ray: split object render from object description

This moves the per-object _prepared state into ray_render_object_$type
structs with all the rendering-related object methods switched to
operate on the new render structs.

Since the current rendering code just makes all these assumptions
about light objects being point lights, I've just dropped all the
stuff associated with rendering light objects for now.  I think it
will be refactored a bit later on when the rendering code stops
hard-coding the point light stuff.

These changes open up the possibility of constifying the scene and
constituent objects, now that rendering doesn't shove the prepared
state into the embedded _prepared object substructs.

1 files changed, 45 insertions, 0 deletions

diff --git a/src/modules/ray/ray_render_object_point.h b/src/modules/ray/ray_render_object_point.h
new file mode 100644
index 0000000..43e48a1
--- /dev/null
+++ b/src/modules/ray/ray_render_object_point.h
@@ -0,0 +1,45 @@
+#ifndef _RAY_RENDER_OBJECT_POINT_H
+#define _RAY_RENDER_OBJECT_POINT_H
+
+#include "ray_3f.h"
+#include "ray_camera.h"
+#include "ray_object_point.h"
+#include "ray_object_type.h"
+#include "ray_ray.h"
+#include "ray_surface.h"
+
+
+typedef struct ray_render_object_point_t {
+	ray_object_point_t	object;
+} ray_render_object_point_t;
+
+
+static ray_render_object_point_t ray_render_object_point_prepare(ray_object_point_t *point, ray_camera_t *camera)
+{
+	ray_render_object_point_t	prepared = { .object = *point };
+
+	return prepared;
+}
+
+
+static inline int ray_render_object_point_intersects_ray(ray_render_object_point_t *point, unsigned depth, ray_ray_t *ray, float *res_distance)
+{
+	/* TODO: determine a ray:point intersection */
+	return 0;
+}
+
+
+static inline ray_3f_t ray_render_object_point_normal(ray_render_object_point_t *point, ray_3f_t *_point)
+{
+	ray_3f_t	normal;
+
+	return normal;
+}
+
+
+static inline ray_surface_t ray_render_object_point_surface(ray_render_object_point_t *point, ray_3f_t *_point)
+{
+	return point->object.surface;
+}
+
+#endif