What was the scenario in which you might want to use absolute value?
doberdog91
Probably never? Probably don't want to color the surface if light hits its inner face
idkLinearAlgebra
Why using 0 instead is correct?
ohmygearbox
use absolute value bc dot product can be negative. I guess dot product is negative when angle is > 90 degrees meaning angle is coming from other side of surface
What was the scenario in which you might want to use absolute value?
Probably never? Probably don't want to color the surface if light hits its inner face
Why using 0 instead is correct?
use absolute value bc dot product can be negative. I guess dot product is negative when angle is > 90 degrees meaning angle is coming from other side of surface