Xournal Patch that Prevents Pen Streaks on a Surface 3

xournal.patch

diff -x .git -Naur xournal/src/xo-paint.c xournal_b/src/xo-paint.c
--- xournal/src/xo-paint.c	2017-01-12 16:59:15.343353729 -0600
+++ xournal_b/src/xo-paint.c	2017-01-12 16:57:55.733350742 -0600
@@ -277,6 +277,8 @@
   else {
     if (hypot(pt[0]-pt[2], pt[1]-pt[3]) < PIXEL_MOTION_THRESHOLD/ui.zoom)
       return;  // not a meaningful motion
+    if (hypot(pt[0]-pt[2], pt[1]-pt[3]) > 100)
+      return;  // not a meaningful motion
     ui.cur_path.num_points++;
   }