/* === S Y N F I G ========================================================= */
/*! \file spiralgradient.cpp
-** \brief Template Header
+** \brief Implementation of the "Spiral Gradient" layer
**
** $Id$
**
SYNFIG_LAYER_INIT(SpiralGradient);
SYNFIG_LAYER_SET_NAME(SpiralGradient,"spiral_gradient");
-SYNFIG_LAYER_SET_LOCAL_NAME(SpiralGradient,_("Spiral Gradient"));
-SYNFIG_LAYER_SET_CATEGORY(SpiralGradient,_("Gradients"));
+SYNFIG_LAYER_SET_LOCAL_NAME(SpiralGradient,N_("Spiral Gradient"));
+SYNFIG_LAYER_SET_CATEGORY(SpiralGradient,N_("Gradients"));
SYNFIG_LAYER_SET_VERSION(SpiralGradient,"0.1");
SYNFIG_LAYER_SET_CVS_ID(SpiralGradient,"$Id$");
dist-=floor(dist);
if(dist+supersample*0.5>1.0)
{
- Color pool(gradient(dist,supersample*0.5).premult_alpha()*(1.0-(dist-supersample*0.5)));
- pool+=gradient((dist+supersample*0.5)-1.0,supersample*0.5).premult_alpha()*((dist+supersample*0.5)-1.0);
+ float left(supersample*0.5-(dist-1.0));
+ float right(supersample*0.5+(dist-1.0));
+ Color pool(gradient(1.0-(left*0.5),left).premult_alpha()*left/supersample);
+ pool+=gradient(right*0.5,right).premult_alpha()*right/supersample;
return pool.demult_alpha();
}
if(dist-supersample*0.5<0.0)
{
- Color pool(gradient(dist,supersample*0.5).premult_alpha()*(dist+supersample*0.5));
- pool+=gradient(1.0-(dist-supersample*0.5),supersample*0.5).premult_alpha()*(-(dist-supersample*0.5));
+ float left(supersample*0.5-dist);
+ float right(supersample*0.5+dist);
+ Color pool(gradient(right*0.5,right).premult_alpha()*right/supersample);
+ pool+=gradient(1.0-left*0.5,left).premult_alpha()*left/supersample;
return pool.demult_alpha();
}
}
float
-SpiralGradient::calc_supersample(const synfig::Point &x, float pw,float ph)const
+SpiralGradient::calc_supersample(const synfig::Point &x, float pw,float /*ph*/)const
{
return (1.41421*pw/radius+(1.41421*pw/Point(x-center).mag())/(PI*2))*0.5;
}