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

/*!	\file rotate.cpp

**	\brief Implementation of the "Rotate" layer

**

**	$Id$

**

**	\legal

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

**	Copyright (c) 2008 Chris Moore

**	Copyright (c) 2012-2013 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

**

** === N O T E S ===========================================================

**

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

/* === 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 <etl misc=""></etl>

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

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

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

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

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

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

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

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

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

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

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

#include "rotate.h"

#include <synfig common="" rendering="" task="" tasktransformation.h=""></synfig>

#include <synfig primitive="" rendering="" transformationaffine.h=""></synfig>

#endif

using namespace std;

using namespace etl;

using namespace synfig;

using namespace modules;

using namespace lyr_std;

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

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

SYNFIG_LAYER_INIT(Rotate);

SYNFIG_LAYER_SET_NAME(Rotate,"rotate");

SYNFIG_LAYER_SET_LOCAL_NAME(Rotate,N_("Rotate"));

SYNFIG_LAYER_SET_CATEGORY(Rotate,N_("Transform"));

SYNFIG_LAYER_SET_VERSION(Rotate,"0.1");

SYNFIG_LAYER_SET_CVS_ID(Rotate,"$Id$");

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

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

/* === E N T R Y P O I N T ================================================= */

Rotate::Rotate():

	param_origin (ValueBase(Vector(0,0))),

	param_amount (ValueBase(Angle::deg(0))),

	sin_val	(0),

	cos_val	(1)

{

	SET_INTERPOLATION_DEFAULTS();

	SET_STATIC_DEFAULTS();

}

Rotate::~Rotate()

{

}

bool

Rotate::set_param(const String & param, const ValueBase &value)

{

	IMPORT_VALUE(param_origin);

	IMPORT_VALUE_PLUS(param_amount,

	{

		Angle amount=value.get(Angle());

		sin_val=Angle::sin(amount).get();

		cos_val=Angle::cos(amount).get();

		param_amount.set(amount);

		return true;

	}

	);

	return false;

}

ValueBase

Rotate::get_param(const String ¶m)const

{

	EXPORT_VALUE(param_origin);

	EXPORT_VALUE(param_amount);

	EXPORT_NAME();

	EXPORT_VERSION();

	return ValueBase();

}

Layer::Vocab

Rotate::get_param_vocab()const

{

	Layer::Vocab ret;

	ret.push_back(ParamDesc("origin")

		.set_local_name(_("Origin"))

		.set_description(_("Point where you want the origin to be"))

	);

	ret.push_back(ParamDesc("amount")

		.set_local_name(_("Amount"))

		.set_description(_("Amount of rotation"))

		.set_origin("origin")

	);

	return ret;

}

class lyr_std::Rotate_Trans : public Transform

{

	etl::handle<const rotate=""> layer;</const>

public:

	Rotate_Trans(const Rotate* x):Transform(x->get_guid()),layer(x) { }

	Vector perform(const Vector& x)const

	{

		Vector origin=layer->param_origin.get(Vector());

		Point pos(x-origin);

		return Point(layer->cos_val*pos[0]-layer->sin_val*pos[1],layer->sin_val*pos[0]+layer->cos_val*pos[1])+origin;

	}

	Vector unperform(const Vector& x)const

	{

		Vector origin=layer->param_origin.get(Vector());

		Point pos(x-origin);

		return Point(layer->cos_val*pos[0]+layer->sin_val*pos[1],-layer->sin_val*pos[0]+layer->cos_val*pos[1])+origin;

	}

	String get_string()const

	{

		return "rotate";

	}

};

etl::handle<transform></transform>

Rotate::get_transform()const

{

	return new Rotate_Trans(this);

}

Layer::Handle

Rotate::hit_check(Context context, const Point &p)const

{

	Vector origin=param_origin.get(Vector());

	Point pos(p-origin);

	Point newpos(cos_val*pos[0]+sin_val*pos[1],-sin_val*pos[0]+cos_val*pos[1]);

	newpos+=origin;

	return context.hit_check(newpos);

}

Color

Rotate::get_color(Context context, const Point &p)const

{

	Vector origin=param_origin.get(Vector());

	Point pos(p-origin);

	Point newpos(cos_val*pos[0]+sin_val*pos[1],-sin_val*pos[0]+cos_val*pos[1]);

	newpos+=origin;

	return context.get_color(newpos);

}

Rect

Rotate::get_full_bounding_rect(Context context)const

{

	Rect under(context.get_full_bounding_rect());

	return get_transform()->perform(under);

}

rendering::Task::Handle

Rotate::build_rendering_task_vfunc(Context context)const

{

	Vector origin=param_origin.get(Vector());

	Angle amount=param_amount.get(Angle());

	rendering::TaskTransformationAffine::Handle task_transformation(new rendering::TaskTransformationAffine());

	task_transformation->transformation->matrix =

			Matrix().set_translate(origin)

		  * Matrix().set_rotate(amount)

		  * Matrix().set_translate(-origin);

	task_transformation->sub_task() = context.build_rendering_task();

	return task_transformation;

}