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/*****************************************************************
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o2d_opt_point.c Type:Func
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Bouge de point
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Date de creation : Mon May 26 17:39:46 1997
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Derniere version : Wed Jun 4 14:35:04 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 "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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int o2d_opt_point(struct s_face *face,struct s_noeud *no,float *crit,float *nu,float *nv,float *nx,float *ny,float *nz)
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{
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struct s_noeud *no1,*no2,*no3,*nob1,*nob2,*noa,*nob,*noc;
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struct s_triangle *tri;
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float xdep,ydep,zdep,udep,vdep;
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float du,dv,u,v,u1,u2,v1,v2,uopt,vopt;
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float ddeb,alpha,d,n1n3[4],n1n2[4],normal1[4],normal2[4];
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float qual,qualcourant,qualcoq,qualtmp,qual1,qual2,qual3,qual4,qual5,qual6,qual7,qual8;
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int i;
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if (no->num_ent!=face->num) return(0);
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if (no->creation==RECUPERER) return(0);
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xdep=no->x;
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ydep=no->y;
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zdep=no->z;
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udep=no->u;
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vdep=no->v;
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/* decalage de parametre */
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if (mesh->rev_u!=0.) du=0.5*mesh->rev_u-udep; else du=0.;
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if (mesh->rev_v!=0.) dv=0.5*mesh->rev_v-vdep; else dv=0.;
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eval_decale(&u,du,no->u,U);
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eval_decale(&v,dv,no->v,V);
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uopt=0.;
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vopt=0.;
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qual=1.;
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/* critere de depart */
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for (i=0;i<no->nb_triangle;i++)
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{
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MINI(qual,qual,no->triangle[i]->crit);
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no1=ADRESSE(no->triangle[i]->n1,noeud,mesh->);
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no2=ADRESSE(no->triangle[i]->n2,noeud,mesh->);
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no3=ADRESSE(no->triangle[i]->n3,noeud,mesh->);
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if (no==no1)
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{
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nob1=no2;
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nob2=no3;
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}
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if (no==no2)
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{
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nob1=no1;
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nob2=no3;
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}
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if (no==no3)
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{
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nob1=no1;
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nob2=no2;
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}
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eval_decale(&u1,du,nob1->u,LIBRE);
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eval_decale(&v1,dv,nob1->v,LIBRE);
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uopt=uopt+u1;
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vopt=vopt+v1;
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eval_decale(&u1,du,nob2->u,LIBRE);
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eval_decale(&v1,dv,nob2->v,LIBRE);
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uopt=uopt+u1;
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vopt=vopt+v1;
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}
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uopt=uopt/no->nb_triangle/2.;
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vopt=vopt/no->nb_triangle/2.;
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ddeb=(float)sqrt((double)((u-uopt)*(u-uopt)+(v-vopt)*(v-vopt)));
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alpha=0.5;
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d=alpha*ddeb;
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qualcourant=qual;
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while (alpha>0.1)
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{
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/* cas 1 */
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u2=u+d;
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v2=v;
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eval_face(face,&u2,&v2,FONCTION,&no->x,&no->y,&no->z,du,dv);
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qual1=1.;
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for (i=0;i<no->nb_triangle;i++)
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{
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tri=no->triangle[i];
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qualtmp=m2d_cal_qual(tri->n1,tri->n2,tri->n3);
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noa=ADRESSE(tri->n1,noeud,mesh->);
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nob=ADRESSE(tri->n2,noeud,mesh->);
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noc=ADRESSE(tri->n3,noeud,mesh->);
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VEC(n1n3,noa,noc);
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VEC(n1n2,noa,nob);
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eval_normal(face,normal2,u2-du,v2-dv);
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PVEC(normal1,normal2,n1n3);
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if (PSCA(normal1,n1n2)<0.0001) qualtmp=0.;;
