quad.hpp

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#pragma once
#include "le2d/geometry.hpp"
#include <kvf/color.hpp>
#include <kvf/rect.hpp>
 
namespace le::shape {
class IQuad : public IGeometry {
  public:
    static constexpr std::size_t vertex_count_v{4};
 
    static constexpr auto default_size_v = glm::vec2{default_length_v};
 
    explicit(false) IQuad(glm::vec2 const size = default_size_v) { create(size); }
 
    [[nodiscard]] auto get_vertices() const -> std::span<Vertex const> final { return m_vertices; }
 
    void create(glm::vec2 size = default_size_v);
    void create(kvf::Rect<> const& rect, kvf::UvRect const& uv = kvf::uv_rect_v, kvf::Color color = kvf::white_v);
 
    [[nodiscard]] auto get_rect() const -> kvf::Rect<>;
    [[nodiscard]] auto get_uv() const -> kvf::UvRect;
    [[nodiscard]] auto get_size() const -> glm::vec2 { return get_rect().size(); }
    [[nodiscard]] auto get_origin() const -> glm::vec2 { return get_rect().center(); }
 
  private:
    std::array<Vertex, vertex_count_v> m_vertices{};
};
 
class Quad : public IQuad {
  public:
    static constexpr auto indices_v = std::array{0u, 1u, 2u, 2u, 3u, 0u};
 
    using IQuad::IQuad;
 
    [[nodiscard]] auto get_indices() const -> std::span<std::uint32_t const> final { return indices_v; }
    [[nodiscard]] auto get_topology() const -> vk::PrimitiveTopology final { return vk::PrimitiveTopology::eTriangleList; }
};
 
class LineRect : public IQuad {
  public:
    static constexpr auto indices_v = std::array{0u, 1u, 2u, 3u, 0u};
 
    using IQuad::IQuad;
 
    [[nodiscard]] auto get_indices() const -> std::span<std::uint32_t const> final { return indices_v; }
    [[nodiscard]] auto get_topology() const -> vk::PrimitiveTopology final { return vk::PrimitiveTopology::eLineStrip; }
};
} // namespace le::shape