Fix steering arc artifacts (#36707)

* fix arc artifacts

* works but how

* also this

* Revert "also this"

This reverts commit e8d5ed9.

* clean up

* nl

* clean up

* more

* print

* print

Author: sshane

selfdrive/ui/mici/onroad/torque_bar.py

@@ -130,6 +130,9 @@ def get_cap(left: bool, a_deg: float):
 
   pts = np.vstack((outer, cap_end, inner, cap_start, outer[:1])).astype(np.float32)
 
+  # Rotate to start from middle of cap for proper triangulation
+  pts = np.roll(pts, cap_segs, axis=0)
+
   if DEBUG:
     n = len(pts)
     idx = int(time.monotonic() * 12) % max(1, n)  # speed: 12 pts/sec