i,j,k; |
| 697 |
|
| 698 |
prismclock = eclock; |
| 699 |
r_initial.ppar1 = r_initial.pper2 = 1.; |
| 700 |
r_initial.pper1 = r_initial.ppar2 = 0.; |
| 701 |
|
| 702 |
d = 1; prism.a = funvalue("arg", 1, &d); |
| 703 |
if(prism.a < 0.) goto badopt; |
| 704 |
d = 2; prism.b = funvalue("arg", 1, &d); |
| 705 |
if(prism.b < 0.) goto badopt; |
| 706 |
d = 3; prism.c = funvalue("arg", 1, &d); |
| 707 |
if(prism.c < 0.) goto badopt; |
| 708 |
d = 4; prism.d = funvalue("arg", 1, &d); |
| 709 |
if(prism.d < 0.) goto badopt; |
| 710 |
d = 5; prism.np = funvalue("arg", 1, &d); |
| 711 |
if(prism.np < 1.) goto badopt; |
| 712 |
d = 6; seuil = funvalue("arg", 1, &d); |
| 713 |
if (seuil < 0. || seuil >=1) goto badopt; |
| 714 |
d = 7; tot_ref = (int)(funvalue("arg", 1, &d) + .5); |
| 715 |
if (tot_ref != 1 && tot_ref != 2 && tot_ref != 4) goto badopt; |
| 716 |
if (tot_ref < 4 ) |
| 717 |
{ |
| 718 |
d = 8; fact_ref[tot_ref] = funvalue("arg", 1, &d); |
| 719 |
if (fact_ref[tot_ref] < 0. || fact_ref[tot_ref] > 1.) goto badopt; |
| 720 |
} |
| 721 |
d = 9; tolerance = funvalue("arg", 1, &d); |
| 722 |
if (tolerance <= 0.) goto badopt; |
| 723 |
d = 10; tolsource = funvalue("arg", 1, &d); |
| 724 |
if (tolsource < 0. ) goto badopt; |
| 725 |
X(r_initial) = varvalue("Dx"); |
| 726 |
Y(r_initial) = varvalue("Dy"); |
| 727 |
Z(r_initial) = varvalue("Dz"); |
| 728 |
#ifdef DEBUG |
| 729 |
fprintf(stderr,"dx=%lf dy=%lf dz=%lf\n",X(r_initial),Y(r_initial),Z(r_initial)); |
| 730 |
#endif |
| 731 |
|
| 732 |
/* initialisation */ |
| 733 |
prepare_matrices(); |
| 734 |
r_initial.e = 1.0; |
| 735 |
r_initial.n = 1.0; |
| 736 |
|
| 737 |
if(ray!=NULL) free(ray); |
| 738 |
nbrayons = 0; |
| 739 |
/* determination de l'origine et de la destination du rayon initial */ |
| 740 |
|
| 741 |
if ( X(r_initial) != 0.) |
| 742 |
{ |
| 743 |
if ( X(r_initial) > 0. ) |
| 744 |
{ |
| 745 |
r_initial.orig = r_initial.dest = ALPHA; |
| 746 |
sens = 1; |
| 747 |
} |
| 748 |
else if ( X(r_initial) < 0. ) |
| 749 |
{ |
| 750 |
r_initial.orig = r_initial.dest = DELTA; |
| 751 |
sens = -1; |
| 752 |
} |
| 753 |
|
| 754 |
normalize(r_initial.v); |
| 755 |
|
| 756 |
trace_rayon(r_initial); |
| 757 |
|
| 758 |
X(rsource) = varvalue("DxA"); |
| 759 |
Y(rsource) = varvalue("DyA"); |
| 760 |
Z(rsource) = varvalue("DzA"); |
| 761 |
nosource = ( X(rsource)==0. && Y(rsource)==0. && Z(rsource)==0. ); |
| 762 |
if ( !nosource ) |
| 763 |
{ |
| 764 |
for (j=0; j<nbrayons; j++) |
| 765 |
{ |
| 766 |
if ( !compare(ray[j],rsource,tolsource) ) ray[j].e =0.; |
| 767 |
} |
| 768 |
} |
| 769 |
for (j = 0; j < nbrayons; j++) |
| 770 |
{ |
| 771 |
for (i = j+1; i < nbrayons; i++) |
| 772 |
{ |
| 773 |
if (ray[j].e < ray[i].e) inverser(&ray[j],&ray[i]); |
| 774 |
} |
| 775 |
} |
| 776 |
|
| 777 |
bidon = 1; |
| 778 |
} |
| 779 |
else bidon = 0; |
| 780 |
return; |
| 781 |
|
| 782 |
/* message puis sortie si erreur dans la ligne de commande */ |
| 783 |
badopt: |
| 784 |
bidon = BADVAL; |
| 785 |
return; |
| 786 |
} |
| 787 |
|
| 788 |
setprismfuncs() |
| 789 |
{ |
| 790 |
funset("fprism_val", 3, '=', l_get_val); |
| 791 |
} |
