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#ActualÁlvaro

Posted 19 November 2012 - 08:24 AM

Point lights being Dirac delta functions has nothing to do with frequency space. The function that we are trying to approximate using spherical harmonics is the radiant intensity (measured in Watts per steradian). If light is coming concentrated from a single point, that function is actually a delta (some amount of light is coming from a single point, which means something like infinite radiant intensity at that particular point).

By the way, delta functions are not actually functions: They are measures. I felt dirty after having written the paragraph above. :)

#2Álvaro

Posted 19 November 2012 - 08:23 AM

Point lights being Dirac delta functions has nothing to do with frequency space. The function that we are trying to approximate using spherical harmonics is the radiant intensity (measured in Watts per steradian). If light is coming concentrated from a single point, that function is actually a delta.


By the way, delta functions are not actually functions: They are measures. I felt dirty after having written the paragraph above. Posted Image

#1Álvaro

Posted 19 November 2012 - 08:22 AM

Point lights being Dirac delta functions has nothing to do with frequency space. The function that we are trying to approximate using spherical harmonics is the radiant intensity (measured in Watts per steradian). If light is coming concentrated from a single point, that function"is actually a delta.


By the way, delta functions are not actually functions: They are measures. I felt dirty after having written the paragraph above. :)

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