/* === S Y N F I G ========================================================= */

/*!	\file valuenode_blinecalcwidth.cpp

**	\brief Implementation of the "BLine Width" valuenode conversion.

**

**	$Id$

**

**	\legal

**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley

**	Copyright (c) 2008 Chris Moore

**  Copyright (c) 2011 Carlos Lรณpez

**

**	This package 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 package 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.

**	\endlegal

*/

/* ========================================================================= */

/* === H E A D E R S ======================================================= */

#ifdef USING_PCH

#	include "pch.h"

#else

#ifdef HAVE_CONFIG_H

#	include <config.h></config.h>

#endif

#include "valuenode_blinecalcwidth.h"

#include "valuenode_bline.h"

#include "valuenode_const.h"

#include "valuenode_composite.h"

#include <synfig general.h=""></synfig>

#include <synfig localization.h=""></synfig>

#include <synfig valuenode_registry.h=""></synfig>

#include <synfig exception.h=""></synfig>

#include <etl hermite=""></etl>

#endif

/* === U S I N G =========================================================== */

using namespace std;

using namespace etl;

using namespace synfig;

/* === M A C R O S ========================================================= */

/* === G L O B A L S ======================================================= */

REGISTER_VALUENODE(ValueNode_BLineCalcWidth, RELEASE_VERSION_0_61_08, "blinecalcwidth", "Spline Width")

/* === P R O C E D U R E S ================================================= */

/* === M E T H O D S ======================================================= */

ValueNode_BLineCalcWidth::ValueNode_BLineCalcWidth(Type &x):

	LinkableValueNode(x)

{

	Vocab ret(get_children_vocab());

	set_children_vocab(ret);

	if(x!=type_real)

		throw Exception::BadType(x.description.local_name);

	ValueNode_BLine* value_node(new ValueNode_BLine());

	set_link("bline",value_node);

	set_link("loop",ValueNode_Const::create(bool(false)));

	set_link("amount",ValueNode_Const::create(Real(0.5)));

	set_link("scale",ValueNode_Const::create(Real(1.0)));

	set_link("homogeneous",ValueNode_Const::create(bool(true)));

}

LinkableValueNode*

ValueNode_BLineCalcWidth::create_new()const

{

	return new ValueNode_BLineCalcWidth(type_real);

}

ValueNode_BLineCalcWidth*

ValueNode_BLineCalcWidth::create(const ValueBase &x)

{

	return new ValueNode_BLineCalcWidth(x.get_type());

}

ValueNode_BLineCalcWidth::~ValueNode_BLineCalcWidth()

{

	unlink_all();

}

ValueBase

ValueNode_BLineCalcWidth::operator()(Time t, Real amount)const

{

	if (getenv("SYNFIG_DEBUG_VALUENODE_OPERATORS"))

		printf("%s:%d operator()\n", __FILE__, __LINE__);

	const ValueBase::List bline = (*bline_)(t).get_list();

	handle<valuenode_bline> bline_value_node( handle<valuenode_bline>::cast_dynamic(bline_) );</valuenode_bline></valuenode_bline>

	assert(bline_value_node);

	const bool looped = bline_value_node->get_loop();

	int size = (int)bline.size();

	int count = looped ? size : size - 1;

	if (count < 1) return Vector();

	bool loop         = (*loop_)(t).get(bool());

	bool homogeneous  = (*homogeneous_)(t).get(bool());

	Real scale        = (*scale_)(t).get(Real());

	if (loop) amount -= floor(amount);

	if (homogeneous) amount = hom_to_std(bline, amount, loop, looped);

	if (amount < 0) amount = 0;

	if (amount > 1) amount = 1;

	amount *= count;

	int i0 = std::max(0, std::min(size-1, (int)floor(amount)));

	int i1 = (i0 + 1) % size;

	Real part = amount - i0;

	Real width0 = bline[i0].get(BLinePoint()).get_width();

	Real width1 = bline[i1].get(BLinePoint()).get_width();

	return (width0 + part*(width1 - width0))*scale;

}

ValueBase

ValueNode_BLineCalcWidth::operator()(Time t)const

{

	Real amount((*amount_)(t).get(Real()));

	return (*this)(t, amount);

}

bool

ValueNode_BLineCalcWidth::set_link_vfunc(int i,ValueNode::Handle value)

{

	assert(i>=0 && i

	switch(i)

	{

	case 0: CHECK_TYPE_AND_SET_VALUE(bline_,  type_list);

	case 1: CHECK_TYPE_AND_SET_VALUE(loop_,   type_bool);

	case 2: CHECK_TYPE_AND_SET_VALUE(amount_, type_real);

	case 3: CHECK_TYPE_AND_SET_VALUE(scale_,  type_real);

	case 4: CHECK_TYPE_AND_SET_VALUE(homogeneous_,  type_bool);

	}

	return false;

}

ValueNode::LooseHandle

ValueNode_BLineCalcWidth::get_link_vfunc(int i)const

{

	assert(i>=0 && i

	switch(i)

	{

		case 0: return bline_;

		case 1: return loop_;

		case 2: return amount_;

		case 3: return scale_;

		case 4: return homogeneous_;

	}

	return 0;

}

bool

ValueNode_BLineCalcWidth::check_type(Type &type)

{

	return type==type_real;

}

LinkableValueNode::Vocab

ValueNode_BLineCalcWidth::get_children_vocab_vfunc()const

{

	if(children_vocab.size())

		return children_vocab;

	LinkableValueNode::Vocab ret;

	ret.push_back(ParamDesc(ValueBase(),"bline")

		.set_local_name(_("Spline"))

		.set_description(_("The spline where the width is linked to"))

	);

	ret.push_back(ParamDesc(ValueBase(),"loop")

		.set_local_name(_("Loop"))

		.set_description(_("When checked, the amount would loop"))

	);

	ret.push_back(ParamDesc(ValueBase(),"amount")

		.set_local_name(_("Amount"))

		.set_description(_("The position of the linked width on the spline (0,1]"))

	);

	ret.push_back(ParamDesc(ValueBase(),"scale")

		.set_local_name(_("Scale"))

		.set_description(_("Scale of the width"))

	);

	ret.push_back(ParamDesc(ValueBase(),"homogeneous")

		.set_local_name(_("Homogeneous"))

		.set_description(_("When checked, the width is spline length based"))

	);

	return ret;

}