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if (qualtmp<qual1) qual1=qualtmp;
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}
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/* cas 2 */
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u2=u-d;
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v2=v;
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eval_face(face,&u2,&v2,FONCTION,&no->x,&no->y,&no->z,du,dv);
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qual2=1.;
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for (i=0;i<no->nb_triangle;i++)
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{
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tri=no->triangle[i];
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qualtmp=m2d_cal_qual(tri->n1,tri->n2,tri->n3);
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noa=ADRESSE(tri->n1,noeud,mesh->);
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nob=ADRESSE(tri->n2,noeud,mesh->);
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noc=ADRESSE(tri->n3,noeud,mesh->);
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VEC(n1n3,noa,noc);
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VEC(n1n2,noa,nob);
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eval_normal(face,normal2,u2-du,v2-dv);
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PVEC(normal1,normal2,n1n3);
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if (PSCA(normal1,n1n2)<0.0001) qualtmp=0.;;
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if (qualtmp<qual2) qual2=qualtmp;
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}
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/* cas 3 */
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u2=u;
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v2=v+d;
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eval_face(face,&u2,&v2,FONCTION,&no->x,&no->y,&no->z,du,dv);
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qual3=1.;
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for (i=0;i<no->nb_triangle;i++)
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{
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tri=no->triangle[i];
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qualtmp=m2d_cal_qual(tri->n1,tri->n2,tri->n3);
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noa=ADRESSE(tri->n1,noeud,mesh->);
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nob=ADRESSE(tri->n2,noeud,mesh->);
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noc=ADRESSE(tri->n3,noeud,mesh->);
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VEC(n1n3,noa,noc);
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VEC(n1n2,noa,nob);
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eval_normal(face,normal2,u2-du,v2-dv);
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PVEC(normal1,normal2,n1n3);
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if (PSCA(normal1,n1n2)<0.0001) qualtmp=0.;;
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if (qualtmp<qual3) qual3=qualtmp;
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}
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/* cas 4 */
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u2=u;
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v2=v-d;
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eval_face(face,&u2,&v2,FONCTION,&no->x,&no->y,&no->z,du,dv);
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qual4=1.;
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for (i=0;i<no->nb_triangle;i++)
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{
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tri=no->triangle[i];
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qualtmp=m2d_cal_qual(tri->n1,tri->n2,tri->n3);
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noa=ADRESSE(tri->n1,noeud,mesh->);
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nob=ADRESSE(tri->n2,noeud,mesh->);
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noc=ADRESSE(tri->n3,noeud,mesh->);
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VEC(n1n3,noa,noc);
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VEC(n1n2,noa,nob);
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eval_normal(face,normal2,u2-du,v2-dv);
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PVEC(normal1,normal2,n1n3);
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if (PSCA(normal1,n1n2)<0.0001) qualtmp=0.;;
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if (qualtmp<qual4) qual4=qualtmp;
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}
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/* cas 5 */
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u2=u+d*0.707106;
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v2=v+d*0.707106;
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eval_face(face,&u2,&v2,FONCTION,&no->x,&no->y,&no->z,du,dv);
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qual5=1.;
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for (i=0;i<no->nb_triangle;i++)
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{
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tri=no->triangle[i];
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qualtmp=m2d_cal_qual(tri->n1,tri->n2,tri->n3);
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noa=ADRESSE(tri->n1,noeud,mesh->);
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nob=ADRESSE(tri->n2,noeud,mesh->);
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noc=ADRESSE(tri->n3,noeud,mesh->);
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VEC(n1n3,noa,noc);
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VEC(n1n2,noa,nob);
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eval_normal(face,normal2,u2-du,v2-dv);
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PVEC(normal1,normal2,n1n3);
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if (PSCA(normal1,n1n2)<0.0001) qualtmp=0.;;
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if (qualtmp<qual5) qual5=qualtmp;
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}
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/* cas 6 */
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u2=u-d*0.707106;
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v2=v+d*0.707106;
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eval_face(face,&u2,&v2,FONCTION,&no->x,&no->y,&no->z,du,dv);
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qual6=1.;
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for (i=0;i<no->nb_triangle;i++)
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{
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tri=no->triangle[i];
