| Safe Haskell | Safe-Inferred |
|---|
Data.CG.Minus.Colour.Planck
Description
Planck radiation equation.
- planck_rad_eq :: Floating a => a -> a -> a
- k_to_rgb :: (Floating t, Ord t) => t -> (t, t, t)
- k_to_colour :: Double -> C
Documentation
planck_rad_eq :: Floating a => a -> a -> aSource
Given wavelength (in microns) and temperature (in degrees Kelvin) solve Planck's radiation equation.
planck_rad_eq 0.7 2600 == 8.22656629154115e7
k_to_rgb :: (Floating t, Ord t) => t -> (t, t, t)Source
Return the color of a black body emitting light at a given
temperature. The Planck radiation equation is solved directly for
the R, G, and B wavelengths defined for the CIE 1931 Standard
Colorimetric Observer. The colour temperature is specified in
degrees Kelvin. Typical constraints for star temperatures are >=
2600K (S Cephei, R Andromedae) and <= 28,000K (Spica).
let h (r,g,b) = let f = floor . (*) 255 in (f r,f g,f b) in map (h . k_to_rgb) [2600,28000] == [(255,95,22),(49,118,254)]