537 lines
16 KiB
C++
537 lines
16 KiB
C++
#include <extra2d.h>
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#include <random>
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using namespace extra2d;
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// ============================================================================
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// 性能统计
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// ============================================================================
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struct PerformanceStats {
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double updateTime = 0.0;
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double collisionTime = 0.0;
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double renderTime = 0.0;
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size_t collisionCount = 0;
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size_t nodeCount = 0;
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const char *strategyName = "Unknown";
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};
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// ============================================================================
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// 碰撞节点 - 使用引擎自带的空间索引功能
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// ============================================================================
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class PhysicsNode : public Node {
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public:
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PhysicsNode(float size, const Color &color, int id)
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: size_(size), color_(color), id_(id), isColliding_(false) {
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// 启用引擎自带的空间索引功能
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// 这是关键：设置 spatialIndexed_ = true 让节点参与空间索引
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setSpatialIndexed(true);
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// 随机速度
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std::random_device rd;
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std::mt19937 gen(rd() + id);
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std::uniform_real_distribution<float> velDist(-150.0f, 150.0f);
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velocity_ = Vec2(velDist(gen), velDist(gen));
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}
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void setColliding(bool colliding) { isColliding_ = colliding; }
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bool isColliding() const { return isColliding_; }
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int getId() const { return id_; }
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// 必须实现 getBoundingBox() 才能参与空间索引碰撞检测
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Rect getBoundingBox() const override {
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Vec2 position = pos();
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return Rect(position.x - size_ / 2, position.y - size_ / 2, size_, size_);
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}
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void update(float dt, float screenWidth, float screenHeight) {
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Vec2 position = pos();
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position = position + velocity_ * dt;
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// 边界反弹
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if (position.x < size_ / 2 || position.x > screenWidth - size_ / 2) {
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velocity_.x = -velocity_.x;
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position.x = std::clamp(position.x, size_ / 2, screenWidth - size_ / 2);
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}
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if (position.y < size_ / 2 || position.y > screenHeight - size_ / 2) {
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velocity_.y = -velocity_.y;
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position.y = std::clamp(position.y, size_ / 2, screenHeight - size_ / 2);
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}
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setPosition(position);
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}
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void onRender(RenderBackend &renderer) override {
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Vec2 position = pos();
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// 碰撞时变红色
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Color fillColor = isColliding_ ? Color(1.0f, 0.2f, 0.2f, 0.9f) : color_;
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renderer.fillRect(Rect(position.x - size_ / 2, position.y - size_ / 2, size_, size_),
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fillColor);
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// 绘制边框
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Color borderColor = isColliding_ ? Color(1.0f, 0.0f, 0.0f, 1.0f)
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: Color(0.3f, 0.3f, 0.3f, 0.5f);
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renderer.drawRect(Rect(position.x - size_ / 2, position.y - size_ / 2, size_, size_),
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borderColor, 1.0f);
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}
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private:
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float size_;
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Color color_;
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int id_;
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bool isColliding_;
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Vec2 velocity_;
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};
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// ============================================================================
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// 空间索引演示场景
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// ============================================================================
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class SpatialIndexDemoScene : public Scene {
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public:
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void onEnter() override {
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// 必须先调用父类的 onEnter()，这样才能正确设置 running_ 状态
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// 并触发子节点的 onAttachToScene，将节点注册到空间索引
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Scene::onEnter();
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E2D_LOG_INFO("SpatialIndexDemoScene::onEnter - 引擎空间索引演示");
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auto &app = Application::instance();
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screenWidth_ = static_cast<float>(app.getConfig().width);
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screenHeight_ = static_cast<float>(app.getConfig().height);
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// 设置背景色
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setBackgroundColor(Color(0.05f, 0.05f, 0.1f, 1.0f));
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// 创建100个碰撞节点
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createPhysicsNodes(100);
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// 加载字体
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loadFonts();
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E2D_LOG_INFO("空间索引已启用: {}", isSpatialIndexingEnabled());
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}
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void onExit() override {
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// 显式移除所有子节点，确保在场景析构前正确清理空间索引
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// 这必须在 Scene::onExit() 之前调用，因为 onExit() 会将 running_ 设为 false
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removeAllChildren();
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Scene::onExit();
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}
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void onUpdate(float dt) override {
