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Commit bbd8d348 authored by Martin Bauer's avatar Martin Bauer
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Worked on PackInfo generation & general walberla bridge

parent 35e7428f
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field.py
View file @ bbd8d348
......@@ -7,6 +7,7 @@ from sympy.core.cache import cacheit
from sympy.tensor import IndexedBase
from pystencils.alignedarray import aligned_empty
from pystencils.data_types import TypedSymbol, create_type, create_composite_type_from_string, StructType
from pystencils.stencils import offset_to_direction_string, direction_string_to_offset
from pystencils.sympyextensions import is_integer_sequence
__all__ = ['Field', 'fields', 'FieldType']
......@@ -735,107 +736,6 @@ def compute_strides(shape, layout):
return tuple(strides)
def offset_component_to_direction_string(coordinate_id: int, value: int) -> str:
"""Translates numerical offset to string notation.
x offsets are labeled with east 'E' and 'W',
y offsets with north 'N' and 'S' and
z offsets with top 'T' and bottom 'B'
If the absolute value of the offset is bigger than 1, this number is prefixed.
Args:
coordinate_id: integer 0, 1 or 2 standing for x,y and z
value: integer offset
Examples:
>>> offset_component_to_direction_string(0, 1)
'E'
>>> offset_component_to_direction_string(1, 2)
'2N'
"""
assert 0 <= coordinate_id < 3, "Works only for at most 3D arrays"
name_components = (('W', 'E'), # west, east
('S', 'N'), # south, north
('B', 'T')) # bottom, top
if value == 0:
result = ""
elif value < 0:
result = name_components[coordinate_id][0]
else:
result = name_components[coordinate_id][1]
if abs(value) > 1:
result = "%d%s" % (abs(value), result)
return result
def offset_to_direction_string(offsets: Sequence[int]) -> str:
"""
Translates numerical offset to string notation.
For details see :func:`offset_component_to_direction_string`
Args:
offsets: 3-tuple with x,y,z offset
Examples:
>>> offset_to_direction_string([1, -1, 0])
'SE'
>>> offset_to_direction_string(([-3, 0, -2]))
'2B3W'
"""
if len(offsets) > 3:
return str(offsets)
names = ["", "", ""]
for i in range(len(offsets)):
names[i] = offset_component_to_direction_string(i, offsets[i])
name = "".join(reversed(names))
if name == "":
name = "C"
return name
def direction_string_to_offset(direction: str, dim: int = 3):
"""
Reverse mapping of :func:`offset_to_direction_string`
Args:
direction: string representation of offset
dim: dimension of offset, i.e the length of the returned list
Examples:
>>> direction_string_to_offset('NW', dim=3)
array([-1, 1, 0])
>>> direction_string_to_offset('NW', dim=2)
array([-1, 1])
>>> direction_string_to_offset(offset_to_direction_string((3,-2,1)))
array([ 3, -2, 1])
"""
offset_dict = {
'C': np.array([0, 0, 0]),
'W': np.array([-1, 0, 0]),
'E': np.array([1, 0, 0]),
'S': np.array([0, -1, 0]),
'N': np.array([0, 1, 0]),
'B': np.array([0, 0, -1]),
'T': np.array([0, 0, 1]),
}
offset = np.array([0, 0, 0])
while len(direction) > 0:
factor = 1
first_non_digit = 0
while direction[first_non_digit].isdigit():
first_non_digit += 1
if first_non_digit > 0:
factor = int(direction[:first_non_digit])
direction = direction[first_non_digit:]
cur_offset = offset_dict[direction[0]]
offset += factor * cur_offset
direction = direction[1:]
return offset[:dim]
def _parse_type_description(type_description):
if not type_description:
return np.float64, None
......
stencils.py
View file @ bbd8d348
from typing import Sequence
import numpy as np
import sympy as sp
from collections import defaultdict
from pystencils import Field
def inverse_direction(direction):
......@@ -61,6 +62,7 @@ def stencil_coefficient_dict(expr):
>>> sorted(coeffs.items())
[((-1, 0), 3), ((0, 1), 2)]
"""
from .field import Field
expr = expr.expand()
field_accesses = expr.atoms(Field.Access)
fields = set(fa.field for fa in field_accesses)
......@@ -147,6 +149,113 @@ def stencil_coefficient_list(expr, matrix_form=False):
raise ValueError("Can only handle fields with 1,2 or 3 spatial dimensions")
def inverse_direction(direction):
return type(direction)(-e for e in direction)
# ------------------------------------- Point-on-compass notation ------------------------------------------------------
def offset_component_to_direction_string(coordinate_id: int, value: int) -> str:
"""Translates numerical offset to string notation.
x offsets are labeled with east 'E' and 'W',
y offsets with north 'N' and 'S' and
z offsets with top 'T' and bottom 'B'
If the absolute value of the offset is bigger than 1, this number is prefixed.
Args:
coordinate_id: integer 0, 1 or 2 standing for x,y and z
value: integer offset
Examples:
>>> offset_component_to_direction_string(0, 1)
'E'
>>> offset_component_to_direction_string(1, 2)
'2N'
"""
assert 0 <= coordinate_id < 3, "Works only for at most 3D arrays"
name_components = (('W', 'E'), # west, east
('S', 'N'), # south, north
('B', 'T')) # bottom, top
if value == 0:
result = ""
elif value < 0:
result = name_components[coordinate_id][0]
else:
result = name_components[coordinate_id][1]
if abs(value) > 1:
result = "%d%s" % (abs(value), result)
return result
def offset_to_direction_string(offsets: Sequence[int]) -> str:
"""
Translates numerical offset to string notation.
For details see :func:`offset_component_to_direction_string`
Args:
offsets: 3-tuple with x,y,z offset
Examples:
>>> offset_to_direction_string([1, -1, 0])
'SE'
>>> offset_to_direction_string(([-3, 0, -2]))
'2B3W'
"""
if len(offsets) > 3:
return str(offsets)
names = ["", "", ""]
for i in range(len(offsets)):
names[i] = offset_component_to_direction_string(i, offsets[i])
name = "".join(reversed(names))
if name == "":
name = "C"
return name
def direction_string_to_offset(direction: str, dim: int = 3):
"""
Reverse mapping of :func:`offset_to_direction_string`
Args:
direction: string representation of offset
dim: dimension of offset, i.e the length of the returned list
Examples:
>>> direction_string_to_offset('NW', dim=3)
array([-1, 1, 0])
>>> direction_string_to_offset('NW', dim=2)
array([-1, 1])
>>> direction_string_to_offset(offset_to_direction_string((3,-2,1)))
array([ 3, -2, 1])
"""
offset_dict = {
'C': np.array([0, 0, 0]),
'W': np.array([-1, 0, 0]),
'E': np.array([1, 0, 0]),
'S': np.array([0, -1, 0]),
'N': np.array([0, 1, 0]),
'B': np.array([0, 0, -1]),
'T': np.array([0, 0, 1]),
}
offset = np.array([0, 0, 0])
while len(direction) > 0:
factor = 1
first_non_digit = 0
while direction[first_non_digit].isdigit():
first_non_digit += 1
if first_non_digit > 0:
factor = int(direction[:first_non_digit])
direction = direction[first_non_digit:]
cur_offset = offset_dict[direction[0]]
offset += factor * cur_offset
direction = direction[1:]
return offset[:dim]
# -------------------------------------- Visualization -----------------------------------------------------------------
......
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