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/* $Id$ */
/*
libg3d - 3D object loading library
Copyright (C) 2005-2009 Markus Dahms <mad@automagically.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <locale.h>
#include <glib.h>
#include <g3d/types.h>
#include "imp_acf_airfoil.h"
static AcfAirfoil *acf_airfoil_read(const gchar *path);
AcfAirfoilDb *acf_airfoil_init(void)
{
AcfAirfoilDb *db;
AcfAirfoil *afl;
GDir *dir;
const gchar *dirname, *filename;
gchar *path;
GError *error = NULL;
setlocale(LC_NUMERIC, "C");
dirname = g_getenv("AIRFOIL_DIR");
if(!(dirname && g_file_test(dirname, G_FILE_TEST_IS_DIR))) {
#if DEBUG > 0
g_warning("ACF: could not load airfoils");
#endif
return NULL;
}
dir = g_dir_open(dirname, 0, &error);
if(error != NULL) {
g_warning("ACF: failed to open airfoil directory '%s': %s",
dirname, error->message);
g_error_free(error);
return NULL;
}
db = g_new0(AcfAirfoilDb, 1);
db->db = g_hash_table_new(g_str_hash, g_str_equal);
filename = g_dir_read_name(dir);
while(filename != NULL) {
if(strcmp(filename + strlen(filename) - 4, ".dat") == 0) {
path = g_strdup_printf("%s%c%s", dirname, G_DIR_SEPARATOR,
filename);
afl = acf_airfoil_read(path);
g_free(path);
if(afl != NULL) {
g_hash_table_insert(db->db, afl->filename, afl);
db->airfoils = g_slist_append(db->airfoils, afl);
#if DEBUG > 2
g_debug("ACF: airfoil %s loaded", filename);
#endif
}
}
filename = g_dir_read_name(dir);
}
#if DEBUG > 0
g_debug("ACF: %d airfoils loaded", g_slist_length(db->airfoils));
#endif
g_dir_close(dir);
return db;
}
void acf_airfoil_free(AcfAirfoil *afl)
{
if(afl->filename)
g_free(afl->filename);
if(afl->description)
g_free(afl->description);
if(afl->vertex_data)
g_free(afl->vertex_data);
g_free(afl);
}
void acf_airfoil_cleanup(AcfAirfoilDb *db)
{
AcfAirfoil *afl;
GSList *item;
g_hash_table_destroy(db->db);
item = db->airfoils;
while(item) {
afl = item->data;
item = g_slist_remove(item, afl);
acf_airfoil_free(afl);
}
g_free(db);
}
AcfAirfoil *acf_airfoil_lookup(AcfAirfoilDb *db, const gchar *aflname)
{
return g_hash_table_lookup(db->db, aflname);
}
static AcfAirfoil *acf_airfoil_read(const gchar *path)
{
AcfAirfoil *afl;
FILE *f;
gchar buffer[BUFSIZ + 1];
guint32 off;
G3DFloat x, y;
f = fopen(path, "r");
if(f == NULL)
return NULL;
afl = g_new0(AcfAirfoil, 1);
fgets(buffer, BUFSIZ, f);
buffer[BUFSIZ] = '\0';
g_strstrip(buffer);
afl->filename = g_path_get_basename(path);
afl->description = g_strdup(buffer);
while(!feof(f)) {
memset(buffer, '\0', BUFSIZ + 1);
fgets(buffer, BUFSIZ, f);
g_strstrip(buffer);
if(strlen(buffer) == 0)
continue;
if(sscanf(buffer, G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT, &x, &y) == 2) {
if((x < 0.0) || (x > 1.0))
continue;
off = afl->vertex_count;
afl->vertex_count ++;
afl->vertex_data = g_realloc(afl->vertex_data,
afl->vertex_count * 2 * sizeof(G3DFloat));
afl->vertex_data[off * 2 + 0] = x;
afl->vertex_data[off * 2 + 1] = y;
} else {
#if DEBUG > 2
g_debug("ACF: airfoil: failed to parse line in %s: %s",
afl->filename, buffer);
#endif
}
}
fclose(f);
return afl;
}
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