/* === S Y N F I G ========================================================= */
/*! \file metaballs.cpp
-** \brief Implements metaballs
+** \brief Implementation of the "Metaballs" layer
**
-** $Id: metaballs.cpp,v 1.1.1.1 2005/01/04 01:23:09 darco Exp $
+** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
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.cpp,v 1.1.1.1 2005/01/04 01:23:09 darco Exp $");
+SYNFIG_LAYER_SET_CVS_ID(Metaballs,"$Id$");
/* === P R O C E D U R E S ================================================= */
Metaballs::Metaballs():
Layer_Composite(1.0,Color::BLEND_STRAIGHT),
- color(Color::black())
+ 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_as(centers))
+ if( param=="centers" && value.same_type_as(centers))
{
centers = value;
return true;
}
-
- if( param=="weights" && value.same_as(weights))
+
+ if( param=="weights" && value.same_type_as(weights))
{
weights = value;
return true;
}
-
- if( param=="radii" && value.same_as(radii))
+
+ if( param=="radii" && value.same_type_as(radii))
{
radii = value;
return true;
}
-
- IMPORT(color);
+
+ IMPORT(gradient);
IMPORT(threshold);
-
+ IMPORT(threshold2);
+ IMPORT(positive);
+
return Layer_Composite::set_param(param,value);
}
ValueBase
Metaballs::get_param(const String ¶m)const
{
- EXPORT(color);
-
+ EXPORT(gradient);
+
EXPORT(radii);
- EXPORT(weights);
+ EXPORT(weights);
EXPORT(centers);
EXPORT(threshold);
+ EXPORT(threshold2);
+ EXPORT(positive);
EXPORT_NAME();
EXPORT_VERSION();
-
- return Layer_Composite::get_param(param);
+
+ 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("color")
- .set_local_name(_("Color"))
+
+ 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(_("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;
}
-static inline Real densityfunc(const synfig::Point &p, const synfig::Point &c, Real R)
+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
+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;
+
+ 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__));
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)
- {
- 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
projects / synfig.git / blobdiff