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Scene::onUpdate(dt);
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auto startTime = std::chrono::high_resolution_clock::now();
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// 更新所有物理节点位置
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for (const auto &child : children()) {
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if (auto node = dynamic_cast<PhysicsNode *>(child.get())) {
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node->update(dt, screenWidth_, screenHeight_);
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}
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}
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auto updateEndTime = std::chrono::high_resolution_clock::now();
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stats_.updateTime =
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std::chrono::duration<double, std::milli>(updateEndTime - startTime)
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.count();
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// 使用引擎自带的空间索引进行碰撞检测
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performCollisionDetection();
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auto collisionEndTime = std::chrono::high_resolution_clock::now();
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stats_.collisionTime = std::chrono::duration<double, std::milli>(
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collisionEndTime - updateEndTime)
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.count();
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// 统计物理节点数量
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stats_.nodeCount = getPhysicsNodeCount();
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// 获取当前使用的空间索引策略
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stats_.strategyName = getSpatialManager().getStrategyName();
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// 检查退出按键
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auto &input = Application::instance().input();
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if (input.isButtonPressed(GamepadButton::Start)) {
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E2D_LOG_INFO("退出应用");
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Application::instance().quit();
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}
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// 按 A 键添加节点
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if (input.isButtonPressed(GamepadButton::A)) {
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addNodes(100);
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}
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// 按 B 键减少节点
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if (input.isButtonPressed(GamepadButton::B)) {
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removeNodes(100);
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}
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// 按 X 键切换空间索引策略
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if (input.isButtonPressed(GamepadButton::X)) {
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toggleSpatialStrategy();
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}
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}
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void onRender(RenderBackend &renderer) override {
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auto renderStart = std::chrono::high_resolution_clock::now();
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Scene::onRender(renderer);
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auto renderEnd = std::chrono::high_resolution_clock::now();
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stats_.renderTime =
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std::chrono::duration<double, std::milli>(renderEnd - renderStart)
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.count();
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// 更新UI文本内容
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updateUI();
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// 绘制图例方块（Text组件会自动渲染）
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drawLegend(renderer);
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}
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private:
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/**
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* @brief 加载字体资源并创建UI文本组件
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*/
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void loadFonts() {
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auto &resources = Application::instance().resources();
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titleFont_ = resources.loadFont("assets/font.ttf", 28, true);
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infoFont_ = resources.loadFont("assets/font.ttf", 16, true);
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// 创建标题文本
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titleText_ = Text::create("引擎空间索引演示", titleFont_);
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titleText_->setPosition(30.0f, 20.0f);
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titleText_->setTextColor(Color(1.0f, 1.0f, 1.0f, 1.0f));
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addChild(titleText_);
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float x = 30.0f;
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float y = 60.0f;
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float lineHeight = 22.0f;
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// 创建统计信息文本
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nodeCountText_ = Text::create("", infoFont_);
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nodeCountText_->setPosition(x, y);
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nodeCountText_->setTextColor(Color(0.9f, 0.9f, 0.9f, 1.0f));
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addChild(nodeCountText_);
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y += lineHeight;
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strategyText_ = Text::create("", infoFont_);
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strategyText_->setPosition(x, y);
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strategyText_->setTextColor(Color(0.5f, 1.0f, 0.5f, 1.0f));
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addChild(strategyText_);
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y += lineHeight;
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collisionText_ = Text::create("", infoFont_);
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collisionText_->setPosition(x, y);
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collisionText_->setTextColor(Color(1.0f, 0.5f, 0.5f, 1.0f));
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addChild(collisionText_);
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y += lineHeight;
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updateTimeText_ = Text::create("", infoFont_);
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updateTimeText_->setPosition(x, y);
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updateTimeText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(updateTimeText_);
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y += lineHeight;
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collisionTimeText_ = Text::create("", infoFont_);
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collisionTimeText_->setPosition(x, y);
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collisionTimeText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(collisionTimeText_);
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y += lineHeight;
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renderTimeText_ = Text::create("", infoFont_);
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renderTimeText_->setPosition(x, y);
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renderTimeText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(renderTimeText_);
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y += lineHeight;
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fpsText_ = Text::create("", infoFont_);
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fpsText_->setPosition(x, y);
