gbs
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gbs is a c++ header library to build and manage NURBS, some optional module are used for visualization and export. This library is compatible with OpenCASACADE and has a python biding.
GBS is header library for computing bspline curves and surfaces.
GBS is compatible with OpenCASCADE, curves and surfaces can be converted to OpenCASCADE's objects.
Example of point cloud approximation:
Example of points surface interpolation:
Example of curve-surface intersection:
Example of loft-surface creation:
Example of surface approximation of points:
Example of curve 2d variable offset:
Example of curve on surface:
Example of python code to interpolate points
pts = [
[0.,0.,0],
[0.,0.,1],
[1.,0.,0.5],
[1.,1.,1]
]
constraints = []
for p in pts:
constraints.append([p])
degree = 2
crv = gbs.interpolate_cn_3d_d(
constraints,
degree,
gbs.KnotsCalcMode.CHORD_LENGTH
)
For now, this lib is to be used inside a conda environment with the following package installed:
- nlopt
- eigen3
- boost >= 1.74
The optional module gbs-occt requires the additional package:
- occt >=7.4.0
The optional module render requires the additional package:
- vtk >=9.0
The python bindings requires the additional package:
- pybind11
The test library needs:
- gtest
- occt>=7.4.0
- sundials
Warning tests relative to performances evaluation should be run in release mode
As GBS base is a header library it doesn’t need compilation.
If one needs to compile the optional module gbs-occt, -DUSE_OCCT_UTILS:BOOL=TRUE shall be added to cmake command. If one needs to compile the optional module render, -DUSE_RENDER:BOOL=TRUE shall be added to cmake command. If one needs to compile the optional module python-bindings, -DUSE_PYTHON_BINDINGS=TRUE shall be added to cmake command.
The full test suite, which require the optional module gbs-occt, please add -DGBS_BUILD_TESTS:BOOL=TRUE to the cmake command.
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