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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "r3d_struct.h"
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#include "m3d_const.h"
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#include "m3d_hotes.h"
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#include "prototype2.h"
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extern GEST_MEM *gest_r ;
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extern int debug ;
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int r3d_gene(FACE *face,NOEUD **nresu,int *hist,float critere)
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{
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/* variables locales */
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float *coord ;
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NOEUD *noe_g ;
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int i, j ;
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float xi,yi, zi;
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float vab[3], vac[3], vbc[3], vn[3], norme, pvec[3], dist, dab, dbc, dac ;
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float crit ;
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int test_inter, nb, val ;
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float perimetre, hauteur, h ;
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float tab_xi[12] ;
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int ierr ;
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float hmin, hmax, elan ;
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nb = val = 0 ;
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*nresu = NULL ;
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coord = gest_r->coord ;
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/* barycentre du point */
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xi = (coord[x((face->n1)->num)] + coord[x((face->n2)->num)] + coord[x((face->n3)->num)])/3. ;
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yi = (coord[y((face->n1)->num)] + coord[y((face->n2)->num)] + coord[y((face->n3)->num)])/3. ;
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zi = (coord[z((face->n1)->num)] + coord[z((face->n2)->num)] + coord[z((face->n3)->num)])/3. ;
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/* calcul de la normale */
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vab[0] = coord[x((face->n2)->num)] - coord[x((face->n1)->num)] ;
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vab[1] = coord[y((face->n2)->num)] - coord[y((face->n1)->num)] ;
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vab[2] = coord[z((face->n2)->num)] - coord[z((face->n1)->num)] ;
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dab = NORME(vab) ;
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vac[0] = coord[x((face->n3)->num)] - coord[x((face->n1)->num)] ;
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vac[1] = coord[y((face->n3)->num)] - coord[y((face->n1)->num)] ;
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vac[2] = coord[z((face->n3)->num)] - coord[z((face->n1)->num)] ;
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dac = NORME(vac) ;
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vbc[0] = coord[x((face->n3)->num)] - coord[x((face->n2)->num)] ;
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vbc[1] = coord[y((face->n3)->num)] - coord[y((face->n2)->num)] ;
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vbc[2] = coord[z((face->n3)->num)] - coord[z((face->n2)->num)] ;
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dbc = NORME(vbc) ;
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hmin = min(dab,dac) ;
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hmin = min(hmin,dbc) ;
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hmax = max(dab,dac) ;
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hmax = max(hmin,dbc) ;
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elan = hmax/hmin ;
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if (elan < 2.) hmin = hmin/2. ;
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tab_xi[x(0)] = xi ;
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tab_xi[y(0)] = yi ;
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tab_xi[z(0)] = zi ;
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/*
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tab_xi[x(1)] = coord[x((face->n1)->num)] ;
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tab_xi[y(1)] = coord[y((face->n1)->num)] ;
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tab_xi[z(1)] = coord[z((face->n1)->num)] ;
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tab_xi[x(2)] = coord[x((face->n2)->num)] ;
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tab_xi[y(2)] = coord[y((face->n2)->num)] ;
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tab_xi[z(2)] = coord[z((face->n2)->num)] ;
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tab_xi[x(3)] = coord[x((face->n3)->num)] ;
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tab_xi[y(3)] = coord[y((face->n3)->num)] ;
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tab_xi[z(3)] = coord[z((face->n3)->num)] ;
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*/
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/* calcul du critere 2 D */
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pvec[0] = PVECX(vab,vac) ;
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pvec[1] = PVECY(vab,vac) ;
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pvec[2] = PVECZ(vab,vac) ;
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/* determination du critere */
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perimetre = dab + dbc + dac ;
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hauteur = perimetre/3. ;
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vn[0] = PVECX(vab,vac) ;
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vn[1] = PVECY(vab,vac) ;
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vn[2] = PVECZ(vab,vac) ;
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norme = NORME(vn) ;
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if (norme<EPSILON)
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{
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if (debug) printf("%s\n"," normale nulle M3D_GENE ") ;
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return(FAUX) ;
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}
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for (i=0;i<3;i++) vn[i] = vn[i]/norme ;
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/* strategie de generation */
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/* si la face de recherche a deja ete construite en generant un point, on peut boucler */
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/* creation du noeud */
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noe_g = r3d_c_noe() ;
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if (noe_g == NULL) return(FAUX) ;
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i = 0 ;
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j = 0 ;
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while (j<2)/* on fait varier la hauteur */
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{
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switch(j)
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{
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case 0 : val = (face->tab).val0 ;break ;
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case 1 : val = (face->tab).val1 ;break ;
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case 2 : val = (face->tab).val2 ;break ;
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case 3 : val = (face->tab).val3 ;break ;
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}
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if (val==0)
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{
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h = hmin/(5*j+1.) ;
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coord[x(noe_g->num)] = tab_xi[x(i)] + h * vn[0] ;
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coord[y(noe_g->num)] = tab_xi[y(i)] + h * vn[1] ;
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coord[z(noe_g->num)] = tab_xi[z(i)] + h * vn[2] ;
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/* ----------------------------------------------------------- */
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/* remarque : on ne cree le noeud que si le noeud est SOLUTION */
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/* ----------------------------------------------------------- */
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ierr = FAUX ;
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crit = m3d_e_qual(coord,(face->n1)->num,(face->n2)->num,(face->n3)->num,noe_g->num) ;
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if (crit>critere)
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{
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test_inter = r3d_cpfront(coord,face,noe_g,&ierr) ;
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if (ierr == VRAI)
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{
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if (debug) printf("%s\n"," Erreur r3d_cpfront M3D_GENE ") ;
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return(FAUX) ;
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}
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if (test_inter==FAUX)
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/* on a trouve un noeud solution */
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{
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*nresu = noe_g ;
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if (face->hist == 0) *hist = PROCHE ;
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else *hist = GENERATION ;
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switch(j)
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{
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case 0 : (face->tab).val0 = 1 ;break ;
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case 1 : (face->tab).val1 = 1 ;break ;
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case 2 : (face->tab).val2 = 1 ;break ;
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case 3 : (face->tab).val3 = 1 ;break ;
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}
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return(VRAI) ;
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}
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}
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}
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j++ ;
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}
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/* le noeud n'est pas solution, on ne l'utilise pas */
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gest_r->nb_noeud = gest_r->nb_noeud - 1 ;
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*nresu=NULL ;
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return(VRAI) ;
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}
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