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  1. .TH SREGION
  2.  6 "IRIT Version 6.0" 
  3. .SH NAME
  4. SREGION
  5.  
  6.  
  7.  
  8.  SurfaceType SREGION( SurfaceType Srf, ConstantType Direction,
  9.                                   NumericType MinParam, NumericType MaxParam )
  10.  
  11. Extracts a region of Srf between MinParam and MaxParam
  12. in the specified Direction. Both MinParam and MaxParam
  13. should be contained in the parametric domain of Srf in Direction.
  14.  
  15. Example:
  16.  
  17.     Srf = ruledSrf( cbezier( list( ctlpt( E3, -0.5, -0.5, 0.5 ),
  18.                                    ctlpt( E3,  0.0,  0.5, 0.0 ),
  19.                                    ctlpt( E3,  0.5, -0.5, 0.0 ) ) ),
  20.                     cbezier( list( ctlpt( E3, -0.5,  0.5, 0.0 ),
  21.                                    ctlpt( E3,  0.0,  0.0, 0.0 ),
  22.                                    ctlpt( E3,  0.5,  0.5, 0.5 ) ) ) );
  23.     SubSrf = SREGION( Srf, ROW, 0.3, 0.6 );
  24.  
  25. extracts the region of Srf from the parameter value 0.3 to the
  26. parameter value 0.6 along the ROW direction. the COLumn direction is
  27. extracted as a whole.
  28.