Adding indexFromCoord function to CartGrid class

ABRG-Models / morphologica

A library of supporting code for numerical modelling (JSON config, HDF5 data, Modern OpenGL visualization)

https://abrg-models.github.io/morphologica/

Apache License 2.0

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Adding indexFromCoord function to CartGrid class #151

Closed blenk13 closed 11 months ago

blenk13 commented 11 months ago

CartGrid already has a findRectNearest function for finding the nearest grid location to a supplied 2D (x, y) coordinate. This PR adds a similar function that is faster and simpler for use solely with rectangular grids.