X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Fsrc%2Fmodules%2Flyr_std%2Fjulia.cpp;fp=synfig-core%2Fsrc%2Fmodules%2Flyr_std%2Fjulia.cpp;h=ad2478e8fd8caa6a974a73102c9f8bb47334a115;hb=a095981e18cc37a8ecc7cd237cc22b9c10329264;hp=0000000000000000000000000000000000000000;hpb=9459638ad6797b8139f1e9f0715c96076dbf0890;p=synfig.git

diff --git a/synfig-core/src/modules/lyr_std/julia.cpp b/synfig-core/src/modules/lyr_std/julia.cpp
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+/* === S Y N F I G ========================================================= */
+/*!	\file julia.cpp
+**	\brief Implementation of the "Julia Set" layer
+**
+**	$Id$
+**
+**	\legal
+**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
+**	Copyright (c) 2007 Chris Moore
+**
+**	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>
+#endif
+
+#include "julia.h"
+
+#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>
+
+#endif
+
+/* === M A C R O S ========================================================= */
+
+#define LOG_OF_2		0.69314718055994528623
+
+/* === G L O B A L S ======================================================= */
+
+SYNFIG_LAYER_INIT(Julia);
+SYNFIG_LAYER_SET_NAME(Julia,"julia");
+SYNFIG_LAYER_SET_LOCAL_NAME(Julia,N_("Julia Set"));
+SYNFIG_LAYER_SET_CATEGORY(Julia,N_("Fractals"));
+SYNFIG_LAYER_SET_VERSION(Julia,"0.1");
+SYNFIG_LAYER_SET_CVS_ID(Julia,"$Id$");
+
+/* === P R O C E D U R E S ================================================= */
+
+inline void
+color_neg_flip(Color &color)
+{
+	if(color.get_a()==0)
+	{
+		color=Color::alpha();
+		return;
+	}
+
+	if(color.get_a()<0)
+		color=-color;
+
+	if(color.get_r()<0)
+	{
+		color.set_g(color.get_g()-color.get_r());
+		color.set_b(color.get_b()-color.get_r());
+		color.set_r(0);
+	}
+	if(color.get_g()<0)
+	{
+		color.set_r(color.get_r()-color.get_g());
+		color.set_b(color.get_b()-color.get_g());
+		color.set_g(0);
+	}
+	if(color.get_b()<0)
+	{
+		color.set_r(color.get_r()-color.get_b());
+		color.set_g(color.get_g()-color.get_b());
+		color.set_b(0);
+	}
+}
+
+/* === M E T H O D S ======================================================= */
+
+Julia::Julia():color_shift(angle::degrees(0))
+{
+	icolor=Color::black();
+	ocolor=Color::black();
+	iterations=32;
+	color_shift=Angle::deg(0);
+
+	distort_inside=true;
+	distort_outside=true;
+	shade_inside=true;
+	shade_outside=true;
+	solid_inside=false;
+	solid_outside=false;
+	invert_inside=false;
+	invert_outside=false;
+	color_inside=true;
+	color_outside=false;
+	color_cycle=false;
+	smooth_outside=true;
+	broken=false;
+	seed=Point(0,0);
+
+	bailout=4;
+	lp=log(log(bailout));
+}
+
+bool
+Julia::set_param(const String & param, const ValueBase &value)
+{
+
+	IMPORT(icolor);
+	IMPORT(ocolor);
+	IMPORT(color_shift);
+	IMPORT(seed);
+
+	IMPORT(distort_inside);
+	IMPORT(distort_outside);
+	IMPORT(shade_inside);
+	IMPORT(shade_outside);
+	IMPORT(solid_inside);
+	IMPORT(solid_outside);
+	IMPORT(invert_inside);
+	IMPORT(invert_outside);
+	IMPORT(color_inside);
+	IMPORT(color_outside);
+
+	IMPORT(color_cycle);
+	IMPORT(smooth_outside);
+	IMPORT(broken);
+
+	if(param=="iterations" && value.same_type_as(iterations))
+	{
+		iterations=value.get(iterations);
+		if(iterations<0)
+			iterations=0;
+		if(iterations>500000)
+			iterations=500000;
+		return true;
+	}
+	if(param=="bailout" && value.same_type_as(bailout))
+	{
+		bailout=value.get(bailout);
+		bailout*=bailout;
+		lp=log(log(bailout));
+		return true;
+	}
+
+	return false;
+}
+
+ValueBase
+Julia::get_param(const String & param)const
+{
+	EXPORT(icolor);
+	EXPORT(ocolor);
+	EXPORT(color_shift);
+	EXPORT(iterations);
+	EXPORT(seed);
+
+	EXPORT(distort_inside);
+	EXPORT(distort_outside);
+	EXPORT(shade_inside);
+	EXPORT(shade_outside);
+	EXPORT(solid_inside);
+	EXPORT(solid_outside);
+	EXPORT(invert_inside);
+	EXPORT(invert_outside);
+	EXPORT(color_inside);
