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/*****************************************************************
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geo_point_interieur.cpp Type:Func
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Position d un point sur une face
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Date de creation : 14-8-1997 15 :40 :14
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Derniere version : 14-8-1997 15 :40 :14
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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 <stdlib.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_maillage *maillage;
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extern struct s_acis *acis;
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/**************************/
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/* programme principal */
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int geo_point_interieur(float u,float v)
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{
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float du,dv,duu,dvv;
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int *test_quad,*test_front;
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struct s_quadtree **liste,*quad_depart,*quad;
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struct s_front *fr,*fref,*ftp,*ft,*fts;
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struct s_noeud *no1,*no2,*nop,*nos;
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int nb_liste,ok,i,j,pass,type,typeref;
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float dis,u1,v1,u2,v2,u2tmp,v2tmp,us,vs,up,vp,p1,p2,eps,det,ui,vi,d,lg_min;
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float w[4],pn1[4],n1n2[4],n2s[4],npn1[4],nn1n2[4],nn2s[4];
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float vecp[4],vec[4],vecs[4];
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w[0]=0.;w[1]=0.;w[2]=1.;
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/* cherche de l element du front le plus proche */
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/* calcul du decalage local */
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if (mesh->rev_u!=0.) du=0.5*mesh->rev_u-u; else du=0.;
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if (mesh->rev_v!=0.) dv=0.5*mesh->rev_v-v; else dv=0.;
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eval_decale(&u1,du,u,U);
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eval_decale(&v1,dv,v,V);
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u=u1;v=v1;
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/* variable de recherche */
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test_quad=(int *)calloc(mesh->nb_quadtree+1,sizeof(int));
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ERREUR_ALLOC(test_quad);
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liste=(struct s_quadtree **)calloc(mesh->nb_quadtree+1,sizeof(struct s_quadtree *));
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ERREUR_ALLOC(test_quad);
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test_front=(int *)calloc(mesh->nb_front+1,sizeof(int));
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ERREUR_ALLOC(test_front);
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/* recherche des frontieres proche du point u,v */
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nb_liste=0;
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qu_rechercher(u-du,v-dv,0.,mesh->root,liste,&nb_liste);
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if (nb_liste==0) return(0);
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quad_depart=liste[0];
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MAXI(dis,quad_depart->t_u,quad_depart->t_v);
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dis=dis/2.;
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fref=NULL;
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ok=0;
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while (ok<2)
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{
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nb_liste=0;
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qu_rechercher(u-du,v-dv,dis,mesh->root,liste,&nb_liste);
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pass=0;
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for (i=0;i<nb_liste;i++)
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{
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quad=liste[i];
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if (test_quad[quad->num]==0)
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{
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for (j=0;j<quad->nb_front;j++)
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{
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fr=quad->front[j];
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if (test_front[fr->num]==0)
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{
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test_front[fr->num]=1;
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no1=ADRESSE(fr->seg->n1,noeud,mesh->);
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no2=ADRESSE(fr->seg->n2,noeud,mesh->);
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if (mesh->rev_u!=0.) duu=0.5*mesh->rev_u-no1->u; else duu=0.;
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if (mesh->rev_v!=0.) dvv=0.5*mesh->rev_v-no1->v; else dvv=0.;
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eval_decale(&u2,duu,no2->u,U);
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eval_decale(&v2,dvv,no2->v,V);
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u2=u2-duu;
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v2=v2-dvv;
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eval_decale(&u1,du,no1->u,LIBRE);
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eval_decale(&v1,dv,no1->v,LIBRE);
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eval_decale(&u2tmp,du,u2,LIBRE);
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eval_decale(&v2tmp,dv,v2,LIBRE);
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u2=u2tmp;
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v2=v2tmp;
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/*eval_decale(&u1,du,no1->u,LIBRE);
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eval_decale(&v1,dv,no1->v,LIBRE);
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eval_decale(&u2,du,no2->u,LIBRE);
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eval_decale(&v2,dv,no2->v,LIBRE);*/
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p1=(u2-u1)*(u-u1)+(v2-v1)*(v-v1);
