Michael Andrews wrote:
> On a related theme, in the same function there is a block starting at
> line 1179 which calculates 'gather_grey' from 'Radiosity_Gather_Total'
> and 'Radiosity_Gather_Total_Count'.

OK, now I'm confused.

I had a look for these variables in the source:

$ grep -n 'Radiosity_Gather_Total' *.cpp
octree.cpp:1082:    Make_Colour(Radiosity_Gather_Total, 0., 0., 0.);
octree.cpp:1083:    Radiosity_Gather_Total_Count = 0;
radiosit.cpp:110:COLOUR Radiosity_Gather_Total;
radiosit.cpp:111:long Radiosity_Gather_Total_Count;
radiosit.cpp:837:    VAddEq(Radiosity_Gather_Total, Illuminance);
radiosit.cpp:838:    Radiosity_Gather_Total_Count++;
render.cpp:967:  Make_Colour(Radiosity_Gather_Total, 0.0, 0.0, 0.0);
render.cpp:968:  Radiosity_Gather_Total_Count = 0;
render.cpp:1185:      if ( Radiosity_Gather_Total_Count )
render.cpp:1187:        VInverseScale(avg_gather, 
Radiosity_Gather_Total,  (DBL)Radiosity_Gather_Total_Count);

$ grep -n 'Radiosity_Gather_Total' *.h
radiosit.h:89:extern COLOUR Radiosity_Gather_Total;
radiosit.h:90:extern long Radiosity_Gather_Total_Count;

$ grep -n 'avg_gather' *.cpp
render.cpp:957:  COLOUR Colour, avg_gather;
render.cpp:1187:        VInverseScale(avg_gather, 
Radiosity_Gather_Total,  (DBL)Radiosity_Gather_Total_Count);
render.cpp:1188:        gather_grey  = avg_gather[pRED]  +
avg_gather[pGREEN]  + avg_gather[pBLUE];

$ grep -n 'gather_grey' *.cpp
render.cpp:956:  DBL grey, gather_grey;
render.cpp:1188:        gather_grey  = avg_gather[pRED]  +
avg_gather[pGREEN]  + avg_gather[pBLUE];
render.cpp:1189:        if ( gather_grey > 0. )
render.cpp:1193:          /*opts.Radiosity_Brightness = 3. /
gather_grey; */

Looking at the code I can not see that these variables do anything. Am I
wrong?

Could someone please tell me what does effect the automatic radiosity
brightness adjustment?

A very puzzled,
	Mike Andrews.

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