蟒蛇解决空间

来自开源 CAD 软件 SolveSpace 求解器的 Python 库。

• Python API
• C API

从单元测试中提取的示例：

from python_solvespace import SolverSystem, ResultFlag

sys = SolverSystem()
wp = sys.create_2d_base()  # Workplane (Entity)
p0 = sys.add_point_2d(0, 0, wp)  # Entity
sys.dragged(p0, wp)  # Make a constraint with the entity
...
line0 = sys.add_line_2d(p0, p1, wp)  # Create entity with others
...
line1 = sys.add_line_2d(p0, p3, wp)
sys.angle(line0, line1, 45, wp)  # Constrain two entities
line1 = sys.entity(-1)  # Entity handle can be re-generated and negatively indexed
...
if sys.solve() == ResultFlag.OKAY:
   # Get the result (unpack from the entity or parameters)
   # x and y are actually float type
   dof = sys.dof()
   x, y = sys.params(p2.params)
   ...
else:
   # Error!
   # Get the list of all constraints
   failures = sys.failures()
   ...

Solver也可以序列化和复制，但不能修改或撤消上一步。

import pickle
print(pickle.dumps(sys))

sys_new = sys.copy()

实体和参数句柄对求解器应该具有相同的生命周期。

安装

pip install python-solvespace

构建和测试（存储库）

首先从 repo 构建并安装模块：

git submodule update --init extlib/mimalloc extlib/eigen
cd cython
pip install -e .

重建模块：

pip install -e . --no-deps

运行单元测试：

python -m unittest

卸载模块：

pip uninstall python-solvespace