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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
// SPDX-License-Identifier: LGPL-2.1-or-later
/* SPDX-FileCopyrightText: 2004-2015 Simon Wunderlich <sw@simonwunderlich.de>
*/
#include "s3d.h"
#include "s3dlib.h"
#include <g3d/g3d.h>
#include <g3d/matrix.h>
#include <stdlib.h> /* exit(), malloc() */
#include <math.h> /* sqrt() */
#include <string.h> /* strncpy() */
#include <errno.h> /* errno */
struct material2texture {
struct material2texture *next_ptr; /* pointer to next */
void *material_ptr;
void *texture_ptr;
int material_id;
int texture_id;
};
static struct material2texture *mat2tex_root = NULL;
#define MAXSTRN 20
static int model_load(char *file);
/** \brief read model from file
*
* Imports an 3d object file and returns the object number. Quite a number of
* formats are supported, like 3D Studio (.3ds, .prj), Lightwave (.lw, .lwb,
* .lwo), Quake Models (.md3), or simply everything libg3d supports. :)
*
* \remarks Of course, you won't forget to toggle it visible, won't you?
*/
int s3d_import_model_file(const char *fname)
{
char *buf, *ptr, *next;
char searchpath[1024];
char path[1024];
int oid;
if (fname == NULL) return -1;
#ifndef OBJSDIR
#define OBJSDIR ":./:../:../../:/usr/local/share/s3d/:/usr/share/s3d/"
#endif
strncpy(searchpath, OBJSDIR, 1023);
searchpath[1023] = 0; /* just in case */
next = ptr = searchpath;
while (next != NULL) {
next = NULL;
if (NULL != (next = strchr(ptr, ':'))) {
*next = 0; /* clear the delimiter */
next += 1; /* move to the beginner of the next dir */
}
if ((strlen(ptr) + strlen(fname)) < 1024) { /* only try if this fits */
strcpy(path, ptr); /* can use "unsafe" functions because size was verified above */
strcat(path, fname);
if (s3d_open_file(path, &buf) != -1) { /* found something */
free(buf); /* TODO: badbadbad ... */
if (-1 != (oid = model_load(path))) return oid;
}
}
if (next != NULL)
ptr = next; /* move pointer to the next position */
}
errds(LOW, "s3d_import_model_file()", "Could not open %s", fname);
return -1; /* nothing in search path ... */
}
static struct material2texture* get_mat2tex(struct material2texture **mat2tex, void *mat_ptr) {
while ((*mat2tex) != NULL) {
if ((*mat2tex)->material_ptr == mat_ptr) return *mat2tex;
mat2tex = &(*mat2tex)->next_ptr;
}
if ((*mat2tex) == NULL) {
(*mat2tex) = (struct material2texture *)malloc(sizeof(struct material2texture));
if ((*mat2tex) == NULL) {
errs("model_import()", "Sorry - you ran out of memory !\n");
exit(8);
}
(*mat2tex)->next_ptr = NULL;
(*mat2tex)->material_ptr = mat_ptr;
(*mat2tex)->texture_ptr = NULL;
(*mat2tex)->material_id = -1;
(*mat2tex)->texture_id = -1;
return *mat2tex;
}
return NULL;
}
static int model_load(char *file)
{
G3DContext *context;
G3DModel *model;
G3DObject *object;
G3DFace *face;
GSList *oitem, *oface;
G3DMatrix rmatrix[16];
struct material2texture *mat2tex;
unsigned int i, k;
int j, material_count, texture_count, voff, obj_id;
#define PMAX 100
uint32_t polybuf[PMAX * 4], npoly, oldflags;
float normalbuf[PMAX * 9], texcoordbuf[PMAX * 6];
float swaph; /* swap helper */
uint8_t *s3d_pixeldata = NULL;
context = g3d_context_new();
obj_id = -1;
model = g3d_model_load_full(context, file, 0);
if (model) {
g3d_matrix_identity(rmatrix);
g3d_matrix_rotate_xyz(G_PI * 90.0 / 180, 0.0, 0.0, rmatrix);
g3d_model_transform(model, rmatrix);
oitem = model->objects;
obj_id = s3d_new_object();
material_count = texture_count = voff = 0;
while (oitem) {
object = (G3DObject *)oitem->data;
/* push vertices */
for (i = 0; i < object->vertex_count; i++) {
/* 2. and 3. coord have to change places otherwise the object will be turned */
swaph = object->vertex_data[i * 3 + 2];
object->vertex_data[i * 3 + 2] = -object->vertex_data[i * 3 + 1];
object->vertex_data[i * 3 + 1] = swaph;
}
s3d_push_vertices(obj_id, object->vertex_data, object->vertex_count);
