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/*****************************************************************
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eval_fdn2b_eps.c Type:Func
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Calcul de la densite en un point d une surface non plane
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Date de creation : Wed May 14 17:53:55 1997
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Derniere version : Tue Jul 29 11:20:33 1997
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Vincent FRANCOIS
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*****************************************************************/
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/**************************/
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/* include */
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include <stdlib.h>
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#include "const.h"
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#include "memoire.h"
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#include "struct.h"
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#include "prototype.h"
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/**************************/
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/* variables globales */
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extern struct environnement env;
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extern struct s_mesh *mesh;
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extern struct s_acis *acis;
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/**************************/
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/* programme principal */
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float eval_fdn2_eps(struct s_face *face,float u,float v)
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{
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float x,y,z,du,dv,de,dg;
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float e,g,dens,xuu[4],xuv[4],xvv[4];
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float xu[4],xv[4];
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float m1[4],m2[4],m3[4];
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du=0.;dv=0.;
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if (strcmp(acis->type_entite[face->surface],"plane-surface")==0)
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{
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return(env.dens*10000.);
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}
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e=eval_face(face,&u,&v,E,&x,&y,&z,du,dv);
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g=eval_face(face,&u,&v,G,&x,&y,&z,du,dv);
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de=eval_face(face,&u,&v,EU,&x,&y,&z,du,dv);
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dg=eval_face(face,&u,&v,GV,&x,&y,&z,du,dv);
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eval_face(face,&u,&v,DUU,&xuu[0],&xuu[1],&xuu[2],du,dv);
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eval_face(face,&u,&v,DUV,&xuv[0],&xuv[1],&xuv[2],du,dv);
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eval_face(face,&u,&v,DVV,&xvv[0],&xvv[1],&xvv[2],du,dv);
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eval_face(face,&u,&v,DU,&xu[0],&xu[1],&xu[2],du,dv);
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eval_face(face,&u,&v,DV,&xv[0],&xv[1],&xv[2],du,dv);
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m1[0]=(float)(xuu[0]/e-0.5*xu[0]*de/e/e);
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m1[1]=(float)(xuu[1]/e-0.5*xu[1]*de/e/e);
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m1[2]=(float)(xuu[2]/e-0.5*xu[2]*de/e/e);
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m2[0]=(float)(xuv[0]/sqrt((double)(e*g)));
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m2[1]=(float)(xuv[1]/sqrt((double)(e*g)));
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m2[2]=(float)(xuv[2]/sqrt((double)(e*g)));
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m3[0]=(float)(xvv[0]/g-0.5*xv[0]*dg/g/g);
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m3[1]=(float)(xvv[1]/g-0.5*xv[1]*dg/g/g);
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m3[2]=(float)(xvv[2]/g-0.5*xv[2]*dg/g/g);
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NORME(m1);
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NORME(m2);
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NORME(m3);
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if (env.relatif==0) dens=(float)sqrt((double)(4.5*env.epsilon/(m1[3]+2*m2[3]+m3[3])));
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else dens=(float)sqrt((double)(4.5*env.epsilon/(m1[3]+2*m2[3]+m3[3])/(m1[3]+2*m2[3]+m3[3])));
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return(dens);
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}
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