Closed loop example

The following code fragment creates a loop with the EOFill set to True and a pinned uniform knot vector (both by default because they are unspecified). Notice that this code is almost exactly like the quadratic curve from a TGRPointArray example. To keep the code fragment concise, the code that creates the attribute is not shown.

  static const TGRPoint loopPointArray[ 4 ] = {
                              TGRPoint( 175, 125, 1 ), 
                              TGRPoint( 195, 200, 1 ),
                              TGRPoint( 245, 175, 1 ),
                              TGRPoint( 220, 150, 1 ) 
                                              };
  
  TGRPointArray aLoopArray( 4 );
  for( long n = 0; n < 4; n++ )
      aLoopArray.SetPoint( n, loopPointArray[ n ] );
  
  TGLoop aGeneralLoop( 4, aLoopArray, knots );
  TFillAndFrameBundle aBundle( TRGBColor( .75, .5, .5), TRGBColor( 0, 0, 0 ), 5.0 );
  thePort.Draw( aGeneralLoop, aBundle );