summaryrefslogtreecommitdiff
path: root/src/modules/ray/ray.c
blob: a0613e8ce45755a411f4c3ba08aa1b98ca0bdf41 (plain)
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
#include <stdint.h>
#include <inttypes.h>
#include <math.h>

#include "fb.h"
#include "rototiller.h"
#include "util.h"

#include "ray_camera.h"
#include "ray_object.h"
#include "ray_scene.h"
#include "ray_threads.h"

/* Copyright (C) 2016-2017 Vito Caputo <vcaputo@pengaru.com> */

/* ray trace a simple scene into the fragment */
static void ray_render_fragment(fb_fragment_t *fragment)
{
	static ray_object_t	objects[] = {
		{
			.plane = {
				.type = RAY_OBJECT_TYPE_PLANE,
				.surface = {
					.color = { .x = 0.6, .y = 0.3, .z = 0.8 },
					.diffuse = 1.0f,
					.specular = 0.2f,
					.highlight_exponent = 20.0f
				},
				.normal = { .x = 0.0, .y = 1.0, .z = 0.0 },
				.distance = 2.0f,
			}
		}, {
			.sphere = {
				.type = RAY_OBJECT_TYPE_SPHERE,
				.surface = {
					.color = { .x = 1.0, .y = 0.0, .z = 0.0 },
					.diffuse = 1.0f,
					.specular = 0.05f,
					.highlight_exponent = 20.0f
				},
				.center = { .x = 0.5, .y = 1.0, .z = 0.0 },
				.radius = 1.2f,
			}
		}, {
			.sphere = {
				.type = RAY_OBJECT_TYPE_SPHERE,
				.surface = {
					.color = { .x = 0.0, .y = 0.0, .z = 1.0 },
					.diffuse = 0.9f,
					.specular = 0.4f,
					.highlight_exponent = 20.0f
				},
				.center = { .x = -2.0, .y = 1.0, .z = 0.0 },
				.radius = 0.9f,
			}
		}, {
			.sphere = {
				.type = RAY_OBJECT_TYPE_SPHERE,
				.surface = {
					.color = { .x = 0.0, .y = 1.0, .z = 1.0 },
					.diffuse = 0.9f,
					.specular = 0.3f,
					.highlight_exponent = 20.0f
				},
				.center = { .x = 2.0, .y = -1.0, .z = 0.0 },
				.radius = 1.0f,
			}
		}, {
			.sphere = {
				.type = RAY_OBJECT_TYPE_SPHERE,
				.surface = {
					.color = { .x = 0.0, .y = 1.0, .z = 0.0 },
					.diffuse = 0.95f,
					.specular = 0.85f,
					.highlight_exponent = 1500.0f
				},
				.center = { .x = 0.2, .y = -1.25, .z = 0.0 },
				.radius = 0.6f,
			}
		}, {
			.light = {
				.type = RAY_OBJECT_TYPE_LIGHT,
				.brightness = 1.0,
				.emitter = {
					.point.type = RAY_LIGHT_EMITTER_TYPE_POINT,
					.point.center = { .x = 3.0f, .y = 3.0f, .z = 3.0f },
					.point.surface = {
						.color = { .x = 1.0f, .y = 1.0f, .z = 1.0f },
					},
				}
			}
		}
	};

	ray_camera_t		camera = {
					.position = { .x = 0.0, .y = 0.0, .z = 6.0 },
					.orientation = {
						.order = RAY_EULER_ORDER_YPR, /* yaw,pitch,roll */
						.yaw = RAY_EULER_DEGREES(0.0f),
						.pitch = RAY_EULER_DEGREES(0.0f),
						.roll = RAY_EULER_DEGREES(180.0f),
					},
					.focal_length = 700.0f,
					.width = fragment->width,
					.height = fragment->height,
				};

	static ray_scene_t	scene = {
					.objects = objects,
					.n_objects = nelems(objects),
					.lights = &objects[5],
					.n_lights = 1,
					.ambient_color = { .x = 1.0f, .y = 1.0f, .z = 1.0f },
					.ambient_brightness = .04f,
				};
	static int		initialized;
	static ray_threads_t	*threads;
	static fb_fragment_t	*fragments;
	static unsigned		ncpus;
#if 1
	/* animated point light source */
	static float		r;

	r += .02;

	scene.lights[0].light.emitter.point.center.x = cosf(r) * 4.5f;
	scene.lights[0].light.emitter.point.center.z = sinf(r * 3.0f) * 4.5f;

	/* move the camera in a circle */
	camera.position.x = sinf(r) * (cosf(r) * 2.0f + 5.0f);
	camera.position.z = cosf(r) * (cosf(r) * 2.0f + 5.0f);

	/* also move up and down */
	camera.position.y = cosf(r * 1.3f) * 4.0f + 2.08f;

	/* keep camera facing the origin */
	camera.orientation.yaw = r;

	/* tilt camera pitch in time with up and down movements, phase shifted appreciably */
	camera.orientation.pitch = sinf((M_PI * 1.5f) + r * 1.3f) * .6f + -.35f;
#endif

	if (!initialized) {
		initialized = 1;
		ncpus = get_ncpus();

		if (ncpus > 1) {
			threads = ray_threads_create(ncpus - 1);
			fragments = malloc(sizeof(fb_fragment_t) * ncpus);
		}
	}

	if (ncpus > 1) {
		/* Always recompute the fragments[] geometry.
		 * This way the fragment geometry can change at any moment and things will
		 * continue functioning, which may prove important later on.
		 * (imagine things like a preview window, or perhaps composite modules
		 * which call on other modules supplying virtual fragments of varying dimensions..)
		 */
		fb_fragment_divide(fragment, ncpus, fragments);
	} else {
		fragments = fragment;
	}

	ray_scene_render_fragments(&scene, &camera, threads, fragments);
}


rototiller_module_t	ray_module = {
	.render_fragment = ray_render_fragment,
	.name = "ray",
	.description = "Multi-threaded ray tracer",
	.author = "Vito Caputo <vcaputo@pengaru.com>",
	.license = "GPLv2",
};
© All Rights Reserved