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
|
/*
* vp_renderR.c
*
* Function to render raw (unclassified) volumes.
*
* Copyright (c) 1994 The Board of Trustees of The Leland Stanford
* Junior University. All rights reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation for any purpose is hereby granted without fee, provided
* that the above copyright notice and this permission notice appear in
* all copies of this software and that you do not sell the software.
* Commercial licensing is available by contacting the author.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* Author:
* Phil Lacroute
* Computer Systems Laboratory
* Electrical Engineering Dept.
* Stanford University
*/
/*
* $Date: 1994/12/30 23:52:38 $
* $Revision: 1.23 $
*/
#include "vp_global.h"
#define COMP_AR1PB_FUNC VPCompAR1PB
extern void VPCompAR1PB();
#define COMP_AR3PB_FUNC VPCompAR3PB
extern void VPCompAR3PB();
#ifdef COMP_AR11B
#define COMP_AR11B_FUNC VPCompAR11B
extern void VPCompAR11B();
#else
#define COMP_AR11B_FUNC VPCompAR1NB
#endif
#ifdef COMP_AR31B
#define COMP_AR31B_FUNC VPCompAR31B
extern void VPCompAR31B();
#else
#define COMP_AR31B_FUNC VPCompAR3NB
#endif
#ifdef COMP_AR12B
#define COMP_AR12B_FUNC VPCompAR12B
extern void VPCompAR12B();
#else
#define COMP_AR12B_FUNC VPCompAR1NB
#endif
#ifdef COMP_AR32B
#define COMP_AR32B_FUNC VPCompAR32B
extern void VPCompAR32B();
#else
#define COMP_AR32B_FUNC VPCompAR3NB
#endif
#define COMP_AR1NB_FUNC VPCompAR1NB
extern void VPCompAR1NB();
#define COMP_AR3NB_FUNC VPCompAR3NB
extern void VPCompAR3NB();
#define COMP_AR1PS_FUNC VPCompAR1PB
#define COMP_AR3PS_FUNC VPCompAR3PB
#ifdef COMP_AR11S
#define COMP_AR11S_FUNC VPCompAR11S
extern void VPCompAR11S();
#else
#define COMP_AR11S_FUNC VPCompAR1NS
#endif
#ifdef COMP_AR31S
#define COMP_AR31S_FUNC VPCompAR31S
extern void VPCompAR31S();
#else
#define COMP_AR31S_FUNC VPCompAR3NS
#endif
#ifdef COMP_AR12S
#define COMP_AR12S_FUNC VPCompAR12S
extern void VPCompAR12S();
#else
#define COMP_AR12S_FUNC VPCompAR1NS
#endif
#ifdef COMP_AR32S
#define COMP_AR32S_FUNC VPCompAR32S
extern void VPCompAR32S();
#else
#define COMP_AR32S_FUNC VPCompAR3NS
#endif
#define COMP_AR1NS_FUNC VPCompAR1NS
extern void VPCompAR1NS();
#define COMP_AR3NS_FUNC VPCompAR3NS
extern void VPCompAR3NS();
#ifdef INDEX_VOLUME
extern void VPCompAI11B();
#endif
#define SHADOWS_OFF 0
#define SHADOWS_ON 1
#define SHADOW_OPTS 2
#define MATERIAL_CALLBACK 0
#define MATERIAL_ONE 1
#define MATERIAL_TWO 2
#define MATERIAL_MORE 3
#define MATERIAL_OPTS 4
#define COLOR_GRAY 0
#define COLOR_RGB 1
#define COLOR_OPTS 2
static void (*AffineProcTable[SHADOW_OPTS][MATERIAL_OPTS][COLOR_OPTS])() = {
{
{ COMP_AR1PB_FUNC, COMP_AR3PB_FUNC },
{ COMP_AR11B_FUNC, COMP_AR31B_FUNC },
{ COMP_AR12B_FUNC, COMP_AR32B_FUNC },
{ COMP_AR1NB_FUNC, COMP_AR3NB_FUNC }
},
{
{ COMP_AR1PS_FUNC, COMP_AR3PS_FUNC },
{ COMP_AR11S_FUNC, COMP_AR31S_FUNC },
{ COMP_AR12S_FUNC, COMP_AR32S_FUNC },
{ COMP_AR1NS_FUNC, COMP_AR3NS_FUNC }
}
};
/*
* vpRenderRawVolume
*
* Render an uclassified volume using the shear-warp algorithm.
*/
vpResult
vpRenderRawVolume(vpc)
vpContext *vpc;
{
int retcode;
void (*composite_func)();
int shadow_option, material_option, color_option;
/* check for errors and initialize */
if ((retcode = VPCheckRawVolume(vpc)) != VP_OK)
return(retcode);
if ((retcode = VPCheckClassifier(vpc)) != VP_OK)
return(retcode);
if ((retcode = VPCheckShader(vpc)) != VP_OK)
return(retcode);
if ((retcode = VPCheckImage(vpc)) != VP_OK)
return(retcode);
if (vpc->num_clsfy_params > 2)
return(VPSetError(vpc, VPERROR_LIMIT_EXCEEDED));
if ((retcode = VPFactorView(vpc)) != VP_OK)
return(retcode);
Debug((vpc, VPDEBUG_RENDER, "Algorithm: affine RAWvolume (%s)\n",
vpc->mm_octree == NULL ? "no octree" : "with octree"));
/* determine which options are enabled */
if (vpc->enable_shadows)
shadow_option = SHADOWS_ON;
else
shadow_option = SHADOWS_OFF;
if (vpc->shading_mode == CALLBACK_SHADER)
material_option = MATERIAL_CALLBACK;
else if (vpc->num_materials == 1)
material_option = MATERIAL_ONE;
else if (vpc->num_materials == 2)
material_option = MATERIAL_TWO;
else
material_option = MATERIAL_MORE;
if (vpc->color_channels == 1)
color_option = COLOR_GRAY;
else
color_option = COLOR_RGB;
/* render */
if (vpc->affine_view) {
/* choose a compositing function */
composite_func = AffineProcTable[shadow_option][material_option]
[color_option];
VPRenderAffine(vpc, USE_RAWVOLUME, composite_func);
} else {
/* XXX perspective rendering not available yet */
return(VPSetError(vpc, VPERROR_BAD_OPTION));
}
return(VP_OK);
}
|
