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/* Functions: PS_area_plot
**
** Author: Radim Blazek Jan 2000
** modified copy of ps_vector.c by Paul W. Carlson March 1992
*/
#include "vector.h"
#include "Vect.h"
#include "ps_info.h"
#include "local_proto.h"
/* constuct subpath with moveto and repeated lineto from Points */
int construct_path (struct line_pnts *Points, double shift, int t)
{
int i, np, k = 1;
double *xarray, *yarray, x, y;
np = Points->n_points;
xarray = Points->x;
yarray = Points->y;
for (i = 0; i < np ; i++)
{
x = XCONV(xarray[0]+shift);
y = YCONV(yarray[0]);
fprintf(PS.fp, "%.1f %.1f ", x, y);
if ( i==0 && ( t == START_PATH || t == WHOLE_PATH) )
{
fprintf(PS.fp, "M ");
}
else
{
fprintf(PS.fp, "LN ");
}
if (k == 2)
{
fprintf(PS.fp, "\n");
k = 0;
}
else
{
fprintf(PS.fp, " ");
k++;
}
xarray++;
yarray++;
}
if ( t == CLOSE_PATH || t == WHOLE_PATH )
{
fprintf(PS.fp, "CP\n");
}
return 1;
}
/* create paths for area and islands */
static int plot_area (struct Map_info *P_map, int area, double shift)
{
struct line_pnts *Points;
int j, ret, ni, island;
/* allocate memory for coordinates */
Points = Vect_new_line_struct();
/* plot areas */
if (0 > (ret = Vect_get_area_points(P_map, area, Points))) {
if (ret == -1) G_warning("Read error in vector file\n");
return 0;
}
construct_path (Points, shift, WHOLE_PATH);
/* plot islands */
ni = Vect_get_area_num_isles (P_map, area);
for (j=0; j < ni; j++) {
island = Vect_get_area_isle (P_map, area, j);
if (0 > (ret = Vect_get_isle_points(P_map, island, Points))) {
if (ret == -1) G_warning("Read error in vector file\n");
return -1;
}
construct_path (Points, shift, WHOLE_PATH);
}
return 1;
}
/* plot areas */
int PS_vareas_plot (struct Map_info *P_map, int vec)
{
int na, area, ret;
double e, w, n, s, aw, shift;
double llx, lly, urx, ury, sc;
char pat[50];
struct line_cats *Cats;
BOUND_BOX box;
VARRAY *Varray = NULL;
fprintf(PS.fp, "1 setlinejoin\n"); /* set line join to round */
Cats = Vect_new_cats_struct ();
/* Create vector array if required */
if ( vector.layer[vec].cats != NULL || vector.layer[vec].where != NULL ) {
Varray = Vect_new_varray ( Vect_get_num_areas(P_map) );
if ( vector.layer[vec].cats != NULL ) {
ret = Vect_set_varray_from_cat_string (P_map, vector.layer[vec].field,
vector.layer[vec].cats, GV_AREA, 1, Varray );
} else {
ret = Vect_set_varray_from_db (P_map, vector.layer[vec].field,
vector.layer[vec].where, GV_AREA, 1, Varray );
}
G_debug ( 3, "%d items selected for vector %d", ret, vec );
}
shift = 0;
/* read and plot areas */
na = Vect_get_num_areas(P_map);
for (area = 1; area <= na; area++) {
if ( Varray != NULL && Varray->c[area] == 0 ) continue; /* is not in array */
Vect_get_area_box (P_map, area, &box);
n = box.N;
s = box.S;
e = box.E;
w = box.W;
if (PS.w.proj == PROJECTION_LL)
{
aw = G_adjust_easting(w, &PS.w);
if ( aw > PS.w.east ) aw -= 360.0;
shift = aw - w;
e += shift;
w += shift;
}
/* check if in window */
if ( n < PS.w.south || s > PS.w.north || e < PS.w.west || w > PS.w.east )
continue;
fprintf(PS.fp, "NP\n");
if (PS.w.proj == PROJECTION_LL)
{
/* plot area while in window */
while ( e > PS.w.west )
{
ret = plot_area (P_map, area, shift);
if ( ret != 1)
return 0;
shift -= 360.0;
e -= 360.0;
}
}
else
{
ret = plot_area (P_map, area, shift);
if ( ret != 1)
return 0;
}
if ( vector.layer[vec].pat != NULL || !(color_none ( &vector.layer[vec].fcolor) ) ) {
if ( vector.layer[vec].pat != NULL ) { /* use pattern */
sc = vector.layer[vec].scale;
/* DEBUG */
/*
printf("\n eps pattern = %s\n", vector.layer[vec].eps);
printf(" scale = %f\n", vector.layer[vec].scale);
*/
/* load pattern */
eps_bbox( vector.layer[vec].pat , &llx, &lly, &urx, &ury);
sprintf ( pat, "APATTEPS%d", vec);
pat_save ( PS.fp, vector.layer[vec].pat, pat);
fprintf(PS.fp, "<< /PatternType 1\n /PaintType 1\n /TilingType 1\n");
fprintf(PS.fp, " /BBox [%f %f %f %f]\n", llx * sc, lly * sc, urx * sc, ury * sc );
fprintf(PS.fp, " /XStep %f\n /YStep %f\n", (urx - llx) * sc, (ury - lly) * sc);
fprintf(PS.fp, " /PaintProc\n { begin\n");
fprintf(PS.fp, " %f %f scale\n", sc, sc);
set_ps_color ( &(vector.layer[vec].fcolor) );
fprintf(PS.fp, " %.8f W\n", vector.layer[vec].pwidth );
fprintf(PS.fp, " %s\n", pat);
fprintf(PS.fp, " end\n");
fprintf(PS.fp, " } bind\n>>\n");
sprintf ( pat, "APATT%d", vec);
fprintf(PS.fp, " matrix\n makepattern /%s exch def\n", pat);
fprintf(PS.fp, "/Pattern setcolorspace\n %s setcolor\n", pat);
} else {
set_ps_color ( &(vector.layer[vec].fcolor) );
}
fprintf(PS.fp, "F\n");
}
if ( vector.layer[vec].width > 0 && !(color_none ( &vector.layer[vec].color)) )
{
fprintf(PS.fp, "%.8f W\n", vector.layer[vec].width );
set_ps_color ( &(vector.layer[vec].color) );
fprintf(PS.fp, "stroke\n");
}
}
fprintf(PS.fp, "\n");
fprintf(PS.fp, "0 setlinejoin\n"); /* reset line join to miter */
return 1;
}
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