adjacency.hpp

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#ifndef EAGINE_SHAPES_ADJACENCY_HPP
#define EAGINE_SHAPES_ADJACENCY_HPP
 
#include "delegated.hpp"
#include "topology.hpp"
#include <eagine/config/basic.hpp>
 
namespace eagine {
namespace shapes {
//------------------------------------------------------------------------------
class triangle_adjacency_gen : public delegated_gen {
public:
    triangle_adjacency_gen(
      std::shared_ptr<generator> gen,
      drawing_variant var) noexcept
      : delegated_gen{std::move(gen)} {
        _topology(var);
    }
 
    triangle_adjacency_gen(std::shared_ptr<generator> gen) noexcept
      : triangle_adjacency_gen{std::move(gen), 0} {}
 
    auto index_type(const topology&) -> index_data_type;
    auto index_type(drawing_variant) -> index_data_type override;
 
    auto index_count(const topology&) -> span_size_t;
    auto index_count(drawing_variant) -> span_size_t override;
 
    void indices(drawing_variant, span<std::uint8_t> dest) override;
 
    void indices(drawing_variant, span<std::uint16_t> dest) override;
 
    void indices(drawing_variant, span<std::uint32_t> dest) override;
 
    auto operation_count(drawing_variant) -> span_size_t override;
 
    void instructions(drawing_variant, span<draw_operation> ops) override;
 
private:
    auto _topology(drawing_variant var) noexcept -> topology&;
 
    template <typename T>
    void _indices(drawing_variant, span<T> dest) noexcept;
 
    flat_map<drawing_variant, topology> _topologies;
};
//------------------------------------------------------------------------------
static inline auto add_triangle_adjacency(
  std::shared_ptr<generator> gen,
  drawing_variant var) noexcept {
    return std::make_unique<triangle_adjacency_gen>(std::move(gen), var);
}
//------------------------------------------------------------------------------
static inline auto
add_triangle_adjacency(std::shared_ptr<generator> gen) noexcept {
    return std::make_unique<triangle_adjacency_gen>(std::move(gen));
}
//------------------------------------------------------------------------------
} // namespace shapes
} // namespace eagine
 
#if !EAGINE_LINK_LIBRARY || defined(EAGINE_IMPLEMENTING_LIBRARY)
#include <eagine/shapes/adjacency.inl>
#endif
 
#endif // EAGINE_SHAPES_ADJACENCY_HPP