Computer Science 215
                               Quiz H      Name ______________________

1. In the full color raytracer the TOTAL number of input values
   needed to specify the emissivity of a light is:

   a. 1                          b. 3

   c. 6                          d. 9

2. In the full color raytracer the TOTAL number of input values
   needed to specify ALL aspects of the reflectivity of a surface is:

   a. 1                          b. 3

   c. 6                          d. 9


3. In the grayscale raytracer,  the function ray_trace() was expected
   to return single double precision value representing the intensity
   of a pixel. In the color version

   a. this same approach still   b. Something like the following should
      works                         be used:

                                      double intensity[3];
   c. The address of a vector          :
      such as the one shown in       intensity = ray_trace();
      (b). should be passed as
      an input parameter to
      ray_trace()

4. In the strategy recommended in class last time,  the function
   ray_trace()

   a. should still be called once   b. must be called 3 times for every
      per pixel                        pixel processed

   c. must be called 256 times      d. must be called 256^3 times for
      for every pixel processed        every pixel processed