Disappearing Text in 3D Environment

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Bryan L. Croft (croft++at++cod.nosc.mil)
Wed, 5 Jul 95 15:55:53 PDT

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I have a disappearance problem with some text and a leader line that
is used to identify entities in the 3D environment. It works fine except
in some cases where view point angle or proximity to the entity is changed.
The text and leader line disappears. Yet if you move back to where it was
visible it will reappear.

For the text I use the following call from the app.
  
pfNodeTravFunc(G_text, PFTRAV_DRAW, NULL, place_text3D);

and in the draw process the function is as follows

place_text3D(pfTraverser *, void *data)
  {
    pfPushState();
    pfBasicState();
        .
        .
        .
    cmov(......);
        .
        .
        .
    pfPopState();
    return(PFTRAV_PRUNE);
  }

Any reason for loosing the text at given points, and what is the fix

      Bryan Croft
      NRAD, Code 44206
      e-mail croft++at++nosc.mil

  
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