if (NULL == (oface = object->faces)) {
voff += object->vertex_count; /* increase vertex offset */
oitem = oitem->next;
continue;
}
npoly = 0;
oldflags = ((G3DFace *)(oface->data))->flags;
while (oface) {
face = (G3DFace *)oface->data;
mat2tex = get_mat2tex(&mat2tex_root, face->material);
if (mat2tex->material_id == -1) { /* create a new texture if nothing found */
s3d_push_material_a(obj_id, face->material->r, face->material->g, face->material->b, face->material->a,
face->material->specular[0], face->material->specular[1], face->material->specular[2], face->material->specular[3],
face->material->r, face->material->g, face->material->b, face->material->a);
mat2tex->material_id = material_count;
material_count++;
if (face->tex_image != NULL) {
/* reorder pixeldata - s3d wants rgba */
s3d_pixeldata = (uint8_t*)malloc(sizeof(uint8_t) * face->tex_image->width * face->tex_image->height * 32);
if (s3d_pixeldata == NULL) {
errs("model_load()", "Sorry - you ran out of memory !\n");
exit(8);
}
for (j = (face->tex_image->height - 1); j >= 0; j--) {
for (k = 0; k < face->tex_image->width; k++) {
s3d_pixeldata[(j * face->tex_image->width + k) * 4 + 0 ] = face->tex_image->pixeldata[(j * face->tex_image->width + k) * 4 + 2 ];
s3d_pixeldata[(j * face->tex_image->width + k) * 4 + 1 ] = face->tex_image->pixeldata[(j * face->tex_image->width + k) * 4 + 1 ];
s3d_pixeldata[(j * face->tex_image->width + k) * 4 + 2 ] = face->tex_image->pixeldata[(j * face->tex_image->width + k) * 4 + 0 ];
s3d_pixeldata[(j * face->tex_image->width + k) * 4 + 3 ] = face->tex_image->pixeldata[(j * face->tex_image->width + k) * 4 + 3 ];
}
}
s3d_push_texture(obj_id, face->tex_image->width, face->tex_image->height);
s3d_pep_material_texture(obj_id, texture_count);
s3d_load_texture(obj_id, texture_count, 0, 0, face->tex_image->width, face->tex_image->height, s3d_pixeldata);
free(s3d_pixeldata);
s3d_pixeldata = NULL;
mat2tex->texture_id = texture_count;
texture_count++;
}
}
if (face->flags != oldflags || npoly >= PMAX) {
/* push things so far */
s3d_push_polygons(obj_id, polybuf, npoly);
if (oldflags & G3D_FLAG_FAC_NORMALS) s3d_pep_polygon_normals(obj_id, normalbuf, npoly);
if (oldflags & G3D_FLAG_FAC_TEXMAP) s3d_pep_polygon_tex_coords(obj_id, texcoordbuf, npoly);
npoly = 0;
}
oldflags = face->flags;
/* add polygon to the polygon buffer */
polybuf[npoly*4+0] = face->vertex_indices[0] + voff;
polybuf[npoly*4+1] = face->vertex_indices[2] + voff;
polybuf[npoly*4+2] = face->vertex_indices[1] + voff;
polybuf[npoly*4+3] = mat2tex->material_id;
if (face->flags & G3D_FLAG_FAC_NORMALS) {
normalbuf[ npoly*9 + 0] = -face->normals[ 0 ];
normalbuf[ npoly*9 + 1] = -face->normals[ 2 ];
normalbuf[ npoly*9 + 2] = face->normals[ 1 ];
normalbuf[ npoly*9 + 3] = -face->normals[ 6 ];
normalbuf[ npoly*9 + 4] = -face->normals[ 8 ];
normalbuf[ npoly*9 + 5] = face->normals[ 7 ];
normalbuf[ npoly*9 + 6] = -face->normals[ 3 ];
normalbuf[ npoly*9 + 7] = -face->normals[ 5 ];
normalbuf[ npoly*9 + 8] = face->normals[ 4 ];
}
if (face->flags & G3D_FLAG_FAC_TEXMAP) {
texcoordbuf[ npoly*6 + 0] = face->tex_vertex_data[ 0 ];
texcoordbuf[ npoly*6 + 1] = face->tex_vertex_data[ 1 ];
texcoordbuf[ npoly*6 + 2] = face->tex_vertex_data[ 4 ];
texcoordbuf[ npoly*6 + 3] = face->tex_vertex_data[ 5 ];
texcoordbuf[ npoly*6 + 4] = face->tex_vertex_data[ 2 ];
texcoordbuf[ npoly*6 + 5] = face->tex_vertex_data[ 3 ];
}
npoly++;
oface = oface->next;
}
/* push the last packets in buffer */
if (npoly > 0) {
s3d_push_polygons(obj_id, polybuf, npoly);
if (oldflags & G3D_FLAG_FAC_NORMALS) s3d_pep_polygon_normals(obj_id, normalbuf, npoly);
if (oldflags & G3D_FLAG_FAC_TEXMAP) s3d_pep_polygon_tex_coords(obj_id, texcoordbuf, npoly);
}
voff += object->vertex_count; /* increase vertex offset */
oitem = oitem->next;
}
g3d_model_free(model);
}
g3d_context_free(context);
return obj_id;
}
|
