Add very basic gameplay

src/kekrooms/cpp/kekrooms.cpp

@@ -1,6 +1,12 @@
+#include <algorithm>
+#include <cmath>
+#include <cstdlib>
 #include <glm/geometric.hpp>
 #include <iostream>
+#include <map>
 #include <memory>
+#include <tuple>
+#include <vector>
 
 #include "BulletCollision/CollisionDispatch/btCollisionObject.h"
 #include "BulletCollision/CollisionShapes/btBoxShape.h"
@@ -22,8 +28,103 @@
 
 using namespace kek;
 
+#define CHUNK_SIZE 64
+#define CHUNK_RADIUS 2
+#define WALLS_PER_CHUNK 20
+#define WALL_HEIGHT 9
+
 static ButtonElement *buttonPlay;
 
+static SpotLight *flashlight;
+
+struct Chunk {
+	int x, z;
+	GameObject *floor;
+	GameObject *ceiling;
+	std::vector<GameObject *> walls;
+};
+
+std::map<long int, Chunk> loadedChunks;
+Mesh *floorMesh;
+TextElement *debugText;
+std::shared_ptr<Texture> red;
+std::shared_ptr<Texture> gray;
+
+void gameLoop(GLFWwindow *window, void *) {
+	Player *player = Engine::getPlayer();
+	Camera *camera = Engine::getActiveCamera();
+	glm::vec3 playerPos = player->getPosition();
+	Scene *scene = Engine::getActiveScene();
+
+	SpotLight *fl = (SpotLight *) flashlight;
+	glm::vec3 playerRight = glm::cross(camera->direction, glm::vec3(0, 1, 0));
+	fl->moveTo(playerPos + glm::normalize(playerRight) * 0.3f);
+	fl->lookAt(camera->direction);
+
+	int chunkX = (int) playerPos.x / CHUNK_SIZE;
+	int chunkZ = (int) playerPos.z / CHUNK_SIZE;
+	debugText->setText("CX: " + std::to_string(chunkX) + ", CZ: " + std::to_string(chunkZ));
+
+	for(auto it = loadedChunks.cbegin(); it != loadedChunks.cend();) {
+		const Chunk *ch = &it->second;
+		if(std::abs(ch->x - chunkX) > CHUNK_RADIUS || abs(ch->z - chunkZ) > CHUNK_RADIUS) {
+			scene->removeObject(ch->floor);
+
+			for(auto w : ch->walls) {
+				scene->removeObject(w);
+			}
+
+			it = loadedChunks.erase(it);
+			continue;
+		}
+
+		it = std::next(it);
+	}
+
+	std::shared_ptr<Texture> wallpaper = Texture::load("image/wallpaper.png");
+
+	for(int x = chunkX - CHUNK_RADIUS; x <= chunkX + CHUNK_RADIUS; x++) {
+		for(int z = chunkZ - CHUNK_RADIUS; z <= chunkZ + CHUNK_RADIUS; z++) {
+			long int chunkID = ((long int) x & 0xFFFF) << 16 | ((long int) z & 0xFFFF);
+			auto chunk = loadedChunks.find(chunkID);
+			if(chunk == loadedChunks.end()) {
+				GameObject *floor = new GameObject();
+				floor->addMesh(genCubeMesh(CHUNK_SIZE, 2, CHUNK_SIZE, gray, gray, gray));
+				floor->addPhysics(new btBoxShape(btVector3(CHUNK_SIZE / 2, 1, CHUNK_SIZE / 2)), 0, btCollisionObject::CF_STATIC_OBJECT);
+				floor->moveTo(glm::vec3(x * CHUNK_SIZE, 0, z * CHUNK_SIZE));
+				scene->addObject(floor);
+
+				GameObject *ceiling = new GameObject();
+				ceiling->addMesh(genCubeMesh(CHUNK_SIZE, 2, CHUNK_SIZE, gray, gray, gray));
+				ceiling->addPhysics(new btBoxShape(btVector3(CHUNK_SIZE / 2, 1, CHUNK_SIZE / 2)), 0, btCollisionObject::CF_STATIC_OBJECT);
+				ceiling->moveTo(glm::vec3(x * CHUNK_SIZE, WALL_HEIGHT, z * CHUNK_SIZE));
+				scene->addObject(ceiling);
+
+				std::vector<GameObject *> walls;
+				std::srand(chunkID);
+				for(unsigned int i = 0; i < WALLS_PER_CHUNK; i++) {
+					double wallLength = (double) std::rand() / RAND_MAX * 20 + 10;
+					bool rotated = std::rand() < RAND_MAX / 2;
+					GameObject *wall = new GameObject();
+					wall->addMesh(genCubeMesh(wallLength, WALL_HEIGHT, 1, wallpaper, wallpaper, wallpaper));
+					wall->addPhysics(new btBoxShape(btVector3(wallLength / 2, WALL_HEIGHT / 2, 0.5)), 0, btCollisionObject::CF_STATIC_OBJECT);
+					wall->moveTo(glm::vec3(x * CHUNK_SIZE + ((double) rand() / RAND_MAX * CHUNK_SIZE), WALL_HEIGHT / 2, z * CHUNK_SIZE + ((double) rand() / RAND_MAX * CHUNK_SIZE)));
+
+					if(rotated) {
+						wall->rotate(glm::radians(90.0f), glm::vec3(0, 1, 0));
+					}
+
+					scene->addObject(wall);
+					walls.push_back(wall);
+				}
+
+				Chunk newChunk{x, z, floor, ceiling, walls};
+				loadedChunks.emplace(chunkID, newChunk);
+			}
+		}
+	}
+}
+
 void startGame(void *) {
 	buttonPlay->visible = false;
 
