create_transform()

Ttransform pgplot::pgaff::create_transform	(	const Tarray::Tcoc &	a,
		const pgplot::Trect &	rect,
		const bool &	xisfirst
	)

create standard transform array

Definition at line 102 of file affpgplot.cc.

References pgplot::Trange::fullrange(), pgplot::Trange::min, pgplot::Trect::x, and pgplot::Trect::y.

Referenced by gray().

    {
      Ttransform retval;
      Tarray::Tshape shape(a.shape());
      shape.setfirst(Tarray::Tshape::TIndexVec(1));
      retval=0.;
      int ix,iy,ibx,iby,nx,ny,fx,fy;
      ibx=0;
      iby=3; 
      if (xisfirst) 
      {
        ix=1;
        iy=5;
        nx=shape.size(0);
        ny=shape.size(1);
        fx=shape.first(0);
        fy=shape.first(1);
      }
      else
      {
        ix=2; 
        iy=4; 
        nx=shape.size(1);
        ny=shape.size(0);
        fx=shape.first(1);
        fy=shape.first(0);
      }
      Trange xrange=rect.x;
      Trange yrange=rect.y;
      retval[ix]=xrange.fullrange()/float(nx);
      retval[iy]=yrange.fullrange()/float(ny);
      retval[ibx]=xrange.min-retval[ix]*(float(fx)-0.5);
      retval[iby]=yrange.min-retval[iy]*(float(fy)-0.5);
      return(retval);
    }

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