vcl/source/filter/sgvspln.hxx

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   9  * This file incorporates work covered by the following license notice:
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  19
  20 #ifndef INCLUDED_VCL_SOURCE_FILTER_SGVSPLN_HXX
  21 #define INCLUDED_VCL_SOURCE_FILTER_SGVSPLN_HXX
  22
  23 /*
  24  * Calculates the coefficients of parametrised natural or periodic cubic
  25  * polynom-splines. The corner points of the polygon passed are used as
  26  * support points. n returns the number of partial polynoms. This function
  27  * returns TRUE if no error occurred. Only in this case memory for the
  28  * coefficient array has been allocated, which can be freed by the caller
  29  * using a delete.
  30  */
  31 bool CalcSpline(Polygon& rPoly, bool Periodic, sal_uInt16& n,
  32                 double*& ax, double*& ay, double*& bx, double*& by,
  33                 double*& cx, double*& cy, double*& dx, double*& dy, double*& T);
  34
  35 /*
  36  * Converts a parametrised cubic spline (natural or periodic) to an approximate
  37  * polygon. The function returns false, if an error occurred during the
  38  * calculation of the coefficients or the polygon became too large (>PolyMax=16380).
  39  * In the first case the polygon has 0, in the second case PolyMax points.
  40  * To prevent coordinate overflows we limit them to +/-32000.
  41  */
  42 bool Spline2Poly(Polygon& rSpln, bool Periodic, Polygon& rPoly);
  43
  44 #endif // INCLUDED_VCL_SOURCE_FILTER_SGVSPLN_HXX
  45
  46 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */