cubiccurve2d.java

gcc的组建

      return ctrlx2;
    }

    /**
     * Returns the <i>y</i> coordinate of the curve&#x2019;s second
     * control point.
     */
    public double getCtrlY2()
    {
      return ctrly2;
    }

    /**
     * Returns the curve&#x2019;s second control point.
     */
    public Point2D getCtrlP2()
    {
      return new Point2D.Double(ctrlx2, ctrly2);
    }

    /**
     * Returns the <i>x</i> coordinate of the curve&#x2019;s end
     * point.
     */
    public double getX2()
    {
      return x2;
    }

    /**
     * Returns the <i>y</i> coordinate of the curve&#x2019;s end
     * point.
     */
    public double getY2()
    {
      return y2;
    }

    /**
     * Returns the curve&#x2019;s end point.
     */
    public Point2D getP2()
    {
      return new Point2D.Double(x2, y2);
    }

    /**
     * Changes the curve geometry, separately specifying each coordinate
     * value.
     *
     * <p><img src="doc-files/CubicCurve2D-1.png" width="350" height="180"
     * alt="A drawing of a CubicCurve2D" />
     *
     * @param x1 the <i>x</i> coordinate of the curve&#x2019;s new start
     * point.
     *
     * @param y1 the <i>y</i> coordinate of the curve&#x2019;s new start
     * point.
     *
     * @param cx1 the <i>x</i> coordinate of the curve&#x2019;s new
     * first control point.
     *
     * @param cy1 the <i>y</i> coordinate of the curve&#x2019;s new
     * first control point.
     *
     * @param cx2 the <i>x</i> coordinate of the curve&#x2019;s new
     * second control point.
     *
     * @param cy2 the <i>y</i> coordinate of the curve&#x2019;s new
     * second control point.
     *
     * @param x2 the <i>x</i> coordinate of the curve&#x2019;s new end
     * point.
     *
     * @param y2 the <i>y</i> coordinate of the curve&#x2019;s new end
     * point.
     */
    public void setCurve(double x1, double y1, double cx1, double cy1,
                         double cx2, double cy2, double x2, double y2)
    {
      this.x1 = x1;
      this.y1 = y1;
      ctrlx1 = cx1;
      ctrly1 = cy1;
      ctrlx2 = cx2;
      ctrly2 = cy2;
      this.x2 = x2;
      this.y2 = y2;
    }

    /**
     * Determines the smallest rectangle that encloses the
     * curve&#x2019;s start, end and control points. As the
     * illustration below shows, the invisible control points may cause
     * the bounds to be much larger than the area that is actually
     * covered by the curve.
     *
     * <p><img src="doc-files/CubicCurve2D-2.png" width="350" height="180"
     * alt="An illustration of the bounds of a CubicCurve2D" />
     */
    public Rectangle2D getBounds2D()
    {
      double nx1 = Math.min(Math.min(x1, ctrlx1), Math.min(ctrlx2, x2));
      double ny1 = Math.min(Math.min(y1, ctrly1), Math.min(ctrly2, y2));
      double nx2 = Math.max(Math.max(x1, ctrlx1), Math.max(ctrlx2, x2));
      double ny2 = Math.max(Math.max(y1, ctrly1), Math.max(ctrly2, y2));
      return new Rectangle2D.Double(nx1, ny1, nx2 - nx1, ny2 - ny1);
    }
  }

  /**
   * A two-dimensional curve that is parameterized with a cubic
   * function and stores coordinate values in single-precision
   * floating-point format.
   *
   * @see CubicCurve2D.Float
   *
   * @author Eric Blake ([e-mail])
   * @author Sascha Brawer ([e-mail])
   */
  public static class Float extends CubicCurve2D
  {
    /**
     * The <i>x</i> coordinate of the curve&#x2019;s start point.
     */
    public float x1;

    /**
     * The <i>y</i> coordinate of the curve&#x2019;s start point.
     */
    public float y1;

    /**
     * The <i>x</i> coordinate of the curve&#x2019;s first control point.
     */
    public float ctrlx1;

    /**
     * The <i>y</i> coordinate of the curve&#x2019;s first control point.
     */
    public float ctrly1;

