/usr/share/octave/packages/vrml-1.0.13/test_moving_surf.m is in octave-vrml 1.0.13-2.
This file is owned by root:root, with mode 0o644.
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##
## 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/>.
###key test_moving_surf
##
## Test vmesh.m
R = 15;
C = 23;
[x,y] = meshgrid (linspace (-1,1,C), linspace (-1,1,R));
z = (cos (x*2*pi) + 2*y.^2)/3;
z2 = (2*cos (x*2*pi) + y.^2)/3;
a = [x(:),y(:),z(:)]';
b = [x(:),y(:),z2(:)]';
printf ("\ntest_changing_surf \n");
if 1
printf (" - display a moving surface\n");
s1 = vrml_surf (z,"DEFcoord","foo");
s2 = vrml_anim ("Coordinate",[a,b,a],"foo.set_point",[0 0.5 1],5);
s3 = vrml_faces ([-1 -1 1 1;-1 1 1 -1;0.1 0.1 0.1 0.1], {[1 2 3 4]}, "tran",0.4,"col",[0.3 0.9 0.4]);
vrml_browse ([s1,s2,s3])
printf ("Press a key. \n"); pause ();
end
if 1
printf (" - display a moving surface w/ changing color\n");
c0 = rem ([1:R-1]'*ones(1,C-1) + ones(R-1,1)*[1:C-1],2)(:);
c1 = [0.8*c0 ,(1-c0)*0.8, 0.3*ones((R-1)*(C-1),1)]';
c2 = [0.3*ones((R-1)*(C-1),1), c0*0.8, 0.8*(1-c0)]';
c1 = [3 9 3]'/10;
c2 = [3 3 9]'/10;
s1 = vrml_surf (z,"DEFcol","bar","col",c1,"DEFcoord","foo");
[s2,tn] = vrml_anim ("Color",[c1,c2,c1],"bar.set_diffuseColor",[0 0.5 1],5);
s4 = vrml_anim ("Coordinate",[a,b,a],"foo.set_point",[0 0.5 1],tn);
s3 = vrml_faces ([-1 -1 1 1;-1 1 1 -1;0.1 0.1 0.1 0.1],\
{[1 2 3 4]},"tran",0.4,"col",[0.9 0.4 0.4]);
vrml_browse ([s1,s2,s3,s4])
printf ("Press a key. \n"); pause ();
end
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