280 lines
8.2 KiB
C++
280 lines
8.2 KiB
C++
#include <cmath>
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#include <extra2d/extra2d.h>
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using namespace extra2d;
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// ============================================================================
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// 碰撞测试节点 - 有实际边界框
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// ============================================================================
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class CollisionBox : public Node {
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public:
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CollisionBox(float width, float height, const Color &color)
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: width_(width), height_(height), color_(color), isColliding_(false) {
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// 启用空间索引，这是碰撞检测的关键
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setSpatialIndexed(true);
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}
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void setColliding(bool colliding) { isColliding_ = colliding; }
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Rect getBoundingBox() const override {
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// 返回实际的矩形边界
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Vec2 pos = getPosition();
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return Rect(pos.x - width_ / 2, pos.y - height_ / 2, width_, height_);
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}
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void onRender(RenderBackend &renderer) override {
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Vec2 pos = getPosition();
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// 绘制填充矩形
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Color fillColor = isColliding_ ? Color(1.0f, 0.2f, 0.2f, 0.8f) : color_;
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renderer.fillRect(
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Rect(pos.x - width_ / 2, pos.y - height_ / 2, width_, height_),
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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(1.0f, 1.0f, 1.0f, 0.5f);
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float borderWidth = isColliding_ ? 3.0f : 2.0f;
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renderer.drawRect(
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Rect(pos.x - width_ / 2, pos.y - height_ / 2, width_, height_),
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borderColor, borderWidth);
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}
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private:
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float width_, height_;
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Color color_;
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bool isColliding_;
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};
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// ============================================================================
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// 碰撞检测场景
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// ============================================================================
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class CollisionDemoScene : public Scene {
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public:
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void onEnter() override {
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E2D_LOG_INFO("CollisionDemoScene::onEnter - 碰撞检测演示");
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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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// 获取屏幕中心
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auto &app = Application::instance();
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float centerX = app.getConfig().width / 2.0f;
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float centerY = app.getConfig().height / 2.0f;
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// 创建静态碰撞框
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createStaticBoxes(centerX, centerY);
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// 创建移动的中心方块
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centerBox_ =
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shared<CollisionBox>(80.0f, 80.0f, Color(0.2f, 0.6f, 1.0f, 0.8f));
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centerBox_->setPosition(Vec2(centerX, centerY));
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addChild(centerBox_);
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// 加载字体并创建UI
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loadFonts();
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E2D_LOG_INFO("创建了 {} 个碰撞框", boxes_.size() + 1);
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}
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void onUpdate(float dt) override {
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Scene::onUpdate(dt);
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// 旋转中心方块
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rotationAngle_ += rotationSpeed_ * dt;
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if (rotationAngle_ >= 360.0f)
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rotationAngle_ -= 360.0f;
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// 让中心方块沿圆形路径移动
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float radius = 150.0f;
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float rad = rotationAngle_ * 3.14159f / 180.0f;
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auto &app = Application::instance();
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Vec2 center =
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Vec2(app.getConfig().width / 2.0f, app.getConfig().height / 2.0f);
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centerBox_->setPosition(Vec2(center.x + std::cos(rad) * radius,
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center.y + std::sin(rad) * radius));
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centerBox_->setRotation(rotationAngle_);
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// 执行碰撞检测
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performCollisionDetection();
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// 更新UI文本
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updateUI();
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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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}
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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
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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", 60, true);
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infoFont_ = resources.loadFont("assets/font.ttf", 28, true);
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// 创建标题文本
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titleText_ = Text::create("碰撞检测演示", titleFont_);
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titleText_->setPosition(50.0f, 30.0f);
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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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// 创建说明文本
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descText_ = Text::create("蓝色方块旋转并检测碰撞", infoFont_);
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descText_->setPosition(50.0f, 80.0f);
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descText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(descText_);
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collideHintText_ = Text::create("红色 = 检测到碰撞", infoFont_);
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collideHintText_->setPosition(50.0f, 105.0f);
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collideHintText_->setTextColor(Color(1.0f, 0.5f, 0.5f, 1.0f));
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addChild(collideHintText_);
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// 创建动态统计文本
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collisionText_ = Text::create("", infoFont_);
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collisionText_->setPosition(50.0f, 150.0f);
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collisionText_->setTextColor(Color(1.0f, 1.0f, 0.5f, 1.0f));