@@ -31,23 +132,19 @@ void startGame(void *) {
 
 	std::shared_ptr<Texture> wallpaper = Texture::load("image/wallpaper.png");
 	std::shared_ptr<Texture> white = Texture::generateColor(glm::vec3(1));
+	red = Texture::generateColor(glm::vec3(1, 0, 0));
+	gray = Texture::generateColor(glm::vec3(0.2, 0.2, 0.2));
 
-	SpotLight *flashlight = new SpotLight(glm::vec3(1), glm::vec3(0), 2, 5, 5, 0.5, 0.7);
-	flashlight->moveTo(Engine::getPlayer()->getPosition());
+	flashlight = new SpotLight(glm::vec3(1), glm::vec3(0), 2, 3, 5, 0.5, 0.6);
+	flashlight->moveTo(Engine::getPlayer()->getPosition() + glm::vec3(0, KEK_PLAYER_EYE_OFFSET, 0));
 
-	Input::addPeriodicCallback(PeriodicCallback([](GLFWwindow *window, void *light) {
-		SpotLight *fl = (SpotLight *) light;
-		glm::vec3 playerRight = glm::cross(Engine::getActiveCamera()->direction, glm::vec3(0, 1, 0));
-		fl->moveTo(Engine::getPlayer()->getPosition() + glm::normalize(playerRight) * 0.3f);
-		fl->lookAt(Engine::getActiveCamera()->direction);
-	},
-		flashlight));
+	Input::addPeriodicCallback(PeriodicCallback(gameLoop, nullptr));
 
 	std::shared_ptr<Texture> cubeTexture = Texture::generateColor(glm::vec3(1, 0, 0));
-	GameObject *floor = new GameObject();
-	floor->addPhysics(new btBoxShape(btVector3(50, 0.5, 50)), 0, btCollisionObject::CF_STATIC_OBJECT);
-	floor->addMesh(genCubeMesh(100, 1, 100, cubeTexture, cubeTexture, white));
-	scene->addObject(floor);
+	GameObject *floorObject = new GameObject();
+	floorObject->addPhysics(new btBoxShape(btVector3(CHUNK_SIZE / 2, 0.5, CHUNK_SIZE / 2)), 0, btCollisionObject::CF_STATIC_OBJECT);
+	floorObject->addMesh(genCubeMesh(CHUNK_SIZE, 1, CHUNK_SIZE, cubeTexture, cubeTexture, white));
+	scene->addObject(floorObject);
 
 	for(unsigned int i = 0; i < 10; i++) {
 		GameObject *cube = new GameObject();
@@ -58,7 +155,11 @@ void startGame(void *) {
 	}
 
 	scene->lights->add(flashlight);
-	scene->lights->add(new DirectionalLight(glm::vec3(0.001), glm::vec3(-0.1, -1, 0.1)));
+	scene->lights->add(new DirectionalLight(glm::vec3(0.005), glm::vec3(-0.1, -1, 0.1)));
+
+	debugText = new TextElement(uiPx(10), uiPx(100));
+	debugText->setText("Hello!");
+	UI::addElement(debugText);
 
 	Engine::setActiveScene(scene);