206 lines
8.4 KiB
C++
206 lines
8.4 KiB
C++
#include <iostream>
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#include <glm/glm.hpp>
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#include <glm/gtc/constants.hpp>
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#ifdef _WIN32
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#define GLM_ENABLE_EXPERIMENTAL
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#include <glm/gtx/extended_min_max.hpp>
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#endif
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#include "engine/renderer/wavefront.h"
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#include "engine/app/app.h"
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#include "engine/components/transform.h"
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#include "engine/components/light.h"
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#include "engine/components/camera.h"
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#include "engine/components/mesh.h"
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#include "engine/components/rotate.h"
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#include "engine/components/batch.h"
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#include "engine/scene/scene.h"
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#include "engine/input/input.h"
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#include "engine/api.h"
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using namespace Core;
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class Game : public IApplication {
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public:
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Game() = default;
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~Game() override {}
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void OnInit(std::shared_ptr<Scene> scene) override {
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m_scene = scene;
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Object* lightObj = Object::LoadFile("./assets/common/sphere/sphere.obj");
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lightEntity = scene->CreateEntity();
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lightEntity.AddComponent<Transform>(glm::vec3(5.f, 5.f, 5.f), glm::vec3(0.f));
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lightEntity.AddComponent<light>(light::LightType::DIRECTIONAL, glm::vec3(1.f, 1.f, 1.f), 1.5f);
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lightEntity.AddComponent<mesh>(std::shared_ptr<Object>(lightObj));
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assert(lightEntity.HasComponent<mesh>() && "light doesn't have any mesh!");
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cameraEntity = scene->CreateEntity();
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cameraEntity.AddComponent<camera>();
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cameraEntity.AddComponent<Transform>(glm::vec3(0.f, 2.f, 2.f));
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assert(cameraEntity.HasComponent<camera>() && "Camera doesn't have required 'camera' component");
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assert(cameraEntity.HasComponent<Transform>() && "Camera doesn't have 'transform' component");
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Object* targetObj = Object::LoadFile("./assets/wizard/wizard.obj");
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modelEntity = scene->CreateEntity();
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modelEntity.AddComponent<Transform>(glm::vec3(0.f, 0.0f, 0.f));
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modelEntity.AddComponent<mesh>(std::shared_ptr<Object>(targetObj));
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modelEntity.AddComponent<rotate>();
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assert(modelEntity.HasComponent<mesh>() && "model doesn't have any mesh!");
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// Cube template (use shared object to avoid reloading 1000 times)
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std::shared_ptr<Object> cubeObj = std::shared_ptr<Object>(Object::LoadFile("./assets/grass_block/grass_block.obj"));
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auto batchEntt = scene->CreateEntity();
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auto& cubeBatch = batchEntt.AddComponent<batch>();
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// auto& cubeBatch = batchEntt.GetComponent<batch>();
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batchEntt.AddComponent<mesh>(cubeObj);
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assert(batchEntt.HasComponent<batch>() && "batch doesn't have any batch component!");
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assert(batchEntt.HasComponent<mesh>() && "batch doesn't have any mesh component!");
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// Generate 1000 random cubes
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for (int i = 0; i < 1000; ++i) {
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auto cubeEntity = scene->CreateEntity();
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float x = static_cast<float>(rand()) / RAND_MAX * 200.f - 100.f; // range [-100, 100]
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float y = static_cast<float>(rand()) / RAND_MAX * 10.f; // range [0, 10]
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float z = static_cast<float>(rand()) / RAND_MAX * 200.f - 100.f; // range [-100, 100]
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cubeEntity.AddComponent<Transform>(glm::vec3(x, y, z));
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cubeEntity.AddComponent<rotate>();
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cubeEntity.AddComponent<batch::item>(cubeBatch.id());
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}
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Object* floorObj = Object::LoadFile("./assets/common/plane/plane.obj");
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auto floorEntt = scene->CreateEntity();
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floorEntt.AddComponent<Transform>(glm::vec3(0.f));
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floorEntt.AddComponent<mesh>(std::shared_ptr<Object>(floorObj));
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assert(floorEntt.HasComponent<mesh>() && "floor doesn't have any mesh component!");
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std::cout << "Game initialized" << std::endl;
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m_angle = 3.45f;
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m_yaw = -90.0f; // looking along -Z initially
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m_pitch = 0.0f; // no vertical tilt
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}
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void OnUpdate(Timestep dt) override {
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glm::vec2 mouseRel = Input::GetRelativeMouse();
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float sensitivity = 0.1f; // tweak as needed
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m_yaw += mouseRel.x * sensitivity;
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m_pitch -= mouseRel.y * sensitivity; // invert Y for typical FPS control
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// clamp pitch to avoid flipping
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// if (pitch > 89.0f) pitch = 89.0f;
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// if (pitch < -89.0f) pitch = -89.0f;
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m_pitch = glm::clamp(m_pitch, -89.0f, 89.0f);
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// convert to direction vector
