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
|
//
// Created by Keuin on 2022/4/11.
//
#include <cstdint>
#include <iostream>
#include <vector>
#include <memory>
#include <cstdlib>
#include "vec.h"
#include "timer.h"
#include "viewport.h"
#include "hitlist.h"
#include "sphere.h"
#include "aa.h"
#include "material_diffusive.h"
#include "material_reflective.h"
#include "material_dielectric.h"
// Select the scene to render
//#define SCENE_DIFFUSE
//#define SCENE_REFLECT
#define SCENE_DIALECT
//#define SCENE_FOV
//#define SCENE_FREECAM
#ifdef SCENE_FOV
#define NO_DEFAULT_CAM
#endif
#ifdef SCENE_FREECAM
#define NO_DEFAULT_CAM
#endif
static constexpr uint64_t default_diffuse_seed = 123456789012345678ULL;
// T: color depth, V: pos
template<typename T, typename V>
void generate_image(uint16_t image_width, uint16_t image_height, double viewport_width, double focal_length,
double sphere_z, double sphere_r, unsigned samples, const std::string &caption = "",
unsigned caption_scale = 1) {
if (samples == 1) {
std::cerr << "Antialiasing is disabled." << std::endl;
} else {
std::cerr << "Antialiasing Samples: " << samples << std::endl;
}
std::cerr << "Initializing context..." << std::endl;
double r = 1.0 * image_width / image_height;
hitlist world;
#ifndef NO_DEFAULT_CAM
////////////////
// noaa rendering
bias_ctx no_bias{};
basic_viewport<T, V> vp_noaa{
vec3<V>::zero(), // camera position as the coordinate origin
vec3d{0, 0, -focal_length},
image_width, image_height,
viewport_width / 2.0, ((double) image_height / image_width) * viewport_width / 2.0,
world
};
////////////////
////////////////
// aa rendering
aa_viewport<T, V> vp_aa{
vec3<V>::zero(), // camera position as the coordinate origin
vec3d{0, 0, -focal_length},
image_width, image_height,
viewport_width / 2.0, ((double) image_height / image_width) * viewport_width / 2.0,
world, samples
};
////////////////
#endif
#ifdef SCENE_FOV
// This scene needs custom viewport setting
const auto fov_h = 2 * asin((double)1.0 / 3.0);
////////////////
// noaa rendering
bias_ctx no_bias{};
basic_viewport<T, V> vp_noaa{
{0, 0, 1}, // camera position as the coordinate origin
{0, 0, 0},
image_width, image_height,
fov_h,
world
};
////////////////
////////////////
// aa rendering
aa_viewport<T, V> vp_aa{
{0, 0, 1}, // camera position as the coordinate origin
{0, 0, 0},
image_width, image_height,
fov_h,
world, samples
};
////////////////
material_diffuse_lambertian materi{0.5};
world.add_object(std::make_shared<sphere>(vec3d{0, 0, -2}, 1, materi));
#endif
#ifdef SCENE_FREECAM
// This scene needs custom viewport setting
const auto fov_h = 121.28449291441746 * (M_PI / 180.0);
////////////////
// noaa rendering
bias_ctx no_bias{};
basic_viewport<T, V> vp_noaa{
{-2,2,1}, // camera position as the coordinate origin
{0,0,-1},
image_width, image_height,
fov_h,
world
};
////////////////
////////////////
// aa rendering
aa_viewport<T, V> vp_aa{
{-2,2,1}, // camera position as the coordinate origin
{0,0,-1},
image_width, image_height,
fov_h,
world, samples
};
////////////////
material_diffuse_lambertian m_ground{{0.8, 0.8, 0.0}};
material_diffuse_lambertian m_ball_center{{0.7, 0.3, 0.3}};
material_dielectric m_ball_left{1.5};
material_reflective m_ball_right{{0.8, 0.6, 0.2}};
// the earth
world.add_object(std::make_shared<sphere>(vec3d{0.0, -100.5, -1.0}, 100.0, m_ground));
