Hello, sorry to ask so many questions... I am trying to get plplot to rewrite
the plot to the same file several times (part of my quest to write to a pipe
into ffmpeg). In between plots (plbop().....pleop()) I delete the file
(before I delete the file I send it into another ofstream that will pipe it
into ffmpeg), and I expected plplot to recreate the file for the next plot so
I can do it all over again. In the documentation is says that if using
plbop(): "For a file driver, the output file is opened if necessary."
I'm now using the Debian Sid plplot, since I had segfault problems with the
JPG-driver in the current SVN-version. I tried to reset the filename with
plsfnam() between the plots, using the same string as when running it before
plinit(), but then I get a segfault.
I have included a test program below. The part about piping the file into an
ofstream is not in this test program, but that has nothing to do with the
behaviour I'm discussing. I thought that a "1.jpg" would exist after the
program exits, but that is not the case. The file only exists until I delete
it in the program, it is not recreated at the next plbop():
Best regards,
Torquil Sørensen
#include <plplot/plplot.h>
#include <cstdio>
using namespace std;
int main(int argc, char *argv[]) {
double x[] = { 0.1, 0.5, 0.2, 0.4, 0.4 };
double y[] = { 0.5, 0.4, 0.4, 0.8, 0.9 };
plparseopts(&argc, argv, PL_PARSE_FULL);
plsfnam("1.jpg");
plsdev("jpeg");
plinit();
plenv(0, 1, 0, 1, 1, -2);
plbop();
plbox("bcinst", 0, 0, "bcinst", 0, 0);
plline(5, x, y);
pleop();
system("ls -l 1.jpg");
remove("1.jpg");
plbop();
plbox("bcinst", 0, 0, "bcinst", 0, 0);
plline(5, x, y);
pleop();
plend();
return(0);
}
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