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20 hours ago •
CadQuery
CadQuery
loft() chooses "incorrect" wire?
I am trying to achieve something like what is described in https://stackoverflow.com/questions/61186339/how-to-iteratively-loft-wires-in-cadquery :+1:
import cadquery as cq
wp = cq.Workplane("XY").rect(1,2).workplane()
result = None
for i in range(0,5):
wp2 = wp.transformed(offset=cq.Vector(0, -0.5, 1.0),rotate=cq.Vector(10, 0, 0)).rect(1,2).workplane()
if result == None:
result = wp2.loft(combine=True)
else:
nextpart = wp2.loft(combine=True)
result = result.union(nextpart)
wp = wp.transformed(offset=cq.Vector(0, -0.5, 1.0),rotate=cq.Vector(10, 0, 0)).rect(1,2).workplane()
show_object(result, options=dict(alpha=0.5,color='red'))
(in my case it would be not just a .rect but a .polyline with different at each step shape), but for my this example renders differently than on that page, and seems incorrect -- wide side face connects to the wire of 2nd rect instead of the one before:
re-installed clean using conda create -n cq-editor2 -c cadquery -c conda-forge cq-editor=master to the same result.
versions I have installed in conda
$> conda list
# packages in environment at /home/yoh/anaconda-5.2.0-2.7/envs/cq-editor2:
#
# Name Version Build Channel
_libgcc_mutex 0.1 conda_forge conda-forge
_openmp_mutex 4.5 1_gnu conda-forge
alabaster 0.7.12 py_0 conda-forge
appdirs 1.4.4 pyh9f0ad1d_0 conda-forge
argh 0.26.2 pyh9f0ad1d_1002 conda-forge
astroid 2.4.2 py38h32f6830_1 conda-forge
async_generator 1.10 py_0 conda-forge
atomicwrites 1.4.0 pyh9f0ad1d_0 conda-forge
attrs 20.3.0 pyhd3deb0d_0 conda-forge
autopep8 1.5.4 pyh9f0ad1d_0 conda-forge
babel 2.9.0 pyhd3deb0d_0 conda-forge
backcall 0.2.0 pyh9f0ad1d_0 conda-forge
backports 1.0 py_2 conda-forge
backports.functools_lru_cache 1.6.1 py_0 conda-forge
black 20.8b1 py_1 conda-forge
bleach 3.2.1 pyh9f0ad1d_0 conda-forge
brotlipy 0.7.0 py38h8df0ef7_1001 conda-forge
bzip2 1.0.8 h516909a_3 conda-forge
c-ares 1.17.1 h36c2ea0_0 conda-forge
ca-certificates 2020.11.8 ha878542_0 conda-forge
cadquery master py3.8 cadquery
certifi 2020.11.8 py38h578d9bd_0 conda-forge
cffi 1.14.4 py38ha312104_0 conda-forge
chardet 3.0.4 py38h924ce5b_1008 conda-forge
click 7.1.2 pyh9f0ad1d_0 conda-forge
cloudpickle 1.6.0 py_0 conda-forge
cq-editor master py3.8 cadquery
cryptography 3.2.1 py38h7699a38_0 conda-forge
curl 7.71.1 he644dc0_8 conda-forge
dataclasses 0.7 pyhb2cacf7_7 conda-forge
dbus 1.13.6 hfdff14a_1 conda-forge
decorator 4.4.2 py_0 conda-forge
defusedxml 0.6.0 py_0 conda-forge
diff-match-patch 20200713 pyh9f0ad1d_0 conda-forge
docutils 0.16 py38h924ce5b_2 conda-forge
double-conversion 3.1.5 he1b5a44_2 conda-forge
eigen 3.3.8 h0efe328_0 conda-forge
entrypoints 0.3 pyhd8ed1ab_1003 conda-forge
expat 2.2.9 he1b5a44_2 conda-forge
ezdxf 0.14.2 py_0 conda-forge
ffmpeg 4.3.1 h3215721_1 conda-forge
flake8 3.8.4 py_0 conda-forge
fontconfig 2.13.1 h7e3eb15_1002 conda-forge
freetype 2.10.4 h7ca028e_0 conda-forge
future 0.18.2 py38h578d9bd_2 conda-forge
