Define here the attenuation parameters of the new light.
Axial
Set the
Constant,
Linear,
Quadratic parameters
that control the axial attenuation. This is defined only for positional
and spot lights. The axial attenuation factor is given by:
Axial Attenuation Factor = 1/(constant + linear*distance + quadratic*distance*distance)
Radial
Controls the radial attenuation, defined only for spot
lights. The radial attenuation factor is given by:
Radial Attenuation Factor = [max (0, vertex . direction)]**radial