circle.hpp

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#pragma once
#include "le2d/geometry.hpp"
#include "le2d/vertex_array.hpp"
#include <kvf/color.hpp>
#include <kvf/rect.hpp>
 
namespace le::shape {
struct CircleParams {
    kvf::Color const color{kvf::white_v};
    std::int32_t resolution{128};
};
 
class Circle : public IGeometry {
  public:
    using Params = CircleParams;
 
    static constexpr auto default_diameter_v = default_length_v;
 
    explicit(false) Circle(float const diameter = default_diameter_v, CircleParams const& params = {}) { create(diameter, params); }
 
    [[nodiscard]] auto get_vertices() const -> std::span<Vertex const> final { return m_verts.vertices; }
    [[nodiscard]] auto get_indices() const -> std::span<std::uint32_t const> final { return m_verts.indices; }
    [[nodiscard]] auto get_topology() const -> vk::PrimitiveTopology final { return vk::PrimitiveTopology::eTriangleFan; }
 
    void create(float diameter = default_diameter_v, Params const& params = {});
 
    [[nodiscard]] auto get_diameter() const -> float { return m_diameter; }
    [[nodiscard]] auto get_size() const -> glm::vec2 { return glm::vec2{get_diameter()}; }
 
    [[nodiscard]] auto get_vertex_array() const -> VertexArray const& { return m_verts; }
 
  private:
    VertexArray m_verts{};
    float m_diameter{};
};
} // namespace le::shape