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qualtmp=m2d_cal_qual(tri->n1,tri->n2,tri->n3);
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noa=ADRESSE(tri->n1,noeud,mesh->);
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nob=ADRESSE(tri->n2,noeud,mesh->);
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noc=ADRESSE(tri->n3,noeud,mesh->);
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VEC(n1n3,noa,noc);
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VEC(n1n2,noa,nob);
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eval_normal(face,normal2,u2-du,v2-dv);
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PVEC(normal1,normal2,n1n3);
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if (PSCA(normal1,n1n2)<0.0001) qualtmp=0.;;
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if (qualtmp<qual6) qual6=qualtmp;
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}
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/* cas 7 */
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u2=u-d*0.707106;
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v2=v-d*0.707106;
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eval_face(face,&u2,&v2,FONCTION,&no->x,&no->y,&no->z,du,dv);
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qual7=1.;
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for (i=0;i<no->nb_triangle;i++)
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{
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tri=no->triangle[i];
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qualtmp=m2d_cal_qual(tri->n1,tri->n2,tri->n3);
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noa=ADRESSE(tri->n1,noeud,mesh->);
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nob=ADRESSE(tri->n2,noeud,mesh->);
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noc=ADRESSE(tri->n3,noeud,mesh->);
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VEC(n1n3,noa,noc);
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VEC(n1n2,noa,nob);
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eval_normal(face,normal2,u2-du,v2-dv);
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PVEC(normal1,normal2,n1n3);
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if (PSCA(normal1,n1n2)<0.0001) qualtmp=0.;;
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if (qualtmp<qual7) qual7=qualtmp;
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}
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/* cas 8 */
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u2=u+d*0.707106;
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v2=v-d*0.707106;
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eval_face(face,&u2,&v2,FONCTION,&no->x,&no->y,&no->z,du,dv);
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qual8=1.;
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for (i=0;i<no->nb_triangle;i++)
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{
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tri=no->triangle[i];
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qualtmp=m2d_cal_qual(tri->n1,tri->n2,tri->n3);
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noa=ADRESSE(tri->n1,noeud,mesh->);
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nob=ADRESSE(tri->n2,noeud,mesh->);
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noc=ADRESSE(tri->n3,noeud,mesh->);
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VEC(n1n3,noa,noc);
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VEC(n1n2,noa,nob);
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eval_normal(face,normal2,u2-du,v2-dv);
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PVEC(normal1,normal2,n1n3);
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if (PSCA(normal1,n1n2)<0.0001) qualtmp=0.;;
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if (qualtmp<qual8) qual8=qualtmp;
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}
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MAXI(qualcoq,qual1,qual2);
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MAXI(qualcoq,qualcoq,qual3);
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MAXI(qualcoq,qualcoq,qual4);
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MAXI(qualcoq,qualcoq,qual5);
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MAXI(qualcoq,qualcoq,qual6);
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MAXI(qualcoq,qualcoq,qual7);
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MAXI(qualcoq,qualcoq,qual8);
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if (qualcoq<qualcourant+0.0001) alpha=alpha-0.1;
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else
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{
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if (qualcoq==qual1) u=u+d;
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if (qualcoq==qual2) u=u-d;
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if (qualcoq==qual3) v=v+d;
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if (qualcoq==qual4) v=v-d;
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if (qualcoq==qual5) {u=u+d*0.707106;v=v+d*0.707106;}
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if (qualcoq==qual6) {u=u-d*0.707106;v=v+d*0.707106;}
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if (qualcoq==qual7) {u=u-d*0.707106;v=v-d*0.707106;}
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if (qualcoq==qual8) {u=u+d*0.707106;v=v-d*0.707106;}
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qualcourant=qualcoq;
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}
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d=ddeb*alpha;
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}
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no->x=xdep;
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no->y=ydep;
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no->z=zdep;
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no->u=udep;
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no->v=vdep;
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if (qualcourant>qual)
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{
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*crit=qualcourant;
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eval_decale(nu,-du,u,U);
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eval_decale(nv,-dv,v,V);
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eval_face(face,nu,nv,FONCTION,nx,ny,nz,0.,0.);
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return(1);
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}
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else return(0);
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}
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