X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftrunk%2Fsrc%2Fmodules%2Fmod_gradient%2Flineargradient.cpp;h=f8bf419b074953b0ee8800348ac8805942c7d0b6;hb=49dafb45e1b8dcb299ed9a992a011566c8c6c7bf;hp=f14bec28842fbbf8303bdcf88cbad09620ecb368;hpb=5ddcf36f04cfbd10fabda4e3c5633cb27cdd4c0a;p=synfig.git

diff --git a/synfig-core/trunk/src/modules/mod_gradient/lineargradient.cpp b/synfig-core/trunk/src/modules/mod_gradient/lineargradient.cpp
index f14bec2..f8bf419 100644
--- a/synfig-core/trunk/src/modules/mod_gradient/lineargradient.cpp
+++ b/synfig-core/trunk/src/modules/mod_gradient/lineargradient.cpp
@@ -1,8 +1,10 @@
-/*! ========================================================================
-** Synfig
-** Template File
-** $Id: lineargradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $
+/* === S Y N F I G ========================================================= */
+/*!	\file lineargradient.cpp
+**	\brief Template Header
 **
+**	$Id$
+**
+**	\legal
 **	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
 **
 **	This package is free software; you can redistribute it and/or
@@ -14,6 +16,7 @@
 **	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
 **
 ** === N O T E S ===========================================================
 **
@@ -50,7 +53,7 @@ SYNFIG_LAYER_SET_NAME(LinearGradient,"linear_gradient");
 SYNFIG_LAYER_SET_LOCAL_NAME(LinearGradient,_("Linear Gradient"));
 SYNFIG_LAYER_SET_CATEGORY(LinearGradient,_("Gradients"));
 SYNFIG_LAYER_SET_VERSION(LinearGradient,"0.0");
-SYNFIG_LAYER_SET_CVS_ID(LinearGradient,"$Id: lineargradient.cpp,v 1.1.1.1 2005/01/04 01:23:10 darco Exp $");
+SYNFIG_LAYER_SET_CVS_ID(LinearGradient,"$Id$");
 
 /* === P R O C E D U R E S ================================================= */
 
@@ -94,14 +97,20 @@ LinearGradient::color_func(const Point &point, float supersample)const
 	{
 		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);
+			if (zigzag) pool+=gradient(1.0-right*0.5,right).premult_alpha()*right/supersample;
+			else		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);
+			if (zigzag) pool+=gradient(left*0.5,left).premult_alpha()*left/supersample;
+			else		pool+=gradient(1.0-left*0.5,left).premult_alpha()*left/supersample;
 			return pool.demult_alpha();
 		}
 	}