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Add Euler 1 dim step option to shortcuts.py #277

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Add Euler 1 dim step option to shortcuts.py #277

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17 changes: 17 additions & 0 deletions grudge/shortcuts.py
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Original file line number Diff line number Diff line change
Expand Up @@ -23,6 +23,23 @@

from pytools import memoize_in

def euler_step(y, t, h, f):
return y + h*f(t, y)

def _euler_update(y, h, rhs_val):
return y + h*rhs_val


def compiled_euler_step(actx, y, t, h, f):
@memoize_in(actx, (compiled_euler_step, "update"))
def get_state_updater():
return actx.compile(_euler_update)

update = get_state_updater()

rhs_val = f(t, y)
y = update(y, h, rhs_val)
return y

def rk4_step(y, t, h, f):
k1 = f(t, y)
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