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e_test_P.c
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Sun, Dec 29, 04:18

e_test_P.c
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#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include "fonction.h"
#include "constant.h"
#include"dimension.h"
#include "structure.h"
/****************************************************************/
/* nom: e_test_P */
/* auteur: Jean-Paul Kneib */
/* date: 10/02/92 */
/* place: Toulouse */
/****************************************************************
* Test if it is possible to find 2 small triangles that contains the
* source in the source plane and one arclet found previously in the
* image plane.
*
* Fill the image list with the position of the arclets corresponding
* to the source.
*
* The arclets must have their source close enough from
* the effective source position and far enough from the previously
* found arclet of the same familly.
*
* Return the number of arclet for this source.
*
* Parameters :
* - Tsol : a list of arclets of a familly (see inverse())
* - ni : number of arclets in Tsol
* - ps : source position
* - image : a list of images for this source
* - dlsds : DLS/DS ratio for the source
****************************************************************/
int e_test_P(struct bitriplet Tsol[NIMAX], int ni,
struct point *ps,
struct point image[NIMAX],
double dlsds, double err)
{
int it;
//struct bitriplet btriangle;
struct bitriplet btp; /*the smallest bitriangle around the source point*/
//struct chaine *parent;
double D;
int i, j;
j = 0;
for ( i = 0 ; i < ni ; i++ )
{
//btriangle.i=(Tsol->I);
//btriangle.s=(Tsol->S);
it = 0;
e_im_prec(&Tsol[i], ps, dlsds, &it, &btp);
image[j] = barycentre(&btp.i);
D = dist2(barycentre(&btp.s), (*ps));
/*
if ((D<err)&&((j==0)||(dd=dist2(image[j],image[j-1])>err)))
98/09/16: D test removed, this was checking the resolution in the source
plane which is not important for this routine.
06/10/12: D test introduced again because of merging with the e_testclean() function
*/
if ((D < err) && ((j == 0) || (dist2(image[j], image[j-1]) > err)))
j++;
/*parent = Tsol;
Tsol=(Tsol->F);
free(parent);*/
};
return(j);
}

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