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%%%%%%%%%%%%%%%%%%%%%%%%%%%% -*- Mode: Plain-Tex -*- %%%%%%%%%%%%%%%%%%%%%%%%%%
%% pst-ghsb.tex --- For the PSTricks HSB mode gradient fillstyle
%% Based on pst-grad.tex from Timothy van Zandt
%%
%% Take care that Hue value is cyclic, so 1=0 !
%%
%% Author : Denis GIROU (CNRS/IDRIS - France) <Denis.Girou@idris.fr>
%% Created the : Tue May 13 11:12:36 1997
%% Last mod. by : Denis GIROU (CNRS/IDRIS - France) <Denis.Girou@idris.fr>
%% Last mod. the : Thu Jan 29 17:20:13 1998
%% Last mod. by : Herert Voss <voss _at_ pstricks.de>
%% Last mod. the : June 06 2004
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\def\fileversion{1.2}
\def\filedate{2004/06/23}
%% This program can be redistributed and/or modified under the terms
%% of the LaTeX Project Public License Distributed from CTAN
%% archives in directory macros/latex/base/lppl.txt.
%
%% This defines a new fill style, "gradient", for use with PSTricks,
%% which has gradiated color. The following parameters are used:
%%
%% gradbegin=color : Beginning color.
%% gradend=color : Final color.
%% gradlines=int : Number of lines to use. The higher the number,
%% the slower the rendering.
%% gradmidpoint=num : Gradient color goes from gradbegin to gradend,
%% and then back to beginning. Midpoint (point
%% where "gradend" color appears, is gradmidpoint
%% from the top. (0 <= Gmidpoint <= 1).
%% gradangle=angle : Rotate image by angle.
%% GradientCircle=true : Instead of a linear a circled gradient is build.
%% (version 1.04)
%% GradientPos=(x,y) : the center of the circled gradient
%% (version 1.04)
%% GradientScale=float : scaling factor of the circled gradient
%% (version 1.04)
%%
\message{ v\fileversion, \filedate}
\csname GradientHSBLoaded\endcsname
\let\GradientHSBLoaded\endinput
\ifx\PSTricksLoaded\endinput\else
\def\next{\input pstricks.tex }\expandafter\next
\fi
\edef\TheAtCode{\the\catcode`\@}
\catcode`\@=11
\pstheader{pst-ghsb.pro}
\newrgbcolor{gradbegin}{0 .1 .95}
\def\psset@gradbegin#1{\pst@getcolor{#1}\psgradbegin}
\psset@gradbegin{gradbegin}
\newrgbcolor{gradend}{0 1 1}
\def\psset@gradend#1{\pst@getcolor{#1}\psgradend}
\psset@gradend{gradend}
\def\psset@gradlines#1{%
\pst@getint{#1}\psgradlines
\ifnum\psgradlines<2
\@pstrickserr{gradlines must be at least 2}\@epha
\def\psgradlines{2 }%
\fi}
\psset@gradlines{300}
\def\psset@gradmidpoint#1{\pst@checknum{#1}\psgradmidpoint}
\psset@gradmidpoint{.9}
\def\psset@gradangle#1{\pst@getangle{#1}\psk@gradangle}
\psset@gradangle{0}
% Herbert Voss 2004-06-23
% To define the gradient as linear or as circle
\newif\ifGradientCircle
\def\psset@GradientCircle#1{\@nameuse{GradientCircle#1}}
\psset@GradientCircle{false}
% Position of the center of the gradient
\def\psset@GradientPos#1{\psset@@GradientPos#1}
\def\psset@@GradientPos(#1){\edef\ps@GradientPos{#1}}
\psset@GradientPos{(0,0)}
% Scale factor
\def\psset@GradientScale#1{\edef\ps@GradientScale{#1}}
\psset@GradientScale{1}
\newif\ifgradientHSB
\def\psset@gradientHSB#1{\@nameuse{gradientHSB#1}}
\psset@gradientHSB{false}
\def\psfs@gradient{%
\ifgradientHSB
\addto@pscode{%
gsave
gsave \pst@usecolor\psgradbegin currenthsbcolor grestore
gsave \pst@usecolor\psgradend currenthsbcolor grestore
\psgradlines
\psgradmidpoint
\psk@gradangle
% hv 2004-05-05 begin fixed a spurious blank
tx@GradientHSBDict begin GradientFillHSB end grestore%
}%
% tx@GradientHSBDict begin GradientFillHSB end grestore}
% hv 2004-05-05 end
\else%
% hv 2004-06-25 begin fixed a spurious blank
\pst@getcoor{\ps@GradientPos}{\pst@tempa}% <- "%" hv 2004-06-23
% hv end
\addto@pscode{%
gsave
\ifGradientCircle true \else false \fi
\ps@GradientScale\space
\pst@tempa\space
gsave \pst@usecolor\psgradbegin currentrgbcolor grestore
gsave \pst@usecolor\psgradend currentrgbcolor grestore
\psgradlines
\psgradmidpoint
\psk@gradangle
tx@GradientDict begin GradientFill end grestore%
}%
\fi%
}
\catcode`\@=\TheAtCode\relax
\endinput
%% END pst-ghsb.tex
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