Capa de fondo con posibilidad de scroll

source/map.cpp

@@ -10,6 +10,8 @@ Map::Map(std::string file, SDL_Renderer *renderer, Asset *asset, ItemTracker *it
     name = file.substr(file.find_last_of("\\/") + 1);
     enemy_file = "";
     bgColor1 = bgColor2 = {0, 0, 0};
+    bgScroll = false;
+    counter = 0;
 
     // Copia los punteros a objetos
     this->asset = asset;
@@ -273,6 +275,7 @@ bool Map::setVars(std::string var, std::string value)
     {
         tileset_img = value;
     }
+
     else if (var == "bgColor1")
     {
         // Se introducen los valores separados por comas en un vector
@@ -285,6 +288,7 @@ bool Map::setVars(std::string var, std::string value)
         getline(ss, tmp, ',');
         bgColor1.b = std::stoi(tmp);
     }
+
     else if (var == "bgColor2")
     {
         // Se introducen los valores separados por comas en un vector
@@ -297,29 +301,41 @@ bool Map::setVars(std::string var, std::string value)
         getline(ss, tmp, ',');
         bgColor2.b = std::stoi(tmp);
     }
+
+    else if (var == "bgScroll")
+    {
+        bgScroll = stringToBool(value);
+    }
+
     else if (var == "room_up")
     {
         room_up = value;
     }
+
     else if (var == "room_down")
     {
         room_down = value;
     }
+
     else if (var == "room_left")
     {
         room_left = value;
     }
+
     else if (var == "room_right")
     {
         room_right = value;
     }
+
     else if (var == "enemy_file")
     {
         enemy_file = value;
     }
+
     else if (var == "")
     {
     }
+
     else
     {
         success = false;
@@ -338,53 +354,66 @@ bool Map::setActor(actor_t *actor, SDL_Point *p1, SDL_Point *p2, std::string var
     {
         actor->tileset = value;
     }
+
     else if (var == "animation")
     {
         actor->animation = value;
     }
+
     else if (var == "width")
     {
         actor->w = std::stoi(value);
     }
+
     else if (var == "height")
     {
         actor->h = std::stoi(value);
     }
+
     else if (var == "x")
     {
         actor->x = std::stof(value) * tile_size;
     }
+
     else if (var == "y")
     {
         actor->y = std::stof(value) * tile_size;
     }
+
     else if (var == "vx")
     {
         actor->vx = std::stof(value);
     }
+
     else if (var == "vy")
     {
         actor->vy = std::stof(value);
     }
+
     else if (var == "x1")
     {
         p1->x = std::stoi(value) * tile_size;
     }
+
     else if (var == "x2")
     {
         p2->x = std::stoi(value) * tile_size;
     }
+
     else if (var == "y1")
     {
         p1->y = std::stoi(value) * tile_size;
     }
+
     else if (var == "y2")
     {
         p2->y = std::stoi(value) * tile_size;
     }
+
     else if ((var == "[/moving platform]") || (var == "[/diamond]"))
     {
     }
+
     else
     {
         success = false;
@@ -468,8 +497,23 @@ void Map::render()
 void Map::renderLayer0()
 {
     // Dibuja la textura con el mapa en pantalla
-    SDL_Rect rect = {PLAY_AREA_X, PLAY_AREA_Y, PLAY_AREA_WIDTH, PLAY_AREA_HEIGHT};
-    SDL_RenderCopy(renderer, map_layer0, NULL, &rect);
+    if (bgScroll)
+    {
+        const int offset = PLAY_AREA_WIDTH - ((counter / 20) % PLAY_AREA_WIDTH);
+        SDL_Rect src1 = {PLAY_AREA_X, PLAY_AREA_Y, offset, PLAY_AREA_HEIGHT};
+        SDL_Rect dst1 = {PLAY_AREA_X + PLAY_AREA_WIDTH - offset, PLAY_AREA_Y, offset, PLAY_AREA_HEIGHT};
+
+        SDL_Rect src2 = {PLAY_AREA_X + offset, PLAY_AREA_Y, PLAY_AREA_WIDTH - offset, PLAY_AREA_HEIGHT};
+        SDL_Rect dst2 = {PLAY_AREA_X, PLAY_AREA_Y, PLAY_AREA_WIDTH - offset, PLAY_AREA_HEIGHT};
+
+        SDL_RenderCopy(renderer, map_layer0, &src1, &dst1);
+        SDL_RenderCopy(renderer, map_layer0, &src2, &dst2);
+    }
+    else
+    {
+        SDL_Rect rect = {PLAY_AREA_X, PLAY_AREA_Y, PLAY_AREA_WIDTH, PLAY_AREA_HEIGHT};
+        SDL_RenderCopy(renderer, map_layer0, nullptr, nullptr);
+    }
 }
 
 // Dibuja la capa 1
@@ -492,6 +536,8 @@ void Map::renderActors()
 // Actualiza todas las variables
 void Map::update()
 {
+    counter++;
+
     for (auto actor : actors)
     {
         actor->update();