doc-en/par-projectiontexte-en.tex

   1 \section{Text}
   2
   3 The object \Lkeyword{texte} of the macro \Lcs{psProjection} allows us
   4 to \Index{project} character strings onto planes.
   5
   6 \subsection{The parameters and the options}
   7
   8 There are three parameters:\Lkeyword{text} which defines the
   9 string, \Lkeyword{fontsize}, which gives the dimension of the font
  10 in points (remember: 28.45~pts correspond to 1~cm), and finally
  11 \Lkeyword{pos}, which defines the position of the \Index{text}. By
  12 default, the text is centred at the origin of the plane.
  13
  14 This last parameter needs some explanation. See the string
  15  \texttt{petit texte} represented below.
  16 \begin{center}
  17 \begin{pspicture}(-5,-2)(5,2)
  18 \rput(0,0){\psframebox[linestyle=none,fillstyle=solid,
  19    fillcolor=yellow!50,framesep=0pt]{\phantom{\timesnormal petit texte}}}
  20 \rput(0,0){\rnode[lb]{A}{\rnode[rb]{B}{\rnode[rt]{C}{%
  21     \rnode[lt]{D}{\rnode[l]{E}{\rnode[r]{F}{%
  22     \rnode[t]{G}{\rnode[b]{H}{\timesnormal petit texte}}}}}}}}}
  23 %\psset{nodesep=5pt}
  24 \ncline{A}{B}\ncline{B}{C}\ncline{C}{D}\ncline{D}{A}
  25 \pnode({A}){A'}
  26 \pnode({B}){B'}
  27 \pnode({C}){C'}
  28 \pnode({D}){D'}
  29 \pnode({E}){E'}
  30 \pnode({F}){F'}
  31 \pnode({G}){G'}
  32 \pnode({H}){H'}
  33 \rput(A){\pnode(0,\baselineskip){B1}}
  34 \rput(B){\pnode(0,\baselineskip){B2}}
  35 \psdots(A')(B')(C')(D')(E')(F')(G')(H')(B1)(B2)(0,0)
  36 \psline(B1)(B2)
  37 \pnode(! \GetCenter{A} A.x 0.5 sub A.y 0.5 sub){A1}
  38 \ncline{->}{A}{A1}
  39 \uput[dl](A1){\texttt{dl}}
  40 \pnode(! \GetCenter{B1} B1.x 0.5 sub B1.y){B1l}
  41 \ncline{->}{B1}{B1l}
  42 \uput[l](B1l){\texttt{bl}}
  43 \pnode(! \GetCenter{E} E.x 0.5 sub E.y){El}
  44 \ncline{->}{E}{El}
  45 \uput[l](El){\texttt{cl}}
  46 \pnode(! \GetCenter{D} D.x 0.5 sub D.y 0.5 add){Dl}
  47 \ncline{->}{D}{Dl}
  48 \uput[ul](Dl){\texttt{ul}}
  49 \pnode(! \GetCenter{G} G.x G.y 0.5 add){Gu}
  50 \ncline{->}{G}{Gu}
  51 \uput[u](Gu){\texttt{uc}}
  52 \pnode(! \GetCenter{H} H.x H.y 0.5 sub){Hd}
  53 \ncline{->}{H}{Hd}
  54 \uput[d](Hd){\texttt{dc}}
  55 \pnode(! \GetCenter{C} C.x 0.5 add C.y 0.5 add){Cr}
  56 \ncline{->}{C}{Cr}
  57 \uput[ur](Cr){\texttt{ur}}
  58 \pnode(! \GetCenter{B} B.x 0.5 add B.y 0.5 sub){Br}
  59 \ncline{->}{B}{Br}
  60 \uput[dr](Br){\texttt{dr}}
  61 \pnode(! \GetCenter{B2} B2.x 0.5 add B2.y){B2r}
  62 \ncline{->}{B2}{B2r}
  63 \uput[r](B2r){\texttt{br}}
  64 \pnode(! \GetCenter{F} F.x 0.5 add F.y){Fr}
  65 \ncline{->}{F}{Fr}
  66 \uput[r](Fr){\texttt{cr}}
  67 \end{pspicture}
  68 \end{center}
  69
  70 We have $4$~horizontal reference lines: the bottom line
  71 \verb+(d)own+, the base line \verb+(b)aseline+, the median line,
  72 or centre line \verb+(c)enter+, and the upper line \verb+(u)p+.
