Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / vrml-1.0.13 / test_vrml_faces.m

diff --git a/octave_packages/vrml-1.0.13/test_vrml_faces.m b/octave_packages/vrml-1.0.13/test_vrml_faces.m
new file mode 100644 (file)
index 0000000..b45e015
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+++ b/octave_packages/vrml-1.0.13/test_vrml_faces.m
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+## Copyright (C) 2002 Etienne Grossmann <etienne@egdn.net>
+##
+## This program is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free Software
+## Foundation; either version 3 of the License, or (at your option) any later
+## version.
+##
+## This program is distributed in the hope that it will be useful, 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.
+##
+## You should have received a copy of the GNU General Public License along with
+## this program; if not, see <http://www.gnu.org/licenses/>.
+
+## Test that vrml_faces works with "tex" option
+
+1;
+
+## Tetrahedron : Vertices
+x = [ 1  1 -1  0;
+     -1  1  0  0;
+     -1 -1 -1  1];
+
+## Tetrahedron : Faces
+trg = [1 2 3 1;
+       2 3 1 2;
+       4 4 4 3];
+
+trgl = {[1 2 4],[2 3 4],[3 1 4],[1 2 3]};
+
+slight = vrml_PointLight ("location", [0,5,0]);
+
+if 1
+  s1 = vrml_faces (x, trg);
+
+  printf ("Going to show a tetrahedron\n");
+
+  printf (["\n     If nothing appears, it may be due to problems",\
+          "\n     with your FreeWRL installation\n"]);
+  vrml_browse ([slight, s1]);
+  printf ("Press a key in this terminal when done\n");pause;
+end
+
+if 1
+  s1 = vrml_faces (x, trgl,"col",[1,0.5,0.5]);
+
+  printf ("Going to show almost the same tetrahedron\n");
+
+  printf (["\n     If nothing appears, it may be due to problems",\
+          "\n     with your FreeWRL installation\n"]);
+  vrml_browse ([slight, s1]);
+  printf ("Press a key in this terminal when done\n");pause;
+end
+
+if 1
+  s1 = vrml_faces (x, trg, "col",[1 0 0 1;0 1 0 1;0 0 1 1]);
+
+  printf ("Coloring the vertices\n");
+  vrml_browse ([slight, s1]);
+  printf ("Press a key in this terminal when done\n");pause;
+end
+if 1
+  s1 = vrml_faces (x, trg, "col",[1 0 0 1;0 1 0 1;0 0 1 1],"colorPerVertex",0);
+
+  printf ("Coloring the faces\n");
+  vrml_browse ([slight, s1]);
+  printf ("Press a key in this terminal when done\n");pause;
+end
+
+## Texture :
+H = 50;
+W = 100;                       # Texture width
+w = floor (W/2);
+h = floor (H/2);
+tr = tg = tb = zeros (H,W+1);
+[j,i] = meshgrid (1:W+1,1:H);
+
+tr(find (i<=h & i*W>=j*H       )) = 1;
+tg(find (i> h & i*W>=(j+w)*H     )) = 1;
+tb(find (i> h & i*W>=j*H     & j> w)) = 1;
+
+
+if 0
+
+  if 1
+    whiten = find(!(tr | tg | tb));
+    tr(whiten) = 1;
+    tg(whiten) = 1;
+    tb(whiten) = 1;
+  end
+  
+  t0 = reshape (255*[tr;tg;tb], H,(W+1)*3);
+  t0 = t0 + 0.75 * rot90 (t0,2);
+  t0 = [t0, 0.5*t0];
+  tex = mat2ims (t0,1);
+
+## ims_show (tex);
+
+
+  texfile = [pwd(),"/mytexfile.ppm"];
+  ims_save (tex, texfile);
+
+  s1 = vrml_faces (x, trg, "tex",texfile,"imsz",[H,W]);
+  s2 = vrml_faces (x, trg, "tex",texfile);
+
+  printf (["Tetrahedrons should appear like (R=red, G=green, B=blue)\n\n",\
+          "              R 2\n",\
+          "               /\n",\
+          "              / G\n",\
+          "     G     B /\n",\
+          "   3--------4 B\n",\
+          "     R     B \\\n",\
+          "              \\ R\n",\
+          "             G \\\n",\
+          "                 1\n"]);
+  
+  vrml_browse ([slight, s1, vrml_transfo(s2,[2,0,0])]);
+end
+
+
+
+
+
+