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from __future__ import annotations
from typing import TYPE_CHECKING
import numpy as np
import pytest
from contourpy import (
FillType,
LineType,
contour_generator,
convert_filled,
convert_lines,
convert_multi_filled,
convert_multi_lines,
dechunk_filled,
dechunk_lines,
)
from . import util_test
if TYPE_CHECKING:
import contourpy._contourpy as cpy
@pytest.fixture
def z() -> cpy.CoordinateArray:
# Care needed with test data as although arbitrary z produces identical results for lines
# regardless of line_type, this is not the case for filled as the order that polygons are
# produced is different depending on whether the relationship between outer and inner
# boundaries is calculated. If it is then inner boundaries directly follow their outer boundary,
# if not then the boundaries are returned in the order they are found.
# This test data is chosen so that filled results are always the same.
return np.array([
[1, 0, 0, 0, 0, 0, 0],
[0, 0, 2, 0, 0, 0, 0],
[0, 2, 0, 0, 0, 0, 0],
[0, 1, 1, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 1],
[0, 2, 2, 0, 0, 0, 0],
[0, 0, 0, 0, 1, 0, 1],
], dtype=np.float64)
@pytest.mark.parametrize("fill_type_to", FillType.__members__.values())
@pytest.mark.parametrize("fill_type_from", FillType.__members__.values())
@pytest.mark.parametrize("chunk_size", (0, 2, 3))
@pytest.mark.parametrize("empty", (False, True))
def test_convert_filled(
z: cpy.CoordinateArray,
fill_type_from: FillType,
fill_type_to: FillType,
chunk_size: int,
empty: bool,
) -> None:
if empty:
# Levels outside of z bounds so no polygons produced.
lower_level, upper_level = 3.0, 4.0
else:
# Using chunk_size=2 or 3 there is an empty chunk.
lower_level, upper_level = 0.5, 1.5
filled = contour_generator(z=z, fill_type=fill_type_from, chunk_size=chunk_size).filled(
lower_level, upper_level)
if (fill_type_from in (FillType.ChunkCombinedCode, FillType.ChunkCombinedOffset) and
fill_type_to not in (FillType.ChunkCombinedCode, FillType.ChunkCombinedOffset)):
msg = f"Conversion from {fill_type_from} to {fill_type_to} not supported"
with pytest.raises(ValueError, match=msg):
convert_filled(filled, fill_type_from, fill_type_to)
else:
converted = convert_filled(filled, fill_type_from, fill_type_to)
util_test.assert_filled(converted, fill_type_to)
compare = contour_generator(z=z, fill_type=fill_type_to, chunk_size=chunk_size).filled(
lower_level, upper_level)
# Converting OuterCode or OuterOffset to any ChunkCombined* returns all polygons in a single
# chunk, so need to compare to dechunked_filled(compare).
if (fill_type_from in (FillType.OuterCode, FillType.OuterOffset) and
fill_type_to not in (FillType.OuterCode, FillType.OuterOffset)):
compare = dechunk_filled(compare, fill_type_to)
util_test.assert_equal_recursive(converted, compare)
@pytest.mark.parametrize("line_type_to", LineType.__members__.values())
@pytest.mark.parametrize("line_type_from", LineType.__members__.values())
@pytest.mark.parametrize("chunk_size", (0, 2, 3))
@pytest.mark.parametrize("empty", (False, True))
def test_convert_lines(
z: cpy.CoordinateArray,
line_type_from: LineType,
line_type_to: LineType,
chunk_size: int,
empty: bool,
) -> None:
if empty:
# Level outside of z bounds so no lines produced.
level = 4.0
else:
# Lines includes a closed line loop as well as open line strips,
# and using chunk_size=2 or 3 there is an empty chunk.
level = 0.5
lines = contour_generator(z=z, line_type=line_type_from, chunk_size=chunk_size).lines(level)
converted = convert_lines(lines, line_type_from, line_type_to)
compare = contour_generator(z=z, line_type=line_type_to, chunk_size=chunk_size).lines(level)
util_test.assert_lines(converted, line_type_to)
# Converting Separate or SeparateCode to any ChunkCombined* returns all lines in a single chunk,
# so need to compare to dechunked_lines(compare).
if (line_type_from in (LineType.Separate, LineType.SeparateCode) and
line_type_to not in (LineType.Separate, LineType.SeparateCode)):
compare = dechunk_lines(compare, line_type_to)
util_test.assert_equal_recursive(converted, compare)
@pytest.mark.parametrize("fill_type_to", FillType.__members__.values())
@pytest.mark.parametrize("fill_type_from", FillType.__members__.values())
@pytest.mark.parametrize("chunk_size", (0, 2))
def test_convert_multi_filled(
z: cpy.CoordinateArray,
fill_type_from: FillType,
fill_type_to: FillType,
chunk_size: int,
) -> None:
levels = [0.5, 1.5, 2.5]
cont_gen = contour_generator(z=z, fill_type=fill_type_from, chunk_size=chunk_size)
multi_filled = cont_gen.multi_filled(levels)
if (fill_type_from in (FillType.ChunkCombinedCode, FillType.ChunkCombinedOffset) and
fill_type_to not in (FillType.ChunkCombinedCode, FillType.ChunkCombinedOffset)):
msg = f"Conversion from {fill_type_from} to {fill_type_to} not supported"
with pytest.raises(ValueError, match=msg):
convert_multi_filled(multi_filled, fill_type_from, fill_type_to)
else:
multi_converted = convert_multi_filled(multi_filled, fill_type_from, fill_type_to)
individual_converted = [convert_filled(filled, fill_type_from, fill_type_to)
for filled in multi_filled]
assert isinstance(multi_converted, list)
assert isinstance(individual_converted, list)
assert len(multi_converted) == len(levels) - 1
assert len(individual_converted) == len(levels) - 1
for from_multi, from_individual in zip(multi_converted, individual_converted):
util_test.assert_filled(from_multi, fill_type_to)
util_test.assert_filled(from_individual, fill_type_to)
util_test.assert_equal_recursive(from_multi, from_individual)
@pytest.mark.parametrize("line_type_to", LineType.__members__.values())
@pytest.mark.parametrize("line_type_from", LineType.__members__.values())
@pytest.mark.parametrize("chunk_size", (0, 2))
def test_convert_multi_lines(
z: cpy.CoordinateArray,
line_type_from: LineType,
line_type_to: LineType,
chunk_size: int,
) -> None:
levels = [-0.5, 0.5, 1.5]
cont_gen = contour_generator(z=z, line_type=line_type_from, chunk_size=chunk_size)
multi_lines = cont_gen.multi_lines(levels)
multi_converted = convert_multi_lines(multi_lines, line_type_from, line_type_to)
individual_converted = [convert_lines(lines, line_type_from, line_type_to)
for lines in multi_lines]
assert isinstance(multi_converted, list)
assert isinstance(individual_converted, list)
assert len(multi_converted) == len(levels)
assert len(individual_converted) == len(levels)
for from_multi, from_individual in zip(multi_converted, individual_converted):
util_test.assert_lines(from_multi, line_type_to)
util_test.assert_lines(from_individual, line_type_to)
util_test.assert_equal_recursive(from_multi, from_individual)
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