VirtualGeometryRenderer.h

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#pragma once
 
#include "virtualgeometry/VirtualGeometryAsset.h"
#include "virtualgeometry/VirtualGeometryBackend.h"
#include "virtualgeometry/Builder.h"
 
#include <cstdint>
#include <vector>
 
namespace eve::data {
class ByteData;
}
 
namespace eve::virtualgeometry {
 
class EVENGINE_API_DOMAINS VirtualGeometryRenderer {
public:
    VirtualGeometryRenderer();
    ~VirtualGeometryRenderer();
 
    VirtualGeometryRenderer(const VirtualGeometryRenderer &) = delete;
    VirtualGeometryRenderer &operator=(const VirtualGeometryRenderer &) = delete;
 
    bool isReady() const { return backend_.state != nullptr; }
 
    // ---- build (preprocess + upload) ----
    bool build(const float *positions, int vertexCount, const std::uint32_t *indices, int indexCount);
    bool build(const VirtualGeometryBuilder::MeshInput &in);
    bool buildIcosphere(int subdiv);
 
    // ---- per-frame ----
    void setViewport(int width, int height, float fovYDeg, float errorPx = 1.0f);
    void setCamera(const float view[16], const float proj[16], const float model[16],
                   const float camPos[3]);
    void setCameraSimple(float camX, float camY, float camZ, float nearZ = 0.1f, float farZ = 100.f);
    void setModelYaw(float yaw);
    int update();
    bool resolve(unsigned char *outRgba, int &outW, int &outH);
    eve::data::ByteData *resolveByteData();
    int getViewWidth() const { return width_; }
    int getViewHeight() const { return height_; }
 
    // ---- stats ----
    int getClusterCount() const;
    int getVisibleCount() const { return lastVisible_; }
    int getTotalTriangleCount() const;
    int getLodLevel(int clusterId) const;
    int getMaxLodLevel() const;
 
private:
    void buildIcosphereInternal(int subdiv);
    void updateUniforms();
 
    VgBackend backend_;
    VirtualGeometryAsset asset_;
    VirtualGeometryBuilder::Options builderOptions_{};
    VgUniforms uniforms_{};
    int width_ = 1, height_ = 1;
    int lastVisible_ = 0;
    int visibleCapacity_ = 4096;
    float modelYaw_ = 0.f;
};
 
}  // namespace eve::virtualgeometry