# NOT RUN {
# query current whitepoint (D65 by default)
whitepoint()
# Illuminant E
whitepoint(XYZ(100, 100, 100))
# equivalently
whitepoint(100, 100, 100)
whitepoint(c(100, 100, 100))
whitepoint(cbind(100, 100, 100))
whitepoint()
## reset
whitepoint(NULL)
whitepoint()
# }
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