Code for objects and spheres

src/object.c

@@ -6,10 +6,104 @@
  */
 
 
+#include <assert.h>
+#include <stdlib.h>
+#include "basics.h"
 #include "object.h"
 
 
-struct _Object
-{
-    int type;
+struct _Object {
+    ObjectType type;
+    Vector3 location;
+    void *shape;
 };
+
+typedef struct _Sphere {
+    float radius;
+} Sphere;
+
+
+/*
+ * object_init ---
+ *
+ * Create a new object of the given type.
+ */
+Object *
+object_init(ObjectType type)
+{
+    Object *obj = malloc(sizeof(Object));
+    if (obj == NULL) {
+        return NULL;
+    }
+
+    switch (type) {
+        case ObjectTypeSphere:
+            obj->shape = malloc(sizeof(Sphere));
+            break;
+        default:
+            assert(0);
+    }
+
+    return obj;
+}
+
+
+/*
+ * object_destroy --
+ *
+ * Destroy the given object.
+ */
+void
+object_destroy(Object *obj)
+{
+    assert(obj != NULL);
+    assert(obj->shape != NULL);
+
+    free(obj->shape);
+    free(obj);
+}
+
+
+/*
+ * object_get_location --
+ * object_set_location --
+ *
+ * Get and set the location of the object.
+ */
+Vector3
+object_get_location(Object *obj)
+{
+    assert(obj != NULL);
+    return obj->location;
+}
+
+void
+object_set_location(Object *obj, Vector3 location)
+{
+    assert(obj != NULL);
+    obj->location = location;
+}
+
+/*
+ * Sphere functions
+ */
+
+/*
+ * object_sphere_get_radius --
+ * object_sphere_set_radius --
+ *
+ * Get and set the radius of a Sphere object.
+ */
+float
+object_sphere_get_radius(Object *obj)
+{
+    assert(obj != NULL && obj->type == ObjectTypeSphere);
+    return ((Sphere *)obj->shape)->radius;
+}
+
+void
+object_sphere_set_radius(Object *obj, float r)
+{
+    assert(obj != NULL && obj->type == ObjectTypeSphere);
+    ((Sphere *)obj->shape)->radius = r;
+}

src/object.h

@@ -9,8 +9,25 @@
 #ifndef __OBJECT_H
 #define __OBJECT_H
 
+#include "basics.h"
+
+
+typedef enum {
+    ObjectTypeSphere = 1,
+} ObjectType;
 
 typedef struct _Object Object;
 
 
+Object *object_init(ObjectType type);
+void object_destroy(Object *obj);
+
+Vector3 object_get_location(Object *obj);
+void object_set_location(Object *obj, Vector3 location);
+
+// Sphere methods
+float object_sphere_get_radius(Object *obj);
+void object_sphere_set_radius(Object *obj, float r);
+
+
 #endif