Added GuillotineBinPack algorithm

Former-commit-id: 9f2fb342e7bd9e1b33937a4fd462c993ae5cec3e
2014-11-26 02:35:59 +01:00
parent 62dc2dbdf3
commit 4b2e3370d9
2 changed files with 460 additions and 0 deletions
--- a/include/Nazara/Core/GuillotineBinPack.hpp
+++ b/include/Nazara/Core/GuillotineBinPack.hpp
@@ -0,0 +1,73 @@
+// Copyright (C) 2014 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Core module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+// Implémentation originale de Jukka Jylänki (Merci de sa contribution au domaine public)
+// http://clb.demon.fi/projects/even-more-rectangle-bin-packing
+
+#pragma once
+
+#ifndef NAZARA_GUILLOTINEBINPACK_HPP
+#define NAZARA_GUILLOTINEBINPACK_HPP
+
+#include <Nazara/Prerequesites.hpp>
+#include <Nazara/Core/SparsePtr.hpp>
+#include <Nazara/Math/Rect.hpp>
+#include <vector>
+
+class NAZARA_API NzGuillotineBinPack
+{
+	public:
+		enum FreeRectChoiceHeuristic
+		{
+			RectBestAreaFit,
+			RectBestLongSideFit,
+			RectBestShortSideFit,
+			RectWorstAreaFit,
+			RectWorstLongSideFit,
+			RectWorstShortSideFit
+		};
+
+		enum GuillotineSplitHeuristic
+		{
+			SplitLongerAxis,
+			SplitLongerLeftoverAxis,
+			SplitMaximizeArea,
+			SplitMinimizeArea,
+			SplitShorterAxis,
+			SplitShorterLeftoverAxis
+		};
+
+		NzGuillotineBinPack();
+		NzGuillotineBinPack(unsigned int width, unsigned int height);
+		~NzGuillotineBinPack() = default;
+
+		void Clear();
+
+		void FreeRectangle(const NzRectui& rect);
+
+		unsigned int GetHeight() const;
+		float GetOccupancy() const;
+		NzVector2ui GetSize() const;
+		unsigned int GetWidth() const;
+
+		bool Insert(NzRectui* rects, bool* flipped, unsigned int count, bool merge, FreeRectChoiceHeuristic rectChoice, GuillotineSplitHeuristic splitMethod);
+
+		bool MergeFreeRectangles();
+
+		void Reset();
+		void Reset(unsigned int width, unsigned int height);
+
+	private:
+		void SplitFreeRectAlongAxis(const NzRectui& freeRect, const NzRectui& placedRect, bool splitHorizontal);
+		void SplitFreeRectByHeuristic(const NzRectui& freeRect, const NzRectui& placedRect, GuillotineSplitHeuristic method);
+
+		static int ScoreByHeuristic(int width, int height, const NzRectui& freeRect, FreeRectChoiceHeuristic rectChoice);
+
+		std::vector<NzRectui> m_freeRectangles;
+		float m_occupancy;
+		unsigned int m_height;
+		unsigned int m_width;
+};
+
+#endif // NAZARA_GUILLOTINEBINPACK_HPP