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/*****************************************************************
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m2d_param_cone.c Type:Func
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Parametrisation d'un cone
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Date de creation : Wed Feb 5 10:24:37 1997
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Derniere version : Mon May 12 18:52:36 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 <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 s_acis *acis;
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extern struct s_param *para;
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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_param_cone(struct s_face *face,struct s_cone *cone)
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{
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float vec[4];
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struct s_loop *loop;
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struct s_coedge *coedge;
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struct s_segment *seg;
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struct s_noeud *no1;
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int i;
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int pass=0;
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if (cone->param==NULL)
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{
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NEW_ENTITE(cone->param,par_cone,para->);
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memcpy(cone->param->centre,cone->center,3*sizeof(float));
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memcpy(vec,cone->major,3*sizeof(float));
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NORME(vec);
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cone->param->a=vec[3];
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cone->param->b=cone->ratio*vec[3];
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memcpy(cone->param->u,vec,3*sizeof(float));
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memcpy(vec,cone->normal,3*sizeof(float));
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NORME(vec);
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memcpy(cone->param->w,vec,3*sizeof(float));
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PVEC(cone->param->v,cone->param->w,cone->param->u);
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cone->param->tg=cone->sinalph/cone->cosalph;
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}
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/* min max des parametres */
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for (loop=face->first_loop;loop!=NULL;loop=loop->next_loop)
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{
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coedge=loop->first_coedge;
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do
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{
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for (i=0;i<coedge->edge->nb_segment;i++)
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{
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seg=coedge->edge->segment[i];
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no1=ADRESSE(seg->n1,noeud,mesh->);
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eval_cone(face,cone->param,&no1->u,&no1->v,INVERSE,&no1->x,&no1->y,&no1->z,0.);
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if (pass==0)
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{
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pass=1;
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face->uinf=no1->u;
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face->usup=no1->u;
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face->vinf=no1->v;
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face->vsup=no1->v;
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}
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if (face->uinf>no1->u) face->uinf=no1->u;
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if (face->usup<no1->u) face->usup=no1->u;
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if (face->vinf>no1->v) face->vinf=no1->v;
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if (face->vsup<no1->v) face->vsup=no1->v;
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}
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coedge=coedge->next_coedge;
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}
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while (coedge!=loop->first_coedge);
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}
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face->rev_u=2*PI;
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face->rev_v=0.;
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}
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