* lily/context-specced-music-iterator.cc (class

[lilypond.git] / lily / include / bezier.hh

diff --git a/lily/include/bezier.hh b/lily/include/bezier.hh
index 5f5c59d7b43864ff3b18faa5386babbc1c19ff02..1e79fac676661584b410a065aaec619a8267af8a 100644 (file)
--- a/lily/include/bezier.hh
+++ b/lily/include/bezier.hh
@@ -1,14 +1,20 @@
 /*
   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
@@ -16,37 +22,33 @@
 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>* array, Real xscale, Real yscale);
+void rotate (Array<Offset>* array, Real phi);
+void translate (Array<Offset>* array, Offset o);
 
 #endif // BEZIER_HH
+