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/*
* $Id: Gv3.c,v 1.8 2005/02/03 14:28:13 markus Exp $
*/
/* Gv.c
Bill Brown, USACERL
December 1993
Uses GRASS routines!
*/
#include <stdlib.h>
#include "gis.h"
#include "Vect.h"
#include "gstypes.h"
#define TRAK_MEM
#ifdef TRAK_MEM
static int Tot_mem = 0;
#endif
/* This loads to memory.
The other alternative may be to load to a tmp file. */
geoline *Gv_load_vect(char *grassname, int *nlines)
{
struct Map_info map;
struct line_pnts *points;
geoline *top, *gln, *prev;
int np, i, n, nareas, nl=0, area, type, is3d;
struct Cell_head wind;
float vect[2][3];
/* TODO: handle error messages */
Vect_set_open_level (2);
Vect_open_old (&map, grassname, "");
if (NULL == (top=gln=(geoline *)malloc(sizeof(geoline)))) {
fprintf(stderr,"Can't malloc.\n");
return(NULL);
}
prev = top;
#ifdef TRAK_MEM
Tot_mem+=sizeof(geoline);
#endif
points = Vect_new_line_struct ();
G_get_set_window (&wind) ;
Vect_set_constraint_region(&map,wind.north,wind.south,wind.east,wind.west,
PORT_DOUBLE_MAX, -PORT_DOUBLE_MAX);
is3d = Vect_is_3d ( &map );
/* Read areas */
n = Vect_get_num_areas (&map);
nareas = 0;
G_debug(3, "Reading vector areas (nareas = %d)", n);
for ( area = 1; area <= n ; area++ ) {
G_debug(3, " area %d", area);
Vect_get_area_points ( &map, area, points );
if ( points->n_points < 3 ) continue;
gln->type = OGSF_POLYGON;
gln->npts = np = points->n_points;
G_debug(3, " np = %d", np);
if ( is3d ) {
gln->dims = 3;
if (NULL == (gln->p3=(Point3 *)calloc(np, sizeof(Point3)))) {
fprintf(stderr,"Can't calloc.\n"); /* CLEAN UP */
return(NULL);
}
#ifdef TRAK_MEM
Tot_mem+=(np*sizeof(Point3));
#endif
} else {
gln->dims = 2;
if (NULL == (gln->p2=(Point2 *)calloc(np, sizeof(Point2)))) {
fprintf(stderr,"Can't calloc.\n"); /* CLEAN UP */
return(NULL);
}
#ifdef TRAK_MEM
Tot_mem+=(np*sizeof(Point2));
#endif
}
for (i=0; i < np; i++) {
if ( is3d ) {
gln->p3[i][X] = points->x[i];
gln->p3[i][Y] = points->y[i];
gln->p3[i][Z] = points->z[i];
} else {
gln->p2[i][X] = points->x[i];
gln->p2[i][Y] = points->y[i];
}
}
/* Calc normal (should be average) */
if ( is3d ) {
vect[0][X] = (float) ( gln->p3[0][X] - gln->p3[1][X] );
vect[0][Y] = (float) ( gln->p3[0][Y] - gln->p3[1][Y] );
vect[0][Z] = (float) ( gln->p3[0][Z] - gln->p3[1][Z] );
vect[1][X] = (float) ( gln->p3[2][X] - gln->p3[1][X] );
vect[1][Y] = (float) ( gln->p3[2][Y] - gln->p3[1][Y] );
vect[1][Z] = (float) ( gln->p3[2][Z] - gln->p3[1][Z] );
GS_v3cross( vect[1], vect[0], gln->norm );
}
if (NULL == (gln->next=(geoline *)malloc (sizeof(geoline)))) {
fprintf(stderr,"Can't malloc.\n"); /* CLEAN UP */
return(NULL);
}
#ifdef TRAK_MEM
Tot_mem+=sizeof(geoline);
