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src/graphics/render/Skybox.hpp

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+#ifndef GRAPHICS_RENDER_SKYBOX_HPP_
+#define GRAPHICS_RENDER_SKYBOX_HPP_
+
+#include <memory>
+#include <string>
+#include <vector>
+#include "../../typedefs.h"
+#include "../../maths/fastmaths.h"
+
+class Mesh;
+class Shader;
+class Assets;
+class Camera;
+class Batch3D;
+class Framebuffer;
+class GfxContext;
+
+struct skysprite {
+    std::string texture;
+    float phase;
+    float distance;
+    bool emissive;
+};
+
+class Skybox {
+    std::unique_ptr<Framebuffer> fbo;
+    uint size;
+    Shader* shader;
+    bool ready = false;
+    FastRandom random;
+
+    std::unique_ptr<Mesh> mesh;
+    std::unique_ptr<Batch3D> batch3d;
+    std::vector<skysprite> sprites;
+
+    void drawStars(float angle, float opacity);
+    void drawBackground(Camera* camera, Assets* assets, int width, int height);
+public:
+    Skybox(uint size, Shader* shader);
+    ~Skybox();
+
+    void draw(
+        const GfxContext& pctx, 
+        Camera* camera, 
+        Assets* assets, 
+        float daytime,
+        float fog
+    );
+
+    void refresh(const GfxContext& pctx, float t, float mie, uint quality);
+    void bind() const;
+    void unbind() const;
+    bool isReady() const {
+        return ready;
+    }
+};
+
+#endif // GRAPHICS_RENDER_SKYBOX_HPP_