/*
bezier.hh -- declare Bezier and Bezier_bow
- (c) 1998 Jan Nieuwenhuizen <jan@digicash.com>
+ (c) 1998--2002 Jan Nieuwenhuizen <janneke@gnu.org>
*/
#ifndef BEZIER_HH
#define BEZIER_HH
-#include "lily-proto.hh"
+
#include "real.hh"
+#include "drul-array.hh"
+#include "interval.hh"
+#include "axes.hh"
+#include "offset.hh"
+#include "array.hh"
+#include "polynomial.hh"
/**
Simple bezier curve
class Bezier
{
public:
- Bezier (int steps_i);
- virtual ~Bezier ();
-
- /**
- Calculate bezier curve into Offset (x,y) array.
- */
- void calc (Offset control[4]);
-
- /**
- Return y that goes with x by interpolation.
- */
- Real y (Real x);
-
- int steps_i_;
- Offset* curve_;
-};
-
-/**
- Implement bow specific bezier curve
- */
-class Bezier_bow : public Bezier
-{
-public:
- Bezier_bow (Paper_def* paper_l);
-
- /**
- Calculate bezier curve for bow from bow parameters.
- */
- void calc (Real dx, Real dy, Real h, Real d);
- Paper_def* paper_l_;
+ void assert_sanity () const;
+ void scale (Real x,Real y);
+ void reverse ();
+ void rotate (Real);
+ void translate (Offset);
+
+ Real get_other_coordinate (Axis a, Real x) const;
+ Array<Real> solve_point (Axis, Real coordinate) const;
+ Array<Real> solve_derivative (Offset) const;
+ Interval extent (Axis)const;
+ Polynomial polynomial (Axis)const;
+ Offset curve_point (Real t) const;
+
+ static const int CONTROL_COUNT = 4;
+
+ /*
+ Bezier curves always have 4 control points. Making this into an
+ Array<> gives unnecessary overhead, and makes debugging a royal
+ pain. */
+
+
+ Offset control_[4];
};
+void scale (Array<Offset>* arr_p, Real xscale, Real yscale);
+void rotate (Array<Offset>* arr_p, Real phi);
+void translate (Array<Offset>* arr_p, Offset o);
#endif // BEZIER_HH
+