Fix convention mismatch galsim <-> DM. Rework code.

LSSTDESC / descwl-shear-sims

simple simulations for testing weak lensing shear measurement

BSD 3-Clause "New" or "Revised" License

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Closed esheldon closed 2 years ago

esheldon commented 2 years ago

The galsim convention is 1-offset, DM 0-offset. This was fixed by modifying crpix when converting galsim wcs to dm wcs
Simplified the building of bounding boxes
Added a simpler coadd wcs/bbox code that is not used but serves to make it more clear how it works.

esheldon commented 2 years ago

Is this OK after modifying the github action?