doc-en/.svn/text-base/par-face-en.tex.svn-base

   1 \section{One- and two-sided solids}
   2
   3 The contour of \Lkeyword{face} is defined in the plane $Oxy$ by
   4 \begin{verbatim}
   5 \psSolid[object=face,base=x1 y1 x2 y2 x3 y3 ...xn yn](0,0,0)%
   6 \end{verbatim}
   7 The edge of \Lkeyword{face} is defined in the plane $Oxy$ by the coordinates
   8 of its vertices, given in counterclockwise order by the parameter \Lkeyword{base}:
   9
  10
  11 \clearpage
  12 \subsection{Triangular \texttt{`faces'}}
  13
  14 \begin{LTXexample}[width=6.5cm]
  15 \psset{unit=0.4}
  16 \psset{viewpoint=50 -20 30 rtp2xyz,Decran=50}
  17 \begin{pspicture}(-5.5,-4.5)(7,3.5)
  18 \psSolid[object=grille,base=-4 6 -4 4,action=draw,linecolor=gray](0,0,0)
  19 \psSolid[object=face,fillcolor=yellow,action=draw*,
  20   incolor=blue,biface,base=0 0 3 0 1.5 3,
  21   num=all,show=all](0,1,0)
  22 \psSolid[object=face,fillcolor=yellow,
  23   action=draw*,incolor=blue,
  24   base=0 0 3 0 1.5 3,num=all,
  25   show=all,biface,RotX=180](0,-1,0)
  26 \axesIIID(0,0,0)(6,6,3)
  27 \end{pspicture}
  28 \end{LTXexample}
  29
  30
  31 \subsection{\texttt{`face'} defined by a function}
  32 \begin{LTXexample}[width=7.5cm]
  33 \psset{unit=0.45}
  34 \psset{viewpoint=50 -20 30 rtp2xyz,Decran=50}
  35 \def\BASE{0 10 360{/Angle ED 5 Angle cos dup mul mul % x
  36  3 Angle cos 3 exp Angle sin mul mul } for}% y
  37 \begin{pspicture}(-7,-5.5)(9,6)
  38 \defFunction[algebraic]{F}(t){5*(cos(t))^2}
  39    {3*(sin(t))*(cos(t))^3}{}
  40 \psSolid[object=grille,base=-6 6 -6 6,action=draw,linecolor=gray](0,0,0)
  41 \psSolid[object=face,fillcolor=magenta,action=draw*,
  42   incolor=blue,biface,RotZ=90,
  43   base=0 2 pi mul {F} CourbeR2+](0,0,0)
  44 \psSolid[object=face,fillcolor=yellow,action=draw*,
  45   incolor=blue,biface,
  46   base=0 2 pi mul {F} CourbeR2+](0,0,0)
  47 \psSolid[object=face,fillcolor=yellow,action=draw*,
  48   incolor=blue,biface,RotY=180,
  49   base=0 2 pi mul {F} CourbeR2+](0,0,0)
  50 \psSolid[object=face,fillcolor=yellow,action=draw*,
  51   incolor=red,biface,RotY=180,RotZ=90,
  52   base=0 2 pi mul {F} CourbeR2+](0,0,0)
  53 \axesIIID(0,0,0)(6,6,5)
  54 \end{pspicture}
  55 \end{LTXexample}
  56
  57
  58
  59 \endinput