gettext 0.19.8.1 hf34092f_1004 conda-forge
gl2ps 1.4.2 he06d7ca_0 conda-forge
glew 2.1.0 he1b5a44_0 conda-forge
glib 2.66.3 h58526e2_0 conda-forge
gmp 6.2.1 h58526e2_0 conda-forge
gnutls 3.6.13 h85f3911_1 conda-forge
gst-plugins-base 1.14.5 h0935bb2_2 conda-forge
gstreamer 1.14.5 h36ae1b5_2 conda-forge
hdf4 4.2.13 hf30be14_1003 conda-forge
hdf5 1.10.6 nompi_h2750804_1111 conda-forge
helpdev 0.7.1 pyhd8ed1ab_0 conda-forge
icu 67.1 he1b5a44_0 conda-forge
idna 2.10 pyh9f0ad1d_0 conda-forge
imagesize 1.2.0 py_0 conda-forge
importlib-metadata 3.1.0 pyhd8ed1ab_0 conda-forge
importlib_metadata 3.1.0 hd8ed1ab_0 conda-forge
intervaltree 3.0.2 py_0 conda-forge
ipykernel 5.3.4 py38h81c977d_1 conda-forge
ipython 7.19.0 py38h81c977d_0 conda-forge
ipython_genutils 0.2.0 py_1 conda-forge
isort 5.6.4 py_0 conda-forge
jedi 0.17.2 py38h578d9bd_1 conda-forge
jeepney 0.6.0 pyhd8ed1ab_0 conda-forge
jinja2 2.11.2 pyh9f0ad1d_0 conda-forge
jpeg 9d h36c2ea0_0 conda-forge
jsoncpp 1.8.4 hc9558a2_1002 conda-forge
jsonschema 3.2.0 py_2 conda-forge
jupyter_client 6.1.7 py_0 conda-forge
jupyter_core 4.7.0 py38h578d9bd_0 conda-forge
jupyterlab_pygments 0.1.2 pyh9f0ad1d_0 conda-forge
keyring 21.5.0 py38h578d9bd_0 conda-forge
krb5 1.17.2 h926e7f8_0 conda-forge
lame 3.100 h14c3975_1001 conda-forge
lazy-object-proxy 1.4.3 py38h1e0a361_2 conda-forge
ld_impl_linux-64 2.35.1 hed1e6ac_0 conda-forge
libblas 3.9.0 3_openblas conda-forge
libcblas 3.9.0 3_openblas conda-forge
libclang 10.0.1 default_hde54327_1 conda-forge
libcurl 7.71.1 hcdd3856_8 conda-forge
libedit 3.1.20191231 he28a2e2_2 conda-forge
libev 4.33 h516909a_1 conda-forge
libevent 2.1.10 hcdb4288_3 conda-forge
libffi 3.2.1 he1b5a44_1007 conda-forge
libgcc-ng 9.3.0 h5dbcf3e_17 conda-forge
libgfortran-ng 9.3.0 he4bcb1c_17 conda-forge
libgfortran5 9.3.0 he4bcb1c_17 conda-forge
libglib 2.66.3 hbe7bbb4_0 conda-forge
libglu 9.0.0 he1b5a44_1001 conda-forge
libgomp 9.3.0 h5dbcf3e_17 conda-forge
libiconv 1.16 h516909a_0 conda-forge
liblapack 3.9.0 3_openblas conda-forge
libllvm10 10.0.1 he513fc3_3 conda-forge
libnetcdf 4.7.4 nompi_hefab0ff_106 conda-forge
libnghttp2 1.41.0 h8cfc5f6_2 conda-forge
libogg 1.3.2 h516909a_1002 conda-forge
libopenblas 0.3.12 pthreads_h4812303_1 conda-forge
libpng 1.6.37 h21135ba_2 conda-forge
libpq 12.3 h5513abc_2 conda-forge
libsodium 1.0.18 h36c2ea0_1 conda-forge
libspatialindex 1.9.3 he1b5a44_3 conda-forge
libssh2 1.9.0 hab1572f_5 conda-forge
libstdcxx-ng 9.3.0 h2ae2ef3_17 conda-forge
libtheora 1.1.1 h516909a_1004 conda-forge
libtiff 4.1.0 h4f3a223_6 conda-forge
libuuid 2.32.1 h14c3975_1000 conda-forge
libvorbis 1.3.7 he1b5a44_0 conda-forge
libwebp-base 1.1.0 h36c2ea0_3 conda-forge
libxcb 1.13 h14c3975_1002 conda-forge
libxkbcommon 0.10.0 he1b5a44_0 conda-forge
libxml2 2.9.10 h68273f3_2 conda-forge
logbook 1.5.3 py38h1e0a361_3 conda-forge
loguru 0.5.3 py38h32f6830_2 conda-forge
lz4-c 1.9.2 he1b5a44_3 conda-forge
markupsafe 1.1.1 py38h8df0ef7_2 conda-forge
mccabe 0.6.1 py_1 conda-forge
mistune 0.8.4 py38h25fe258_1002 conda-forge
mypy_extensions 0.4.3 py38h32f6830_2 conda-forge
