a

1 files changed, 46 insertions, 0 deletions

diff --git a/wall-mesh.hpp b/wall-mesh.hpp
index b1f7be7e..905e7acc 100644
--- a/wall-mesh.hpp
+++ b/wall-mesh.hpp
@@ -1,5 +1,51 @@
 #pragma once
 
+#include "tile.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 chunk;
+
+struct wall_mesh final
+{
+    wall_mesh();
+    wall_mesh(wall_mesh&&) = delete;
+    wall_mesh(const wall_mesh&) = delete;
+
+    void draw(tile_shader& shader, chunk& c);
+
+private:
+    static constexpr auto COUNT = TILE_MAX_DIM*2 * TILE_MAX_DIM*2;
+    static constexpr auto quad_index_count = 6;
+
+    using texcoords_array = std::array<Vector2, 4>;
+    using position_array = std::array<Vector3, 4>;
+
+    struct vertex final {
+        typename texcoords_array::value_type texcoords;
+        typename position_array::value_type  position;
+    };
+
+    using quad = std::array<vertex, 4>;
+    using index_type = std::array<UnsignedShort, 6>;
+    using vertex_array = std::array<quad, COUNT>;
+
+    static void add_tile(vertex_array& data, std::size_t& pos, tile& x, local_coords pt);
+    static void add_wall(vertex_array& data, std::size_t& pos, tile_image& img, const position_array& positions);
+
+    GL::Mesh _mesh;
+    GL::Buffer _vertex_buffer{{}, Magnum::GL::BufferUsage::DynamicDraw},
+               _index_buffer{_index_data, Magnum::GL::BufferUsage::StaticDraw};
+
+    static const std::array<index_type, COUNT> _index_data;
+    static decltype(_index_data) make_index_array();
+};
+
 } // namespace Magnum::Examples