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p2=(u1-u2)*(u-u2)+(v1-v2)*(v-v2);
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eps=0.0001*(u1-u2)*(u1-u2)+0.0001*(v1-v2)*(v1-v2);
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type=2;
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if ((p1>(-eps)) && (p2>(-eps)))
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{
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det=(u1-u2)*(u1-u2)+(v1-v2)*(v1-v2);
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ui=(u1*(v2-v1)*(v2-v1)+(u1-u2)*(v2-v1)*(v1-v)+u*(u1-u2)*(u1-u2))/det;
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vi=(v1*(u1-u2)*(u1-u2)+(u1-u2)*(v1-v2)*(u-u1)+v*(v1-v2)*(v1-v2))/det;
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d=(float)sqrt((double)((u-ui)*(u-ui)+(v-vi)*(v-vi)));
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type=1;
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}
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else d=(float)(0.5*((sqrt((double)((u-u1)*(u-u1)+(v-v1)*(v-v1))))+(sqrt((double)((u-u2)*(u-u2)+(v-v2)*(v-v2))))));
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if (pass==0)
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{
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pass=1;
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lg_min=d;
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fref=fr;
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typeref=type;
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}
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else if (d<lg_min)
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{
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lg_min=d;
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fref=fr;
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typeref=type;
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}
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}
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}
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test_quad[quad->num]=1;
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}
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}
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dis=dis*1.25;
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if ((fref!=NULL) && (ok==0)) ok=1;
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if (ok==1) ok=2;
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}
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free(test_quad);
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free(test_front);
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free(liste);
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/* es t on a l interieur */
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ft=fref;
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fts=ft->suiv;
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ftp=ft->prec;
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nop=ADRESSE(ftp->n1,noeud,mesh->);
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no1=ADRESSE(ft->n1,noeud,mesh->);
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no2=ADRESSE(ft->n2,noeud,mesh->);
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nos=ADRESSE(fts->n2,noeud,mesh->);
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if (mesh->rev_u!=0.) duu=0.5*mesh->rev_u-no1->u; else duu=0.;
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if (mesh->rev_v!=0.) dvv=0.5*mesh->rev_v-no1->v; else dvv=0.;
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eval_decale(&up,duu,nop->u,U);
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eval_decale(&vp,dvv,nop->v,V);
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eval_decale(&u2,duu,no2->u,U);
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eval_decale(&v2,dvv,no2->v,V);
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eval_decale(&us,duu,nos->u,U);
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eval_decale(&vs,dvv,nos->v,V);
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up=up-duu;
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vp=vp-dvv;
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u2=u2-duu;
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v2=v2-dvv;
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us=us-duu;
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vs=vs-dvv;
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eval_decale(&u1,du,no1->u,LIBRE);
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eval_decale(&v1,dv,no1->v,LIBRE);
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eval_decale(&u2tmp,du,u2,LIBRE);u2=u2tmp;
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eval_decale(&v2tmp,dv,v2,LIBRE);v2=v2tmp;
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eval_decale(&u2tmp,du,up,LIBRE);up=u2tmp;
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eval_decale(&v2tmp,dv,vp,LIBRE);vp=v2tmp;
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eval_decale(&u2tmp,du,us,LIBRE);us=u2tmp;
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eval_decale(&v2tmp,dv,vs,LIBRE);vs=v2tmp;
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pn1[0]=u1-up;pn1[1]=v1-vp;pn1[2]=0.;
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n1n2[0]=u2-u1;n1n2[1]=v2-v1;n1n2[2]=0.;
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n2s[0]=us-u2;n2s[1]=vs-v2;n2s[2]=0.;
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PVEC(npn1,w,pn1);
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PVEC(nn1n2,w,n1n2);
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PVEC(nn2s,w,n2s);
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vecp[0]=u-up;vecp[1]=v-vp;vecp[2]=0.;
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vec[0]=u-u1;vec[1]=v-v1;vec[2]=0.;
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vecs[0]=u-us;vecs[1]=v-vs;vecs[2]=0.;
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if (typeref==2)
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if (PSCA(vecp,npn1)>(0.0001))
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if (PSCA(vec,nn1n2)>(0.0001))
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if (PSCA(vecs,nn2s)>(0.0001))
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return(1);
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if (typeref==1)
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if (PSCA(vec,nn1n2)>(-0.0001))
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return(1);
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return(0);
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}
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