  73
  74 There are as well $4$~vertical reference lines: the left line
  75 \verb+(l)eft+, the base line \verb+(b)aseline+, the centre line
  76 \verb+(c)enter+ and the right line \verb+(r)ight+. In the case of
  77 strings, the two vertical lines \verb+l+ and \verb+b+ might be
  78 indistinguishable and easily confounded.
  79
  80 The intersection of the $4$ horizontal lines with the $4$ vertical
  81 lines gives us $16$~positioning point possibilities \verb+dl+,
  82 \verb+bl+, \verb+cl+, \verb+ul+, \verb+db+, \verb+bb+, \verb+cb+,
  83 \verb+ub+, \verb+dc+, \verb+bc+, \verb+cc+, \verb+uc+, \verb+dr+,
  84 \verb+br+, \verb+cr+, \verb+ur+.
  85
  86 Of these, $4$~are considered as \textit{inner points}: \verb+bb+,
  87 \verb+bc+, \verb+cb+ and \verb+cc+.
  88
  89 When the parameter \Lkeyword{pos} of \Lcs{psProjection} is assigned
  90 one of these four inner points, it means that the latter will be
  91 situated at the origin of the plane of projection.
  92
  93 When the parameter \Lkeyword{pos} of \Lcs{psProjection} is assigned
  94 one of the twelve remaining points, it indicates the direction in
  95 which the text will be positioned relative to the origin of the
  96 plane of projection.
  97
  98 For example, \verb+\psProjection[...,pos=uc](0,0)+ indicates that
  99 the text will be centred relative to the point $(0,0)$ and
 100 situated above it.
 101
 102 %% Le plan doit \^{e}tre d\'{e}fini par son origine
 103 %% \Cadre{$\mathtt{(x_0ny_0,z_0)}$} et la normale %$
 104 %% \Cadre{\texttt{[normal=1 0 0 90]}}. Pour les particularit\'{e}s
 105 %% de la d\'{e}finition de la normale, car il y a trois fa\c{c}ons de le faire !
 106 %% Tous les d\'{e}tails sont dans la partie \Cadre{\texttt{``Choisir un plan
 107 %%     par son origine et une normale''}} de la documentation de
 108 %% \texttt{doc-psProjection}.
 109
 110 %% La taille de la fonte doit \^{e}tre fix\'{e}e en points avec l'option
 111 %% . .
 112
 113
 114 \subsection{Examples of projecting onto a plane}
 115
 116 \subsubsection{Example 1: \Index{projection} onto $Oxy$, with the option \texttt{pos=bc}}
 117
 118 \begin{LTXexample}[width=8cm]
 119 \begin{pspicture}(-4,-1.5)(4,1.5)
 120 \psset{solidmemory}
 121 \psset{lightsrc=10 0 10,
 122    viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 123 \psSolid[object=plan,definition=normalpoint,plangrid,
 124    base=-4 4 -1 1,args={0 0 0 [0 0 1]},name=monplan,]
 125 \psProjection[object=texte,
 126    fontsize=20,linecolor=red,
 127    pos=bc,plan=monplan,
 128    text=j'aimerais tant voir Syracuse,
 129 ](0,0)%
 130 \axesIIID(0,0,0)(4,2,1)
 131 \composeSolid
 132 \end{pspicture}
 133 \end{LTXexample}
 134
 135 \subsubsection{Example 2: \Index{projection} onto $Oxy$, centred text}
 136
 137 \begin{LTXexample}[width=8cm]
 138 \begin{pspicture}(-4,-1.5)(4,1.5)
 139 \psset{solidmemory}
 140 \psset{lightsrc=10 0 10,
 141    viewpoint=50 -90 89.99 rtp2xyz,,Decran=50}
