def setup(scene_res, detector_res):
"""Returns a scene to xray
scene_res: resolution of the scene cubic, e.g. 32 equals 32^3
detector_res: resolution of the detectors squared, e.g. 22 equals 22^2
"""
srclist, detectorlist, scenedefs, objectlist = snake(
scene_res, detector_res)
# build a model of all materials
materials = Material.initAll()
# build scene
scenegrid, scenematerials = buildscene(scenedefs, objectlist)
return (srclist, detectorlist, scenegrid, scenematerials, materials,
scene_res, detector_res)
