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-% Copyright 2006 by Till Tantau
-%
-% This file may be distributed and/or modified
-%
-% 1. under the LaTeX Project Public License and/or
-% 2. under the GNU Public License.
-%
-% See the file doc/generic/pgf/licenses/LICENSE for more details.
-
-\ProvidesFileRCS $Header: /cvsroot/pgf/pgf/generic/pgf/rendering/pgfrenderpoints.code.tex,v 1.2 2007/03/09 17:49:33 tantau Exp $
-
-
-
-
-
-% Create a 3D point
-%
-% #1 = macro name in which the point object should be stored
-% #2 to #4 = x-, y- and z-coordinate of the point
-%
-% Note:
-%
-% The quick version does not call \setlength and is faster.
-%
-% Example:
-%
-% \pgfrenderpointcreate{\pgfpoint{2pt+3cm}{3cm}}
-
-\def\pgfrenderpointcreate#1#2#3#4{%
- \pgfmathsetlength\pgf@xa{#2}%
- \pgfmathsetlength\pgf@xb{#3}%
- \pgfmathsetlength\pgf@xc{#4}%
- \pgfqrenderpointcreate{\the\pgf@xa}{\the\pgf@xb}{\the\pgf@xc}%
-}
-
-\def\pgfqrenderpointcreate#1#2#3#4{%
- \edef#1{\pgf@xa=#2\relax\pgf@xb=#3\pgf@xc=#4\relax}%
-}
-
-\def\pgf@render@unpack#1{%
- #1%
-}
-
-
-% The origin point object
-%
-% Description:
-%
-% This object is always the origin.
-%
-
-\pgfqrenderpointcreate\pgfrenderobjorigin{0pt}{0pt}{0pt}
-
-
-
-
-% Add two 3D vectors
-%
-% #1 = name of new vector (may be one of the input)
-% #2 = name of first vector
-% #3 = name of second vector
-%
-% Description:
-%
-% The points #2 and #3 are added and the result is stored in #1. If #1
-% equals either #2 or #3, to point is overwritten.
-%
-% Example:
-%
-% \pgfrenderpointcreate{\myvec}{1cm}{2cm}{3cm}
-% \pgfrenderpointcreate{\offset}{1cm}{0cm}{0cm}
-% \pgfrenderpointadd{\myvec}{\myvec}{\offset}
-
-\def\pgfrenderpointadd#1#2#3{%
- \pgf@render@unpack#2%
- \pgf@ya=\pgf@xa%
- \pgf@yb=\pgf@xb%
- \pgf@yc=\pgf@xc%
- \pgf@render@unpack#3%
- \advance\pgf@xa by\pgf@ya%
- \advance\pgf@xb by\pgf@yb%
- \advance\pgf@xc by\pgf@yc%
- \pgfqrenderpointcreate#1{\the\pgf@xa}{\the\pgf@xb}{\the\pgf@xc}%
-}
-
-
-% Scale a 3D vectors
-%
-% #1 = name of new vector (may be one of the input)
-% #2 = scale
-% #3 = name of vector to be scaled
-%
-% Description:
-%
-% Sets #1 := #2*#3.
-%
-% Example:
-%
-% \pgfrenderpointcreate{\myvec}{1cm}{2cm}{3cm}
-% \pgfrenderpointscale{\myvec}{2}{\myvec}
-
-\def\pgfrenderpointscale#1#2#3{%
- \pgf@render@unpack#3%
- \pgf@xa=#2\pgf@xa%
- \pgf@xb=#2\pgf@xb%
- \pgf@xc=#2\pgf@xc%
- \pgfqrenderpointcreate#1{\the\pgf@xa}{\the\pgf@xb}{\the\pgf@xc}%
-}
-
-
-
-
-% Project a 3D point to 2D
-%
-% #1 = 3D point object
-%
-% Description:
-%
-% This command takes a 3D point object and sets \pgf@x to the x-value
-% of the point and \pgf@y to the y-value.
-%
-% Example:
-%
-% \pgfpointprojection{\mypoint}
-
-\def\pgfpointprojection#1{%
- \pgf@render@unpack{#1}%
- \pgf@x=\pgf@xa%
- \pgf@y=\pgf@ya%
-}
-
-
-
-
-
-
-
-\endinput