diff options
Diffstat (limited to 'src/wireframe-mesh.hpp')
| -rw-r--r-- | src/wireframe-mesh.hpp | 37 |
1 files changed, 14 insertions, 23 deletions
diff --git a/src/wireframe-mesh.hpp b/src/wireframe-mesh.hpp index 28619e90..855e673a 100644 --- a/src/wireframe-mesh.hpp +++ b/src/wireframe-mesh.hpp @@ -14,67 +14,58 @@ namespace Magnum::Examples { struct tile_shader; -namespace wireframe_traits { +namespace wireframe +{ template<typename T> concept traits = requires (const T& x) { {T::num_vertices} -> std::convertible_to<std::size_t>; - {T::num_indices} -> std::convertible_to<std::size_t>; {x.primitive} -> std::convertible_to<GL::MeshPrimitive>; - {x.make_vertex_positions_array() } -> std::same_as<std::array<Vector3, T::num_vertices>>; - {x.make_index_array() } -> std::same_as<std::array<UnsignedShort, T::num_indices>>; + {x.make_vertex_array() } -> std::same_as<std::array<Vector3, T::num_vertices>>; }; struct null final { static constexpr auto primitive = GL::MeshPrimitive::Triangles; - static constexpr std::size_t num_vertices = 0, num_indices = 0; + static constexpr std::size_t num_vertices = 0; static GL::RectangleTexture make_constant_texture(); - static std::array<Vector3, 0> make_vertex_positions_array() { return {}; } - static std::array<UnsignedShort, 0> make_index_array() { return {}; } + static std::array<Vector3, 0> make_vertex_array() { return {}; } }; struct quad final { - quad(Vector3 center, Vector2 size = {TILE_SIZE[0], TILE_SIZE[1]}); + quad(Vector3 center, Vector2 size); constexpr quad() = default; static constexpr std::size_t num_vertices = 4; - static constexpr std::size_t num_indices = 0; static constexpr GL::MeshPrimitive primitive = GL::MeshPrimitive::LineLoop; using vertex_array = std::array<Vector3, num_vertices>; - using index_array = std::array<UnsignedShort, num_indices>; - - vertex_array make_vertex_positions_array() const; - static index_array make_index_array() { return {}; } + vertex_array make_vertex_array() const; private: Vector3 center = {}; Vector2 size = { TILE_SIZE[0], TILE_SIZE[1] }; }; -} // namespace wireframe_traits - +} // namespace wireframe -template<wireframe_traits::traits T> +template<wireframe::traits T> struct wireframe_mesh final { wireframe_mesh(); void draw(tile_shader& shader, T traits); private: - GL::Buffer _positions_buffer{}, - _texcoords_buffer{std::array<Vector2, T::num_vertices>{}}, - _index_buffer{T::num_indices == 0 ? GL::Buffer{NoCreate} : GL::Buffer{}}; - GL::RectangleTexture _texture = wireframe_traits::null::make_constant_texture(); + GL::Buffer _vertex_buffer{}, _texcoords_buffer{std::array<Vector2, T::num_vertices>{}}; + GL::RectangleTexture _texture = wireframe::null::make_constant_texture(); GL::Mesh _mesh; }; -extern template struct wireframe_mesh<wireframe_traits::null>; -extern template struct wireframe_mesh<wireframe_traits::quad>; +extern template struct wireframe_mesh<wireframe::null>; +extern template struct wireframe_mesh<wireframe::quad>; -using wireframe_quad_mesh = wireframe_mesh<wireframe_traits::quad>; +using wireframe_quad_mesh = wireframe_mesh<wireframe::quad>; } // namespace Magnum::Examples |
