def test_rotate_local_x():
ucs = UCS()
assert ucs.ux == (1, 0, 0) # WCS x-axis
assert ucs.uy == (0, 1, 0) # WCS y-axis
assert ucs.uz == (0, 0, 1) # WCS z-axis
ucs = ucs.rotate_local_x(pi / 2)
assert ucs.ux.isclose((1, 0, 0)) # WCS x-axis
assert ucs.uy.isclose((0, 0, 1)) # WCS z-axis
assert ucs.uz.isclose((0, -1, 0)) # WCS -y-axis
# Copyright (c) 2020 Manfred Moitzi
# License: MIT License
from pathlib import Path
OUT_DIR = Path('~/Desktop/Outbox').expanduser()
import math
import ezdxf
from ezdxf.math import UCS
doc = ezdxf.new('R2010')
msp = doc.modelspace()
ucs = UCS() # New default UCS
# All rotation angles in radians, and rotation
# methods always return a new UCS.
ucs = ucs.rotate_local_x(math.radians(-45))
circle = msp.add_circle(
# Use UCS coordinates to place the 2d circle in 3d space
center=(0, 0, 2),
radius=1,
dxfattribs={'color': 1})
circle.transform(ucs.matrix)
# mark center point of circle in WCS
msp.add_point((0, 0, 2), dxfattribs={'color': 1}).transform(ucs.matrix)
ucs.render_axis(msp)
doc.saveas(OUT_DIR / 'ucs_circle.dxf')
