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/*****************************************************************
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eval_dis_point_face.cpp Type:Func
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Calcul la distance d'un point de l'espace a un point d'une entite
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Date de creation : 2-2-1999 10 :11 :13
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Derniere version : 2-2-1999 10 :11 :13
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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 "struct.h"
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#include "const.h"
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#include "prototype.h"
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/**************************/
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/* variables globales */
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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_dis_point_face(struct s_face *face,float *x,float u,float v,int type)
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{
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float res;
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float xx[4],xu[4];
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if (type==FONCTION)
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{
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eval_face(face,&u,&v,FONCTION,&xx[0],&xx[1],&xx[2],0.,0.);
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res=(x[0]-xx[0])*(x[0]-xx[0])+(x[1]-xx[1])*(x[1]-xx[1])+(x[2]-xx[2])*(x[2]-xx[2]);
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}
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if (type==DU)
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{
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eval_face(face,&u,&v,FONCTION,&xx[0],&xx[1],&xx[2],0.,0.);
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eval_face(face,&u,&v,DU,&xu[0],&xu[1],&xu[2],0.,0.);
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res=(x[0]-xx[0])*xu[0]+(x[1]-xx[1])*xu[1]+(x[2]-xx[2])*xu[2];
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res=res*(-2);
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}
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if (type==DV)
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{
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eval_face(face,&u,&v,FONCTION,&xx[0],&xx[1],&xx[2],0.,0.);
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eval_face(face,&u,&v,DV,&xu[0],&xu[1],&xu[2],0.,0.);
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res=(x[0]-xx[0])*xu[0]+(x[1]-xx[1])*xu[1]+(x[2]-xx[2])*xu[2];
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res=res*(-2);
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}
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return(res);
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}
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