1 files changed, 45 insertions, 0 deletions
diff --git a/floor-mesh.hpp b/floor-mesh.hpp
new file mode 100644
index 00000000..a1b0fac5
--- /dev/null
+++ b/floor-mesh.hpp
@@ -0,0 +1,45 @@
+#pragma once
+#include "defs.hpp"
+#include "tile.hpp"
+#include "tile-atlas.hpp"
+#include <array>
+#include <Corrade/Containers/ArrayViewStl.h>
+#include <Magnum/Magnum.h>
+#include <Magnum/Math/Vector2.h>
+#include <Magnum/GL/Mesh.h>
+#include <Magnum/GL/Buffer.h>
+
+namespace Magnum::Examples {
+
+struct tile_shader;
+struct tile_image;
+
+struct floor_mesh final
+{
+    floor_mesh();
+    floor_mesh(floor_mesh&&) = delete;
+    floor_mesh(const floor_mesh&) = delete;
+
+    void set_tile(tile& x, local_coords pt);
+    void draw(tile_shader& shader);
+
+private:
+    struct vertex_data final {
+        Vector2 texcoords;
+    };
+    using quad_data = std::array<vertex_data, 4>;
+    using vertex_positions_data = std::array<Vector3, 4>;
+    static constexpr auto quad_index_count = std::tuple_size_v<decltype(tile_atlas::indices(0))>;
+    using index_type = std::array<UnsignedShort, quad_index_count>;
+
+    static const std::array<index_type, TILE_COUNT> _index_data;
+    static const std::array<vertex_positions_data, TILE_COUNT> _position_data;
+    std::array<quad_data, TILE_COUNT> _vertex_data = {};
+
+    GL::Mesh _floor_mesh;
+    GL::Buffer _vertex_buffer{_vertex_data, Magnum::GL::BufferUsage::DynamicDraw},
+               _index_buffer{_index_data, Magnum::GL::BufferUsage::StaticDraw},
+               _positions_buffer{_position_data, Magnum::GL::BufferUsage::StaticDraw};
+};
+
+} // namespace Magnum::Examples