    /**
     * The <i>x</i> coordinate of the curve&#x2019;s second control point.
     */
    public float ctrlx2;

    /**
     * The <i>y</i> coordinate of the curve&#x2019;s second control point.
     */
    public float ctrly2;

    /**
     * The <i>x</i> coordinate of the curve&#x2019;s end point.
     */
    public float x2;

    /**
     * The <i>y</i> coordinate of the curve&#x2019;s end point.
     */
    public float y2;

    /**
     * Constructs a new CubicCurve2D that stores its coordinate values
     * in single-precision floating-point format. All points are
     * initially at position (0, 0).
     */
    public Float()
    {
    }

    /**
     * Constructs a new CubicCurve2D that stores its coordinate values
     * in single-precision floating-point format, specifying the
     * initial position of each point.
     *
     * <p><img src="doc-files/CubicCurve2D-1.png" width="350" height="180"
     * alt="A drawing of a CubicCurve2D" />
     *
     * @param x1 the <i>x</i> coordinate of the curve&#x2019;s start
     * point.
     *
     * @param y1 the <i>y</i> coordinate of the curve&#x2019;s start
     * point.
     *
     * @param cx1 the <i>x</i> coordinate of the curve&#x2019;s first
     * control point.
     *
     * @param cy1 the <i>y</i> coordinate of the curve&#x2019;s first
     * control point.
     *
     * @param cx2 the <i>x</i> coordinate of the curve&#x2019;s second
     * control point.
     *
     * @param cy2 the <i>y</i> coordinate of the curve&#x2019;s second
     * control point.
     *
     * @param x2 the <i>x</i> coordinate of the curve&#x2019;s end
     * point.
     *
     * @param y2 the <i>y</i> coordinate of the curve&#x2019;s end
     * point.
     */
    public Float(float x1, float y1, float cx1, float cy1, float cx2,
                 float cy2, float x2, float y2)
    {
      this.x1 = x1;
      this.y1 = y1;
      ctrlx1 = cx1;
      ctrly1 = cy1;
      ctrlx2 = cx2;
      ctrly2 = cy2;
      this.x2 = x2;
      this.y2 = y2;
    }

    /**
     * Returns the <i>x</i> coordinate of the curve&#x2019;s start
     * point.
     */
    public double getX1()
    {
      return x1;
    }

    /**
     * Returns the <i>y</i> coordinate of the curve&#x2019;s start
     * point.
     */
    public double getY1()
    {
      return y1;
    }

    /**
     * Returns the curve&#x2019;s start point.
     */
    public Point2D getP1()
    {
      return new Point2D.Float(x1, y1);
    }

    /**
     * Returns the <i>x</i> coordinate of the curve&#x2019;s first
     * control point.
     */
    public double getCtrlX1()
    {
      return ctrlx1;
    }

    /**
     * Returns the <i>y</i> coordinate of the curve&#x2019;s first
     * control point.
     */
    public double getCtrlY1()
    {
      return ctrly1;
    }

    /**
     * Returns the curve&#x2019;s first control point.
     */
    public Point2D getCtrlP1()
    {
      return new Point2D.Float(ctrlx1, ctrly1);
    }

    /**
     * Returns the <i>s</i> coordinate of the curve&#x2019;s second
     * control point.
     */
    public double getCtrlX2()
    {
      return ctrlx2;
    }

    /**
     * Returns the <i>y</i> coordinate of the curve&#x2019;s second
     * control point.
     */
    public double getCtrlY2()
    {
      return ctrly2;
    }

    /**
     * Returns the curve&#x2019;s second control point.
     */
    public Point2D getCtrlP2()
    {
      return new Point2D.Float(ctrlx2, ctrly2);
    }

    /**
     * Returns the <i>x</i> coordinate of the curve&#x2019;s end
     * point.
     */
    public double getX2()
    {
      return x2;
    }

    /**
     * Returns the <i>y</i> coordinate of the curve&#x2019;s end
     * point.
     */
    public double getY2()
    {
      return y2;
    }

    /**
     * Returns the curve&#x2019;s end point.
     */
    public Point2D getP2()
    {
      return new Point2D.Float(x2, y2);
    }