 142 \psSolid[object=plan,definition=normalpoint,plangrid,
 143    base=-4 4 -1 1,args={0 0 0 [0 0 1]},name=monplan,]
 144 \psProjection[object=texte,
 145    fontsize=20,linecolor=red,
 146    text= L'\^{\i}le de P\^{a}ques et Kairouan,
 147    plan=monplan]%
 148 \axesIIID(0,0,0)(4,2,1)
 149 \end{pspicture}
 150 \end{LTXexample}
 151
 152
 153 \subsubsection{Example 3: \Index{projection} onto $Oxy$,  with different options
 154 \texttt{pos=dl, etc.}}
 155
 156 \begin{center}
 157 \psset{unit=.8}
 158 \begin{pspicture}(-4,-1.5)(4,1.5)
 159 \psset{solidmemory}
 160 \psset{lightsrc=10 0 10,viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 161 \psSolid[object=plan,definition=normalpoint,plangrid,
 162    base=-10 10 -1 1,args={0 0 0 [0 0 1]},name=monplan,]
 163 \psProjection[object=texte,
 164    fontsize=20,linecolor=red,
 165    text=Et les grands oiseaux qui s'amusent,
 166    pos=dl,
 167    plan=monplan]%
 168 \axesIIID(0,0,0)(8,1,1)
 169 \rput(0,-1.5){\Cadre{\texttt{[pos=dl]}}}
 170 \end{pspicture}
 171 \end{center}
 172
 173 \begin{center}
 174 \psset{unit=.8}
 175 \begin{pspicture}(-4,-1.5)(4,1.5)
 176 \psset{solidmemory}
 177 \psset{lightsrc=10 0 10,viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 178 \psSolid[object=plan,definition=normalpoint,plangrid,
 179    base=-10 10 -1 1,args={0 0 0 [0 0 1]},name=monplan,]
 180 \psProjection[object=texte,
 181    fontsize=20,linecolor=red,
 182    text= A glisser l'aile sous le vent.,
 183    pos=dr,
 184    plan=monplan]%
 185 \axesIIID(0,0,0)(8,1,1)
 186 \rput(0,-1.5){\Cadre{\texttt{[pos=dr]}}}
 187 \end{pspicture}
 188 \end{center}
 189
 190 \begin{center}
 191 \psset{unit=.8}
 192 \begin{pspicture}(-4,-1.5)(4,1.5)
 193 \psset{solidmemory}
 194 \psset{lightsrc=10 0 10,viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 195 \psSolid[object=plan,definition=normalpoint,plangrid,
 196    base=-10 10 -1 1,args={0 0 0 [0 0 1]},name=monplan,]
 197 \psProjection[object=texte,
 198    fontsize=20,linecolor=red,
 199    text=Avant que ma jeunesse s'use,
 200    pos=ur,
 201    plan=monplan]%
 202 \axesIIID(0,0,0)(8,1,1)
 203 \rput(0,-1.5){\Cadre{\texttt{[pos=ur]}}}
 204 \end{pspicture}
 205 \end{center}
 206
 207 \begin{center}
 208 \psset{unit=.8}
 209 \begin{pspicture}(-4,-1.5)(4,1.5)
 210 \psset{solidmemory}
 211 \psset{lightsrc=10 0 10,viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 212 \psSolid[object=plan,definition=normalpoint,plangrid,
 213    base=-10 10 -1 1,args={0 0 0 [0 0 1]},name=monplan,]
 214 \psProjection[object=texte,
 215    fontsize=20,linecolor=red,
 216    text=Et que mes printemps soient partis,
 217    pos=ul,
 218    plan=monplan]%
 219 \axesIIID(0,0,0)(8,1,1)
 220 \rput(0,-1.5){\Cadre{\texttt{[pos=ul]}}}
 221 \end{pspicture}
 222 \end{center}
 223
 224 \begin{center}
 225 \psset{unit=.8}
 226 \begin{pspicture}(-4,-1.5)(4,1.5)
 227 \psset{solidmemory}
 228 \psset{lightsrc=10 0 10,viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 229 \psSolid[object=plan,definition=normalpoint,plangrid,
