/*
 * ***** 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.
 *
 * The Original Code is Copyright (C) 2010 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#ifndef __FREESTYLE_FUNCTIONS_1D_H__
#define __FREESTYLE_FUNCTIONS_1D_H__

/** \file blender/freestyle/intern/view_map/Functions1D.h
 *  \ingroup freestyle
 *  \brief Functions taking 1D input
 *  \author Stephane Grabli
 *  \author Emmanuel Turquin
 *  \date 01/07/2003
 */

#include "Functions0D.h"
#include "Interface1D.h"
#include "ViewMap.h"

#include "../system/FreestyleConfig.h"
#include "../system/Precision.h"
#include "../system/TimeStamp.h"

#include "../python/Director.h"

//
// UnaryFunction1D (base class for functions in 1D)
//
///////////////////////////////////////////////////////////

/*! Base class for Unary Functions (functors) working on Interface1D.
 *  A unary function will be used by calling its operator() on an Interface1D.
 *  \attention In the scripting language, there exists several prototypes depending on the returned value type.
 *  For example, you would inherit from a UnaryFunction1DDouble if you wish to define a function that returns a double.
 *  The different existing prototypes are:
 *    - UnaryFunction1DVoid
 *    - UnaryFunction1DUnsigned
 *    - UnaryFunction1DReal
 *    - UnaryFunction1DFloat
 *    - UnaryFunction1DDouble
 *    - UnaryFunction1DVec2f
 *    - UnaryFunction1DVec3f
 */
template <class T>
class /*LIB_VIEW_MAP_EXPORT*/ UnaryFunction1D
{
public:
	T result;
	PyObject *py_uf1D;

	/*! The type of the value returned by the functor. */
	typedef T ReturnedValueType;

	/*! Default constructor */
	UnaryFunction1D()
	{
		_integration = MEAN;
	}

	/*! Builds a UnaryFunction1D from an integration type.
	 *  \param iType
	 *    In case the result for the Interface1D would be obtained by evaluating a 0D function over the different
	 *    Interface0D of the Interface1D, \a iType tells which integration method to use.
	 *    The default integration method is the MEAN.
	 */
	UnaryFunction1D(IntegrationType iType)
	{
		_integration = iType;
	}

	/*! destructor. */
	virtual ~UnaryFunction1D() {}

	/*! returns the string "UnaryFunction1D". */
	virtual string getName() const
	{
		return "UnaryFunction1D";
	}

	/*! The operator ().
	 *  \param inter 
	 *    The Interface1D on which we wish to evaluate the function.
	 *  \return the result of the function of type T.
	 */
	virtual int operator()(Interface1D& inter)
	{
		return Director_BPy_UnaryFunction1D___call__(this, py_uf1D, inter);
	}

	/*! Sets the integration method */
	void setIntegrationType(IntegrationType integration)
	{
		_integration = integration;
	}

	/*! Returns the integration method. */
	IntegrationType getIntegrationType() const
	{
		return _integration;
	}

protected:
	IntegrationType _integration;
};


class  UnaryFunction1D_void
{
public:
	PyObject *py_uf1D;

	UnaryFunction1D_void()
	{
		_integration = MEAN;
	}

	UnaryFunction1D_void(IntegrationType iType)
	{
		_integration = iType;
	}

	virtual ~UnaryFunction1D_void() {}

	virtual string getName() const
	{
		return "UnaryFunction1D_void";
	}

	int operator()(Interface1D& inter)
	{
		return Director_BPy_UnaryFunction1D___call__(this, py_uf1D, inter);
	}

	void setIntegrationType(IntegrationType integration)
	{
		_integration = integration;
	}

	IntegrationType getIntegrationType() const
	{
		return _integration;
	}

protected:
	IntegrationType _integration;
};


//
// Functions definitions
//
///////////////////////////////////////////////////////////

namespace Functions1D {

// GetXF1D
/*! Returns the X 3D coordinate of an Interface1D. */
class LIB_VIEW_MAP_EXPORT GetXF1D : public UnaryFunction1D<real>
{
private:
	Functions0D::GetXF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	GetXF1D(IntegrationType iType) : UnaryFunction1D<real>(iType) {}

	/*! Returns the string "GetXF1D" */
	string getName() const
	{
		return "GetXF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// GetYF1D
/*! Returns the Y 3D coordinate of an Interface1D. */
class LIB_VIEW_MAP_EXPORT GetYF1D : public UnaryFunction1D<real>
{
private:
Functions0D::GetYF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	GetYF1D(IntegrationType iType = MEAN) : UnaryFunction1D<real>(iType) {}

	/*! Returns the string "GetYF1D" */
	string getName() const
	{
		return "GetYF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// GetZF1D
/*! Returns the Z 3D coordinate of an Interface1D. */
class LIB_VIEW_MAP_EXPORT GetZF1D : public UnaryFunction1D<real>
{
private:
	Functions0D::GetZF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	GetZF1D(IntegrationType iType = MEAN) : UnaryFunction1D<real>(iType) {}

