/* === S Y N F I G ========================================================= */
/*! \file metaballs.cpp
-** \brief Implements metaballs
+** \brief Implementation of the "Metaballs" layer
**
** $Id$
**
SYNFIG_LAYER_INIT(Metaballs);
SYNFIG_LAYER_SET_NAME(Metaballs,"metaballs");
-SYNFIG_LAYER_SET_LOCAL_NAME(Metaballs,_("Metaballs"));
-SYNFIG_LAYER_SET_CATEGORY(Metaballs,_("Default"));
+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,"$Id$");
Metaballs::Metaballs():
Layer_Composite(1.0,Color::BLEND_STRAIGHT),
- color(Color::black())
+ gradient(Color::black(), Color::white()),
+ threshold(0),
+ threshold2(1)
{
+ 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
return true;
}
- IMPORT(color);
+ IMPORT(gradient);
IMPORT(threshold);
+ IMPORT(threshold2);
return Layer_Composite::set_param(param,value);
}
ValueBase
Metaballs::get_param(const String ¶m)const
{
- EXPORT(color);
+ EXPORT(gradient);
EXPORT(radii);
EXPORT(weights);
EXPORT(centers);
EXPORT(threshold);
+ EXPORT(threshold2);
EXPORT_NAME();
EXPORT_VERSION();
{
Layer::Vocab ret(Layer_Composite::get_param_vocab());
- ret.push_back(ParamDesc("color")
- .set_local_name(_("Color"))
+ ret.push_back(ParamDesc("gradient")
+ .set_local_name(_("Gradient"))
);
ret.push_back(ParamDesc("centers")
);
ret.push_back(ParamDesc("threshold")
- .set_local_name(_("Threshold"))
+ .set_local_name(_("Gradient Left"))
+ );
+
+ ret.push_back(ParamDesc("threshold2")
+ .set_local_name(_("Gradient Right"))
);
return ret;
//sum up weighted functions
for(unsigned int i=0;i<centers.size();i++)
- {
density += weights[i] * densityfunc(pos,centers[i], radii[i]);
- }
- return density;
+ return (density - threshold) / (threshold2 - threshold);
}
Color
Metaballs::get_color(Context context, const Point &pos)const
{
- Real dens = totaldensity(pos);
-
- if(dens >= threshold)
- return color;
+ if(get_amount()==1.0 && get_blend_method()==Color::BLEND_STRAIGHT)
+ return gradient(totaldensity(pos));
else
- return context.get_color(pos);
+ 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();
-
- Real pw = renddesc.get_pw();
- Real ph = renddesc.get_ph();
+ 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);
- if(!context.accelerated_render(surface,quality,renddesc,&supercb))
- {
- if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
- return false;
- }
-
Point pos(tl[0],tl[1]);
- Real dens;
-
if(!context.accelerated_render(surface,quality,renddesc,&supercb))
{
if(cb)cb->error(strprintf(__FILE__"%d: Accelerated Renderer Failure",__LINE__));
{
pos[0] = tl[0];
for(int x = 0; x < w; x++, pos[0] += pw)
- {
- dens = totaldensity(pos);
-
- if(dens >= threshold)
- {
- (*surface)[y][x] = Color::blend(color,(*surface)[y][x],get_amount(),get_blend_method());
- }
- }
+ (*surface)[y][x] = Color::blend(gradient(totaldensity(pos)),(*surface)[y][x],get_amount(),get_blend_method());
}
// Mark our progress as finished