[info-performer] help: pfASD is popping in/out

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From: Michael Logan (mlogan++at++mail.arc.nasa.gov)
Date: 07/22/2003 15:11:12

A couple of questions..

I'm using NON-paged ASDs resulting from a call to pfdBuildASD()
 in the same fashion as the pfdem,pfdted loaders.

AND I'm using the asd .config file with my own loader to do it.

1) While most of the terrain behaves normally, the center of my model
 keeps popping in/out - seemingly not based on distance, but rather
 when it starts to clip on the left&right. The data is from processed
 seamless NED data (3601 x 3601). This seems to happen on
 various platforms, PF 2.5.2, any number of PFASDLODSIZE.

  The popping is extreme for this area, but smooth everywhere else.

2) Getting the pfGenTex matrix set correctly in the .config file
     seems a bit "art-sy". I tried printing out the pfASDBox
     and use those dimensions to help set the matrix. Is it supposed
     to be something like this?
          (1/xsize) 0 0 0
            0 (1/ysize) 0 0
            0 0 (1/zsize) 0
            0 0 0 1

     But I have to fudge the numbers (still not right) to get the
        texture even close to correct.

thanks for any suggestions.

ml 

-- 
Michael Logan  (650)-604-4494  QSS Group,Inc.   NASA Ames Research Center
Task Lead, Visual Cueing & Simulation
MS 262-6,Moffett Field, CA, 94035
private: vonlogan++at++rcn.com, http://users.rcn.com/vonlogan/index.htm

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