rename atlas type filename

1 files changed, 26 insertions, 0 deletions

diff --git a/atlas.hpp b/atlas.hpp
new file mode 100644
index 00000000..4d747137
--- /dev/null
+++ b/atlas.hpp
@@ -0,0 +1,26 @@
+#pragma once
+#include <Magnum/Math/Vector.h>
+#include <Magnum/Math/Vector2.h>
+#include <Magnum/GL/Texture.h>
+#include <Magnum/Trade/ImageData.h>
+#include <array>
+
+namespace Magnum::Examples {
+using Vector2i = Math::Vector<2, int>;
+
+struct atlas_texture final
+{
+    atlas_texture(const Trade::ImageData2D& img, Vector2i dims);
+    std::array<Vector2, 4> texcoords_for_id(int id) const;
+    static std::array<Vector3, 4> floor_quad(Vector3 center, Vector2 size);
+    static std::array<UnsignedShort, 6> indices(int N);
+    GL::Texture2D& texture() { return tex_; }
+
+    atlas_texture(const atlas_texture&) = delete;
+    atlas_texture& operator=(const atlas_texture&) = delete;
+private:
+    GL::Texture2D tex_;
+    Vector2i size_, dims_, tile_size_;
+};
+
+} // namespace Magnum::Examples