// three balls
world.add_object(std::make_shared<sphere>(vec3d{-1.0, 0.0, -1.0}, 0.5, m_ball_left));
world.add_object(std::make_shared<sphere>(vec3d{-1.0, 0.0, -1.0}, -0.45, m_ball_left));
world.add_object(std::make_shared<sphere>(vec3d{0.0, 0.0, -1.0}, 0.5, m_ball_center));
world.add_object(std::make_shared<sphere>(vec3d{1.0, 0.0, -1.0}, 0.5, m_ball_right));
#endif
#ifdef SCENE_DIFFUSE
material_diffuse_lambertian materi{0.5};
world.add_object(std::make_shared<sphere>(
vec3d{0, -100.5, -1},
100, materi)); // the earth
world.add_object(std::make_shared<sphere>(vec3d{0, 0, sphere_z}, sphere_r, materi));
#endif
#ifdef SCENE_REFLECT
material_diffuse_lambertian m_ground{{0.8, 0.8, 0.0}};
material_diffuse_lambertian m_ball_center{{0.7, 0.3, 0.3}};
material_fuzzy_reflective m_ball_left{{0.8, 0.8, 0.8}, 1.0};
material_reflective m_ball_right{{0.8, 0.6, 0.2}};
// the earth
world.add_object(std::make_shared<sphere>(vec3d{0.0, -100.5, -1.0}, 100.0, m_ground));
// three balls
world.add_object(std::make_shared<sphere>(vec3d{-1.0, 0.0, -1.0}, 0.5, m_ball_left));
world.add_object(std::make_shared<sphere>(vec3d{0.0, 0.0, -1.0}, 0.5, m_ball_center));
world.add_object(std::make_shared<sphere>(vec3d{1.0, 0.0, -1.0}, 0.5, m_ball_right));
#endif
#ifdef SCENE_DIALECT
material_diffuse_lambertian m_ground{{0.8, 0.8, 0.0}};
material_diffuse_lambertian m_ball_center{{0.7, 0.3, 0.3}};
material_dielectric m_ball_left{1.5};
material_reflective m_ball_right{{0.8, 0.6, 0.2}};
// the earth
world.add_object(std::make_shared<sphere>(vec3d{0.0, -100.5, -1.0}, 100.0, m_ground));
// three balls
world.add_object(std::make_shared<sphere>(vec3d{-1.0, 0.0, -1.0}, 0.5, m_ball_left));
world.add_object(std::make_shared<sphere>(vec3d{0.0, 0.0, -1.0}, 0.5, m_ball_center));
world.add_object(std::make_shared<sphere>(vec3d{1.0, 0.0, -1.0}, 0.5, m_ball_right));
#endif
timer tm;
std::cerr << "Rendering..." << std::endl;
tm.start_measure();
auto image = ((samples == 1) ? vp_noaa.render(default_diffuse_seed, no_bias) : vp_aa.render());
tm.stop_measure();
std::cerr << "Applying gamma2..." << std::endl;
tm.start_measure();
image = image.gamma2(); // gamma correction
tm.stop_measure();
if (!caption.empty()) {
image.print(caption,
pixel<T>::from_normalized(1.0, 0.0, 0.0),
10, 10, text_policy::newline, caption_scale, 0.8);
}
const auto image8b = bitmap8b::from<T>(image);
if (!std::getenv("NOPRINT")) {
image8b.write_plain_ppm(std::cout);
} else {
std::cerr << "NOPRINT is defined. PPM Image won't be printed." << std::endl;
}
}
int main(int argc, char **argv) {
if (argc != 8 && argc != 9) {
printf("Usage: %s <image_width> <image_height> <viewport_width> <focal_length> <sphere_z> <sphere_r> <samples> [<caption>]\n",
argv[0]);
return 0;
}
#ifndef NDEBUG
std::cerr << "Notice: assertion is enabled." << std::endl;
#else
std::cerr << "Notice: assertion is disabled." << std::endl;
#endif
std::string iw{argv[1]}, ih{argv[2]}, vw{argv[3]}, fl{argv[4]},
sz{argv[5]}, sr{argv[6]}, sp{argv[7]}, cap{};
if (argc == 9) {
// with caption
cap = std::string{argv[8]};
}
const auto image_width = std::stoul(iw);
generate_image<uint16_t, double>(image_width, std::stoul(ih),
std::stod(vw), std::stod(fl),
std::stod(sz), std::stod(sr),
std::stoul(sp), cap,
std::max((int) (1.0 * image_width * 0.010 / 8), 1));
}
|
