move chunk loading into world class

src/minecraft.cpp

@@ -5,7 +5,7 @@ using namespace std::chrono;
 
 namespace app {
 
-Minecraft::Minecraft() : xeEngine{WIDTH, HEIGHT, "Minecraft Vulkan", "res/image/icon.png"} {};
+Minecraft::Minecraft() : engine{WIDTH, HEIGHT, "Minecraft Vulkan", "res/image/icon.png"} {};
 
 Minecraft::~Minecraft() {}
 
@@ -13,83 +13,35 @@ void Minecraft::run() {
 
   Chunk::load();
 
-  auto viewerObject = xe::GameObject::createGameObject();
+  auto viewer = xe::GameObject::createGameObject();
-  viewerObject.transform.translation = {0.f, 40.f, 0.f};
+  viewer.transform.translation = {0.f, 40.f, 0.f};
-  viewerObject.transform.rotation.y = glm::radians(45.f);
+  viewer.transform.rotation.y = glm::radians(45.f);
 
-  createGameObjects(viewerObject);
+  World world {viewer, 10, 12345};
-
-  ChunkRenderer renderer{Chunk::getTextures()};
 
   xe::Sound sound{"res/sound/when_the_world_ends.wav"};
   sound.setLooping(true);
   sound.play();
     
-  PlayerController cameraController{xeEngine.getInput(), viewerObject};
+  PlayerController playerController{engine.getInput(), viewer};
 
-  while (xeEngine.poll()) {
+  while (engine.poll()) {
 
-    float frameTime = xeEngine.getFrameTime();
+    playerController.update(engine.getFrameTime());
 
-    cameraController.update(frameTime);
+    world.reloadChunks();
-    xeEngine.getCamera().setViewYXZ(viewerObject.transform.translation, viewerObject.transform.rotation);
 
-    if(xeEngine.beginFrame()) {
+    if(engine.beginFrame()) {
-      renderer.render(loadedChunks, xeEngine.getCamera());
+      world.render(engine.getCamera());
-      xeEngine.endFrame();
+      engine.endFrame();
     }
-    
-    reloadLoadedChunks(viewerObject);
 
   }
 
-  xeEngine.close();
+  engine.close();
 
   Chunk::unload();
 
 }
 
-void Minecraft::createGameObjects(xe::GameObject& viewer) {
-  int width = 2*RENDER_DISTANCE+1;
-  loadedChunks.clear();
-  for(int32_t x = 0; x < width; x++) {
-    for(int32_t z = 0; z < width; z++) {
-      auto gameObject = xe::GameObject::createGameObject();
-      gameObject.transform.translation = glm::vec3(0.f);
-      loadedChunks.push_back(std::move(gameObject));
-    }
-  }
-}
-
-void Minecraft::reloadLoadedChunks(xe::GameObject& viewer) {
-  viewX = static_cast<int>(floor(viewer.transform.translation.x / Chunk::CHUNK_SIZE.x));
-  viewZ = static_cast<int>(floor(viewer.transform.translation.z / Chunk::CHUNK_SIZE.z));
-  int width = 2*RENDER_DISTANCE+1;
-  int minX = viewX - RENDER_DISTANCE;
-  int minZ = viewZ - RENDER_DISTANCE;
-  int maxX = viewX + RENDER_DISTANCE;
-  int maxZ = viewZ + RENDER_DISTANCE;
-  for(int32_t x = 0; x < width; x++) {
-    for(int32_t z = 0; z < width; z++) {
-      auto& gameObject = loadedChunks[x + z * width];
-      int gridX = static_cast<int>(floor(gameObject.transform.translation.x / Chunk::CHUNK_SIZE.x));
-      int gridZ = static_cast<int>(floor(gameObject.transform.translation.z / Chunk::CHUNK_SIZE.z));
-      int newGridX = minX + x;
-      int newGridZ = minZ + z;
-      if(gridX < minX || gridZ < minZ || gridX > maxX || gridZ > maxZ)
-        Chunk::deleteChunk(gridX, gridZ);
-      Chunk* chunk = Chunk::getChunk(newGridX, newGridZ);
-      if(chunk == nullptr) {
-        chunk = Chunk::newChunk(newGridX, newGridZ, 12345);
-        Chunk::generateAsync(chunk);
-      }
-      if(chunk->getMesh() == nullptr){
-        Chunk::createMeshAsync(chunk);
-      }
-      gameObject.model = chunk->getMesh();
-      gameObject.transform.translation = glm::vec3(newGridX * Chunk::CHUNK_SIZE.x, 0, newGridZ * Chunk::CHUNK_SIZE.z);
-    }
-  }
-}
-
 }

src/minecraft.hpp

@@ -3,8 +3,8 @@
 #include "xe_engine.hpp"
 
 #include "player_controller.hpp"
-#include "chunk_renderer.hpp"
 #include "chunk.hpp"
+#include "world.hpp"
 
 #define GLM_FORCE_RADIANS
 #define GLM_FORCE_DEPTH_ZERO_TO_ONE
@@ -23,24 +23,13 @@ class Minecraft {
     Minecraft();
     ~Minecraft();
 
-    Minecraft(const Minecraft &) = delete;
-    Minecraft operator=(const Minecraft &) = delete;
-
     void run();
 
   private:
   
     static constexpr int WIDTH = 800;
     static constexpr int HEIGHT = 600;
-    static constexpr int RENDER_DISTANCE = 10;
 