 230    base=-10 10 -1 1,args={0 0 0 [0 0 1]},name=monplan,]
 231 \psProjection[object=texte,
 232    fontsize=20,linecolor=red,
 233    text=J'aimerais tant voir Syracuse,
 234    pos=uc,
 235    plan=monplan]%
 236 \axesIIID(0,0,0)(8,1,1)
 237 \rput(0,-1.5){\Cadre{\texttt{[pos=uc]}}}
 238 \end{pspicture}
 239 \end{center}
 240
 241 \begin{center}
 242 \psset{unit=.8}
 243 \begin{pspicture}(-4,-1.5)(4,1.5)
 244 \psset{solidmemory}
 245 \psset{lightsrc=10 0 10,viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 246 \psSolid[object=plan,definition=normalpoint,plangrid,
 247    base=-10 10 -1 1,args={0 0 0 [0 0 1]},name=monplan,]
 248 \psProjection[object=texte,
 249    fontsize=20,linecolor=red,
 250    text=Pour m'en souvenir \`{a} Paris.,
 251    pos=dc,
 252    plan=monplan]%
 253 \axesIIID(0,0,0)(8,1,1)
 254 \rput(0,-1.5){\Cadre{\texttt{[pos=dc]}}}
 255 \end{pspicture}
 256 \end{center}
 257
 258 \subsubsection{Example 4: \Index{projection} onto $Oxy$ with text rotation}
 259
 260 \begin{LTXexample}[width=8cm]
 261 \begin{pspicture}(-4,-3)(4,3)
 262 \psset{solidmemory}
 263 \psset{lightsrc=10 0 10,
 264    viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 265 \psSolid[object=plan,definition=normalpoint,plangrid,
 266    base=-4 4 -3 3,args={0 0 0 [0 0 1]},name=monplan,]
 267 \psset{plan=monplan}
 268 \psProjection[object=texte,
 269    fontsize=28.45,linecolor=gray!50,
 270    text=Tournez man\`{e}ges]%
 271 \psProjection[object=texte,
 272    fontsize=28.45,linecolor=red,
 273    text=Tournez man\`{e}ges,
 274    phi=60]%
 275 \axesIIID(0,0,0)(4,3,1)
 276 \end{pspicture}
 277 \end{LTXexample}
 278 The text rotation is introduced by the parameter \texttt{phi=60}.
 279
 280 \subsubsection{Example 5: positioning text at a point}
 281
 282 \begin{LTXexample}[width=8cm]
 283 \begin{pspicture}(-4,-3)(4,3)
 284 \psset{solidmemory}
 285 \psset{viewpoint=50 -90 89.99 rtp2xyz,Decran=50}
 286 \psSolid[object=plan,definition=normalpoint,plangrid,
 287    base=-4 4 -3 3,args={0 0 0 [0 0 1]},name=monplan,]
 288 \psset{fontsize=28.45,plan=monplan}
 289 \psProjection[object=texte,
 290    linecolor=green,
 291    text=ici](-2,-2)
 292 \psProjection[object=texte,
 293    linecolor=red,
 294    text=ou]%
 295 \psProjection[object=texte,
 296    linecolor=blue,
 297    text=l\`{a}](2,2)
 298 \psPoint(0,0,0){O}
 299 \psPoint(-2,-2,0){O1}
 300 \psPoint(2,2,0){O2}
 301 \psdots[dotsize=0.2](O)(O1)(O2)
 302 \axesIIID(0,0,0)(4,4,1)
 303 \end{pspicture}
 304 \end{LTXexample}
 305
 306 \subsection{Examples for \Index{projecting} onto a face of a solid}
 307
 308 \subsubsection{Method}
 309
 310 The solid must be memorised with the general option
 311 \texttt{$\backslash$psset$\{$solidmemory$\}$}. The first thing to %$
 312 do is to find the numbers of the faces of the solid with the
 313 option \texttt{\Lkeyword{numfaces}=\Lkeyval{all}}.
