from orbiter.orbits.body import Body
from orbiter.orbits.simulator import Simulator
from orbiter.units import *

from pathlib import Path
from decimal import Decimal, getcontext

getcontext().prec = 100

#set up the earth
earth = Body(
    Position([0,0,0]), 
    Velocity([0,0,0]), 
    Mass(norm_mass(EARTH_MASS)),
    "Earth"
)

#Lets try a body just outside earth accelerating in. Should be 9.8m/s2
person = Body(
    Position([norm_pos(EARTH_RADIUS+100_000),0,0]), #10_000m in the sky, airliner height!
    Velocity([0,0,0]), #start from standstill
    Mass(norm_mass(80)), #avg person
    "Person"
)

time_to_run = norm_time(5)
STEP_SIZE = Decimal(1e-10)
n_steps = time_to_run/STEP_SIZE

s = Simulator([earth,person], STEP_SIZE, 1, Path("hello_world"))
s.run(10)

print(real_vel(person.V))