--- /dev/null
+## 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/>.
+
+## p = vrml_browse ([s]) - View vrml code s with FreeWRL
+## vrml_browse ("-kill") - Kill the browser
+##
+## s : string : VRML code, as returned by the vrml_XYZ functions.
+## If s is not specified, a sombrero is showed
+##
+## p : int : pid of the current browser. If freewrl has not been started
+## or has died, a new one is started. p is zero or negative in
+## case of failure to start freewrl.
+##
+## Some keystrokes for FreeWRL (more in the freewrl manpage) :
+##
+## 'e' : Examine : mouse 1 and drag rotates the scene
+## mouse 3 and drag moves closer/farther
+## 'w' : Walk : mouse 1 and drag moves for/backward, turns
+## mouse 3 and drag translates parallel to the screen
+## 's' : Save a snapshot in files 'octave.snapshot.NNNN.ppm'
+## 'q' : Quit
+##
+## WARNING : FreeWRL >0.25 (http://www.crc.ca/FreeWRL/) must be installed.
+##
+## BUG : The vrml browser is not killed when octave exits. Sometimes the
+## vrml browser does not get raised or gets raised improperly
+## (shows the contents of the topmost window above it). Use
+## "-kill".
+
+function p = vrml_browse (varargin)
+
+verbose = 0;
+
+best_option = " ";
+ # Allow scripting and specify where
+ # browser's output goes
+##out_option = "--ps --psout /tmp/octave_browser_out.txt " ;
+out_option = " " ;
+geo_option = " " ;
+global vrml_b_pid = 0;
+global vrml_b_name = [];
+
+p = vrml_b_pid ;
+bop = "";
+go_to_bg = 0;
+
+if nargin<1
+ s = "";
+else
+ i = 1;
+ while i <= length (varargin)
+ o = varargin{i++};
+ if strcmp (o, "-kill")
+ vrml_kill(); return;
+ elseif strcmp (o, "-bop") # Browser options
+ bop = [bop," ",varargin{i++}," "];
+ elseif strcmp (o, "-bg") # Browser options
+ go_to_bg = 1;
+ elseif strcmp (o, "-geometry") # Browser options
+ geo_option = varargin{i++};
+ if !ischar (geo_option)
+ assert (length (geo_option) == 2)
+ geo_option = sprintf ("--geometry %ix%i",geo_option);
+ else
+ geo_option = sprintf ("--geometry %s",geo_option);
+ end
+ end
+ end
+ s = varargin{length (varargin)};
+end
+
+if ! index (s, "Background")
+ s = [s, vrml_Background("skyColor",[.7 .7 .9])];
+end
+
+
+vrml_b_name = "whitedune" ;
+##vrml_b_name = "/home/etienne/bin/my_freewrl.sh";
+
+##b_opt = [out_option," ",bop," ",best_option," --server --snapb octave.snap "]
+##;
+##b_opt = [out_option," ",bop," ",best_option," --server "] ;
+##b_opt = [out_option," ",bop," ",best_option," --snapb octave_freewrl_snapshots "] ;
+b_opt = [out_option," ",bop," ",best_option, " ",geo_option] ;
+
+
+b_temp = "/tmp/octave_vrml_output.wrl" ;
+b_log = " &> /tmp/octave_vrml_browser.log";
+
+new_browser = 0 ;
+ # ####################################
+if vrml_b_pid > 0 # There's already a browser ##########
+
+ # Check that browser is really alive
+
+ [status, dum] = system (sprintf ("kill -CONT %d &> /dev/null",vrml_b_pid));
+
+ if ! status
+ if verbose
+ printf ( "vrml_browse : browser pid=%d is still alive\n",vrml_b_pid);
+ end
+ else
+ if verbose
+ printf ( ["vrml_browse : ",\
+ "browser pid=%d died. I'll spawn another\n"], vrml_b_pid);
+ end
+ vrml_b_pid = -1 ;
+ end
+end # End of check if old browser's alive
+ # ####################################
+
