NAME:			specular
 
 CELL CONTENTS:
 	Each cell contains two hemispheres.  One hemisphere is 
 	positioned to the lower left of the other.  The hemisphere to the
 	lower left partially occludes the other.  The radius of each 
 	hemisphere is 80.  The center of the sphears the hemispheres were 
 	cut from are positioned at 20, -20, 100 for the front (lower left) 
 	and -20, 20 -100 for the back (lower left).  The front hemisphere 
 	is constructed with frontfacing facets while the back hemisphere 
 	is constructed with backfacing facet (thier per-vertex/per_facet 
 	normals are given as back facing, but if calculated by the rules 
 	for each primitive they would be frontfacing.  Within a cell all 
 	attributes are constant, however some attributes will effect the 
 	frontfacing facet and others will effect the backfacing facet.
 
 	Of the 10 variations of this test the output primitive used 
 	to create the facet is:
 
|	(specular.v01 - specular.v02) use "Polygon3" as the facets.
|	(specular.v03 - specular.v04) use "Fill_area_set3" as the facets.
|	(specular.v05 - specular.v06) use "Triangle3" as the facets.
|	(specular.v07 - specular.v08) use "Quad_mesh3" as the facets.
|	(specular.v09 - specular.v10) use "Index_polygon3" as the facets.
|	(specular.v11 - specular.v12) use "Non_uniform_bspline_surface" as the facets.
 
 CELL LAYOUT:
 	Cells are arranged on the screen in a matrix of 4 rows and
 	4 columns.
 
 CONSTANTS:
     Backface_processing 1 0 ;	% backface_identify but cull_none %
 	Background_color   		.3 .3 .8
 	Interior_style 			solid
 	Interior_color 			1.0 1.0 1.0
 	Backface_interior_color 	1.0 1.0 1.0
 		% backface_identify but cull_none %
     	Backface_processing 		1 0 ;	
 	Interior_lighting 		4	(Specular)
     	HLHS_Removal 			hlhs_enable 
 	Edge_flag 			disable
 	Text_prec			Stroke
 	Char_exp			1
 	Char_height			30
 	Text_color			1 1 1
 
   	Surface_properties
 	    % Ambient reflection coefficient    % 0.2
 	    % Diffuse reflection coefficient    % 0.25
 	    % Specular reflection coefficient   % VARIABLE
 	    % Specularity true-color components % 0 0 1
 	    % Specular exponent                 % 8
 	    % Transparency coefficient          % 1.0
 
   	Backface_properties
 	    % Ambient reflection coefficient    % 0.2
 	    % Diffuse reflection coefficient    % 0.25
 	    % Specular reflection coefficient   % VARIABLE
 	    % Specularity true-color components % 0 0 1
 	    % Specular exponent                 % 8
 	    % Transparency coefficient          % 1.0
 
    Define_light
      % Index in light source table   %  1
      % Light source color components %  1.0    0.0    0.0  % Red %
      % Non-directional light source  %  Ambient_light
     ;
    Define_light
      % Index in light source table   %  2
      % Light source color components %  0.5    1.0    0.5  % Greenish %
      % Directional     light source  %  Directional_light {
      % Direction                     %  1      1     -1       }
    ;
    Define_light
      % Index in light source table   %  3
      % Light source color components %  0.5    0.5    1.0  % Bluish %
      % Positional      light source  %  Positional_light {
      % Position                      %  0      100    200
      % Attenuation                   %  0.500  0.005          }
    ;
    Define_light
      % Index in light source table   %  4
      % Light source color components %  1.0    0.5    0.5
      % Spot            light source  %  Spot_light      {
      % Position                      %  0     -100    500
      % Direction                     %  0      0      1
      % Concentration                 %  10.00000
      % Spread angle in radians       %  0.558505
      % Attenuation                   %  1.000000    0.000000   }
    ;
 
 PER FILE VARIABLES:
 	Default_view_specification	parallel/perspective
 
 RANDOM VARIABLES:
   Interior_pattern_index ( interior_pattern_index should have no effect 
 			   since interior_style is fiexd as solid )
 
 COLUMN VARIABLES:
 				Column
 			1	    2		3	    4
   Variable:  		____	    ____	____	    ____
   Interior_shading	1(FLAT)	    2(GOURAUD)	3(DOT)	    4(PHONG)
   Surface_properties:  Specular reflection coeficient 
   			0	    0.33	0.66	    1
   Backface_properties: Specular reflection coeficient 
   			1	    0.66	0.33	    0
   Call/Execute		Exec	    Call	Exec	    Call
 	
 
 ROW VARIABLES:	
 
   Row		Light_state (those on )
   1		2 (Directional_light	)
   2		3 (Positional_light  	)
   3		4 (Spot_light		)
   4		1,2,3,4 (Ambient_light & the other three )
 
 
 ROW/COLUMN VARYING VARIABLES:
 NONE
 
 COMMENTS ON PHOTOGRAPHS:
 
 	*  Backface processing and specular highlights are being ignored 
 		in the photographs.  What you should see is depicted
 		below:
 
    _____             _____             _____             _____            
   /     \ _____     /     \ _____     /     \ _____     /     \ _____     
  /     3 /     \   /     2 /     \   /     1 /     \   /       /     \    
  \      /       \  \      /       \  \      /       \  \      /       \   
   \_____\       /   \_____\ 1     /   \_____\ 2     /   \_____\ 3     /   
          \_____/           \_____/           \_____/           \_____/    
    _____             _____             _____             _____            
   /     \ _____     /     \ _____     /     \ _____     /     \ _____     
  /  3    /     \   /  2    /     \   /   1   /     \   /       /     \    
  \      /       \  \      /       \  \      /       \  \      /       \   
   \_____\       /   \_____\    1  /   \_____\ 2     /   \_____\3      /   
          \_____/           \_____/           \_____/           \_____/    
    _____             _____             _____             _____            
   /     \ _____     /     \ _____     /     \ _____     /     \ _____     
  /       /     \   /       /     \   /       /     \   /       /     \    
  \      /       \  \      /       \  \      /       \  \      /       \   
   \_____\       /   \_____\       /   \_____\       /   \_____\       /   
          \_____/           \_____/           \_____/           \_____/    
    _____             _____             _____             _____            
   /   3 \ _____     /   2 \ _____     /   1 \ _____     /     \ _____     
  /       /     \   /       /    1\   /       /2    \   /       /     \    
  \      /       \  \  2   /       \  \    1 /       \  \      /3      \   
   \3____\       /   \_____\       /   \_____\ 2     /   \_____\ 3     /   
          \_____/           \_____/           \_____/           \_____/    
       
   
 	Were the number indicates the locations and intensity of a blue
 		specular highlight.  Intensity are listed below:
 
 		number	intensity
 		-----	---------
 		1	Dim
 		2	Brighter
 		3	Brightest
 
 	*  The text size (for the text at toe bottom of the screen )
 		was reduced from the size on the photograph.  Additional
 		information has been added to that text.

.