VegetationAsset.h

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#pragma once
#include <cstdint>
#include <memory>
#include "common/Result.h"
 
namespace eve {
class AssetRef;
}
namespace eve::asset {
struct CanonicalMeshData;
struct CanonicalMeshLimits;
struct EvpackCapabilities;
class EvpackResourceReader;
}  // namespace eve::asset
namespace eve::graphics {
class Graphics;
class Mesh;
class VegetationField;
struct VegetationMotion;
struct VegetationGeometry;
}  // namespace eve::graphics
namespace eve::asset_graphics {
class EVENGINE_API_WORLD VegetationAsset {
public:
    ~VegetationAsset();
    VegetationAsset(const VegetationAsset&)            = delete;
    VegetationAsset& operator=(const VegetationAsset&) = delete;
    [[nodiscard]] static Result<std::unique_ptr<VegetationAsset>> fromCanonical(const asset::CanonicalMeshData& mesh);
    [[nodiscard]] static Result<std::unique_ptr<VegetationAsset>> load(const asset::EvpackResourceReader& reader,
                                                                       const AssetRef&                    ref,
                                                                       const asset::EvpackCapabilities&   capabilities,
                                                                       const asset::CanonicalMeshLimits&  limits);
    std::uint32_t vertexCount() const noexcept;
    [[nodiscard]] Result<graphics::VegetationGeometry> evaluate(const graphics::VegetationField&  field,
                                                                const graphics::VegetationMotion& motion) const;
    [[nodiscard]] Result<graphics::Mesh*> createMesh(graphics::Graphics&               graphics,
                                                     const graphics::VegetationField&  field,
                                                     const graphics::VegetationMotion& motion) const;
    [[nodiscard]] Result<graphics::Mesh*> createGpuFieldMesh(graphics::Graphics& graphics) const;
    [[nodiscard]] Result<void> updateMesh(graphics::Graphics& graphics, graphics::Mesh& mesh,
                                          const graphics::VegetationField&  field,
                                          const graphics::VegetationMotion& motion) const;
 
private:
    struct Impl;
    explicit VegetationAsset(std::unique_ptr<Impl> impl);
    std::unique_ptr<Impl> impl_;
};
}  // namespace eve::asset_graphics