diff options
| -rw-r--r-- | profile.c | 15 |
1 files changed, 11 insertions, 4 deletions
@@ -300,7 +300,7 @@ static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi) { - int maxtime, mintemp, maxtemp; + int maxtime, mintemp, maxtemp, delta; /* Get plot scaling limits */ maxtime = get_maxtime(pi); @@ -308,9 +308,16 @@ static int setup_temperature_limits(struct graphics_context *gc, struct plot_inf maxtemp = pi->maxtemp; gc->leftx = 0; gc->rightx = maxtime; - /* Show temperatures in roughly the lower third */ - gc->topy = maxtemp + (maxtemp - mintemp)*2; - gc->bottomy = mintemp - (maxtemp - mintemp)/2; + /* Show temperatures in roughly the lower third, but make sure the scale + is at least somewhat reasonable */ + delta = maxtemp - mintemp; + if (delta > 3000) { /* more than 3K in fluctuation */ + gc->topy = maxtemp + delta*2; + gc->bottomy = mintemp - delta/2; + } else { + gc->topy = maxtemp + 1500 + delta*2; + gc->bottomy = mintemp - delta/2; + } return maxtemp > mintemp; } |