frame cap shit

game.cpp

@@ -18,13 +18,16 @@
 #define MAX_MAP_TILES_Y 11 /*16*/
 #define TILE_WIDTH 16
 #define TILE_HEIGHT 16
+#define PLAYER_SPEED 1.0f
 
 #define UNUSED(x) (void)(x)
 
 //#define for_map for (int col = 0; col < MAX_MAP_TILES_Y; ++col) for (int row = 0; row < MAX_MAP_TILES_X; ++row)
 #define debug_print_rect(r) printf("x: %d, y: %d, w: %d, h: %d\n", r.x, r.y, r.w, r.h);
 
+#define USE_VSYNC 0
 #define USE_LOGICAL_RENDER_VIEW 1
+#define FPS 60
 //#define USE_STATIC_ARRAY_LVL
 
 using namespace std;
@@ -89,6 +92,18 @@ struct R {
    	}
 };
 
+/*struct Keys {
+	static bool down_pressed;
+	static bool up_pressed;
+	static bool left_pressed;
+	static bool right_pressed;
+};
+bool Keys::down_pressed = false;
+bool Keys::up_pressed = false;
+bool Keys::left_pressed = false;
+bool Keys::right_pressed = false;
+*/
+
 // Global variables
 vector<R> rooms;
 SDL_Window* window;
@@ -100,11 +115,26 @@ struct Player {
 	Rect src_rect;
 	Rect body_hitbox; // player is a 16*16 tile + 8 pixels in height for the head, we ignore those
 	int x, y;
-	Player() : src_rect(0, 39, TILE_WIDTH, TILE_HEIGHT + 10/*head size*/), body_hitbox(0, 48, TILE_WIDTH, TILE_HEIGHT), x(0), y(0) {}
+
+	float speed;
+	int x_vel, y_vel;
+	
+	Player() : src_rect(0, 39, TILE_WIDTH, TILE_HEIGHT + 10/*head size*/), body_hitbox(0, 48, TILE_WIDTH, TILE_HEIGHT), x(0), y(0), speed(PLAYER_SPEED) 
+		,x_vel(0), y_vel(0) {}
+	
 	void draw() {
 		Rect dst(x, y, src_rect()->w, src_rect()->h);
 		SDL_RenderCopy(renderer, tiles, src_rect(), dst());
-	}                                                    
+	}
+	void update() {
+		// TODO: time wtf, tick
+		/*if (Keys::down_pressed) y += speed;
+		if (Keys::up_pressed) y -= speed;
+		if (Keys::left_pressed) x -= speed;
+		if (Keys::right_pressed) x += speed;*/
+		x += x_vel;
+		y += y_vel;
+    } 	                                               
 } player;
 
 // A room is a screen in the sense of a static screen, aka the player doesnt move a camera, 
@@ -149,7 +179,12 @@ extern "C" int main(int argc, char** argv) {
 
 	window = SDL_CreateWindow(WINDOW_TITLE, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, WINDOW_WIDTH, WINDOW_HEIGHT, 0);
 	if (!window) die("failed to create window");
-	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED);
+	renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED
+	#if USE_VSYNC
+	 | SDL_RENDERER_PRESENTVSYNC);
+	#else
+	);
+	#endif
 	if (!renderer) die("failed to create renderer");
 
 #if USE_LOGICAL_RENDER_VIEW
@@ -167,10 +202,11 @@ extern "C" int main(int argc, char** argv) {
 
 	int next_room(0);
 	quit = false;
+	//float now(0), secs(0), last_time(0);
 	while (!quit) {
 		SDL_Event e;
 	
-		if (SDL_PollEvent(&e)) {
+		while (SDL_PollEvent(&e)) {
 			if (e.type == SDL_QUIT) quit = true;
 			
 			if (e.type == SDL_KEYDOWN) {
@@ -181,16 +217,40 @@ extern "C" int main(int argc, char** argv) {
 				case SDLK_1: next_room = 1; break;
 				case SDLK_2: next_room = 2; break;
 				// fin debug
+
+				case SDLK_DOWN: player.y_vel = PLAYER_SPEED; break;
+				case SDLK_UP: player.y_vel = -PLAYER_SPEED; break;
+				case SDLK_RIGHT: player.x_vel = PLAYER_SPEED; break;
+				case SDLK_LEFT: player.x_vel = -PLAYER_SPEED; break;
+				}
+			} else if (e.type == SDL_KEYUP) {
+				switch (e.key.keysym.sym) {
+				case SDLK_DOWN:  if (player.y_vel > 0) player.y_vel = 0; break;
+				case SDLK_UP:    if (player.y_vel < 0) player.y_vel = 0; break;
+				case SDLK_RIGHT: if (player.x_vel > 0) player.x_vel = 0; break;
+				case SDLK_LEFT:  if (player.x_vel < 0) player.x_vel = 0; break;
 				}
 			}
 		}
 
+		player.update(); //TODO: time and shit
+
 		SDL_RenderClear(renderer);
 
 		// Current room rendering
 		draw_room(&next_room);
 		player.draw();
 		                                                               
+		/*
+		float freq = SDL_GetPerformanceFrequency();
+
+		now = SDL_GetPerformanceCounter();
+		secs = (now - last_time) / freq;
+		SDL_Delay(FPS - secs * 1000);
+		*/
+
+		SDL_Delay(16);
+
 		SDL_RenderPresent(renderer);
 	}