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1   /* File SmoothCurve2D.java 
2    *
3    * Project : Java Geometry Library
4    *
5    * ===========================================
6    * 
7    * This library is free software; you can redistribute it and/or modify it 
8    * under the terms of the GNU Lesser General Public License as published by
9    * the Free Software Foundation, either version 2.1 of the License, or (at
10   * your option) any later version.
11   *
12   * This library is distributed in the hope that it will be useful, but 
13   * WITHOUT ANY WARRANTY, without even the implied warranty of MERCHANTABILITY
14   * or FITNESS FOR A PARTICULAR PURPOSE.
15   *
16   * See the GNU Lesser General Public License for more details.
17   *
18   * You should have received a copy of the GNU Lesser General Public License
19   * along with this library. if not, write to :
20   * The Free Software Foundation, Inc., 59 Temple Place, Suite 330,
21   * Boston, MA 02111-1307, USA.
22   */
23  
24  // package
25  
26  package math.geom2d.curve;
27  
28  // Imports
29  import math.geom2d.AffineTransform2D;
30  import math.geom2d.Box2D;
31  import math.geom2d.Vector2D;
32  
33  /**
34   * Interface for smooth and continuous curves. They accept first and second
35   * derivative at every point, and can be drawn with a parametric representation
36   * for every values of t comprised between T0 and T1. Every Curve2D is a
37   * compound of several SmoothCurve2D.
38   */
39  public interface SmoothCurve2D extends ContinuousCurve2D {
40  
41      public abstract Vector2D getTangent(double t);
42  
43      public abstract double getCurvature(double t);
44  
45      public abstract Curve2D getReverseCurve();
46  
47      public abstract Curve2D getSubCurve(double t0, double t1);
48  
49      public abstract CurveSet2D clip(Box2D box);
50  
51      public abstract Curve2D transform(AffineTransform2D trans);
52  }