WIP: world array is now an array of pointers to objects

Reviewed-on: #11

CMakeLists.txt

@@ -31,6 +31,6 @@ add_executable(
 	${SOURCE_C}
 	${SOURCE_CPP})
 
-target_link_libraries(${PROJECT} SDL2 SDL2_image SDL2_ttf)
+target_link_libraries(${PROJECT} SDL2 SDL2_image SDL2_ttf m)
 
 target_include_directories(${PROJECT} PRIVATE "${CMAKE_SOURCE_DIR}/include/" "${CMAKE_SOURCE_DIR}/src/corelib" "${CMAKE_SOURCE_DIR}/src/ui")

src/corelib/world.c

@@ -1,24 +1,46 @@
 #include "world.h"
+#include "memory.h"
 #include "math/vec.h"
 
-object_t g_objects[WORLD_NUM_OBJECTS];
+struct {
+	size_t num;
+	object_t** objects;
+} _world_objects = {
+	.num = 0,
+	.objects = NULL
+};
 
-void world_clear() {
-	for(int i = 0; i < WORLD_NUM_OBJECTS; ++i) {
-		g_objects[i].active = 0;
-		g_objects[i].enabled = 0;
+static inline
+int _expand_world() {
+	size_t new_num = _world_objects.num * 2;
+	object_t** new_list = realloc(_world_objects.objects, new_num * sizeof(object_t*));
+	if(new_list == NULL) {
+		return 0;
+	} else {
+		_world_objects.objects = new_list;
+		_world_objects.num = new_num;
+		return 1;
 	}
 }
 
+static inline
 object_t* _find_free_object() {
-	for(int i = 0; i < WORLD_NUM_OBJECTS; ++i) {
-		if(g_objects[i].active == 0) {
-			return g_objects + i;
+	for(int i = 0; i < _world_objects.num; ++i) {
+		if(_world_objects.objects[i]->active == 0) {
+			return _world_objects.objects[i];
 		}
 	}
+	_expand_world();
 	return NULL;
 }
 
+void world_clear() {
+	for(int i = 0; i < _world_objects.num; ++i) {
+		_world_objects.objects[i]->active = 0;
+		_world_objects.objects[i]->enabled = 0;
+	}
+}
+
 object_t* make_object() {
 	object_t* o = _find_free_object();
 	*o = object_default();

src/corelib/world.h

@@ -3,18 +3,21 @@
 
 #include "object.h"
 
-#define WORLD_NUM_OBJECTS 255
+#define BASE_WORLD_SIZE 24
 
 typedef struct object_t object_t;
 
-extern object_t g_objects[WORLD_NUM_OBJECTS];
+extern object_t* make_object();
+extern object_t* instantiate_object(const object_t* original);
 
-object_t* make_object();
-object_t* instantiate_object(const object_t* original);
+extern void world_clear();
 
-void world_clear();
+extern void world_update();
+extern void world_draw();
 
-void world_update();
-void world_draw();
+extern object_t* world_get_object(size_t at);
+
+extern size_t world_num_objects();
+extern void world_reserve_objects(size_t min);
 
 #endif /* _world_h */