   Computing View Volume Parameters at Runtime
  I have to compute the parameters of the view volume (Perspective - gluPerspective) at run time.My approach is  as follows1. Find bounds of the mesh (xmin,xmax,ymin,ymax,zmin,zmax).2. set znear = zmin + threshold, zfar = zmax + threshold. (threshold   some constant value hard coded).3. Compute distance = ZNear - ZPositionoftheCamera.  4. Compute fov  = 2*tan-1(height/2*distance);Are the above steps enough for computing view volume at run time?[Edited by - rajesh_nest on September 2, 2010 11:18:50 AM]
  Hope My  query did not confuse? Let me make it clear.I am developing a meshviewer software. I was manually correcting parameters of Perspective viewing volume (fov,aspect ration,ZNear and Zfar), for the viewing the mesh.Now I want the software to automatically compute parameters when the mesh is loaded. The steps listed above is suppose to do same. But I am not sure, whether the  steps are correct.   