-    void createGameObjects(xe::GameObject& viewer);
+    xe::Engine engine;
-    void reloadLoadedChunks(xe::GameObject& viewer);
-    
-
-    int viewX, viewZ;
-
-    xe::Engine xeEngine;
-    std::vector<xe::GameObject> loadedChunks;
 };
 }

src/world.cpp

@@ -0,0 +1,98 @@
+#include "world.hpp"
+
+namespace app {
+
+World::World(xe::GameObject& viewer, int renderDistance, int worldSeed) 
+  : viewer{viewer}, 
+    renderDistance{renderDistance},
+    worldSeed{worldSeed},
+    chunkRenderer{Chunk::getTextures()} {
+  reloadChunks(renderDistance);
+}
+
+World::~World() {}
+
+void World::reloadChunks() {
+  int currentViewX = static_cast<int>(floor(viewer.transform.translation.x / Chunk::CHUNK_SIZE.x));
+  int currentViewZ = static_cast<int>(floor(viewer.transform.translation.z / Chunk::CHUNK_SIZE.z));
+  if(currentViewX != viewX || currentViewZ != viewZ) {
+    viewX = currentViewX;
+    viewZ = currentViewZ;
+    unloadOldChunks();
+    loadNewChunks();
+  }
+  updateChunkMeshs();
+}
+
+void World::reloadChunks(int newRenderDistance) {
+  renderDistance = newRenderDistance;
+  viewX = static_cast<int>(floor(viewer.transform.translation.x / Chunk::CHUNK_SIZE.x));
+  viewZ = static_cast<int>(floor(viewer.transform.translation.z / Chunk::CHUNK_SIZE.z));
+  resetChunks();
+  loadNewChunks();
+  updateChunkMeshs();
+}
+
+void World::resetChunks() {
+  unloadOldChunks();
+  loadedChunks.clear();
+  int width = 2*renderDistance+1;
+  for(int i = 0; i < width*width; i++) {
+    auto gameObject = xe::GameObject::createGameObject();
+    loadedChunks.push_back(std::move(gameObject));
+  }
+}
+
+void World::unloadOldChunks() {
+  int minX = viewX - renderDistance;
+  int minZ = viewZ - renderDistance;
+  int maxX = viewX + renderDistance;
+  int maxZ = viewZ + renderDistance;
+  for(auto &object : loadedChunks) {
+    int gridX = static_cast<int>(floor(object.transform.translation.x / Chunk::CHUNK_SIZE.x));
+    int gridZ = static_cast<int>(floor(object.transform.translation.z / Chunk::CHUNK_SIZE.z));
+    if(gridX < minX || gridZ < minZ || gridX > maxX || gridZ > maxZ){
+        Chunk::deleteChunk(gridX, gridZ);
+        object.model = nullptr;
+    }
+  }
+}
+
+void World::loadNewChunks() {
+  int width = 2*renderDistance+1;
+  int minX = viewX - renderDistance;
+  int minZ = viewZ - renderDistance;
+  int maxX = viewX + renderDistance;
+  int maxZ = viewZ + renderDistance;
+  int i = 0;
+  for(auto &object : loadedChunks) {
+    int gridX = minX + i % width;
+    int gridZ = minZ + i / width;
+    Chunk* chunk = Chunk::getChunk(gridX, gridZ);
+    if(chunk == nullptr) {
+      chunk = Chunk::newChunk(gridX, gridZ, worldSeed);
+      Chunk::generateAsync(chunk);
+    }
+    object.transform.translation = glm::vec3(gridX * Chunk::CHUNK_SIZE.x, 0, gridZ * Chunk::CHUNK_SIZE.z);
+    i++;
+  }
+}
+
+void World::updateChunkMeshs() {
+  for(auto &object : loadedChunks) {
+    int gridX = static_cast<int>(floor(object.transform.translation.x / Chunk::CHUNK_SIZE.x));
+    int gridZ = static_cast<int>(floor(object.transform.translation.z / Chunk::CHUNK_SIZE.z));
+    Chunk* chunk = Chunk::getChunk(gridX, gridZ);
+    if(chunk == nullptr) continue;
+    if(chunk->getMesh() == nullptr)
+      Chunk::createMeshAsync(chunk);
+    object.model = chunk->getMesh();
+  }
+}
+
+void World::render(xe::Camera& camera) {
+  camera.setViewYXZ(viewer.transform.translation, viewer.transform.rotation);
+  chunkRenderer.render(loadedChunks, camera);
+}
+
+}

src/world.hpp

@@ -0,0 +1,43 @@
+#pragma once
+
+#include "xe_game_object.hpp"
+#include "chunk_renderer.hpp"
+#include "chunk.hpp"
+
+#include <vector>
+
+namespace app {
+
+class World {
+
+  public:
+
+    World(xe::GameObject& viewer, int renderDistance, int worldSeed);
+    ~World();
+
+    void reloadChunks();
+    void reloadChunks(int newRenderDistance);
+    
+    void render(xe::Camera& camera);
+
+  private:
+
+    void resetChunks();
+
+    void unloadOldChunks();
+    void loadNewChunks();
+    void updateChunkMeshs();
+
+    int viewX, viewZ;
+
+    int worldSeed;
+    int renderDistance;
+    
+    const xe::GameObject& viewer;
+    std::vector<xe::GameObject> loadedChunks;
+
+    ChunkRenderer chunkRenderer;
+
+};
+
+}