There is problem when I run “./linedrawing_project.sh -d data/ -p teddy.off”.
I unzip the package trianglemesh, and run below :
**input:**
 `./linedrawing_project.sh -d data/ -p teddy.off`
there are some problems apper,  how to fix it?
**gives:**
```
QXcbConnection: Failed to initialize XRandr
Qt: XKEYBOARD extension not present on the X server.
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
```