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fpsText_->setTextColor(Color(0.5f, 1.0f, 0.5f, 1.0f));
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addChild(fpsText_);
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y += lineHeight * 1.5f;
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// 创建操作说明文本
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helpTitleText_ = Text::create("操作说明:", infoFont_);
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helpTitleText_->setPosition(x, y);
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helpTitleText_->setTextColor(Color(1.0f, 1.0f, 0.5f, 1.0f));
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addChild(helpTitleText_);
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y += lineHeight;
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helpAddText_ = Text::create("A键 - 添加100个节点", infoFont_);
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helpAddText_->setPosition(x + 10, y);
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helpAddText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(helpAddText_);
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y += lineHeight;
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helpRemoveText_ = Text::create("B键 - 移除100个节点", infoFont_);
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helpRemoveText_->setPosition(x + 10, y);
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helpRemoveText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(helpRemoveText_);
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y += lineHeight;
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helpToggleText_ = Text::create("X键 - 切换索引策略", infoFont_);
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helpToggleText_->setPosition(x + 10, y);
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helpToggleText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(helpToggleText_);
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y += lineHeight;
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helpExitText_ = Text::create("+键 - 退出程序", infoFont_);
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helpExitText_->setPosition(x + 10, y);
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helpExitText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(helpExitText_);
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// 创建图例文本
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float legendX = screenWidth_ - 200.0f;
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float legendY = 20.0f;
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legendTitleText_ = Text::create("图例:", infoFont_);
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legendTitleText_->setPosition(legendX, legendY);
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legendTitleText_->setTextColor(Color(1.0f, 1.0f, 1.0f, 1.0f));
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addChild(legendTitleText_);
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legendY += 25.0f;
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legendNormalText_ = Text::create("- 正常", infoFont_);
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legendNormalText_->setPosition(legendX + 20.0f, legendY);
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legendNormalText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(legendNormalText_);
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legendY += 25.0f;
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legendCollidingText_ = Text::create("- 碰撞中", infoFont_);
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legendCollidingText_->setPosition(legendX + 20.0f, legendY);
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legendCollidingText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(legendCollidingText_);
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}
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/**
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* @brief 创建指定数量的物理节点
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*/
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void createPhysicsNodes(size_t count) {
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std::random_device rd;
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std::mt19937 gen(rd());
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std::uniform_real_distribution<float> posX(50.0f, screenWidth_ - 50.0f);
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std::uniform_real_distribution<float> posY(50.0f, screenHeight_ - 50.0f);
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std::uniform_real_distribution<float> colorR(0.2f, 0.9f);
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std::uniform_real_distribution<float> colorG(0.2f, 0.9f);
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std::uniform_real_distribution<float> colorB(0.2f, 0.9f);
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for (size_t i = 0; i < count; ++i) {
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Color color(colorR(gen), colorG(gen), colorB(gen), 0.7f);
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auto node = makePtr<PhysicsNode>(20.0f, color, static_cast<int>(i));
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node->setPosition(Vec2(posX(gen), posY(gen)));
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addChild(node);
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}
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}
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/**
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* @brief 获取物理节点数量
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*/
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size_t getPhysicsNodeCount() const {
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size_t count = 0;
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for (const auto &child : children()) {
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if (dynamic_cast<PhysicsNode *>(child.get())) {
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++count;
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}
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}
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return count;
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}
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/**
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* @brief 获取所有物理节点
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*/
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std::vector<PhysicsNode *> getPhysicsNodes() const {
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std::vector<PhysicsNode *> nodes;
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for (const auto &child : children()) {
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if (auto node = dynamic_cast<PhysicsNode *>(child.get())) {
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nodes.push_back(node);
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}
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}
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return nodes;
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}
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/**
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* @brief 添加节点
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*/
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void addNodes(size_t count) {
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size_t currentCount = getPhysicsNodeCount();
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if (currentCount + count > 5000) {
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E2D_LOG_WARN("节点数量已达上限(5000)");
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return;
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}
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createPhysicsNodes(count);
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E2D_LOG_INFO("添加 {} 个节点，当前总数: {}", count, getPhysicsNodeCount());
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}
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/**
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* @brief 移除节点
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*/
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void removeNodes(size_t count) {
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auto physicsNodes = getPhysicsNodes();
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if (count >= physicsNodes.size()) {
