diff --git a/src/world.c b/src/world.c
index 94d645a..56c53ee 100644
--- a/src/world.c
+++ b/src/world.c
@@ -45,6 +45,9 @@ static int mouseMovedInFrame;
 static double _mouseX;
 static double _mouseY;
 
+static int _mouseScrolledX;
+static int _mouseScrolledY;
+
 
 static const char* keyAliases[][2] = {
 	// as user asked  | as internally stored //
@@ -196,6 +199,10 @@ int mouseWentDown(const char *code)
 	{ return keyEventCheck(KEYEVENT_MOUSE_WENTDOWN, code); }
 int mouseWentUp(const char *code)
 	{ return keyEventCheck(KEYEVENT_MOUSE_WENTUP, code); }
+int mouseScrolledX()
+	{ return _mouseScrolledX; }
+int mouseScrolledY()
+	{ return _mouseScrolledY; }
 double mouseX()
 	{ return _mouseX; }
 double mouseY()
@@ -365,6 +372,7 @@ int askText(const char *question, char *answer, int maxAnswerSize)
 
 static void resetEvents() {
 	dialog.newText[0] = 0;
+	_mouseScrolledX = _mouseScrolledY = 0;
 	heliArrayClear(&keyEvents[KEYEVENT_KEY_WENTDOWN]);
 	heliArrayClear(&keyEvents[KEYEVENT_KEY_WENTUP]);
 	heliArrayClear(&keyEvents[KEYEVENT_MOUSE_WENTDOWN]);
@@ -556,6 +564,10 @@ static void handleEvent(SDL_Event *e) {
 		_mouseX = e->motion.x;
 		_mouseY = e->motion.y;
 	} else
+	if (e->type == SDL_MOUSEWHEEL) {
+		_mouseScrolledX += e->wheel.x;
+		_mouseScrolledY += e->wheel.y;
+	} else
 	if (e->type == SDL_TEXTINPUT) {
 		if (dialog.shown) {
 			int len = strlen(dialog.newText);
@@ -639,12 +651,11 @@ void worldRun() {
 		resetState();
 		heliDoTests();
 		
-		if (initCallback) {
-			viewportByWindow();
-			projectionByViewport();
-			heliDrawingPrepareFrame();
-			initCallback();
-		}
+		viewportByWindow();
+		projectionByViewport();
+		heliDrawingPrepareFrame();
+		
+		if (initCallback) initCallback();
 		run();
 		if (deinitCallback) deinitCallback();
 		
@@ -660,6 +671,7 @@ void worldRun() {
 		
 		deinit();
 		
+		_mouseScrolledX = _mouseScrolledY = 0;
 		for(int i = 0; i < keyEventsCount; ++i)
 			heliArrayDestroy(&keyEvents[i]);
 	}
diff --git a/src/world.h b/src/world.h
index 294a5be..c931c9b 100644
--- a/src/world.h
+++ b/src/world.h
@@ -30,6 +30,8 @@ int mouseDidMove();
 int mouseDown(const char *code);
 int mouseWentDown(const char *code);
 int mouseWentUp(const char *code);
+int mouseScrolledX();
+int mouseScrolledY();
 double mouseX();
 double mouseY();