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/*****************************************************************
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oc_boite_ellipse.c Type:Func
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Mise en boite d une ellipse
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Date de creation : Wed Jun 25 15:37:09 1997
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Derniere version : Tue Aug 5 11:15:53 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 "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 environnement env;
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extern struct s_mesh *mesh;
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extern struct s_param *para;
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/**************************/
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/* programme principal */
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void oc_boite_ellipse(struct s_edge *edge,struct s_ellipse *ellipse,float *bxmin,float *bymin,float *bzmin,float *bxmax,float *bymax,float *bzmax)
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{
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struct s_vertex *vertex1,*vertex2;
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int i;
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float coord[4],para[4];
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vertex1=edge->start_vertex;
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vertex2=edge->end_vertex;
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MINI(*bxmin,*bxmin,vertex1->point->coord[0]);
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MINI(*bymin,*bymin,vertex1->point->coord[1]);
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MINI(*bzmin,*bzmin,vertex1->point->coord[2]);
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MAXI(*bxmax,*bxmax,vertex1->point->coord[0]);
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MAXI(*bymax,*bymax,vertex1->point->coord[1]);
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MAXI(*bzmax,*bzmax,vertex1->point->coord[2]);
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MINI(*bxmin,*bxmin,vertex2->point->coord[0]);
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MINI(*bymin,*bymin,vertex2->point->coord[1]);
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MINI(*bzmin,*bzmin,vertex2->point->coord[2]);
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MAXI(*bxmax,*bxmax,vertex2->point->coord[0]);
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MAXI(*bymax,*bymax,vertex2->point->coord[1]);
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MAXI(*bzmax,*bzmax,vertex2->point->coord[2]);
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eval_ellipse(ellipse->param,0.,ZERO_DERIVE,para);
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for (i=0;i<4;i++)
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{
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if (para[i]<edge->t1) para[i]=para[i]+2*PI;
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if (edge->t1+edge->t2>=para[i])
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{
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eval_ellipse(ellipse->param,para[i],FONCTION,coord);
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MINI(*bxmin,*bxmin,coord[0]);
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MINI(*bymin,*bymin,coord[1]);
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MINI(*bzmin,*bzmin,coord[2]);
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MAXI(*bxmax,*bxmax,coord[0]);
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MAXI(*bymax,*bymax,coord[1]);
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MAXI(*bzmax,*bzmax,coord[2]);
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}
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}
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}
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