Hierarchical and deeply parametric models using cadquery
What is cqparts?
cqparts is CAD for Python programmers, short for “cadquery parts”.
Using cqparts you can wrap geometry made with cadquery to build complex and deeply parametric models.
Full documentation at: https://fragmuffin.github.io/cqparts
You’ll need to fulfill the requirements of cadquery, the simplest way to do that is to install cadquery first by following the instructions here:
Once cadquery is installed, install cqparts with:
pip install cqparts
cqparts_* Content Libraries
You can also install content libraries with a similar pip install command.
List available libraries with:
pip search cqparts_
For example, to install the cqparts_bearings content library, run:
pip install cqparts_bearings
Here is just one of the simplest examples to give you an idea of what this library does.
More detailed examples found in the official documentation for cqparts.
Wrapping a Cube
A simple cube defined with cadquery alone:
# create unit cube solid import cadquery size = 10 cube = cadquery.Workplane('XY').box(size, size, size) # display cube (optional) from Helpers import show show(cube)
Wrapping this in a cqparts.Part object can be done like this:
# create unit cube as cqparts.Part import cadquery import cqparts from cqparts.params import PositiveFloat class MyCube(cqparts.Part): size = PositiveFloat(1, doc="cube size") def make(self): return cadquery.Workplane('XY').box(self.size, self.size, self.size) # create cube instance cube = MyCube(size=10) # display cube (optional) from cqparts.display import display display(cube)
You can see that under the bonnet (in the make function) the geometry is created with cadquery, but the resulting MyCube class is instantiated more intuitively, and more object orientated.
Creating a Hierarchy
cqparts can also be used to create a deep hierarchy of parts and assemblies to build something deeply complicated and entirely parametric.
A simple example of this is the toy car tutorial.
The work done in cqparts_fasteners is a good example of how useful cqparts wrapping can be; read about the Fastener class, how it works, and what can be done with it in the cqparts_fasteners docs
Issues, and Pull Requests are encouraged, and happily received, please read CONTRIBUTING.md for guidance on how to contribute.
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