1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
/* $Id$ */
/*
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);
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;
gfloat r,g,b, Kd, Ks, Sh, T, refr;
gfloat 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 %g %g %g", &r, &g, &b) == 3) {
g3d_context_set_bgcolor(context, r, g, b, 1.0);
} else if(sscanf(line, "f %g %g %g %g %g %g %g %g",
&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(gfloat));
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(gfloat));
}
/* 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, "%g %g %g %g %g %g",
&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, "%g %g %g", &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;
}
gchar *plugin_description(G3DContext *context)
{
return g_strdup(
"Neutral File Format import plugin\n");
}
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;
}
|