mysql-common 8.0.21 2 conda-forge
mysql-libs 8.0.21 hf3661c5_2 conda-forge
nbclient 0.5.1 py_0 conda-forge
nbconvert 6.0.7 py38h578d9bd_3 conda-forge
nbformat 5.0.8 py_0 conda-forge
ncurses 6.2 h58526e2_4 conda-forge
nest-asyncio 1.4.3 pyhd8ed1ab_0 conda-forge
nettle 3.6 he412f7d_0 conda-forge
nptyping 1.3.0 pyh9f0ad1d_1 conda-forge
nspr 4.29 he1b5a44_1 conda-forge
nss 3.59 h2c00c37_0 conda-forge
numpy 1.19.4 py38hf0fd68c_1 conda-forge
numpydoc 1.1.0 py_1 conda-forge
occt 7.4.0 h9121d39_5 cadquery
ocp 7.4 1_py3.8 cadquery
openh264 2.1.1 h8b12597_0 conda-forge
openssl 1.1.1h h516909a_0 conda-forge
packaging 20.4 pyh9f0ad1d_0 conda-forge
pandoc 2.11.2 h36c2ea0_0 conda-forge
pandocfilters 1.4.2 py_1 conda-forge
parso 0.7.0 pyh9f0ad1d_0 conda-forge
path 15.0.0 py38h578d9bd_1 conda-forge
path.py 12.5.0 0 conda-forge
pathspec 0.8.1 pyhd3deb0d_0 conda-forge
pathtools 0.1.2 py_1 conda-forge
pcre 8.44 he1b5a44_0 conda-forge
pexpect 4.8.0 pyh9f0ad1d_2 conda-forge
pickleshare 0.7.5 py_1003 conda-forge
pip 20.2.4 py_0 conda-forge
pluggy 0.13.1 py38h924ce5b_3 conda-forge
proj 7.1.1 h966b41f_3 conda-forge
prompt-toolkit 3.0.8 pyha770c72_0 conda-forge
psutil 5.7.3 py38h8df0ef7_0 conda-forge
pthread-stubs 0.4 h36c2ea0_1001 conda-forge
ptyprocess 0.6.0 py_1001 conda-forge
pugixml 1.10 he1b5a44_1 conda-forge
pycodestyle 2.6.0 pyh9f0ad1d_0 conda-forge
pycparser 2.20 pyh9f0ad1d_2 conda-forge
pydocstyle 5.1.1 py_0 conda-forge
pyflakes 2.2.0 pyh9f0ad1d_0 conda-forge
pygments 2.7.2 py_0 conda-forge
pylint 2.6.0 py38h32f6830_1 conda-forge
pyls-black 0.4.6 pyh9f0ad1d_0 conda-forge
pyls-spyder 0.2.1 pyhd3deb0d_0 conda-forge
pyopenssl 19.1.0 py_1 conda-forge
pyparsing 2.4.7 pyh9f0ad1d_0 conda-forge
pyqt 5.12.3 py38ha8c2ead_4 conda-forge
pyqt5-sip 4.19.18 pypi_0 pypi
pyqtchart 5.12 pypi_0 pypi
pyqtgraph 0.11.0 pyh9f0ad1d_1 conda-forge
pyqtwebengine 5.12.1 pypi_0 pypi
pyrsistent 0.17.3 py38h25fe258_1 conda-forge
pysocks 1.7.1 py38h924ce5b_2 conda-forge
python 3.8.6 h852b56e_0_cpython conda-forge
python-dateutil 2.8.1 py_0 conda-forge
python-jsonrpc-server 0.4.0 pyh9f0ad1d_0 conda-forge
python-language-server 0.36.1 pyhd8ed1ab_1 conda-forge
python_abi 3.8 1_cp38 conda-forge
pytz 2020.4 pyhd8ed1ab_0 conda-forge
pyxdg 0.26 py_0 conda-forge
pyyaml 5.3.1 py38h8df0ef7_1 conda-forge
pyzmq 20.0.0 py38h1d1b12f_1 conda-forge
qdarkstyle 2.8.1 pyhd8ed1ab_2 conda-forge
qt 5.12.9 h1f2b2cb_0 conda-forge
qtawesome 1.0.1 pyhd8ed1ab_1 conda-forge
qtconsole 5.0.1 pyhd8ed1ab_0 conda-forge
qtpy 1.9.0 py_0 conda-forge
readline 8.0 he28a2e2_2 conda-forge
regex 2020.11.13 py38h25fe258_0 conda-forge
requests 2.25.0 pyhd3deb0d_0 conda-forge
rope 0.18.0 pyh9f0ad1d_0 conda-forge
rtree 0.9.4 py38h02d302b_2 conda-forge
scipy 1.5.3 py38hb2138dd_0 conda-forge
secretstorage 3.3.0 py38h578d9bd_0 conda-forge
setuptools 49.6.0 py38h924ce5b_2 conda-forge
six 1.15.0 pyh9f0ad1d_0 conda-forge
snowballstemmer 2.0.0 py_0 conda-forge
sortedcontainers 2.3.0 pyhd8ed1ab_0 conda-forge
sphinx 3.3.1 pyhd8ed1ab_0 conda-forge
sphinxcontrib-applehelp 1.0.2 py_0 conda-forge
