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
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
|
/*
* The 3D Studio File Format Library
* Copyright (C) 1996-2007 by Jan Eric Kyprianidis <www.kyprianidis.com>
* All rights reserved.
*
* This program 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 program 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 program; if not, write to the Free Software Foundation,
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: atmosphere.c,v 1.12 2007/06/20 17:04:08 jeh Exp $
*/
#include <lib3ds/atmosphere.h>
#include <lib3ds/chunk.h>
#include <lib3ds/io.h>
/*!
* \defgroup atmosphere Atmosphere Settings
*/
static Lib3dsBool
fog_read(Lib3dsFog *fog, Lib3dsIo *io)
{
Lib3dsChunk c;
Lib3dsWord chunk;
if (!lib3ds_chunk_read_start(&c, LIB3DS_FOG, io)) {
return(LIB3DS_FALSE);
}
fog->near_plane = lib3ds_io_read_float(io);
fog->near_density=lib3ds_io_read_float(io);
fog->far_plane=lib3ds_io_read_float(io);
fog->far_density=lib3ds_io_read_float(io);
lib3ds_chunk_read_tell(&c, io);
while ((chunk=lib3ds_chunk_read_next(&c, io))!=0) {
switch (chunk) {
case LIB3DS_LIN_COLOR_F:
{
int i;
for (i=0; i<3; ++i) {
fog->col[i]=lib3ds_io_read_float(io);
}
}
break;
case LIB3DS_COLOR_F:
break;
case LIB3DS_FOG_BGND:
{
fog->fog_background=LIB3DS_TRUE;
}
break;
default:
lib3ds_chunk_unknown(chunk);
}
}
lib3ds_chunk_read_end(&c, io);
return(LIB3DS_TRUE);
}
static Lib3dsBool
layer_fog_read(Lib3dsLayerFog *fog, Lib3dsIo *io)
{
Lib3dsChunk c;
Lib3dsWord chunk;
Lib3dsBool have_lin=LIB3DS_FALSE;
if (!lib3ds_chunk_read_start(&c, LIB3DS_LAYER_FOG, io)) {
return(LIB3DS_FALSE);
}
fog->near_y=lib3ds_io_read_float(io);
fog->far_y=lib3ds_io_read_float(io);
fog->density=lib3ds_io_read_float(io);
fog->flags=lib3ds_io_read_dword(io);
lib3ds_chunk_read_tell(&c, io);
while ((chunk=lib3ds_chunk_read_next(&c, io))!=0) {
switch (chunk) {
case LIB3DS_LIN_COLOR_F:
lib3ds_io_read_rgb(io, fog->col);
have_lin=LIB3DS_TRUE;
break;
case LIB3DS_COLOR_F:
lib3ds_io_read_rgb(io, fog->col);
break;
default:
lib3ds_chunk_unknown(chunk);
}
}
lib3ds_chunk_read_end(&c, io);
return(LIB3DS_TRUE);
}
static Lib3dsBool
distance_cue_read(Lib3dsDistanceCue *cue, Lib3dsIo *io)
{
Lib3dsChunk c;
Lib3dsWord chunk;
if (!lib3ds_chunk_read_start(&c, LIB3DS_DISTANCE_CUE, io)) {
return(LIB3DS_FALSE);
}
cue->near_plane=lib3ds_io_read_float(io);
cue->near_dimming=lib3ds_io_read_float(io);
cue->far_plane=lib3ds_io_read_float(io);
cue->far_dimming=lib3ds_io_read_float(io);
lib3ds_chunk_read_tell(&c, io);
while ((chunk=lib3ds_chunk_read_next(&c, io))!=0) {
switch (chunk) {
case LIB3DS_DCUE_BGND:
{
cue->cue_background=LIB3DS_TRUE;
}
break;
default:
lib3ds_chunk_unknown(chunk);
}
}
lib3ds_chunk_read_end(&c, io);
return(LIB3DS_TRUE);
}
/*!