	/*! Returns the string "GetZF1D" */
	string getName() const
	{
		return "GetZF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// GetProjectedXF1D
/*! Returns the projected X 3D coordinate of an Interface1D. */
class LIB_VIEW_MAP_EXPORT GetProjectedXF1D : public UnaryFunction1D<real>
{
private:
	Functions0D::GetProjectedXF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	GetProjectedXF1D(IntegrationType iType = MEAN) : UnaryFunction1D<real>(iType) {}

	/*! Returns the string "GetProjectedXF1D" */
	string getName() const
	{
		return "GetProjectedXF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// GetProjectedYF1D
/*! Returns the projected Y 3D coordinate of an Interface1D. */
class LIB_VIEW_MAP_EXPORT GetProjectedYF1D : public UnaryFunction1D<real>
{
private:
	Functions0D::GetProjectedYF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	GetProjectedYF1D(IntegrationType iType = MEAN) : UnaryFunction1D<real>(iType) {}

	/*! Returns the string "GetProjectedYF1D" */
	string getName() const
	{
		return "GetProjectedYF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// GetProjectedZF1D
/*! Returns the projected Z 3D coordinate of an Interface1D. */
class LIB_VIEW_MAP_EXPORT GetProjectedZF1D : public UnaryFunction1D<real>
{
private:
	Functions0D::GetProjectedZF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	GetProjectedZF1D(IntegrationType iType = MEAN) : UnaryFunction1D<real>(iType) {}

	/*! Returns the string "GetProjectedZF1D" */
	string getName() const
	{
		return "GetProjectedZF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// Orientation2DF1D
/*! Returns the 2D orientation as a Vec2f*/
class LIB_VIEW_MAP_EXPORT Orientation2DF1D : public UnaryFunction1D<Vec2f>
{
private:
	Functions0D::VertexOrientation2DF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	Orientation2DF1D(IntegrationType iType = MEAN) : UnaryFunction1D<Vec2f>(iType) {}

	/*! Returns the string "Orientation2DF1D" */
	string getName() const
	{
		return "Orientation2DF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// Orientation3DF1D
/*! Returns the 3D orientation as a Vec3f. */
class LIB_VIEW_MAP_EXPORT Orientation3DF1D : public UnaryFunction1D<Vec3f>
{
private:
	Functions0D::VertexOrientation3DF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	Orientation3DF1D(IntegrationType iType = MEAN) : UnaryFunction1D<Vec3f>(iType) {}

	/*! Returns the string "Orientation3DF1D" */
	string getName() const
	{
		return "Orientation3DF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// ZDiscontinuityF1D
/*! Returns a real giving the distance between and Interface1D and the shape that lies behind (occludee).
 *  This distance is evaluated in the camera space and normalized between 0 and 1. Therefore, if no oject is occluded
 *  by the shape to which the Interface1D belongs to, 1 is returned.
 */
class LIB_VIEW_MAP_EXPORT ZDiscontinuityF1D : public UnaryFunction1D<real>
{
private:
	Functions0D::ZDiscontinuityF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	ZDiscontinuityF1D(IntegrationType iType = MEAN) : UnaryFunction1D<real>(iType) {}

	/*! Returns the string "ZDiscontinuityF1D" */
	string getName() const
	{
		return "ZDiscontinuityF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// QuantitativeInvisibilityF1D
/*! Returns the Quantitative Invisibility of an Interface1D element.
 *  If the Interface1D is a ViewEdge, then there is no ambiguity concerning the result. But, if the Interface1D
 *  results of a chaining (chain, stroke), then it might be made of several 1D elements of different
 *  Quantitative Invisibilities.
 */
class LIB_VIEW_MAP_EXPORT QuantitativeInvisibilityF1D : public UnaryFunction1D<unsigned>
{
private:
	Functions0D::QuantitativeInvisibilityF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	QuantitativeInvisibilityF1D(IntegrationType iType = MEAN) : UnaryFunction1D<unsigned int>(iType) {}

	/*! Returns the string "QuantitativeInvisibilityF1D" */
	string getName() const
	{
		return "QuantitativeInvisibilityF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// CurveNatureF1D
/*! Returns the nature of the Interface1D (silhouette, ridge, crease...).
 *  Except if the Interface1D is a ViewEdge, this result might be ambiguous.
 *  Indeed, the Interface1D might result from the gathering of several 1D elements, each one being of a different
 *  nature. An integration method, such as the MEAN, might give, in this case, irrelevant results.
 */
class LIB_VIEW_MAP_EXPORT CurveNatureF1D : public UnaryFunction1D<Nature::EdgeNature>
{
private:
	Functions0D::CurveNatureF0D _func;

public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	CurveNatureF1D(IntegrationType iType = MEAN) : UnaryFunction1D<Nature::EdgeNature>(iType) {}