#endif
prev = gln;
gln = gln->next;
nareas++;
}
G_debug(3, "%d areas loaded", nareas);
/* Read all lines */
G_debug(3, "Reading vector lines ...");
while (-1 < (type = Vect_read_next_line(&map, points, NULL))) {
G_debug(3, "line type = %d", type);
if ( type & ( GV_LINES | GV_FACE ) ) {
if ( type & ( GV_LINES ) ) {
gln->type = OGSF_LINE;
} else {
gln->type = OGSF_POLYGON;
/* Vect_append_point ( points, points->x[0], points->y[0], points->z[0] ); */
}
gln->npts = np = points->n_points;
G_debug(3, " np = %d", np);
if ( is3d ) {
gln->dims = 3;
if (NULL == (gln->p3=(Point3 *)calloc(np, sizeof(Point3)))) {
fprintf(stderr,"Can't calloc.\n"); /* CLEAN UP */
return(NULL);
}
#ifdef TRAK_MEM
Tot_mem+=(np*sizeof(Point3));
#endif
} else {
gln->dims = 2;
if (NULL == (gln->p2=(Point2 *)calloc(np, sizeof(Point2)))) {
fprintf(stderr,"Can't calloc.\n"); /* CLEAN UP */
return(NULL);
}
#ifdef TRAK_MEM
Tot_mem+=(np*sizeof(Point2));
#endif
}
for (i=0; i < np; i++) {
if ( is3d ) {
gln->p3[i][X] = points->x[i];
gln->p3[i][Y] = points->y[i];
gln->p3[i][Z] = points->z[i];
} else {
gln->p2[i][X] = points->x[i];
gln->p2[i][Y] = points->y[i];
}
}
/* Calc normal (should be average) */
if ( is3d && gln->type == OGSF_POLYGON ) {
vect[0][X] = (float) ( gln->p3[0][X] - gln->p3[1][X] );
vect[0][Y] = (float) ( gln->p3[0][Y] - gln->p3[1][Y] );
vect[0][Z] = (float) ( gln->p3[0][Z] - gln->p3[1][Z] );
vect[1][X] = (float) ( gln->p3[2][X] - gln->p3[1][X] );
vect[1][Y] = (float) ( gln->p3[2][Y] - gln->p3[1][Y] );
vect[1][Z] = (float) ( gln->p3[2][Z] - gln->p3[1][Z] );
GS_v3cross( vect[1], vect[0], gln->norm );
G_debug ( 3, "norm %f %f %f", gln->norm[0], gln->norm[1], gln->norm[2] );
}
if (NULL == (gln->next=(geoline *)malloc (sizeof(geoline)))) {
fprintf(stderr,"Can't malloc.\n"); /* CLEAN UP */
return(NULL);
}
#ifdef TRAK_MEM
Tot_mem+=sizeof(geoline);
#endif
prev = gln;
gln = gln->next;
nl++;
}
}
G_debug(3, "%d lines loaded", nl);
nl += nareas;
prev->next = NULL;
free(gln);
#ifdef TRAK_MEM
Tot_mem-=sizeof(geoline);
#endif
Vect_close (&map);
fprintf(stderr,"Vector file %s loaded.\n",grassname);
if (!nl) {
fprintf(stderr, "Error: No lines from %s fall within current region\n", grassname);
return (NULL);
}
*nlines = nl;
#ifdef TRAK_MEM
fprintf(stderr,"Total vect memory = %d Kbytes\n", Tot_mem/1000);
#endif
return(top);
}
void add_Vectmem(int plus)
{
#ifdef TRAK_MEM
{
Tot_mem+=plus;
}
#endif
return;
}
void sub_Vectmem(int minus)
{
#ifdef TRAK_MEM
{
Tot_mem-=minus;
}
#endif
return;
}
void show_Vectmem(void)
{
#ifdef TRAK_MEM
{
fprintf(stderr,"Total vect memory = %d Kbytes\n", Tot_mem/1000);
}
#endif
return;
}
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