ray: introduce a rudimentary ray tracer

My first ray tracer, it only has spheres, planes, and point light sources.

No texture mapping, no soft shadows, no global illumination.

This is all very basic right now, the camera movement is simple and boring, but
sufficient for further development and optimization.

I made some effort to support multiple CPUs, it should detect the number of
CPUs in the system and use enough pthreads to keep them busy.

Jacco Bikker's tutorial on flipcode was the original impetus to do this, and
definitely served as a guide early on.

1 files changed, 27 insertions, 0 deletions

diff --git a/modules/ray/ray_scene.h b/modules/ray/ray_scene.h
new file mode 100644
index 0000000..e9781c6
--- /dev/null
+++ b/modules/ray/ray_scene.h
@@ -0,0 +1,27 @@
+#ifndef _RAY_SCENE_H
+#define _RAY_SCENE_H
+
+#include "fb.h"
+
+#include "ray_camera.h"
+#include "ray_color.h"
+#include "ray_ray.h"
+#include "ray_threads.h"
+
+typedef union ray_object_t ray_object_t;
+
+typedef struct ray_scene_t {
+	ray_object_t	*objects;
+	unsigned	n_objects;
+
+	ray_object_t	*lights;
+	unsigned	n_lights;
+
+	ray_color_t	ambient_color;
+	float		ambient_brightness;
+} ray_scene_t;
+
+void ray_scene_render_fragments(ray_scene_t *scene, ray_camera_t *camera, ray_threads_t *threads, fb_fragment_t *fragments);
+void ray_scene_render_fragment(ray_scene_t *scene, ray_camera_t *camera, fb_fragment_t *fragment);
+
+#endif