	/*! Returns the string "CurveNatureF1D" */
	string getName() const
	{
		return "CurveNatureF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// TimeStampF1D
/*! Returns the time stamp of the Interface1D. */
class LIB_VIEW_MAP_EXPORT TimeStampF1D : public UnaryFunction1D_void
{
public:
	/*! Returns the string "TimeStampF1D" */
	string getName() const
	{
		return "TimeStampF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// IncrementChainingTimeStampF1D
/*! Increments the chaining time stamp of the Interface1D. */
class LIB_VIEW_MAP_EXPORT IncrementChainingTimeStampF1D : public UnaryFunction1D_void
{
public:
	/*! Returns the string "IncrementChainingTimeStampF1D" */
	string getName() const
	{
		return "IncrementChainingTimeStampF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// ChainingTimeStampF1D
/*! Sets the chaining time stamp of the Interface1D. */
class LIB_VIEW_MAP_EXPORT ChainingTimeStampF1D : public UnaryFunction1D_void
{
public:
	/*! Returns the string "ChainingTimeStampF1D" */
	string getName() const
	{
		return "ChainingTimeStampF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};


// Curvature2DAngleF1D
/*! Returns the 2D curvature as an angle for an Interface1D. */
class LIB_VIEW_MAP_EXPORT Curvature2DAngleF1D : public UnaryFunction1D<real>
{
public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	Curvature2DAngleF1D(IntegrationType iType = MEAN) : UnaryFunction1D<real>(iType) {}

	/*! Returns the string "Curvature2DAngleF1D" */
	string getName() const
	{
		return "Curvature2DAngleF1D";
	}

	/*! the () operator.*/
	int operator()(Interface1D& inter)
	{
		result = integrate(_fun, inter.verticesBegin(), inter.verticesEnd(), _integration);
		return 0;
	}

private:
	Functions0D::Curvature2DAngleF0D _fun;
};

// Normal2DF1D
/*! Returns the 2D normal for an interface 1D. */
class LIB_VIEW_MAP_EXPORT Normal2DF1D : public UnaryFunction1D<Vec2f>
{
public:
	/*! Builds the functor.
	 *  \param iType
	 *    The integration method used to compute a single value from a set of values.
	 */
	Normal2DF1D(IntegrationType iType = MEAN) : UnaryFunction1D<Vec2f>(iType) {}

	/*! Returns the string "Normal2DF1D" */
	string getName() const
	{
		return "Normal2DF1D";
	}

	/*! the () operator.*/
	int operator()(Interface1D& inter)
	{
		result = integrate(_fun, inter.verticesBegin(), inter.verticesEnd(), _integration);
		return 0;
	}

private:
	Functions0D::Normal2DF0D _fun;
};

// GetShapeF1D
/*! Returns list of shapes covered by this Interface1D. */
class LIB_VIEW_MAP_EXPORT GetShapeF1D : public UnaryFunction1D<std::vector<ViewShape*> >
{
public:
	/*! Builds the functor. */
	GetShapeF1D() : UnaryFunction1D<std::vector<ViewShape*> >() {}

	/*! Returns the string "GetShapeF1D" */
	string getName() const
	{
		return "GetShapeF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// GetOccludersF1D
/*! Returns list of occluding shapes covered by this Interface1D. */
class LIB_VIEW_MAP_EXPORT GetOccludersF1D : public UnaryFunction1D<std::vector<ViewShape*> >
{
public:
	/*! Builds the functor. */
	GetOccludersF1D() : UnaryFunction1D<std::vector<ViewShape*> >() {}

	/*! Returns the string "GetOccludersF1D" */
	string getName() const
	{
		return "GetOccludersF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// GetOccludeeF1D
/*! Returns list of occluded shapes covered by this Interface1D. */
class LIB_VIEW_MAP_EXPORT GetOccludeeF1D : public UnaryFunction1D<std::vector<ViewShape*> >
{
public:
	/*! Builds the functor. */
	GetOccludeeF1D() : UnaryFunction1D<std::vector<ViewShape*> >() {}

	/*! Returns the string "GetOccludeeF1D" */
	string getName() const
	{
		return "GetOccludeeF1D";
	}

	/*! the () operator. */
	int operator()(Interface1D& inter);
};

// internal
////////////

// getOccludeeF1D
LIB_VIEW_MAP_EXPORT
void getOccludeeF1D(Interface1D& inter, set<ViewShape*>& oShapes);

// getOccludersF1D
LIB_VIEW_MAP_EXPORT
void getOccludersF1D(Interface1D& inter, set<ViewShape*>& oShapes);

// getShapeF1D
LIB_VIEW_MAP_EXPORT
void getShapeF1D(Interface1D& inter, set<ViewShape*>& oShapes);

} // end of namespace Functions1D

#endif // __FREESTYLE_FUNCTIONS_1D_H__