    /**
     * Changes the curve geometry, separately specifying each coordinate
     * value as a double-precision floating-point number.
     *
     * <p><img src="doc-files/CubicCurve2D-1.png" width="350" height="180"
     * alt="A drawing of a CubicCurve2D" />
     *
     * @param x1 the <i>x</i> coordinate of the curve&#x2019;s new start
     * point.
     *
     * @param y1 the <i>y</i> coordinate of the curve&#x2019;s new start
     * point.
     *
     * @param cx1 the <i>x</i> coordinate of the curve&#x2019;s new
     * first control point.
     *
     * @param cy1 the <i>y</i> coordinate of the curve&#x2019;s new
     * first control point.
     *
     * @param cx2 the <i>x</i> coordinate of the curve&#x2019;s new
     * second control point.
     *
     * @param cy2 the <i>y</i> coordinate of the curve&#x2019;s new
     * second control point.
     *
     * @param x2 the <i>x</i> coordinate of the curve&#x2019;s new end
     * point.
     *
     * @param y2 the <i>y</i> coordinate of the curve&#x2019;s new end
     * point.
     */
    public void setCurve(double x1, double y1, double cx1, double cy1,
                         double cx2, double cy2, double x2, double y2)
    {
      this.x1 = (float) x1;
      this.y1 = (float) y1;
      ctrlx1 = (float) cx1;
      ctrly1 = (float) cy1;
      ctrlx2 = (float) cx2;
      ctrly2 = (float) cy2;
      this.x2 = (float) x2;
      this.y2 = (float) y2;
    }

    /**
     * Changes the curve geometry, separately specifying each coordinate
     * value as a single-precision floating-point number.
     *
     * <p><img src="doc-files/CubicCurve2D-1.png" width="350" height="180"
     * alt="A drawing of a CubicCurve2D" />
     *
     * @param x1 the <i>x</i> coordinate of the curve&#x2019;s new start
     * point.
     *
     * @param y1 the <i>y</i> coordinate of the curve&#x2019;s new start
     * point.
     *
     * @param cx1 the <i>x</i> coordinate of the curve&#x2019;s new
     * first control point.
     *
     * @param cy1 the <i>y</i> coordinate of the curve&#x2019;s new
     * first control point.
     *
     * @param cx2 the <i>x</i> coordinate of the curve&#x2019;s new
     * second control point.
     *
     * @param cy2 the <i>y</i> coordinate of the curve&#x2019;s new
     * second control point.
     *
     * @param x2 the <i>x</i> coordinate of the curve&#x2019;s new end
     * point.
     *
     * @param y2 the <i>y</i> coordinate of the curve&#x2019;s new end
     * point.
     */
    public void setCurve(float x1, float y1, float cx1, float cy1, float cx2,
                         float cy2, float x2, float y2)
    {
      this.x1 = x1;
      this.y1 = y1;
      ctrlx1 = cx1;
      ctrly1 = cy1;
      ctrlx2 = cx2;
      ctrly2 = cy2;
      this.x2 = x2;
      this.y2 = y2;
    }

    /**
     * Determines the smallest rectangle that encloses the
     * curve&#x2019;s start, end and control points. As the
     * illustration below shows, the invisible control points may cause
     * the bounds to be much larger than the area that is actually
     * covered by the curve.
     *
     * <p><img src="doc-files/CubicCurve2D-2.png" width="350" height="180"
     * alt="An illustration of the bounds of a CubicCurve2D" />
     */
    public Rectangle2D getBounds2D()
    {
      float nx1 = (float) Math.min(Math.min(x1, ctrlx1), Math.min(ctrlx2, x2));
      float ny1 = (float) Math.min(Math.min(y1, ctrly1), Math.min(ctrly2, y2));
      float nx2 = (float) Math.max(Math.max(x1, ctrlx1), Math.max(ctrlx2, x2));
      float ny2 = (float) Math.max(Math.max(y1, ctrly1), Math.max(ctrly2, y2));
      return new Rectangle2D.Float(nx1, ny1, nx2 - nx1, ny2 - ny1);
    }
  }
}