X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Fsrc%2Fmodules%2Flyr_std%2Ftwirl.cpp;fp=synfig-core%2Fsrc%2Fmodules%2Flyr_std%2Ftwirl.cpp;h=38d209728dfe81d8b601bbfe6c051b4d0446989d;hb=a095981e18cc37a8ecc7cd237cc22b9c10329264;hp=0000000000000000000000000000000000000000;hpb=9459638ad6797b8139f1e9f0715c96076dbf0890;p=synfig.git

diff --git a/synfig-core/src/modules/lyr_std/twirl.cpp b/synfig-core/src/modules/lyr_std/twirl.cpp
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+/* === S Y N F I G ========================================================= */
+/*!	\file twirl.cpp
+**	\brief Implementation of the "Twirl" layer
+**
+**	$Id$
+**
+**	\legal
+**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**
+**	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>
+#endif
+
+#include <synfig/string.h>
+#include <synfig/time.h>
+#include <synfig/context.h>
+#include <synfig/paramdesc.h>
+#include <synfig/renddesc.h>
+#include <synfig/surface.h>
+#include <synfig/value.h>
+#include <synfig/valuenode.h>
+#include <synfig/transform.h>
+#include "twirl.h"
+
+#endif
+
+/* === U S I N G =========================================================== */
+
+using namespace etl;
+using namespace std;
+using namespace synfig;
+
+/* === G L O B A L S ======================================================= */
+
+SYNFIG_LAYER_INIT(Twirl);
+SYNFIG_LAYER_SET_NAME(Twirl,"twirl");
+SYNFIG_LAYER_SET_LOCAL_NAME(Twirl,N_("Twirl"));
+SYNFIG_LAYER_SET_CATEGORY(Twirl,N_("Distortions"));
+SYNFIG_LAYER_SET_VERSION(Twirl,"0.1");
+SYNFIG_LAYER_SET_CVS_ID(Twirl,"$Id$");
+
+/* === 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 ================================================= */
+
+Twirl::Twirl():
+	Layer_Composite(1.0,Color::BLEND_STRAIGHT),
+	center(0,0),
+	radius(1.0),
+	rotations(Angle::zero()),
+	distort_inside(true),
+	distort_outside(false)
+{
+}
+
+bool
+Twirl::set_param(const String & param, const ValueBase &value)
+{
+	IMPORT(center);
+	IMPORT(radius);
+	IMPORT(rotations);
+	IMPORT(distort_inside);
+	IMPORT(distort_outside);
+
+	return Layer_Composite::set_param(param,value);
+}
+
+ValueBase
+Twirl::get_param(const String &param)const
+{
+	EXPORT(center);
+	EXPORT(radius);
+	EXPORT(rotations);
+	EXPORT(distort_inside);
+	EXPORT(distort_outside);
+
+	EXPORT_NAME();
+	EXPORT_VERSION();
+
+	return false;
+}
+
+Layer::Vocab
+Twirl::get_param_vocab()const
+{
+	Layer::Vocab ret;
+
+	ret.push_back(ParamDesc("center")
+		.set_local_name(_("Center"))
+	);
+
+	ret.push_back(ParamDesc("radius")
+		.set_local_name(_("Radius"))
+		.set_description(_("This is the radius of the circle"))
+		.set_is_distance()
+		.set_origin("center")
+	);
+
+	ret.push_back(ParamDesc("rotations")
+		.set_local_name(_("Rotations"))
+		.set_origin("center")
+	);
+
+	ret.push_back(ParamDesc("distort_inside")
+		.set_local_name(_("Distort Inside"))
+	);
+
+	ret.push_back(ParamDesc("distort_outside")
+		.set_local_name(_("Distort Outside"))
+	);
+
+	return ret;
+}
+
+synfig::Point
+Twirl::distort(const synfig::Point &pos,bool reverse)const
+{
+	Point centered(pos-center);
+	Real mag(centered.mag());
+
+	Angle a;
+
+	if((distort_inside || mag>radius) && (distort_outside || mag<radius))
+		a=rotations*((centered.mag()-radius)/radius);
+	else
+		return pos;
+
+	if(reverse)	a=-a;
+
+	const Real sin(Angle::sin(a).get());
+	const Real cos(Angle::cos(a).get());
+
+	Point twirled;
+	twirled[0]=cos*centered[0]-sin*centered[1];
+	twirled[1]=sin*centered[0]+cos*centered[1];
+
+	return twirled+center;
+}
+
+synfig::Layer::Handle
+Twirl::hit_check(synfig::Context context, const synfig::Point &pos)const
+{
+	return context.hit_check(distort(pos));
+}
+
+Color
+Twirl::get_color(Context context, const Point &pos)const
+{
+	return context.get_color(distort(pos));
+}
+
+class Twirl_Trans : public Transform
+{
+	etl::handle<const Twirl> layer;
+public:
+	Twirl_Trans(const Twirl* x):Transform(x->get_guid()),layer(x) { }
+
+	synfig::Vector perform(const synfig::Vector& x)const
+	{
+		return layer->distort(x,true);
+	}
+
+	synfig::Vector unperform(const synfig::Vector& x)const
+	{
+		return layer->distort(x,false);
+	}
+};
+etl::handle<Transform>
+Twirl::get_transform()const
+{
+	return new Twirl_Trans(this);
+}
+
+/*
+bool
+Twirl::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
+{
+	SuperCallback supercb(cb,0,9500,10000);
+
+	if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
+	{
+		surface->set_wh(renddesc.get_w(),renddesc.get_h());
+	}
+	else
+	{
+		if(!context.accelerated_render(surface,quality,renddesc,&supercb))
+			return false;
+		if(get_amount()==0)
+			return true;
+	}
+
+
+	int x,y;
+
+	Surface::pen pen(surface->begin());
+	const Real pw(renddesc.get_pw()),ph(renddesc.get_ph());
+	Point pos;
+	Point tl(renddesc.get_tl());
+	const int w(surface->get_w());
+	const int h(surface->get_h());
+
+	if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
+	{
+		for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
+			for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
+				pen.put_value(color_func(pos));
+	}
+	else
+	{
+		for(y=0,pos[1]=tl[1];y<h;y++,pen.inc_y(),pen.dec_x(x),pos[1]+=ph)
+			for(x=0,pos[0]=tl[0];x<w;x++,pen.inc_x(),pos[0]+=pw)
+				pen.put_value(Color::blend(color_func(pos),pen.get_value(),get_amount(),get_blend_method()));
+	}
+
+	// Mark our progress as finished
+	if(cb && !cb->amount_complete(10000,10000))
+		return false;
+
+	return true;
+}
+*/