 314 \begin{LTXexample}[width=8cm]
 315 \psset{viewpoint=50 20 30 rtp2xyz,Decran=100}
 316 \begin{pspicture}(-4,-4)(4,4)
 317 \psSolid[object=cube,a=2,action=draw,
 318    linecolor=red,numfaces=all]%
 319 \axesIIID(1,1,1)(2,2,2)
 320 \end{pspicture}
 321 \end{LTXexample}
 322
 323 Then we define the projection plane as the chosen face, where in
 324 this case we put \texttt{A} on the face with the index number 0:
 325
 326
 327 Then we define the projection plane by a chosen face, there we put \texttt{A} on the face with the index number 0:
 328 \begin{verbatim}
 329 \psSolid[object=plan,definition=solidface,args=A 0,name=P0]
 330 \psProjection[object=texte,linecolor=red,text=A,plan=P0]%
 331 \end{verbatim}
 332
 333
 334 \begin{LTXexample}[width=8cm]
 335 \psset{viewpoint=50 20 30 rtp2xyz,Decran=50}
 336 \begin{pspicture}(-4,-4)(4,5)
 337 \psset{unit=0.5}
 338 \psset{solidmemory}
 339 \psSolid[object=cube,a=8,action=draw,name=A,linecolor=red]%
 340 \psset{fontsize=100}
 341 \psSolid[object=plan,action=none,
 342    definition=solidface,args=A 0,name=P0]
 343 \psProjection[object=texte,linecolor=red,text=A,plan=P0]%
 344 \psSolid[object=plan,action=none,
 345    definition=solidface,args=A 1,name=P1]
 346 \psProjection[object=texte,linecolor=red,text=B,plan=P1]%
 347 \psSolid[object=plan,action=none,
 348    definition=solidface,args=A 4,name=P4]
 349 \psProjection[object=texte,linecolor=red,text=E,plan=P4]%
 350 \axesIIID(4,4,4)(6,6,6)
 351 \end{pspicture}
 352 \end{LTXexample}
 353
 354 \subsubsection{Text rotation with the option \texttt{phi}}
 355
 356 \begin{LTXexample}[width=8cm]
 357 \psset{viewpoint=50 20 30 rtp2xyz,Decran=50}
 358 \psset{unit=0.4}
 359 \begin{pspicture}(-8,-7)(4,9)
 360 \psset{solidmemory}
 361 \psSolid[object=cube,a=8,action=draw,linecolor=red,name=A]%
 362 \psset{fontsize=200}
 363 \psSolid[object=plan,action=none,
 364    definition=solidface,args=A 0,name=P0]
 365 \psProjection[object=texte,linecolor=gray,text=A,plan=P0]%
 366 \psset{phi=90}
 367 \psProjection[object=texte,linecolor=red,text=A,plan=P0]%
 368 \axesIIID(4,4,4)(6,6,6)
 369 \end{pspicture}
 370 \end{LTXexample}
 371
 372
 373 \subsection{Examples of \Index{projecting} onto different faces of a solid}
 374
 375 \definecolor{rose}{rgb}{1,0.75,0.74}
 376
 377 \def\JuangJie{%
 378 \begin{pspicture}(-3.5,-2)(3.5,4)
 379 \psframe[fillcolor=cyan!50,fillstyle=solid](-3.5,-2)(3.5,4)%
 380 \psSolid[object=cylindre,r=8,h=0.2,ngrid=1 36,action=draw**,hue=0.5 0.6]%
 381 \psSolid[object=cube,a=8,h=0.2,ngrid=1 36,action=draw**,color1=magenta!50,
 382   color2=red!20,color3=yellow!50,color4=green!50,
 383   fcol=0 (color1) 1 (color2) 2 (color3) 3 (color4) 4(White)](0,0,4.2)%
 384 \psset{solidmemory}%
 385 \psSolid[object=cube,a=8,
 386    name=A,
 387    action=none](0,0,4.2)%
 388 %% la face 0
 389 \psSolid[object=plan,action=none,definition=solidface,
 390    base=-4 4 -4 4,args=A 0,name=P0]%
 391 %\psSolid[object=plan,definition=plan,action=none,args=P0,planmarks,action=none,]%
 392 \psset{fontsize=30,plan=P0}%
 393 \psProjection[object=texte,text=po\`{e}me](0,3)%
 394 \psProjection[object=texte,text=de](0,2)%
 395 \psset{fontsize=55}
 396 \psProjection[object=texte,linecolor=red,text=Juang Jie]
