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## Copyright (C) 2002-2009 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/>.
printf (["\n",...
" VRML Mini-HOWTO's second listing\n",...
" Show a helix of ellipsoids and one consisting of cylinders\n\n"]);
printf ([" Reminder of FreeWRL keystrokes and mouse actions :\n"...
" q : quit\n",...
" w : switch to walk mode\n",...
" e : switch to examine mode\n",...
" h : toggle headlights on or off\n",...
" drag left mouse : rotate (examine mode) or translate\n",...
" (walk mode).\n",...
" drag right mouse : zoom (examine mode) or translate\n",...
" (walk mode).\n",...
"\n"]);
## Listing 4
x = linspace (0,4*pi,50);
# Points on a helix
xx1 = [x/6; sin(x); cos(x)];
# Linked by segments
s1 = vrml_cyl (xx1, "col",kron (ones (3,25),[0.7 0.3]));
# Scaled and represented by spheres
s2 = vrml_points (xx1,"balls");
s2 = vrml_transfo (s2,nan,[pi/2,0,0],[1 0.5 0.5]);
s3 = vrml_Background ("skyColor",[0 0 1]);
vrml_browse ([s1, s2, s3]);