sphinxcontrib-devhelp 1.0.2 py_0 conda-forge
sphinxcontrib-htmlhelp 1.0.3 py_0 conda-forge
sphinxcontrib-jsmath 1.0.1 py_0 conda-forge
sphinxcontrib-qthelp 1.0.3 py_0 conda-forge
sphinxcontrib-serializinghtml 1.1.4 py_0 conda-forge
spyder 4.2.0 py38h578d9bd_0 conda-forge
spyder-kernels 1.10.0 py38h578d9bd_0 conda-forge
sqlite 3.33.0 h4cf870e_1 conda-forge
tbb 2020.2 hc9558a2_0 conda-forge
tbb-devel 2020.2 hc9558a2_0 conda-forge
testpath 0.4.4 py_0 conda-forge
three-merge 0.1.1 pyh9f0ad1d_0 conda-forge
tk 8.6.10 hed695b0_1 conda-forge
toml 0.10.2 pyhd8ed1ab_0 conda-forge
tornado 6.1 py38h25fe258_0 conda-forge
traitlets 5.0.5 py_0 conda-forge
typed-ast 1.4.1 py38h25fe258_1 conda-forge
typing_extensions 3.7.4.3 py_0 conda-forge
typish 1.9.1 pyh9f0ad1d_0 conda-forge
ujson 4.0.1 py38h950e882_1 conda-forge
urllib3 1.25.11 py_0 conda-forge
utfcpp 3.1.2 0 conda-forge
vtk 9.0.1 no_osmesa_py38h31de780_102 conda-forge
watchdog 0.10.4 py38h578d9bd_0 conda-forge
wcwidth 0.2.5 pyh9f0ad1d_2 conda-forge
webencodings 0.5.1 py_1 conda-forge
wheel 0.35.1 pyh9f0ad1d_0 conda-forge
wrapt 1.11.2 py38h1e0a361_1 conda-forge
wurlitzer 2.0.0 py38h32f6830_2 conda-forge
x264 1!152.20180806 h14c3975_0 conda-forge
xorg-kbproto 1.0.7 h14c3975_1002 conda-forge
xorg-libice 1.0.10 h516909a_0 conda-forge
xorg-libsm 1.2.3 h84519dc_1000 conda-forge
xorg-libx11 1.6.12 h516909a_0 conda-forge
xorg-libxau 1.0.9 h14c3975_0 conda-forge
xorg-libxdmcp 1.1.3 h516909a_0 conda-forge
xorg-libxext 1.3.4 h516909a_0 conda-forge
xorg-libxt 1.2.0 h516909a_0 conda-forge
xorg-xextproto 7.3.0 h14c3975_1002 conda-forge
xorg-xproto 7.0.31 h14c3975_1007 conda-forge
xz 5.2.5 h516909a_1 conda-forge
yaml 0.2.5 h516909a_0 conda-forge
yapf 0.30.0 pyh9f0ad1d_0 conda-forge
zeromq 4.3.3 h58526e2_3 conda-forge
zipp 3.4.0 py_0 conda-forge
zlib 1.2.11 h516909a_1010 conda-forge
zstd 1.4.5 h6597ccf_2 conda-forge
PS if someone could share a code snippet for similar, no rotation just vertically loft-ing up polylines -- would be VERY much appreciated, I am cadquery newbee and still fighting how to do it properly
Hi,
it seems like you are facing the same issue as I described in #520. Loft sometimes flips wires which you assign to it resulting in self-intersecting lofts. And the use of .union() on self-intersecting pieces produces glitches like you described.
I made a workaround which you can lookup in the other thread. Just need to replace .rect() with .polyline()
This is not related to #520, you can make your code work like so (clean=False in the union):
import cadquery as cq
wp = cq.Workplane("XY").rect(1,2).workplane()
result = None
for i in range(0,5):
wp2 = wp.transformed(offset=cq.Vector(0, -0.5, 1.0),rotate=cq.Vector(10, 0, 0)).rect(1,2).workplane()
if result == None:
result = wp2.loft(combine=True)
else:
nextpart = wp2.loft(combine=True)
result = result.union(nextpart,clean=False)
wp = wp.transformed(offset=cq.Vector(0, -0.5, 1.0),rotate=cq.Vector(10, 0, 0)).rect(1,2).workplane()
@yarikoptic note that you can also use sweep to get smoothly varying sections