1 files changed, 45 insertions, 0 deletions
diff --git a/gfx/frustum.h b/gfx/frustum.h
new file mode 100644
index 0000000..a2d90e9
--- /dev/null
+++ b/gfx/frustum.h
@@ -0,0 +1,45 @@
+#pragma once
+
+#include "aabb.h"
+#include "config/types.h"
+#include <array>
+#include <glm/mat4x4.hpp>
+
+class Frustum {
+public:
+	Frustum(const GlobalPosition3D & pos, const glm::mat4 & view, const glm::mat4 & projection);
+
+	[[nodiscard]] auto &
+	getFrustumPlanes() const
+	{
+		return planes;
+	}
+
+	[[nodiscard]] auto &
+	getViewProjection() const
+	{
+		return viewProjection;
+	}
+
+	[[nodiscard]] auto
+	getPosition() const
+	{
+		return position;
+	}
+
+	void updateView(const glm::mat4 & view);
+
+	using BoundingBox = AxisAlignedBoundingBox<GlobalDistance>;
+	[[nodiscard]] bool contains(const BoundingBox &) const;
+	[[nodiscard]] bool shadedBy(const BoundingBox &) const;
+
+protected:
+	static constexpr size_t FACES = 6;
+	void updateCache();
+	[[nodiscard]] bool boundByPlanes(const BoundingBox &, size_t nplanes) const;
+
+	GlobalPosition3D position;
+	glm::mat4 view, projection;
+	glm::mat4 viewProjection, inverseViewProjection;
+	std::array<glm::vec4, FACES> planes;
+};