/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef __FREESTYLE_WINGED_EDGE_BUILDER_H__
#define __FREESTYLE_WINGED_EDGE_BUILDER_H__

/** \file blender/freestyle/intern/winged_edge/WingedEdgeBuilder.h
 *  \ingroup freestyle
 *  \brief Class to render a WingedEdge data structure from a polyhedral data structure organized in nodes
 *         of a scene graph
 *  \author Stephane Grabli
 *  \date 28/05/2003
 */

#include "WEdge.h"

#include "../scene_graph/IndexedFaceSet.h"
#include "../scene_graph/NodeTransform.h"
#include "../scene_graph/SceneVisitor.h"

#include "../system/FreestyleConfig.h"
#include "../system/RenderMonitor.h"

namespace Freestyle {

class LIB_WINGED_EDGE_EXPORT WingedEdgeBuilder : public SceneVisitor
{
public:
	inline WingedEdgeBuilder() : SceneVisitor()
	{
		_current_wshape = NULL;
		_current_frs_material = NULL;
		_current_matrix = NULL;
		_winged_edge = new WingedEdge; // Not deleted by the destructor
		_pRenderMonitor = NULL;
	}

	virtual ~WingedEdgeBuilder()
	{
		for (vector<Matrix44r*>::iterator it = _matrices_stack.begin(); it != _matrices_stack.end(); ++it)
			delete *it;
		_matrices_stack.clear();
	}

	VISIT_DECL(IndexedFaceSet)
	VISIT_DECL(NodeShape)
	VISIT_DECL(NodeTransform)

	virtual void visitNodeTransformAfter(NodeTransform&);

	//
	// Accessors
	//
	/////////////////////////////////////////////////////////////////////////////

	inline WingedEdge *getWingedEdge()
	{
		return _winged_edge;
	}

	inline WShape *getCurrentWShape()
	{
		return _current_wshape;
	}

	inline FrsMaterial *getCurrentFrsMaterial()
	{
		return _current_frs_material;
	}

	inline Matrix44r *getCurrentMatrix()
	{
		return _current_matrix;
	}

	//
	// Modifiers
	//
	/////////////////////////////////////////////////////////////////////////////

	inline void setCurrentWShape(WShape *wshape)
	{
		_current_wshape = wshape;
	}

	inline void setCurrentFrsMaterial(FrsMaterial *mat)
	{
		_current_frs_material = mat;
	}

#if 0
	inline void setCurrentMatrix(Matrix44r *matrix)
	{
		_current_matrix = matrix;
	}
#endif

	inline void setRenderMonitor(RenderMonitor *iRenderMonitor) {
	_pRenderMonitor = iRenderMonitor;
	}

protected:
	virtual void buildWShape(WShape& shape, IndexedFaceSet& ifs);
	virtual void buildWVertices(WShape& shape, const real *vertices, unsigned vsize);

	RenderMonitor *_pRenderMonitor;

private:
	void buildTriangleStrip(const real *vertices, const real *normals, vector<FrsMaterial>&  iMaterials,
	                        const real *texCoords, const IndexedFaceSet::FaceEdgeMark *iFaceEdgeMarks,
	                        const unsigned *vindices, const unsigned *nindices, const unsigned *mindices,
	                        const unsigned *tindices, const unsigned nvertices);

	void buildTriangleFan(const real *vertices, const real *normals, vector<FrsMaterial>&  iMaterials,
	                      const real *texCoords, const IndexedFaceSet::FaceEdgeMark *iFaceEdgeMarks,
	                      const unsigned *vindices, const unsigned *nindices, const unsigned *mindices,
	                      const unsigned *tindices, const unsigned nvertices);

	void buildTriangles(const real *vertices, const real *normals, vector<FrsMaterial>& iMaterials,
	                    const real *texCoords, const IndexedFaceSet::FaceEdgeMark *iFaceEdgeMarks,
	                    const unsigned *vindices, const unsigned *nindices, const unsigned *mindices,
	                    const unsigned *tindices, const unsigned nvertices);

	void transformVertices(const real *vertices, unsigned vsize, const Matrix44r& transform, real *res);

	void transformNormals(const real *normals, unsigned nsize, const Matrix44r& transform, real *res);

	WShape *_current_wshape;
	FrsMaterial *_current_frs_material;
	WingedEdge *_winged_edge;
	Matrix44r *_current_matrix;
	vector<Matrix44r *> _matrices_stack;
};

} /* namespace Freestyle */

#endif // __FREESTYLE_WINGED_EDGE_BUILDER_H__