 397 %% la face 4
 398 \psSolid[object=plan,action=none,definition=solidface,base=-4 4 -4 4,args=A 4,phi=-90,name=P4]%
 399 %\psSolid[object=plan,definition=plan,action=none,args=P4,fontsize=10,planmarks,action=none]%
 400 \psset{fontsize=28.45,pos=bc,plan=P4}
 401 \psProjection[object=texte,text={Dans ma jeunesse,}](0,3)%
 402 \psset{fontsize=20}
 403 \psProjection[object=texte,text=j'\'{e}coutais le son de la pluie](0,2)%
 404 \psProjection[object=texte,text=dans les maisons de plaisir](0,1)%
 405 \psProjection[object=texte,text=les tentures frissonnaient]%
 406 \psProjection[object=texte,text=sous la lumi\`{e}re rouge](0,-1)%
 407 \psProjection[object=texte,text=des cand\'{e}labres](0,-2)%
 408 %% la face 1
 409 \psSolid[object=plan,action=none,definition=solidface,base=-4 4 -4 4,args=A 1,phi=180,name=P1]%
 410 %\psSolid[object=plan,definition=plan,action=none,args=P1,fontsize=10,planmarks,action=none]%
 411 \psset{plan=P1}
 412 \psProjection[object=texte,fontsize=25,text=Dans mon \^{a}ge m\^{u}r](0,3)%
 413 \psProjection[object=texte,text=j'ai \'{e}cout\'{e} le son de la pluie](0,2)%
 414 \psProjection[object=texte,fontsize=18,text={en voyage, \`{a} bord d'un bateau}](0,1)%
 415 \psProjection[object=texte,text=les nuages pesaient bas]%
 416 \psProjection[object=texte,text=sur l'immensit\'{e} du fleuve](0,-1)%
 417 \psProjection[object=texte,text=une oie sauvage ](0,-2)%
 418 \psProjection[object=texte,text=s\'{e}par\'{e}e de ses soeurs](0,-3)%
 419 %% la face 2
 420 \psSolid[object=plan,action=none,definition=solidface,base=-4 4 -4 4,args=A 2,phi=180,name=P2]%
 421 %\psSolid[object=plan,definition=plan,action=none,args=P2,fontsize=10,planmarks,action=none]%
 422 \psset{plan=P2}
 423 \psProjection[object=texte,text=appelait dans le vent d'ouest](0,3)%
 424 \psProjection[object=texte,text={Aujourd'hui,}](0,2)%
 425 \psProjection[object=texte,text=j'\'{e}coute le son de la pluie](0,1)%
 426 \psProjection[object=texte,text=sous le charme]%
 427 \psProjection[object=texte,text=d'un ermitage monastique](0,-1)%
 428 \psProjection[object=texte,text=Ma t\^{e}te est chenue](0,-2)%
 429 \psProjection[object=texte,text=chagrins et bonheurs](0,-3)%
 430 %% la face 3
 431 \psSolid[object=plan,action=none,definition=solidface,args=A 3,phi=180,name=P3]%
 432 %\psSolid[object=plan,definition=plan,action=none,args=P3,fontsize=10,planmarks,action=none]%
 433 \psset{plan=P3}
 434 \psProjection[object=texte,text=s\'{e}parations et retrouvailles](0,3)%
 435 \psProjection[object=texte,text=tout est vanit\'{e}](0,2)%
 436 \psProjection[object=texte,text={Dehors, sur les marches}](0,1)%
 437 \psProjection[object=texte,text=les gouttes tambourinent]%
 438 \psProjection[object=texte,text= jusqu'\`{a} l'aube](0,-1)%
 439 \psProjection[object=texte,text=Juang Jie ](0,-3)%
 440 \composeSolid
 441 \end{pspicture}}
 442
 443 \def\MollyBloom{%
 444 %\psset{lightsrc=-15 -9 5}
 445 %\psset{viewpoint=20 -150 30 rtp2xyz,Decran=11}
 446 \psset{solidmemory,visibility}
 447 %% le plan de base
 448 \psSolid[object=plan,
 449    definition=equation,
 450    ngrid=1. 1.,
 451    args={[0 0 1 0]},linecolor=red,
 452    base=-8 10 -8 8,
 453    linecolor=red,
 454    name=G]%
 455 \psset{fontsize=25,,pos=bc,plan=G}
