Subject: sp7.out

(This message is being sent to CPSC 215 Students and TA's)

Some students have asked how / why / what is the meaning
in sp7.out of:

    11 Diffuse reflectivity        3.465   0.000   0.000
    12 Current ivec                3.465   0.000   0.000

The value of Diffuse reflectivity here should be the
illumination associated with the CURRENT LIGHT and NOT the input
value material.diffuse (which was 5.0 0.0 0.0! Current ivec
should be the sum of the contributions of ALL lights. Since
sp7main has ONLY ONE LIGHT, the values should be equal here, but
would NOT be equal IF there had been multiple lights that
illuminated the hitloc.