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/*****************************************************************
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m2d_d_segment.c Type:Func
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Suppression du dernier segment creer
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Date de creation : Wed Feb 26 15:54:11 1997
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Derniere version : Wed May 28 11:50:10 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 <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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/**************************/
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/* programme principal */
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void m2d_d_segment(struct s_segment **seg)
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{
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struct s_noeud *no1,*no2,*ac_no;
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struct s_segment *ac_seg;
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struct s_quadtree *quad;
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float longueur;
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float ui,vi,u1,v1,u2,v2,du,dv,uii,vii;
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int i,nb_liste;
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struct s_quadtree **liste_quad;
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ac_seg=(*seg);
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no1=ADRESSE(ac_seg->n1,noeud,mesh->);
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no2=ADRESSE(ac_seg->n2,noeud,mesh->);
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/* decalage */
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if (mesh->rev_u!=0.) du=0.5*mesh->rev_u-no1->u; else du=0.;
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if (mesh->rev_v!=0.) dv=0.5*mesh->rev_v-no1->v; else dv=0.;
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eval_decale(&u1,du,no1->u,U);
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eval_decale(&v1,dv,no1->v,V);
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eval_decale(&u2,du,no2->u,U);
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eval_decale(&v2,dv,no2->v,V);
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liste_quad=(struct s_quadtree **)calloc(mesh->nb_quadtree+1,sizeof(struct s_quadtree *));
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ERREUR_ALLOC(liste_quad);
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ui=0.5*(u1+u2);
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vi=0.5*(v1+v2);
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eval_decale(&uii,-du,ui,U);
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eval_decale(&vii,-dv,vi,V);
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longueur=(float)sqrt((double)((u2-u1)*(u2-u1)+(v2-v1)*(v2-v1)));
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nb_liste=0;
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qu_rechercher(ui-du,vi-dv,longueur/2.,mesh->root,liste_quad,&nb_liste);
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for (i=0;i<nb_liste;i++)
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{
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quad=liste_quad[i];
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if (quad->nb_segment>0)
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if (quad->segment[quad->nb_segment-1]==ac_seg) (quad->nb_segment)--;
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}
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ac_no=ADRESSE(ac_seg->n1,noeud,mesh->);
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(ac_no->nb_segment)--;
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ac_no=ADRESSE(ac_seg->n2,noeud,mesh->);
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(ac_no->nb_segment)--;
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free(liste_quad);
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(mesh->nb_segment)--;
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}
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