1 files changed, 161 insertions, 0 deletions
diff --git a/modules/ray/ray.c b/modules/ray/ray.c
new file mode 100644
index 0000000..60d08cf
--- /dev/null
+++ b/modules/ray/ray.c
@@ -0,0 +1,161 @@
+#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 Vito Caputo <vcaputo@pengaru.com> */
+
+/* ray trace a simple scene into the fragment */
+static void ray(fb_fragment_t *fragment)
+{
+	static ray_object_t	objects[] = {
+		{
+			.plane = {
+				.type = RAY_OBJECT_TYPE_PLANE,
+				.surface = {
+					.color = { .x = 0.4, .y = 0.2, .z = 0.5 },
+					.diffuse = 1.0f,
+					.specular = 0.2f,
+				},
+				.normal = { .x = 0.0, .y = 1.0, .z = 0.0 },
+				.distance = -3.2f,
+			}
+		}, {
+			.sphere = {
+				.type = RAY_OBJECT_TYPE_SPHERE,
+				.surface = {
+					.color = { .x = 1.0, .y = 0.0, .z = 0.0 },
+					.diffuse = 1.0f,
+					.specular = 0.05f,
+				},
+				.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 = 1.0f,
+					.specular = 1.0f,
+				},
+				.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 = 1.0f,
+					.specular = 1.0f,
+				},
+				.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 = 1.0f,
+					.specular = 1.0f,
+				},
+				.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 = {
+						.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 double		r;
+
+	r += .02;
+
+	scene.lights[0].light.emitter.point.center.x = cosf(r) * 3.5f;
+	scene.lights[0].light.emitter.point.center.z = sinf(r) * 3.5f;
+	camera.orientation.yaw = sinf(r) / 4;
+	camera.orientation.pitch = sinf(r * 10) / 100;
+	camera.orientation.roll = RAY_EULER_DEGREES(180.0f) + cosf(r) / 10;
+	camera.position.x = cosf(r) / 10;
+	camera.position.z = 4.0f + sinf(r) / 10;
+#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_renderer_t	ray_renderer = {
+	.render = ray,
+	.name = "ray",
+	.description = "Multi-threaded ray tracer",
+	.author = "Vito Caputo <vcaputo@pengaru.com>",
+	.license = "GPLv2",
+};