+	EXPORT(color_outside);
+	EXPORT(color_cycle);
+	EXPORT(smooth_outside);
+	EXPORT(broken);
+
+	if(param=="bailout")
+		return sqrt(bailout);
+
+	EXPORT_NAME();
+	EXPORT_VERSION();
+
+	return ValueBase();
+}
+
+Color
+Julia::get_color(Context context, const Point &pos)const
+{
+	Real
+		cr, ci,
+		zr, zi,
+		zr_hold;
+
+	ColorReal
+		depth, mag(0);
+
+	Color
+		ret;
+
+	cr=seed[0];
+	ci=seed[1];
+	zr=pos[0];
+	zi=pos[1];
+
+	for(int i=0;i<iterations;i++)
+	{
+		// Perform complex multiplication
+		zr_hold=zr;
+		zr=zr*zr-zi*zi + cr;
+		zi=zr_hold*zi*2 + ci;
+
+		// Use "broken" algorithm, if requested (looks weird)
+		if(broken)zr+=zi;
+
+		// Calculate Magnitude
+		mag=zr*zr+zi*zi;
+
+		if(mag>4)
+		{
+			if(smooth_outside)
+			{
+				// Darco's original mandelbrot smoothing algo
+				// depth=((Point::value_type)i+(2.0-sqrt(mag))/PI);
+
+				// Linas Vepstas algo (Better than darco's)
+				// See (http://linas.org/art-gallery/escape/smooth.html)
+				depth= (ColorReal)i - log(log(sqrt(mag))) / LOG_OF_2;
+
+				// Clamp
+				if(depth<0) depth=0;
+			}
+			else
+				depth=static_cast<ColorReal>(i);
+
+			if(solid_outside)
+				ret=ocolor;
+			else
+				if(distort_outside)
+					ret=context.get_color(Point(zr,zi));
+				else
+					ret=context.get_color(pos);
+
+			if(invert_outside)
+				ret=~ret;
+
+			if(color_outside)
+				ret=ret.set_uv(zr,zi).clamped_negative();
+
+			if(color_cycle)
+				ret=ret.rotate_uv(color_shift.operator*(depth)).clamped_negative();
+
+			if(shade_outside)
+			{
+				ColorReal alpha=depth/static_cast<ColorReal>(iterations);
+				ret=(ocolor-ret)*alpha+ret;
+			}
+			return ret;
+		}
+	}
+
+	if(solid_inside)
+		ret=icolor;
+	else
+		if(distort_inside)
+			ret=context.get_color(Point(zr,zi));
+		else
+			ret=context.get_color(pos);
+
+	if(invert_inside)
+		ret=~ret;
+
+	if(color_inside)
+		ret=ret.set_uv(zr,zi).clamped_negative();
+
+	if(shade_inside)
+		ret=(icolor-ret)*mag+ret;
+
+	return ret;
+}
+
+Layer::Vocab
+Julia::get_param_vocab()const
+{
+	Layer::Vocab ret;
+
+	ret.push_back(ParamDesc("icolor")
+		.set_local_name(_("Inside Color"))
+		.set_description(_("Color of the Set"))
+	);
+	ret.push_back(ParamDesc("ocolor")
+		.set_local_name(_("Outside Color"))
+		.set_description(_("Color outside the Set"))
+	);
+	ret.push_back(ParamDesc("color_shift")
+		.set_local_name(_("Color Shift"))
+	);
+	ret.push_back(ParamDesc("iterations")
+		.set_local_name(_("Iterations"))
+	);
+	ret.push_back(ParamDesc("seed")
+		.set_local_name(_("Seed Point"))
+	);
+	ret.push_back(ParamDesc("bailout")
+		.set_local_name(_("Bailout ValueBase"))
+	);
+
+	ret.push_back(ParamDesc("distort_inside")
+		.set_local_name(_("Distort Inside"))
+	);
+	ret.push_back(ParamDesc("shade_inside")
+		.set_local_name(_("Shade Inside"))
+	);
+	ret.push_back(ParamDesc("solid_inside")
+		.set_local_name(_("Solid Inside"))
+	);
+	ret.push_back(ParamDesc("invert_inside")
+		.set_local_name(_("Invert Inside"))
+	);
+	ret.push_back(ParamDesc("color_inside")
+		.set_local_name(_("Color Inside"))
+	);
+	ret.push_back(ParamDesc("distort_outside")
+		.set_local_name(_("Distort Outside"))
+	);
+	ret.push_back(ParamDesc("shade_outside")
+		.set_local_name(_("Shade Outside"))
+	);
+	ret.push_back(ParamDesc("solid_outside")
+		.set_local_name(_("Solid Outside"))
+	);
+	ret.push_back(ParamDesc("invert_outside")
+		.set_local_name(_("Invert Outside"))
+	);
+	ret.push_back(ParamDesc("color_outside")
+		.set_local_name(_("Color Outside"))
+	);
+
+	ret.push_back(ParamDesc("color_cycle")
+		.set_local_name(_("Color Cycle"))
+	);
+	ret.push_back(ParamDesc("smooth_outside")
+		.set_local_name(_("Smooth Outside"))
+		.set_description(_("Smooth the coloration outside the set"))
+	);
+	ret.push_back(ParamDesc("broken")
+		.set_local_name(_("Break Set"))
+		.set_description(_("Modify equation to achieve interesting results"))
+	);
+
+
+	return ret;
+}