import time
import krpc

conn = krpc.connect(name='Orbital speed')
if not conn.space_center:
    print("No active vessel found.")
    exit()
vessel = conn.space_center.active_vessel
hybrid_ref = conn.space_center.ReferenceFrame.create_hybrid(
    position=vessel.orbit.body.reference_frame,
    rotation=vessel.surface_reference_frame
) # type: ignore
# 参考系为 (上, 北, 东)

flight_surface = vessel.flight(hybrid_ref)

drawing = conn.drawing
if not drawing:
    print("Drawing service not available.")
    exit()
drawing.add_direction_from_com((1, 0, 0), hybrid_ref, length=15)
drawing.add_direction_from_com((0, 1, 0), hybrid_ref, length=30)
drawing.add_direction_from_com((0, 0, 1), hybrid_ref, length=45)
while True:
    pass