/*
 * ***** 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 __BLENDER_FILE_LOADER_H__
#define __BLENDER_FILE_LOADER_H__

/** \file blender/freestyle/intern/blender_interface/BlenderFileLoader.h
 *  \ingroup freestyle
 */

#include <string.h>
#include <float.h>

#include "../geometry/BBox.h"
#include "../geometry/Geom.h"
#include "../geometry/GeomCleaner.h"
#include "../geometry/GeomUtils.h"
#include "../scene_graph/IndexedFaceSet.h"
#include "../scene_graph/NodeGroup.h"
#include "../scene_graph/NodeTransform.h"
#include "../scene_graph/NodeShape.h"
#include "../system/FreestyleConfig.h"
#include "../system/RenderMonitor.h"

extern "C" {
#include "DNA_material_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_scene_types.h"

#include "renderdatabase.h"
#include "render_types.h"

#include "BKE_mesh.h"
#include "BKE_scene.h"

#include "BLI_math.h"
}

#ifdef WITH_CXX_GUARDEDALLOC
#include "MEM_guardedalloc.h"
#endif

namespace Freestyle {

class NodeGroup;

struct LoaderState {
	float *pv;
	float *pn;
	IndexedFaceSet::FaceEdgeMark *pm;
	unsigned *pvi;
	unsigned *pni;
	unsigned *pmi;
	unsigned currentIndex;
	unsigned currentMIndex;
	float minBBox[3];
	float maxBBox[3];
};

class LIB_SCENE_GRAPH_EXPORT BlenderFileLoader
{
public:
	/*! Builds a MaxFileLoader */
	BlenderFileLoader(Render *re, SceneRenderLayer *srl);
	virtual ~BlenderFileLoader();

	/*! Loads the 3D scene and returns a pointer to the scene root node */
	NodeGroup * Load();

	/*! Gets the number of read faces */
	inline unsigned int numFacesRead() {return _numFacesRead;}

	/*! Gets the smallest edge size read */
	inline real minEdgeSize() {return _minEdgeSize;}

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

protected:
	void insertShapeNode(ObjectInstanceRen *obi, int id);
	int testDegenerateTriangle(float v1[3], float v2[3], float v3[3]);
	bool testEdgeRotation(float v1[3], float v2[3], float v3[3], float v4[3]);
	int countClippedFaces(float v1[3], float v2[3], float v3[3], int clip[3]);
	void clipLine(float v1[3], float v2[3], float c[3], float z);
	void clipTriangle(int numTris, float triCoords[][3], float v1[3], float v2[3], float v3[3],
	                  float triNormals[][3], float n1[3], float n2[3], float n3[3],
	                  bool edgeMarks[5], bool em1, bool em2, bool em3, int clip[3]);
	void addTriangle(struct LoaderState *ls, float v1[3], float v2[3], float v3[3],
	                 float n1[3], float n2[3], float n3[3], bool fm, bool em1, bool em2, bool em3);

protected:
	struct detri_t {
		unsigned viA, viB, viP; // 0 <= viA, viB, viP < viSize
		Vec3r v;
		unsigned n;
	};
	Render *_re;
	SceneRenderLayer *_srl;
	NodeGroup *_Scene;
	unsigned _numFacesRead;
	real _minEdgeSize;
	bool _smooth; /* if true, face smoothness is taken into account */
	float _viewplane_left;
	float _viewplane_right;
	float _viewplane_bottom;
	float _viewplane_top;
	float _z_near, _z_far;
	float _z_offset;

	RenderMonitor *_pRenderMonitor;

#ifdef WITH_CXX_GUARDEDALLOC
public:
	MEM_CXX_CLASS_ALLOC_FUNCS("Freestyle:BlenderFileLoader")
#endif
};

} /* namespace Freestyle */

#endif // __BLENDER_FILE_LOADER_H__
