RRV - Radiosity Renderer and Visualizer (C++, OpenGL)

/*
 * Copyright (C) 2007 TODO
 *
 * This file is part of rrv (Radiosity Renderer and Visualizer).
 *
 * rrv is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * rrv is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with rrv.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#ifndef PATCHSEQUENCEENUMERATOR_H
#define PATCHSEQUENCEENUMERATOR_H
 
/**
 * @file PatchSequenceEnumerator.h
 * @brief Class PatchSequenceEnumerator - tree-topology patch enumerator.
 * @author xdudka00
 * @date 2007-11-17
 */
 
#include <vector>
 
struct Triangle;
class TriangleSet;
 
/**
 * Leaf nodes are instances of DirectPatchSequenceEnumerator and
 * other nodes are instances of IndirectPatchSequenceEnumerator.
 * @brief Tree-topology patch enumerator.
 */
class PatchSequenceEnumerator {
	public:
		virtual ~PatchSequenceEnumerator();
 
		/**
		 * @brief Return current patch and move to the next one.
		 * @return Return current patch (before move).
		 * Return 0 if there is no current patch (behind range).
		 */
		virtual Triangle* nextPatch() =0;
 
		/**
		 * @brief Move enumerator to first patch.
		 */
		virtual void reset() =0;
};
 
/**
 * See PatchSequenceEnumerator documentation.
 * @brief Class for leaf nodes of PatchSequenceEnumerator object tree.
 */
class DirectPatchSequenceEnumerator: public PatchSequenceEnumerator {
	public:
		/**
		 * @brief Create direct patch enumerator.
		 * @param tset TriangleSet to create enumerator for.
		 */
		DirectPatchSequenceEnumerator(TriangleSet *tset);
		virtual Triangle* nextPatch();
		virtual void reset();
 
	private:
		TriangleSet &tset_;
		int current_;
		int size_;
};
 
/**
 * See PatchSequenceEnumerator documentation.
 * @brief Class for non-leaf nodes of PatchSequenceEnumerator object tree.
 */
class IndirectPatchSequenceEnumerator: public PatchSequenceEnumerator {
	public:
		IndirectPatchSequenceEnumerator();
		virtual ~IndirectPatchSequenceEnumerator();
		virtual Triangle* nextPatch();
		virtual void reset();
 
		/**
		 * @brief Add child node of PatchSequenceEnumerator object tree.
		 * @param patchEnumerator Child node to add.
		 */
		void add(PatchSequenceEnumerator *patchEnumerator);
 
	private:
		typedef std::vector<PatchSequenceEnumerator *> TContainer;
		TContainer container_;
		int current_;
};
 
#endif // PATCHSEQUENCEENUMERATOR_H