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addChild(collisionText_);
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fpsText_ = Text::create("", infoFont_);
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fpsText_->setPosition(50.0f, 175.0f);
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fpsText_->setTextColor(Color(0.8f, 1.0f, 0.8f, 1.0f));
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addChild(fpsText_);
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// 创建退出提示文本
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float screenHeight =
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static_cast<float>(Application::instance().getConfig().height);
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exitHintText_ = Text::create("按 + 键退出", infoFont_);
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exitHintText_->setPosition(50.0f, screenHeight - 50.0f);
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exitHintText_->setTextColor(Color(0.8f, 0.8f, 0.8f, 1.0f));
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addChild(exitHintText_);
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}
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/**
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* @brief 更新UI文本
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*/
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void updateUI() {
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auto &app = Application::instance();
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// 使用 setFormat 更新动态文本
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collisionText_->setFormat("碰撞数: %zu", collisionCount_);
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fpsText_->setFormat("FPS: %u", app.fps());
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}
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/**
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* @brief 创建静态碰撞框
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*/
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void createStaticBoxes(float centerX, float centerY) {
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// 创建围绕中心的静态碰撞框
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std::vector<std::pair<Vec2, Color>> positions = {
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{Vec2(centerX - 200, centerY - 150), Color(0.3f, 1.0f, 0.3f, 0.7f)},
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{Vec2(centerX + 200, centerY - 150), Color(1.0f, 0.3f, 0.3f, 0.7f)},
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{Vec2(centerX - 200, centerY + 150), Color(0.3f, 0.3f, 1.0f, 0.7f)},
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{Vec2(centerX + 200, centerY + 150), Color(1.0f, 1.0f, 0.3f, 0.7f)},
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{Vec2(centerX, centerY - 220), Color(1.0f, 0.3f, 1.0f, 0.7f)},
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{Vec2(centerX, centerY + 220), Color(0.3f, 1.0f, 1.0f, 0.7f)},
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};
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for (const auto &[pos, color] : positions) {
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auto box = shared<CollisionBox>(70.0f, 70.0f, color);
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box->setPosition(pos);
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addChild(box);
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boxes_.push_back(box);
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}
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}
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/**
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* @brief 执行碰撞检测
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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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centerBox_->setColliding(false);
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for (auto &box : boxes_) {
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box->setColliding(false);
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}
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// 使用空间索引进行碰撞检测
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auto collisions = queryCollisions();
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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<CollisionBox *>(nodeA)) {
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boxA->setColliding(true);
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}
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if (auto boxB = dynamic_cast<CollisionBox *>(nodeB)) {
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boxB->setColliding(true);
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}
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}
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}
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Ptr<CollisionBox> centerBox_;
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std::vector<Ptr<CollisionBox>> boxes_;
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float rotationAngle_ = 0.0f;
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float rotationSpeed_ = 60.0f; // 旋转速度（度/秒）
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size_t collisionCount_ = 0;
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// 字体资源
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Ptr<FontAtlas> titleFont_;
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Ptr<FontAtlas> infoFont_;
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// UI 文本组件
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Ptr<Text> titleText_;
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Ptr<Text> descText_;
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Ptr<Text> collideHintText_;
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Ptr<Text> collisionText_;
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Ptr<Text> fpsText_;
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Ptr<Text> exitHintText_;
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};
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// ============================================================================
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// 程序入口
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// ============================================================================
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int main(int argc, char **argv) {
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// 初始化日志系统
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Logger::init();
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Logger::setLevel(LogLevel::Debug);
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E2D_LOG_INFO("========================");
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E2D_LOG_INFO("Easy2D 碰撞检测演示");
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E2D_LOG_INFO("========================");
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// 获取应用实例
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auto &app = Application::instance();
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// 配置应用
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AppConfig config;
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config.title = "Easy2D - 碰撞检测演示";
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config.width = 1280;
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config.height = 720;
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config.vsync = true;
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config.fpsLimit = 60;
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// 初始化应用
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if (!app.init(config)) {
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E2D_LOG_ERROR("应用初始化失败！");
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return -1;
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}
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// 进入场景
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app.enterScene(shared<CollisionDemoScene>());
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E2D_LOG_INFO("开始主循环...");
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// 运行应用
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app.run();
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E2D_LOG_INFO("应用结束");
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return 0;
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}
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