 456 \psProjection[object=texte,
 457    phi=-90,
 458    text=le monologue de Molly,
 459    pos=bc,
 460    ](-5,0)
 461 \psProjection[object=texte,text=dans Ulysse de James Joyce](1,-5,0)
 462 \psset{h=1,fillcolor=yellow!50,incolor=rose,hollow}
 463 \psset{fontsize=20,pos=cc}
 464 %
 465 \psSolid[object=ruban,name=ruban1,base=9 8 9 -8]
 466 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 467 \psProjection[object=texte,plan=R0,
 468    text=O cet effrayant torrent tout au fond O et la mer \'{e}carlate]
 469 %
 470 \psSolid[object=ruban,name=ruban1,base=9 -8 -8 -8]
 471 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 472 \psProjection[object=texte,plan=R0,
 473    text=quelquefois comme du feu et les glorieux couchers de soleil et]
 474 %
 475 \psSolid[object=ruban,name=ruban1,base=-8 7 7 7]
 476 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 477 \psProjection[object=texte,plan=R0,fontsize=18,
 478    text=les ruelles bizarres les maisons roses et bleues et jaunes,]
 479 %
 480 \psSolid[object=ruban,name=ruban1,base=7 7 7 -6]
 481 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 482 \psProjection[object=texte,plan=R0,
 483    text=et les roseraies et les jasmins et les g\'{e}raniums,]
 484 %
 485 \psSolid[object=ruban,name=ruban1,base=7 -6 -6 -6]
 486 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 487 \psProjection[object=texte,plan=R0,
 488    text=et les cactus de Gibraltar quand j'\'{e}tais jeune fille,]
 489 %
 490 \psSolid[object=ruban,name=ruban1,base=-6 5 5 5]
 491 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 492 \psProjection[object=texte,plan=R0,fontsize=18,
 493    text=quand j'ai mis la rose dans mes cheveux,]
 494 %
 495 \psSolid[object=ruban,name=ruban1,base=5 5 5 -4]
 496 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 497 \psProjection[object=texte,plan=R0,
 498    text=comme les filles Andalouses,]
 499 %
 500 \psSolid[object=ruban,name=ruban1,base=5 -4 -3 -4]
 501 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 502 \psProjection[object=texte,plan=R0,
 503    text=ou en mettrai-je une rouge oui,]
 504 %
 505 \psSolid[object=ruban,name=ruban1,base=-3 4 3 4]
 506 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 507 \psProjection[object=texte,plan=R0,fontsize=18,
 508    text=sous le mur mauresque,]
 509 %
 510 \psSolid[object=ruban,name=ruban1,base=3 4 3 -2]
 511 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 512 \psProjection[object=texte,plan=R0,
 513    text=je me suis dit apr\`{e}s,]
 514 %
 515 \psSolid[object=ruban,name=ruban1,base=3 -2 -1.5 -2]
 516 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 517 \psProjection[object=texte,plan=R0,
 518    text=tout aussi bien,]
 519 %
 520 \psSolid[object=ruban,name=ruban1,base=-1.5 3 2 3]
 521 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 522 \psProjection[object=texte,plan=R0,
 523    text=et alors je,]
 524 \psSolid[object=ruban,name=ruban1,base=-8 -8 -8 7]
 525 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 526 \psProjection[object=texte,plan=R0,
 527    text=les figuiers dans les jardins de l'Alameda et toutes,]
 528 %
 529 \psSolid[object=ruban,name=ruban1,base=-6 -6 -6 5]
 530 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 531 \psProjection[object=texte,plan=R0,
 532    text=et une Fleur de la montagne oui,]
 533 %
 534 \psSolid[object=ruban,name=ruban1,base=-3 -4 -3 4]
 535 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 536 \psProjection[object=texte,plan=R0,
 537    text=et comme il m'a embrass\'{e}e,]
 538 %
 539 \psSolid[object=ruban,name=ruban1,base=-1.5 -2 -1.5 3]
 540 \psSolid[object=plan,action=none,definition=solidface,args=ruban1 0,name=R0,phi=-90]
 541 \psProjection[object=texte,plan=R0,
 542    text=lui qu'un autre,]
 543 %
 544 \composeSolid
 545 }
 546
 547 We project a poem, verse by verse, onto 4 faces of a cube. It is
 548 necessary to use the option \texttt{solidmemory} at the beginning
 549 \begin{verbatim}
 550 \psset{solidmemory}
 551 \psSolid[object=cube,a=8,name=A1](0,0,4.2)%
 552 \end{verbatim}
 553 of the code. We then define the cube, which is memorised with the
 554 help of the command \texttt{name=A}:
 555
 556 \begin{verbatim}
 557 \psset{solidmemory}
 558 \psProjection[object=texte,text=po\`{e}me,fontsize=30,plan=P0](0,3)%
 559 \psSolid[object=cube,a=8,name=A](0,0,4.2)%
 560 \end{verbatim}
 561
 562 The number of each face needs to be known---from a previous run
 563 of the code with the option \texttt{\Lkeyword{numfaces}=\Lkeyval{all}}. The following
 564 commands:
 565
 566
 567 \begin{verbatim}
 568 \psSolid[object=plan,action=none,definition=solidface,args=A 0,name=P0]%
 569 \psProjection[object=texte,text=po\`{e}me,fontsize=30,plan=P0](0,3)%
 570 \end{verbatim}
 571 define the plane $P0$ as the oriented plane of the face with index
 572 number 0 of the solid $A$, before the word \texttt{po\`{e}me} is
 573 projected onto $P0$, with a font size of 30~pts, to the point with
 574 coordinates $(0,3)$ (within the coordinate system of that plane).
 575 We could have changed the orientation of the text to
 576 \texttt{phi=-90} for example, in the one or other of the commands.
 577
 578 By default, if the face is not visible, its text stays hidden. By
 579 putting \Lkeyword{visibility} in the options, the text is shown when
 580 it would otherwise not be, as in the following example.
 581
 582 You must not forget to write \texttt{$\backslash$composeSolid} at
 583 the end of the text-writing commands for all these lines to be
 584 taken into account. Any other  PStricks command will have
 585 the usual effect and \verb+\composeSolid+ will be unnecessary.
 586
 587
 588
 589
 590 \begin{center}
 591 \psset{viewpoint=40 20 30 rtp2xyz,Decran=16}
 592 \JuangJie \hfil
 593 \psset{viewpoint=40 110 30 rtp2xyz,Decran=16}
 594 \JuangJie
 595 \end{center}
 596 \begin{center}
 597 \psset{viewpoint=40 200 30 rtp2xyz,Decran=16}
 598 \JuangJie\hfil
 599 \psset{viewpoint=40 290 30 rtp2xyz,Decran=16}
 600 \JuangJie
 601 \end{center}
 602
 603
 604 \begin{center}
 605 \begin{pspicture}(-8,-6)(8,3)
 606 \psset{lightsrc=-15 -9 5}
 607 \psframe(-8,-6)(8,3)
 608 \psset{viewpoint=20 -150 30 rtp2xyz,Decran=11}\MollyBloom
 609 \end{pspicture}
 610 \end{center}
 611 \begin{center}
 612 \begin{pspicture}(-8,-6)(8,7)
 613 \psset{lightsrc=0 0 3}
 614 \psframe(-8,-6)(8,7)
 615 \psset{viewpoint=6 -150 89.9 rtp2xyz,Decran=2.8}\MollyBloom
 616 \end{pspicture}
 617 \end{center}
 618
 619 \endinput