Scene 3

Nothing New, Everything Better

The DefaultScene is the one (and only) scene that will be used throughout the game. It builds the scene, node by node, and returns the built scene graph.

game/default_scene.h

#pragma once

#include <memory>

#include "engine/app.h"
#include "engine/scene.h"

namespace game {

std::unique_ptr<ng::Scene> MakeDefaultScene(ng::App* app);

}  // namespace game

game/default_scene.cc

#include "default_scene.h"

#include <cstdint>
#include <memory>
#include <utility>

#include "background.h"
#include "engine/app.h"
#include "engine/node.h"
#include "engine/scene.h"
#include "engine/tile.h"
#include "engine/tilemap.h"
#include "engine/tileset.h"
#include "mushroom.h"
#include "player.h"
#include "tile_id.h"

namespace game {

std::unique_ptr<ng::Scene> MakeDefaultScene(ng::App* app) {
  auto scene = std::make_unique<ng::Scene>(app);
  scene->SetName("Scene");

  ng::Tileset tileset(
      {32, 32}, &app->GetResourceManager().LoadTexture("Terrain (16x16).png"));
  tileset.AddTile(ng::Tile(TileID::kVoid));
  tileset.AddTile(
      ng::Tile(TileID::kDirt, sf::IntRect({7 * 16, 0 * 16}, {16, 16})));

  auto tmp_tilemap =
      std::make_unique<ng::Tilemap>(app, sf::Vector2u(64, 32), tileset);
  scene->MakeChild<Background>(
      tmp_tilemap->GetSize().componentWiseMul(tmp_tilemap->GetTileSize()));

  auto& tilemap = *tmp_tilemap;
  scene->AddChild(std::move(tmp_tilemap));

  for (uint32_t i = 0; i < 8; ++i) {
    tilemap.SetTile({0, i}, TileID::kDirt);
  }
  for (uint32_t i = 0; i < 20; ++i) {
    tilemap.SetTile({i, 8}, TileID::kDirt);
  }
  for (uint32_t i = 0; i < 8; ++i) {
    tilemap.SetTile({20 - 1, i}, TileID::kDirt);
  }

  for (int i = 0; i < 5; ++i) {
    auto& mushroom = scene->MakeChild<Mushroom>(&tilemap);
    mushroom.SetLocalPosition({64.F * (static_cast<float>(i) + 1), 64.F});
  }

  auto& player = scene->MakeChild<Player>(&tilemap);
  player.SetLocalPosition({64, 64});

  return scene;
}

}  // namespace game