/* === S Y N F I G ========================================================= */
/*! \file conicalgradient.cpp
-** \brief Template Header
+** \brief Implementation of the "Conical Gradient" layer
**
-** $Id: conicalgradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $
+** $Id$
**
** \legal
** Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
SYNFIG_LAYER_INIT(ConicalGradient);
SYNFIG_LAYER_SET_NAME(ConicalGradient,"conical_gradient");
-SYNFIG_LAYER_SET_LOCAL_NAME(ConicalGradient,_("Conical Gradient"));
-SYNFIG_LAYER_SET_CATEGORY(ConicalGradient,_("Gradients"));
+SYNFIG_LAYER_SET_LOCAL_NAME(ConicalGradient,N_("Conical Gradient"));
+SYNFIG_LAYER_SET_CATEGORY(ConicalGradient,N_("Gradients"));
SYNFIG_LAYER_SET_VERSION(ConicalGradient,"0.1");
-SYNFIG_LAYER_SET_CVS_ID(ConicalGradient,"$Id: conicalgradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $");
+SYNFIG_LAYER_SET_CVS_ID(ConicalGradient,"$Id$");
/* === P R O C E D U R E S ================================================= */
*/
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();
}