+ # ####################################
+ # Check that temp file exists ########
+[status, dum] = system (["test -e ",b_temp]);
+if !length (s)
+
+ if verbose
+ printf( "vrml_browse : Trying to create temp file\n");
+ end
+ # Do a sombrero
+ n = 30 ;
+ x = y = linspace (-8, 8, n)';
+ [xx, yy] = meshgrid (x, y);
+ r = sqrt (xx .^ 2 + yy .^ 2) + eps;
+ z = 3*sin (r) ./ (2*r);
+ x /= 4 ; y /= 4 ;
+
+ ## pix = ones (n) ;
+ ## tmp = [1 0 0 1 1 1 0 0 1 1 0 0 0 0 0 1 1 0 0 1 1 1 0 1 0 1 1 0 0 0 ;\
+ ## 0 1 1 0 1 0 1 1 0 1 1 1 0 1 1 1 0 1 1 0 1 1 0 1 0 1 1 0 1 1 ;\
+ ## 0 1 1 0 1 0 1 1 1 1 1 1 0 1 1 1 0 1 1 0 1 1 0 1 0 1 1 0 0 0 ;\
+ ## 0 1 1 0 1 0 1 1 0 1 1 1 0 1 1 1 0 0 0 0 1 1 0 1 0 1 1 0 1 1 ;\
+ ## 1 0 0 1 1 1 0 0 1 1 1 1 0 1 1 1 0 1 1 0 1 1 1 0 1 1 1 0 0 0 ];
+
+ ## rtmp = rows(tmp)+2;
+ ## for i=1:rtmp:n-rtmp,
+ ## pix(i+[1:rows(tmp)],1:columns(tmp)) = tmp ;
+ ## end
+ ## pix = flipud (pix);
+ ## col = [1;1;1]*pix(:)' ;
+ ## keyboard
+ rmat = [0.90000 -0.38730 0.20000;
+ 0.38730 0.50000 -0.77460;
+ 0.20000 0.77460 0.60000];
+ ## s = vrml_points ([x(:),y(:),z(:)],"balls");
+ ## s = vrml_transfo (vrml_thick_surf (x,y,z, "col",col), [0.25,0,0],rmat);
+ s = vrml_transfo (vrml_thick_surf (x,y,z), [0.25,0,0],rmat );
+end
+
+
+save_vrml (b_temp, s); # "nobg", s) ;
+ # End of preparing temp file #########
+ # ####################################
+
+ # ####################################
+ # Eventually start browser ###########
+if vrml_b_pid <= 0
+ new_browser = 1 ;
+ if verbose,
+ printf( "vrml_browse : spawning browser ...\n");
+ end
+ ## keyboard
+ # Starting a background browser :
+ #
+ # popen2 seems broken.
+ # popen had some problem, can't recall what
+ # system "async" does not give me pid of
+ # browser, but pid of shell
+ # system "sync" only returns when child
+ # process has exited
+ #
+ # So my solution is : "system" a process that
+ # forks. Its child is a browser. The parent
+ # prints the child's pid (given by fork())
+ # and exits. Octave reads the output of the
+ # system call, which is the browser's pid.
+ # Phew!
+ if 1
+ cmd = [vrml_b_name," ",b_opt," ",b_temp," "]
+## [status, out] = system (cmd = [vrml_b_name," ",b_opt," \"file:",b_temp,"\""], 1);
+ [status, out] = system (cmd = [vrml_b_name," ",b_opt," ",b_temp], 1);
+ ## cmd
+ if status,
+
+ printf("vrml_browse : Can't start browser '%s'. Is it installed?\n",\
+ vrml_b_name);
+ p = vrml_b_pid ;
+ return ;
+ else
+
+ vrml_b_pid = -1;
+ server_works = 0;
+ end
+ if server_works
+ vrml_b_pid = str2num (out);
+ end
+
+ if verbose, printf( "vrml_browse : OK\n"); end
+ end
+
+end # End of starting new browser ########
+ # ####################################
+
+if (!new_browser) && (vrml_b_pid > 1)
+ # ####################################
+ # Send USR1 signal to browser to tell it to
+ # raise itself.
+ [status, dum] = system (sprintf ("kill -USR1 %d &> /dev/null",vrml_b_pid));
+
+ if status,
+ printf ("vrml_browse : browser pid=%d can't be signaled\n",vrml_b_pid);
+ else
+ if verbose,
+ printf( ["vrml_browse : USR1 sent to browser pid=%d\n"], vrml_b_pid);
+ end
+ end
+end # End of signaling browser ##########
+ # ####################################
+
+p = vrml_b_pid ;
+endfunction
+
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff