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, 18 insertions, 0 deletions

diff --git a/modules/ray/ray_light_emitter.h b/modules/ray/ray_light_emitter.h
new file mode 100644
index 0000000..3b5509e
--- /dev/null
+++ b/modules/ray/ray_light_emitter.h
@@ -0,0 +1,18 @@
+#ifndef _RAY_LIGHT_EMITTER_H
+#define _RAY_LIGHT_EMITTER_H
+
+#include "ray_object_point.h"
+#include "ray_object_sphere.h"
+
+typedef enum ray_light_emitter_type_t {
+	RAY_LIGHT_EMITTER_TYPE_SPHERE,
+	RAY_LIGHT_EMITTER_TYPE_POINT,
+} ray_light_emitter_type_t;
+
+typedef union ray_light_emitter_t {
+	ray_light_emitter_type_t	type;
+	ray_object_sphere_t		sphere;
+	ray_object_point_t		point;
+} ray_light_emitter_t;
+
+#endif