Added pgm drawing and got light ray tracing working

Still needs correct light simulation and reflections

1 files changed, 56 insertions, 0 deletions

diff --git a/scene.c b/scene.c
new file mode 100644
index 0000000..a75b329
--- /dev/null
+++ b/scene.c
@@ -0,0 +1,56 @@
+#include "scene.h"
+
+#include <stdlib.h>
+
+static inline void link_object(space_t *s, object_t *o)
+{
+	if (s) {
+		o->next = s->objects;
+		s->objects = o;
+	} else {
+		o->next = 0;
+	}
+}
+
+object_t *add_sphere(space_t *s, vector_t *c, COORD_T r)
+{
+	object_t *o = (object_t *) malloc(sizeof(object_t));
+
+	o->type = TYPE_SPHERE;
+	o->sph.center = c;
+	o->sph.radius = r;
+
+	link_object(s, o);
+
+	return o;
+}
+
+object_t *add_plane(space_t *s, vector_t *start, vector_t *dir)
+{
+	object_t *o = (object_t *) malloc(sizeof(object_t));
+
+	o->type = TYPE_PLANE;
+	o->pl.start = start;
+	o->pl.norm = dir;
+
+	link_object(s, o);
+
+	return o;
+}
+
+light_t *add_light(space_t *s, vector_t *pos, color_t *c)
+{
+	light_t *o = (light_t *) malloc(sizeof(light_t));
+
+	o->pos = pos;
+	o->col = c;
+
+	if (s) {
+		o->next = s->lights;
+		s->lights = o;
+	} else {
+		o->next = NULL;
+	}
+
+	return o;
+}