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count = physicsNodes.size();
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}
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if (count == 0)
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return;
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// 从后往前移除指定数量的节点
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for (size_t i = 0; i < count; ++i) {
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// 找到最后一个物理节点对应的子节点并移除
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for (auto it = children().rbegin(); it != children().rend(); ++it) {
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if (dynamic_cast<PhysicsNode *>(it->get())) {
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removeChild(*it);
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break;
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}
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}
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}
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E2D_LOG_INFO("移除 {} 个节点，当前总数: {}", count, getPhysicsNodeCount());
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}
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/**
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* @brief 切换空间索引策略
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*/
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void toggleSpatialStrategy() {
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auto &spatialManager = getSpatialManager();
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SpatialStrategy currentStrategy = spatialManager.getCurrentStrategy();
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if (currentStrategy == SpatialStrategy::QuadTree) {
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spatialManager.setStrategy(SpatialStrategy::SpatialHash);
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E2D_LOG_INFO("切换到空间哈希策略");
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} else {
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spatialManager.setStrategy(SpatialStrategy::QuadTree);
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E2D_LOG_INFO("切换到四叉树策略");
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}
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}
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/**
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* @brief 使用引擎自带的空间索引进行碰撞检测
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*
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* 关键方法：
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* - Scene::queryCollisions() - 查询场景中所有碰撞的节点对
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* - SpatialManager::queryCollisions() - 空间管理器的碰撞检测
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*/
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void performCollisionDetection() {
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// 清除之前的碰撞状态
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for (const auto &child : children()) {
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if (auto node = dynamic_cast<PhysicsNode *>(child.get())) {
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node->setColliding(false);
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}
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}
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// 使用引擎自带的空间索引进行碰撞检测
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// 这是核心：Scene::queryCollisions() 会自动使用 SpatialManager
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auto collisions = queryCollisions();
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stats_.collisionCount = collisions.size();
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// 标记碰撞的节点
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for (const auto &[nodeA, nodeB] : collisions) {
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if (auto boxA = dynamic_cast<PhysicsNode *>(nodeA)) {
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boxA->setColliding(true);
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}
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if (auto boxB = dynamic_cast<PhysicsNode *>(nodeB)) {
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boxB->setColliding(true);
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}
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}
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}
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/**
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* @brief 更新UI文本内容
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*/
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void updateUI() {
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if (!nodeCountText_)
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return;
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auto &app = Application::instance();
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// 使用 setFormat 格式化文本
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nodeCountText_->setFormat("节点数量: %zu", stats_.nodeCount);
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strategyText_->setFormat("索引策略: %s", stats_.strategyName);
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collisionText_->setFormat("碰撞对数: %zu", stats_.collisionCount);
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updateTimeText_->setFormat("更新时间: %.2f ms", stats_.updateTime);
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collisionTimeText_->setFormat("碰撞检测: %.2f ms", stats_.collisionTime);
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renderTimeText_->setFormat("渲染时间: %.2f ms", stats_.renderTime);
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fpsText_->setFormat("FPS: %u", app.fps());
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}
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/**
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* @brief 绘制图例方块
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*/
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void drawLegend(RenderBackend &renderer) {
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float legendX = screenWidth_ - 200.0f;
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float legendY = 20.0f + 25.0f; // 在标题下方
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// 绘制正常状态方块
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renderer.fillRect(Rect(legendX, legendY, 15.0f, 15.0f),
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Color(0.5f, 0.5f, 0.9f, 0.7f));
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legendY += 25.0f;
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||
|
||
// 绘制碰撞状态方块
|
||
renderer.fillRect(Rect(legendX, legendY, 15.0f, 15.0f),
|
||
Color(1.0f, 0.2f, 0.2f, 0.9f));
|
||
}
|
||
|
||
PerformanceStats stats_;
|
||
float screenWidth_ = 1280.0f;
|
||
float screenHeight_ = 720.0f;
|
||
|
||
Ptr<FontAtlas> titleFont_;
|
||
Ptr<FontAtlas> infoFont_;
|
||
|
||
// UI 文本组件
|
||
Ptr<Text> titleText_;
|
||
Ptr<Text> nodeCountText_;
|
||
Ptr<Text> strategyText_;
|
||
Ptr<Text> collisionText_;
|
||
Ptr<Text> updateTimeText_;
|
||
Ptr<Text> collisionTimeText_;
|
||
Ptr<Text> renderTimeText_;
|
||
Ptr<Text> fpsText_;
|
||
Ptr<Text> helpTitleText_;
|
||
Ptr<Text> helpAddText_;
|
||
Ptr<Text> helpRemoveText_;
|
||
Ptr<Text> helpToggleText_;
|
||
Ptr<Text> helpExitText_;
|
||
Ptr<Text> legendTitleText_;
|
||
Ptr<Text> legendNormalText_;
|
||
Ptr<Text> legendCollidingText_;
|
||
};
|
||
|
||
// ============================================================================
|
||
// 程序入口
|
||
// ============================================================================
|
||
|
||
int main(int argc, char **argv) {
|
||
Logger::init();
|
||
Logger::setLevel(LogLevel::Debug);
|
||
|
||
E2D_LOG_INFO("========================");
|
||
E2D_LOG_INFO("Easy2D 引擎空间索引演示");
|
||
E2D_LOG_INFO("========================");
|
||
|
||
auto &app = Application::instance();
|
||
|
||
AppConfig config;
|
||
config.title = "Easy2D - 引擎空间索引演示";
|
||
config.width = 1280;
|
||
config.height = 720;
|
||
config.vsync = true;
|
||
config.fpsLimit = 60;
|
||
|
||
if (!app.init(config)) {
|
||
E2D_LOG_ERROR("应用初始化失败！");
|
||
return -1;
|
||
}
|
||
|
||
app.enterScene(makePtr<SpatialIndexDemoScene>());
|
||
|
||
E2D_LOG_INFO("开始主循环...");
|
||
|
||
app.run();
|
||
|
||
E2D_LOG_INFO("应用结束");
|
||
|
||
return 0;
|
||
}
|