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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 <stdio.h>
#include <string.h>
#include <math.h>
#include <locale.h>
#include <g3d/g3d.h>
#include <g3d/stream.h>
/*****************************************************************************/
/* plugin interface */
/*****************************************************************************/
#define NFF_SEC_NOSECTION 0
#define NFF_SEC_VIEWPOINT 1
#define NFF_SEC_BGCOLOR 2
#define NFF_SEC_POSLIGHT 3
#define NFF_SEC_MATERIAL 4
#define NFF_SEC_CONECYL 5
#define NFF_SEC_SPHERE 6
#define NFF_SEC_POLYGON 7
#define NFF_SEC_POLPATCH 8
static gboolean nff_readline(G3DStream *stream, gchar *line, guint32 maxlen);
EAPI
gboolean plugin_load_model_from_stream(G3DContext *context, G3DStream *stream,
G3DModel *model, gpointer plugin_data)
{
gchar line[1024];
G3DObject *object;
G3DMaterial *material = NULL;
G3DFace *face;
guint32 section = NFF_SEC_NOSECTION;
G3DFloat r,g,b, Kd, Ks, Sh, T, refr;
G3DFloat v1,v2,v3, n1,n2,n3;
gint32 i, num, index;
gchar name[128];
setlocale(LC_NUMERIC, "C");
g_return_val_if_fail(model != NULL, FALSE);
object = g_new0(G3DObject, 1);
object->name = g_strdup("NFF Object");
model->objects = g_slist_append(model->objects, object);
while(nff_readline(stream, line, 1024)) {
if(strcmp(line, "v") == 0) {
section = NFF_SEC_VIEWPOINT;
} else if(sscanf(line, "b " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT, &r, &g, &b) == 3) {
g3d_context_set_bgcolor(context, r, g, b, 1.0);
} else if(sscanf(line, "f " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT,
&r, &g, &b, &Kd, &Ks, &Sh, &T, &refr) == 8) {
material = g3d_material_new();
material->r = r;
material->g = g;
material->b = b;
material->a = 1.0 - T;
material->shininess = Sh;
material->specular[0] = r * Ks;
material->specular[1] = g * Ks;
material->specular[2] = b * Ks;
if(T > 0) material->flags |= G3D_FLAG_MAT_TWOSIDE;
object->materials = g_slist_append(object->materials, material);
g_snprintf(name, 128, "material #%d",
g_slist_length(object->materials));
material->name = g_strdup(name);
} else if((sscanf(line, "pp %d", &num) == 1) ||
(sscanf(line, "p %d", &num) == 1)) {
face = g_new0(G3DFace, 1);
if(strncmp(line, "pp", 2) == 0) section = NFF_SEC_POLPATCH;
else section = NFF_SEC_POLYGON;
object->vertex_count += num;
object->vertex_data = g_realloc(object->vertex_data,
object->vertex_count * 3 * sizeof(G3DFloat));
face->material = material;
face->vertex_count = num;
face->vertex_indices = g_malloc0(num * sizeof(guint32));
object->faces = g_slist_prepend(object->faces, face);
if(section == NFF_SEC_POLPATCH) {
face->flags |= G3D_FLAG_FAC_NORMALS;
face->normals = g_malloc0(num * 3 * sizeof(G3DFloat));
}
/* most faces are in this direction, but there are wrong models */
for(i = num - 1; i >= 0; i --) {
if(!nff_readline(stream, line, 1024)) {
g_warning("reading vertices failed");
return FALSE;
}
if((section == NFF_SEC_POLPATCH) &&
(sscanf(line, G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT,
&v1,&v2,&v3,
&n1,&n2,&n3) == 6)) {
index = object->vertex_count - num + i;
object->vertex_data[index*3+0] = v1;
object->vertex_data[index*3+1] = v2;
object->vertex_data[index*3+2] = v3;
face->vertex_indices[i] = index;
face->normals[i*3+0] = -n1;
face->normals[i*3+1] = -n2;
face->normals[i*3+2] = -n3;
} else if(sscanf(line, G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT " " G3D_SCANF_FLOAT, &v1,&v2,&v3) == 3) {
index = object->vertex_count - num + i;
object->vertex_data[index*3+0] = v1;
object->vertex_data[index*3+1] = v2;
object->vertex_data[index*3+2] = v3;
face->vertex_indices[i] = index;
} else
g_warning("error in line '%s'", line);
}
}
}
return TRUE;
}
EAPI
gchar *plugin_description(G3DContext *context)
{
return g_strdup("Neutral File Format models.");
}
EAPI
gchar **plugin_extensions(G3DContext *context)
{
return g_strsplit("nff", ":", 0);
}
/*****************************************************************************/
/* private functions */
/*****************************************************************************/
static gboolean nff_readline(G3DStream *stream, gchar *line, guint32 maxlen)
{
if(g3d_stream_read_line(stream, line, maxlen) == NULL)
return FALSE;
g_strstrip(line);
if((strlen(line) == 0) || (line[0] == '#')) {
/* get next line if empty or comment */
return nff_readline(stream, line, maxlen);
}
return TRUE;
}
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