1 files changed, 47 insertions, 0 deletions
diff --git a/src/GFX/Util/Primitives.hpp b/src/GFX/Util/Primitives.hpp
new file mode 100644
index 0000000..b96bc00
--- /dev/null
+++ b/src/GFX/Util/Primitives.hpp
@@ -0,0 +1,47 @@
+#pragma once
+
+#include "../../Common/Sizes.hpp"
+#include "../../Math/AABB.hpp"
+#include <array>
+
+namespace MC::GFX::Util::Primitives {
+
+class FaceSet {
+public:
+    enum Value : U8 {
+        Front = 1 << 0,
+        Back = 1 << 1,
+        Top = 1 << 2,
+        Bottom = 1 << 3,
+        Right = 1 << 4,
+        Left = 1 << 5,
+    };
+
+    static constexpr UInt Size = 6;
+
+    FaceSet() = default;
+    FaceSet(const Value set) : m_set(set) {}
+
+    operator Value() const { return m_set; }
+
+    static FaceSet all() {
+        return static_cast<Value>(Front | Back | Top | Bottom | Right | Left);
+    }
+private:
+    Value m_set;
+};
+
+template <uint N>
+struct Primitive {
+    std::array<Vector<3, F32>, N> positions;
+    std::array<Vector<3, F32>, N> normals;
+    std::array<U32, N + N / 2> indices;
+};
+
+using PlanePrimitive = Primitive<4>;
+PlanePrimitive plane(Math::AABB aabb, FaceSet face);
+
+using BoxPrimitive = Primitive<4 * 6>;
+BoxPrimitive box(Math::AABB aabb, FaceSet faces = FaceSet::all());
+
+}