simpler event loop

Lesson10.c

@@ -421,34 +421,42 @@ bool CreateGLWindow(char *title, int width, int height, int bits, bool fullscree
 	return true;                                        // Success
 }
 
-void WndProc(SDL_Event *uMsg)
+
+bool done = false;  // Bool Variable To Exit Loop
+
+void WndProc(SDL_Event *event)
 {
-	switch (uMsg->type)                                             // Check For Windows Messages
+	switch (event->type)                                              // Check For Windows Messages
 	{
+	case SDL_EVENT_QUIT:                                              // Have We Received A Quit Message?
+		{
+			done = true;                                              // If So done=TRUE
+			break;
+		}
+				
 	case SDL_EVENT_KEY_DOWN:                                          // Is A Key Being Held Down?
 		{
-			keys[uMsg->key.keysym.scancode] = true;                 // If So, Mark It As TRUE
+			keys[event->key.keysym.scancode] = true;                  // If So, Mark It As TRUE
 			break;                                                    // Jump Back
 		}
 
 	case SDL_EVENT_KEY_UP:                                            // Has A Key Been Released?
 		{
-			keys[uMsg->key.keysym.scancode] = false;                // If So, Mark It As FALSE
+			keys[event->key.keysym.scancode] = false;                 // If So, Mark It As FALSE
 			break;                                                    // Jump Back
 		}
 
 	case SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED:                         // Resize The OpenGL Window
 		{
-			ReSizeGLScene(uMsg->window.data1, uMsg->window.data2);  // LoWord=Width, HiWord=Height
+			ReSizeGLScene(event->window.data1, event->window.data2);  // data1=Width, data2=Height
 			break;                                                    // Jump Back
 		}
+	default: break;
 	}
 }
 
 int main(int argc, char *argv[])
 {
-	SDL_Event msg;                                  // Windows Message Structure
-	bool done = false;                              // Bool Variable To Exit Loop
 
 	SDL_Init(SDL_INIT_VIDEO);
 
@@ -478,26 +486,19 @@ int main(int argc, char *argv[])
 
 	while (!done)                                   // Loop That Runs While done=FALSE
 	{
-		if (SDL_PollEvent(&msg) > 0)                // Is There A Message Waiting?
+		SDL_Event event;                            // SDL Event Structure
+		while (SDL_PollEvent(&event) > 0)           // Is There A Message Waiting?
 		{
-			if (msg.type == SDL_EVENT_QUIT)         // Have We Received A Quit Message?
+			WndProc(&event);                        // Deal with events
-			{
-				done = true;                        // If So done=TRUE
 		}
-			else                                    // If Not, Deal With Window Messages
+
-			{
-				WndProc(&msg);
-			}
-		}
-		else                                        // If There Are No Messages
-		{
 		// Draw The Scene.  Watch For ESC Key And Quit Messages From DrawGLScene()
 		if ((active && !DrawGLScene()) || keys[SDL_SCANCODE_ESCAPE])  // Active?  Was There A Quit Received?
 		{
 			done = true;                            // ESC or DrawGLScene Signalled A Quit
+			break;
 		}
-			else                                    // Not Time To Quit, Update Screen
+
-			{
 		SDL_GL_SwapWindow(win);                     // Swap Buffers (Double Buffering)
 		if (keys[SDL_SCANCODE_B] && !bpressed)
 		{
@@ -609,8 +610,6 @@ int main(int argc, char *argv[])
 			}
 		}
 	}
-		}
-	}
 
 	// Shutdown
 	FreeResources();