Add a useful package (from Source forge) for octave

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

diff --git a/octave_packages/vrml-1.0.13/vrml_lines.m b/octave_packages/vrml-1.0.13/vrml_lines.m
new file mode 100644 (file)
index 0000000..7e6dcee
--- /dev/null
+++ b/octave_packages/vrml-1.0.13/vrml_lines.m
@@ -0,0 +1,94 @@
+## 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/>.
+
+## s = vrml_lines(x,f,...)
+##
+## x : 3xP   : The 3D points
+## f : 3xQ   : The indexes of the points forming the lines. Indexes
+##             should be in 1:P.
+##
+## Returns a Shape -> IndexedLineSet vrml node.
+##
+## No check is done on anything
+##
+## Options :
+## 
+## "col" , col  : 3x1 : Color, default = [1,0,0]
+
+function s = vrml_lines(x,f,varargin)
+
+if nargin < 2, f = ones (1,columns(x)); end
+col = [1, 0, 0] ;
+
+opt1 = " col " ;
+opt0 = " " ;
+
+verbose = 0 ;
+
+i=1;
+
+while (nargin -2) >=i ,
+
+  tmp = varargin{i++} ;        # pos 2.1.39
+  if ! ischar(tmp) ,
+    error ("vrml_lines : Non-string option : \n") ;
+    ## keyboard
+
+  end
+  if index(opt1,[" ",tmp," "]) ,
+    
+
+    tmp2 = varargin{i++}; # pos 2.1.39
+    ## args-- ;
+    eval([tmp,"=tmp2;"]) ;
+
+    if verbose , printf ("vrml_lines : Read option : %s.\n",tmp); end
+
+  elseif index(opt0,[" ",tmp," "]) ,
+    
+    eval([tmp,"=1;"]) ;
+    if verbose , printf ("vrml_lines : Read boolean option : %s\n",tmp); end
+
+  else
+    error ("vrml_lines : Unknown option : %s\n",tmp) ;
+    ## keyboard
+  end
+endwhile
+
+if exist("col")!=1,  col = [0.5, 0.5, 0.8]; end
+
+s = sprintf([...                       # string of indexed face set
+            "Shape {\n",...
+            "  appearance Appearance {\n",...
+            "    material Material {\n",...
+            "      diffuseColor %8.3f %8.3f %8.3f \n",...
+            "      emissiveColor %8.3f %8.3f %8.3f\n",...
+            "    }\n",...
+            "  }\n",...
+            "  geometry IndexedLineSet {\n",...
+            "    coordIndex [\n%s]\n",...
+            "    coord Coordinate {\n",...
+            "      point [\n%s]\n",...
+            "    }\n",...
+            "  }\n",...
+            "}\n",...
+            ],...
+           col,col,...
+           sprintf("                    %4d, %4d, %4d, -1,\n",f-1),...
+           sprintf("                 %8.3f %8.3f %8.3f,\n",x)) ;
+
+
+endfunction
+