Add ObjectList struct

src/scene.c

@@ -8,9 +8,18 @@
 
 #include <math.h>
 #include <stdlib.h>
+
+#include "object.h"
 #include "scene.h"
 
 
+struct _ObjectList
+{
+    Object *object;
+    ObjectList *next;
+};
+
+
 Color _scene_trace(Scene *scene, const Ray ray, const int depth);
 
 

src/scene.h

@@ -12,12 +12,16 @@
 #include "basics.h"
 #include "camera.h"
 
+typedef struct _ObjectList ObjectList;
+
 
 typedef struct _Scene
 {
     int height, width;      /* Pixel dimensions. */
     Camera *camera;
 
+    ObjectList *objects;
+
     int is_rendered;
     Color *pixels;
 } Scene;