advance()

void pgplot::Ttext::advance ( const float *  xbox, const float *  ybox, const bool &  nl, const float &  sep  )

private

advance to new reference position

Definition at line 466 of file xpgplotxx.cc.

References Minline, Mjust, Mxnl, Mxref, Mynl, and Myref.

Referenced by print(), and space().

  {
    // infer new refernce position from bounding box
    float dxh=xbox[3]-xbox[0];
    float dyh=ybox[3]-ybox[0];
    float ddh=sqrt(dxh*dxh+dyh*dyh);
    float dxv=xbox[1]-xbox[0];
    float dyv=ybox[1]-ybox[0];
    float ddv=sqrt(dxv*dxv+dyv*dyv);
    dxv+=sep*dxv/ddv;
    dyv+=sep*dyv/ddv;
    dxh+=sep*dxh/ddh;
    dyh+=sep*dyh/ddh;
    if (nl)
    {
      // start at new line position
      if (Minline)
      {
        // we were already within the line -> take prepare reference
        Mxref=Mxnl;
        Myref=Mynl;
      }
      else
      {
        // we did start from the reference position -> shift both
        Mxref=Mxref-dxv;
        Myref=Myref-dyv;
      }
      Mxnl=Mxref-dxv;
      Mynl=Myref-dyv;
      Minline=false;
    }
    else
    {
      // stay in line
      if (!Minline)
      {
        // we did start from newline position -> remember new newline
        Mxnl=Mxref-dxv;
        Mynl=Myref-dyv;
      }
      // find new reference position
      // this will only work with Mjust=0. and Mjust=1.
      Mxref=Mxref+(1.-2.*Mjust)*dxh;
      Myref=Myref+(1.-2.*Mjust)*dyh;
      Minline=true;
    }
  } // Ttext::advance

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