EXPORT INTERFACE *f_zoom_interface(
INTERFACE *intfc,
RECT_GRID *gr,
float *L, /* Lower coord of clip box */
float *U, /* upper coord of clip box */
float **Q) /* Rotation matrix */
{
INTERFACE *zoom_intfc;
DEBUG_ENTER(f_zoom_interface)
zoom_intfc = i_zoom_interface(intfc,gr,L,U,Q);
copy_rect_grid(computational_grid(intfc),gr);
rotate_and_zoom_rect_grid(computational_grid(zoom_intfc),L,U,Q);
DEBUG_LEAVE(f_zoom_interface)
return zoom_intfc;
} /*end f_zoom_interface*/
/*ARGSUSED*/
EXPORT INTERFACE *i_zoom_interface(
INTERFACE *given_intfc,
RECT_GRID *gr,
double *L,
double *U,
double **Q)
{
INTERFACE *cur_intfc;
INTERFACE *zoom_intfc;
RECT_GRID *t_gr;
int dim = given_intfc->dim;
int i, j;
double **Qi = NULL;
static double **pc = NULL;
debug_print("zoom","Entered zoom_interface()\n");
cur_intfc = current_interface();
if ((zoom_intfc = copy_interface(given_intfc)) == NULL)
{
Error(ERROR,"Unable to copy interface.");
clean_up(ERROR);
}
if (debugging("zoom"))
{
(void) output();
(void) printf("INTERFACE before zoom:\n\n");
print_interface(zoom_intfc);
}
if (Q != NULL)
{
static double** M = NULL;
if (M == NULL)
bi_array(&M,MAXD,MAXD,FLOAT);
Qi = M;
for (i = 0; i < dim; i++)
for (j = 0; j < dim; j++)
Qi[i][j] = Q[j][i];
}
if (pc == NULL)
bi_array(&pc,MAXNCORNERS,MAXD,FLOAT);
calculate_box(L,U,pc,Q,Qi,dim);
/* Shrink topological grid to cutting boundary */
t_gr = &topological_grid(zoom_intfc);
rotate_and_zoom_rect_grid(t_gr,L,U,Q);
switch(dim)
{
case 1:
/* TODO */
return NULL;
case 2:
insert_cuts_and_bdry2d(zoom_intfc,pc);
clip_interface2d(zoom_intfc);
break;
case 3:
/* TODO */
return NULL;
}
rotate_interface(zoom_intfc,pc[0],Qi);
if (set_boundary(zoom_intfc,t_gr,component(pc[0],given_intfc),
grid_tolerance(gr) != FUNCTION_SUCCEEDED))
{
screen("ERROR in i_zoom_interface(), set_boundary failed\n");
clean_up(ERROR);
}
set_current_interface(cur_intfc);
if (debugging("zoom"))
{
(void) printf("INTERFACE after zoom:\n\n");
print_interface(zoom_intfc);
}
debug_print("zoom","Leaving zoom_interface()\n");
return zoom_intfc;
} /*end i_zoom_interface*/
