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vrml_demo_tutorial_3.m

## Copyright (C) 2002 Etienne Grossmann.  All rights reserved.
##
## 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 2, or (at your option) any
## later version.
##
## This 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.
##

## Author : Etienne Grossmann <etienne@isr.ist.utl.pt>

printf (["\n",\
       "     VRML Mini-HOWTO's second listing\n",\
       "     Show a XYZ frame with a background\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",\
       "      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 3

s1 = vrml_frame ("scale",[1 2 3],"col",eye (3), "hcol",0.5*[1 1 1]);

## One possible variant that uses a two-color sky. I don't refer to it in
## the tutorial because I am not sure that freewrl behaves correctly with
## background nodes.

## s2 = vrml_Background ("skyColor",[3 3 9; 9 9 9]'/10,"groundColor",[3 8 3]/10);
s2 = vrml_Background ("skyColor",[3 3 9]/10,"groundColor",[3 8 3]/10);

vrml_browse ([s1,s2]);







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