* \ingroup atmosphere
*/
Lib3dsBool
lib3ds_atmosphere_read(Lib3dsAtmosphere *atmosphere, Lib3dsIo *io)
{
Lib3dsChunk c;
if (!lib3ds_chunk_read(&c, io)) {
return(LIB3DS_FALSE);
}
switch (c.chunk) {
case LIB3DS_FOG:
{
lib3ds_chunk_read_reset(&c, io);
if (!fog_read(&atmosphere->fog, io)) {
return(LIB3DS_FALSE);
}
}
break;
case LIB3DS_LAYER_FOG:
{
lib3ds_chunk_read_reset(&c, io);
if (!layer_fog_read(&atmosphere->layer_fog, io)) {
return(LIB3DS_FALSE);
}
}
break;
case LIB3DS_DISTANCE_CUE:
{
lib3ds_chunk_read_reset(&c, io);
if (!distance_cue_read(&atmosphere->dist_cue, io)) {
return(LIB3DS_FALSE);
}
}
break;
case LIB3DS_USE_FOG:
{
atmosphere->fog.use=LIB3DS_TRUE;
}
break;
case LIB3DS_USE_LAYER_FOG:
{
atmosphere->fog.use=LIB3DS_TRUE;
}
break;
case LIB3DS_USE_DISTANCE_CUE:
{
atmosphere->dist_cue.use=LIB3DS_TRUE;
}
break;
}
return(LIB3DS_TRUE);
}
/*!
* \ingroup atmosphere
*/
Lib3dsBool
lib3ds_atmosphere_write(Lib3dsAtmosphere *atmosphere, Lib3dsIo *io)
{
if (atmosphere->fog.use) { /*---- LIB3DS_FOG ----*/
Lib3dsChunk c;
c.chunk=LIB3DS_FOG;
if (!lib3ds_chunk_write_start(&c,io)) {
return(LIB3DS_FALSE);
}
lib3ds_io_write_float(io, atmosphere->fog.near_plane);
lib3ds_io_write_float(io, atmosphere->fog.near_density);
lib3ds_io_write_float(io, atmosphere->fog.far_plane);
lib3ds_io_write_float(io, atmosphere->fog.far_density);
{
Lib3dsChunk c;
c.chunk=LIB3DS_COLOR_F;
c.size=18;
lib3ds_chunk_write(&c,io);
lib3ds_io_write_rgb(io, atmosphere->fog.col);
}
if (atmosphere->fog.fog_background) {
Lib3dsChunk c;
c.chunk=LIB3DS_FOG_BGND;
c.size=6;
lib3ds_chunk_write(&c,io);
}
if (!lib3ds_chunk_write_end(&c,io)) {
return(LIB3DS_FALSE);
}
}
if (atmosphere->layer_fog.use) { /*---- LIB3DS_LAYER_FOG ----*/
Lib3dsChunk c;
c.chunk=LIB3DS_LAYER_FOG;
c.size=40;
lib3ds_chunk_write(&c,io);
lib3ds_io_write_float(io, atmosphere->layer_fog.near_y);
lib3ds_io_write_float(io, atmosphere->layer_fog.far_y);
lib3ds_io_write_float(io, atmosphere->layer_fog.near_y);
lib3ds_io_write_dword(io, atmosphere->layer_fog.flags);
{
Lib3dsChunk c;
c.chunk=LIB3DS_COLOR_F;
c.size=18;
lib3ds_chunk_write(&c,io);
lib3ds_io_write_rgb(io, atmosphere->fog.col);
}
}
if (atmosphere->dist_cue.use) { /*---- LIB3DS_DISTANCE_CUE ----*/
Lib3dsChunk c;
c.chunk=LIB3DS_DISTANCE_CUE;
if (!lib3ds_chunk_write_start(&c,io)) {
return(LIB3DS_FALSE);
}
lib3ds_io_write_float(io, atmosphere->dist_cue.near_plane);
lib3ds_io_write_float(io, atmosphere->dist_cue.near_dimming);
lib3ds_io_write_float(io, atmosphere->dist_cue.far_plane);
lib3ds_io_write_float(io, atmosphere->dist_cue.far_dimming);
if (atmosphere->dist_cue.cue_background) {
Lib3dsChunk c;
c.chunk=LIB3DS_DCUE_BGND;
c.size=6;
lib3ds_chunk_write(&c,io);
}
if (!lib3ds_chunk_write_end(&c,io)) {
return(LIB3DS_FALSE);
}
}
if (atmosphere->fog.use) { /*---- LIB3DS_USE_FOG ----*/
Lib3dsChunk c;
c.chunk=LIB3DS_USE_FOG;
c.size=6;
lib3ds_chunk_write(&c,io);
}
if (atmosphere->layer_fog.use) { /*---- LIB3DS_USE_LAYER_FOG ----*/
Lib3dsChunk c;
c.chunk=LIB3DS_USE_LAYER_FOG;
c.size=6;
lib3ds_chunk_write(&c,io);
}
if (atmosphere->dist_cue.use) { /*---- LIB3DS_USE_DISTANCE_CUE ----*/
Lib3dsChunk c;
c.chunk=LIB3DS_USE_V_GRADIENT;
c.size=6;
lib3ds_chunk_write(&c,io);
}
return(LIB3DS_TRUE);
}
|
