BATSim is designed to enable the application of non-affine shear transformations to GalSim images. It works by trasnforming the stamp pixel grid, distorting the location of the pixel centers. When a GalSim image is sampled onto this distorted grid, the resulting image will be sheared due to the transformation of the pixel grid.
Non-affine transforms can simualate complex shear effects such as intrinsic alignment, flexion, and optical field distrotion maps. Custom transform functions can also be passed to Stamp objects.
The package is not currently available on PyPI while in early development.
First clone the repository:
git clone https://github.com/CMacM/BATSim.gitThen install the package
cd BATSim
conda install --file requirements.txt -c conda-forge
pip install . --user
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