+++ /dev/null
-/* === S Y N F I G ========================================================= */
-/*! \file metaballs.cpp
-** \brief Implementation of the "Metaballs" 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 <ETL/pen>
-
-#include "metaballs.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(Metaballs);
-SYNFIG_LAYER_SET_NAME(Metaballs,"metaballs");
-SYNFIG_LAYER_SET_LOCAL_NAME(Metaballs,N_("Metaballs"));
-SYNFIG_LAYER_SET_CATEGORY(Metaballs,N_("Example"));
-SYNFIG_LAYER_SET_VERSION(Metaballs,"0.1");
-SYNFIG_LAYER_SET_CVS_ID(Metaballs,"$Id$");
-
-/* === 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 ================================================= */
-
-Metaballs::Metaballs():
- Layer_Composite(1.0,Color::BLEND_STRAIGHT),
- gradient(Color::black(), Color::white()),
- threshold(0),
- threshold2(1),
- positive(false)
-{
- centers.push_back(Point( 0, -1.5)); radii.push_back(2.5); weights.push_back(1);
- centers.push_back(Point(-2, 1)); radii.push_back(2.5); weights.push_back(1);
- centers.push_back(Point( 2, 1)); radii.push_back(2.5); weights.push_back(1);
-}
-
-bool
-Metaballs::set_param(const String & param, const ValueBase &value)
-{
- if( param=="centers" && value.same_type_as(centers))
- {
- centers = value;
- return true;
- }
-
- if( param=="weights" && value.same_type_as(weights))
- {
- weights = value;
- return true;
- }
-
- if( param=="radii" && value.same_type_as(radii))
- {
- radii = value;
- return true;
- }
-
- IMPORT(gradient);
- IMPORT(threshold);
- IMPORT(threshold2);
- IMPORT(positive);
-
- return Layer_Composite::set_param(param,value);
-}
-
-ValueBase
-Metaballs::get_param(const String ¶m)const
-{
- EXPORT(gradient);
-
- EXPORT(radii);
- EXPORT(weights);
- EXPORT(centers);
- EXPORT(threshold);
- EXPORT(threshold2);
- EXPORT(positive);
-
- EXPORT_NAME();
- EXPORT_VERSION();
-
- return Layer_Composite::get_param(param);
-}
-
-Layer::Vocab
-Metaballs::get_param_vocab()const
-{
- Layer::Vocab ret(Layer_Composite::get_param_vocab());
-
- ret.push_back(ParamDesc("gradient")
- .set_local_name(_("Gradient"))
- );
-
- ret.push_back(ParamDesc("centers")
- .set_local_name(_("Points"))
- );
-
- ret.push_back(ParamDesc("radii")
- .set_local_name(_("Radii"))
- );
-
- ret.push_back(ParamDesc("weights")
- .set_local_name(_("Weights"))
- );
-
- ret.push_back(ParamDesc("threshold")
- .set_local_name(_("Gradient Left"))
- );
-
- ret.push_back(ParamDesc("threshold2")
- .set_local_name(_("Gradient Right"))
- );
-
- ret.push_back(ParamDesc("positive")
- .set_local_name(_("Positive Only"))
- );
-
- return ret;
-}
-
-synfig::Layer::Handle
-Metaballs::hit_check(synfig::Context context, const synfig::Point &point)const
-{
- Real density(totaldensity(point));
-
- if (density <= 0 || density > 1 || get_amount() == 0)
- return context.hit_check(point);
-
- synfig::Layer::Handle tmp;
-
- if (get_blend_method()==Color::BLEND_BEHIND && (tmp=context.hit_check(point)))
- return tmp;
-
- if (Color::is_onto(get_blend_method()) && !(context.hit_check(point)))
- return 0;
-
- return const_cast<Metaballs*>(this);
-}
-
-Real
-Metaballs::densityfunc(const synfig::Point &p, const synfig::Point &c, Real R)const
-{
- const Real dx = p[0] - c[0];
- const Real dy = p[1] - c[1];
-
- const Real n = (1 - (dx*dx + dy*dy)/(R*R));
- if (positive && n < 0) return 0;
- return (n*n*n);
-
- /*
- f(d) = (1 - d^2)^3
- f'(d) = -6d * (1 - d^2)^2
-
- could use this too...
- f(d) = (1 - d^2)^2
- f'(d) = -6d * (1 - d^2)
- */
-}
-
-Real
-Metaballs::totaldensity(const Point &pos)const
-{
- Real density = 0;
-
- //sum up weighted functions
- for(unsigned int i=0;i<centers.size();i++)
- density += weights[i] * densityfunc(pos,centers[i], radii[i]);
-
- return (density - threshold) / (threshold2 - threshold);
-}
-
-Color
-Metaballs::get_color(Context context, const Point &pos)const
-{
- if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
- return gradient(totaldensity(pos));
- else
- return Color::blend(gradient(totaldensity(pos)),context.get_color(pos),get_amount(),get_blend_method());
-}
-
-bool
-Metaballs::accelerated_render(Context context,Surface *surface,int quality, const RendDesc &renddesc, ProgressCallback *cb)const
-{
- // Width and Height of a pixel
- const Point br(renddesc.get_br()), tl(renddesc.get_tl());
- const int w(renddesc.get_w()), h(renddesc.get_h());
- const Real pw(renddesc.get_pw()), ph(renddesc.get_ph());
-
- SuperCallback supercb(cb,0,9000,10000);
-
- Point pos(tl[0],tl[1]);
-
- if(!context.accelerated_render(surface,quality,renddesc,&supercb))
- {
- if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
- return false;
- }
-
- for(int y = 0; y < h; y++, pos[1] += ph)
- {
- pos[0] = tl[0];
- for(int x = 0; x < w; x++, pos[0] += pw)
- (*surface)[y][x] = Color::blend(gradient(totaldensity(pos)),(*surface)[y][x],get_amount(),get_blend_method());
- }
-
- // Mark our progress as finished
- if(cb && !cb->amount_complete(10000,10000))
- return false;
-
- return true;
-}
projects / synfig.git / blobdiff