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glm::vec3 cameraViewDirection(0.f, 0.f, -1.f);
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cameraViewDirection.x = cos(glm::radians(m_yaw)) * cos(glm::radians(m_pitch));
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cameraViewDirection.y = sin(glm::radians(m_pitch));
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cameraViewDirection.z = sin(glm::radians(m_yaw)) * cos(glm::radians(m_pitch));
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cameraViewDirection = glm::normalize(cameraViewDirection);
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glm::vec3 velocity(0.f);
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glm::vec3 front = glm::normalize(glm::vec3(cameraViewDirection.x, 0.f, cameraViewDirection.z));
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glm::vec3 right = glm::normalize(glm::cross(front, glm::vec3(0.f, 1.f, 0.f)));
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if (Input::IsKeyPressed(SDL_SCANCODE_W)) velocity += front;
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if (Input::IsKeyPressed(SDL_SCANCODE_S)) velocity -= front;
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if (Input::IsKeyPressed(SDL_SCANCODE_A)) velocity -= right;
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if (Input::IsKeyPressed(SDL_SCANCODE_D)) velocity += right;
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if (Input::IsKeyPressed(SDL_SCANCODE_SPACE)) velocity.y += 1.f;
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if (Input::IsKeyPressed(SDL_SCANCODE_LSHIFT)) velocity.y -= 1.f;
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auto& camTransform = cameraEntity.GetComponent<Transform>();
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camTransform.position += velocity * (float)dt * 2.5f; // speed is e.g. 2.5f
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camTransform.rotation = cameraViewDirection;
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// update rotation
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m_angle += glm::radians(45.0f) * dt; // 72° per second
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if (m_angle > glm::two_pi<float>()) {
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m_angle -= glm::two_pi<float>(); // keep value small
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}
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// ---- Day-night simulation ----
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m_dayTime += dt;
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if (m_dayTime > m_dayLength)
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m_dayTime -= m_dayLength; // loop every "day"
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float dayProgress = m_dayTime / m_dayLength; // 0.0 -> 1.0
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float sunAngle = dayProgress * glm::two_pi<float>(); // radians through the sky
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// Compute sun direction (rotating around X axis)
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// At t=0.0 sun at east horizon, at π/2 overhead, at π west horizon
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glm::vec3 sunDir = glm::normalize(glm::vec3(0.0f, sin(sunAngle), cos(sunAngle)));
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// Compute intensity: bright at noon, dim at dusk/dawn, dark at night
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float intensity = glm::max(static_cast<double>(sin(sunAngle)), static_cast<double>(0.0f)); // 0 at night, 1 at noon
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intensity = glm::mix(0.05f, 1.5f, intensity); // keep some ambient even at night
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// Optional: tint color (warm at sunrise/sunset)
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glm::vec3 dayColor = glm::vec3(1.0f, 0.95f, 0.9f);
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glm::vec3 sunsetColor= glm::vec3(1.0f, 0.6f, 0.3f);
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float sunsetFactor = glm::clamp(1.0f - abs(sin(sunAngle)) * 2.0f, 0.0f, 1.0f);
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glm::vec3 sunColor = glm::mix(dayColor, sunsetColor, sunsetFactor);
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// Update the directional light in the registry
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auto& l = lightEntity.GetComponent<light>();
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auto& t = lightEntity.GetComponent<Transform>();
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if (l.type == light::LightType::DIRECTIONAL) {
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// "position" for directional light often stores direction vector
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// If your system instead uses transform.rotation, adjust accordingly
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t.position = sunDir * 15.f; // use this as light direction
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l.color = sunColor;
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l.intensity = intensity;
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}
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m_elapsed += dt.GetMilliseconds();
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if (m_elapsed >= 1000) { // one second passed
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m_elapsed = 0;
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double fps = 1 / dt;
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std::cout << "FPS: " << fps << std::endl;
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}
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}
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void OnEvent(const Event& event) override {
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if (event.GetType() == EventType::WINDOW_RESIZE) {
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auto resizeEvent = static_cast<const WindowResizeEvent&>(event);
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std::cout << "[DEBUG] <EVENT> Window resized to " << resizeEvent.GetWidth() << "x" << resizeEvent.GetHeight() << std::endl;
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}
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else if (event.GetType() == EventType::WINDOW_CLOSE) {
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std::cout << "[DEBUG] <EVENT> Window closing" << std::endl;
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}
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}
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private:
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// for internal 1-second timer
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int m_elapsed;
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std::shared_ptr<Scene> m_scene;
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Entity lightEntity;
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Entity cameraEntity;
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Entity modelEntity;
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float m_angle;
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float m_dayTime = 0.0f; // accumulates time for day-night cycle
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float m_dayLength = 60.0f; // seconds per full day cycle
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float m_yaw = -90.0f; // looking along -Z initially
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float m_pitch = 0.0f; // no vertical tilt
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};
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IApplication* CreateApplication() {
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return new Game();
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}
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