init

demo/DemoScene.h

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+#pragma once
+#include "hd2d/Camera.h"
+#include "hd2d/Scene.h"
+#include "hd2d/Weather.h"
+
+#include <array>
+#include <random>
+#include <string>
+#include <vector>
+// Meadow diorama: terraced grass, a cliff ridge with steps, a pond crossed by
+// a stone bridge with burning braziers, 3D trees/bushes/rocks, weather and a
+// WASD-controlled pixel-art player sprite.
+class DemoScene {
+public:
+    bool load(const std::string& assetDir);
+    // `move`: x = screen right, y = screen up (camera-relative), length <= 1.
+    void update(float dt, float time, glm::vec2 move, const hd2d::Camera& camera);
+    void placePlayer(glm::vec2 xz);
+
+    hd2d::Scene scene;
+    glm::vec3 playerPos{0.0f};
+    hd2d::Weather weather;  // call weather.update() each frame before rendering
+
+private:
+    struct Obstacle {
+        glm::vec2 pos;
+        float radius;
+    };
+    void buildTerrain();
+    void scatterProps();
+    bool walkable(glm::vec2 from, glm::vec2 to) const;
+    bool occupied(glm::vec2 p, float r) const;
+    float groundHeight(glm::vec2 p) const;  // terrain or bridge deck
+
+    hd2d::Terrain terrain_;
+    hd2d::Water water_;
+    hd2d::ParticleSystem particles_;
+    hd2d::BillboardBatch tallGrass_, tufts_, flowers_, player_;  // pixel-art sprites
+    hd2d::ModelLibrary models_;                                  // 3D scenery
+    std::array<hd2d::ModelBatch, 2> oaks_, pines_, bushes_, rocks_;  // two model variants each
+    hd2d::ModelBatch bridge_;
+    hd2d::GroundOcclusion groundAO_;
+    std::vector<Obstacle> obstacles_;
+    std::vector<unsigned char> tallGrassMask_;
+    std::mt19937 rng_{42};
+    float playerSpeed_ = 4.2f;
+    float walkPhase_ = 0.0f;
+    float stepTimer_ = 0.0f;
+    float facing_ = 0.0f;
+};