From 89acc4653fe7ea3a76dd49711b3ac6b704ed509d Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Thu, 6 Oct 2022 09:49:23 +0200
Subject: a

---
 src/wall-mesh.hpp | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 src/wall-mesh.hpp

(limited to 'src/wall-mesh.hpp')

diff --git a/src/wall-mesh.hpp b/src/wall-mesh.hpp
new file mode 100644
index 00000000..ce1ff30a
--- /dev/null
+++ b/src/wall-mesh.hpp
@@ -0,0 +1,47 @@
+#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();
+    void draw(tile_shader& shader, chunk& c);
+
+private:
+    static constexpr auto COUNT = TILE_MAX_DIM*2 * TILE_MAX_DIM*2;
+
+    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 vertex_array = std::array<quad, COUNT>;
+    using texture_array = std::array<GL::RectangleTexture*, COUNT>;
+
+    static void maybe_add_tile(vertex_array& data, texture_array& textures, std::size_t& pos,
+                         tile& x, local_coords pt);
+    static void add_wall(vertex_array& data, texture_array& textures, std::size_t& pos,
+                         tile_image& img, const position_array& positions);
+
+    GL::Mesh _mesh;
+    GL::Buffer _vertex_buffer{vertex_array{}, Magnum::GL::BufferUsage::DynamicDraw},
+               _index_buffer{make_index_array(), Magnum::GL::BufferUsage::StaticDraw};
+    static std::array<std::array<UnsignedShort, 6>, COUNT> make_index_array();
+};
+
+} // namespace Magnum::Examples
-- 
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