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Diffstat (limited to 'awt/java/awt/geom/CubicCurve2D.java')
| -rw-r--r-- | awt/java/awt/geom/CubicCurve2D.java | 1047 |
1 files changed, 0 insertions, 1047 deletions
diff --git a/awt/java/awt/geom/CubicCurve2D.java b/awt/java/awt/geom/CubicCurve2D.java deleted file mode 100644 index 1ddedf3..0000000 --- a/awt/java/awt/geom/CubicCurve2D.java +++ /dev/null @@ -1,1047 +0,0 @@ -/* - * Licensed to the Apache Software Foundation (ASF) under one or more - * contributor license agreements. See the NOTICE file distributed with - * this work for additional information regarding copyright ownership. - * The ASF licenses this file to You under the Apache License, Version 2.0 - * (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -/** - * @author Denis M. Kishenko - * @version $Revision$ - */ - -package java.awt.geom; - -import java.awt.Rectangle; -import java.awt.Shape; -import java.util.NoSuchElementException; - -import org.apache.harmony.awt.gl.Crossing; -import org.apache.harmony.awt.internal.nls.Messages; - -/** - * The Class CubicCurve2D is a Shape that represents a segment of a quadratic - * (Bezier) curve. The curved segment is determined by four points: a start - * point, an end point, and two control points. The control points give - * information about the tangent and next derivative at the endpoints according - * to the standard theory of Bezier curves. For more information on Bezier - * curves, see <a href="http://en.wikipedia.org/wiki/B%C3%A9zier_curve">this - * article</a>. - * - * @since Android 1.0 - */ -public abstract class CubicCurve2D implements Shape, Cloneable { - - /** - * The Class Float is the subclass of CubicCurve2D that has all of its data - * values stored with float-level precision. - * - * @since Android 1.0 - */ - public static class Float extends CubicCurve2D { - - /** - * The x coordinate of the starting point. - */ - public float x1; - - /** - * The y coordinate of the starting point. - */ - public float y1; - - /** - * The x coordinate of the first control point. - */ - public float ctrlx1; - - /** - * The y coordinate of the first control point. - */ - public float ctrly1; - - /** - * The x coordinate of the second control point. - */ - public float ctrlx2; - - /** - * The y coordinate of the second control point. - */ - public float ctrly2; - - /** - * The x coordinate of the end point. - */ - public float x2; - - /** - * The y coordinate of the end point. - */ - public float y2; - - /** - * Instantiates a new float-valued CubicCurve2D with all coordinate - * values set to zero. - */ - public Float() { - } - - /** - * Instantiates a new float-valued CubicCurve2D with the specified - * coordinate values. - * - * @param x1 - * the x coordinate of the starting point. - * @param y1 - * the y coordinate of the starting point. - * @param ctrlx1 - * the x coordinate of the first control point. - * @param ctrly1 - * the y coordinate of the first control point. - * @param ctrlx2 - * the x coordinate of the second control point. - * @param ctrly2 - * the y coordinate of the second control point. - * @param x2 - * the x coordinate of the end point. - * @param y2 - * the y coordinate of the end point. - */ - public Float(float x1, float y1, float ctrlx1, float ctrly1, float ctrlx2, float ctrly2, - float x2, float y2) { - setCurve(x1, y1, ctrlx1, ctrly1, ctrlx2, ctrly2, x2, y2); - } - - @Override - public double getX1() { - return x1; - } - - @Override - public double getY1() { - return y1; - } - - @Override - public double getCtrlX1() { - return ctrlx1; - } - - @Override - public double getCtrlY1() { - return ctrly1; - } - - @Override - public double getCtrlX2() { - return ctrlx2; - } - - @Override - public double getCtrlY2() { - return ctrly2; - } - - @Override - public double getX2() { - return x2; - } - - @Override - public double getY2() { - return y2; - } - - @Override - public Point2D getP1() { - return new Point2D.Float(x1, y1); - } - - @Override - public Point2D getCtrlP1() { - return new Point2D.Float(ctrlx1, ctrly1); - } - - @Override - public Point2D getCtrlP2() { - return new Point2D.Float(ctrlx2, ctrly2); - } - - @Override - public Point2D getP2() { - return new Point2D.Float(x2, y2); - } - - @Override - public void setCurve(double x1, double y1, double ctrlx1, double ctrly1, double ctrlx2, - double ctrly2, double x2, double y2) { - this.x1 = (float)x1; - this.y1 = (float)y1; - this.ctrlx1 = (float)ctrlx1; - this.ctrly1 = (float)ctrly1; - this.ctrlx2 = (float)ctrlx2; - this.ctrly2 = (float)ctrly2; - this.x2 = (float)x2; - this.y2 = (float)y2; - } - - /** - * Sets the data values of the curve. - * - * @param x1 - * the x coordinate of the starting point. - * @param y1 - * the y coordinate of the starting point. - * @param ctrlx1 - * the x coordinate of the first control point. - * @param ctrly1 - * the y coordinate of the first control point. - * @param ctrlx2 - * the x coordinate of the second control point. - * @param ctrly2 - * the y coordinate of the second control point. - * @param x2 - * the x coordinate of the end point. - * @param y2 - * the y coordinate of the end point. - */ - public void setCurve(float x1, float y1, float ctrlx1, float ctrly1, float ctrlx2, - float ctrly2, float x2, float y2) { - this.x1 = x1; - this.y1 = y1; - this.ctrlx1 = ctrlx1; - this.ctrly1 = ctrly1; - this.ctrlx2 = ctrlx2; - this.ctrly2 = ctrly2; - this.x2 = x2; - this.y2 = y2; - } - - public Rectangle2D getBounds2D() { - float rx1 = Math.min(Math.min(x1, x2), Math.min(ctrlx1, ctrlx2)); - float ry1 = Math.min(Math.min(y1, y2), Math.min(ctrly1, ctrly2)); - float rx2 = Math.max(Math.max(x1, x2), Math.max(ctrlx1, ctrlx2)); - float ry2 = Math.max(Math.max(y1, y2), Math.max(ctrly1, ctrly2)); - return new Rectangle2D.Float(rx1, ry1, rx2 - rx1, ry2 - ry1); - } - } - - /** - * The Class Double is the subclass of CubicCurve2D that has all of its data - * values stored with double-level precision. - * - * @since Android 1.0 - */ - public static class Double extends CubicCurve2D { - - /** - * The x coordinate of the starting point. - */ - public double x1; - - /** - * The y coordinate of the starting point. - */ - public double y1; - - /** - * The x coordinate of the first control point. - */ - public double ctrlx1; - - /** - * The y coordinate of the first control point. - */ - public double ctrly1; - - /** - * The x coordinate of the second control point. - */ - public double ctrlx2; - - /** - * The y coordinate of the second control point. - */ - public double ctrly2; - - /** - * The x coordinate of the end point. - */ - public double x2; - - /** - * The y coordinate of the end point. - */ - public double y2; - - /** - * Instantiates a new double-valued CubicCurve2D with all coordinate - * values set to zero. - */ - public Double() { - } - - /** - * Instantiates a new double-valued CubicCurve2D with the specified - * coordinate values. - * - * @param x1 - * the x coordinate of the starting point. - * @param y1 - * the y coordinate of the starting point. - * @param ctrlx1 - * the x coordinate of the first control point. - * @param ctrly1 - * the y coordinate of the first control point. - * @param ctrlx2 - * the x coordinate of the second control point. - * @param ctrly2 - * the y coordinate of the second control point. - * @param x2 - * the x coordinate of the end point. - * @param y2 - * the y coordinate of the end point. - */ - public Double(double x1, double y1, double ctrlx1, double ctrly1, double ctrlx2, - double ctrly2, double x2, double y2) { - setCurve(x1, y1, ctrlx1, ctrly1, ctrlx2, ctrly2, x2, y2); - } - - @Override - public double getX1() { - return x1; - } - - @Override - public double getY1() { - return y1; - } - - @Override - public double getCtrlX1() { - return ctrlx1; - } - - @Override - public double getCtrlY1() { - return ctrly1; - } - - @Override - public double getCtrlX2() { - return ctrlx2; - } - - @Override - public double getCtrlY2() { - return ctrly2; - } - - @Override - public double getX2() { - return x2; - } - - @Override - public double getY2() { - return y2; - } - - @Override - public Point2D getP1() { - return new Point2D.Double(x1, y1); - } - - @Override - public Point2D getCtrlP1() { - return new Point2D.Double(ctrlx1, ctrly1); - } - - @Override - public Point2D getCtrlP2() { - return new Point2D.Double(ctrlx2, ctrly2); - } - - @Override - public Point2D getP2() { - return new Point2D.Double(x2, y2); - } - - @Override - public void setCurve(double x1, double y1, double ctrlx1, double ctrly1, double ctrlx2, - double ctrly2, double x2, double y2) { - this.x1 = x1; - this.y1 = y1; - this.ctrlx1 = ctrlx1; - this.ctrly1 = ctrly1; - this.ctrlx2 = ctrlx2; - this.ctrly2 = ctrly2; - this.x2 = x2; - this.y2 = y2; - } - - public Rectangle2D getBounds2D() { - double rx1 = Math.min(Math.min(x1, x2), Math.min(ctrlx1, ctrlx2)); - double ry1 = Math.min(Math.min(y1, y2), Math.min(ctrly1, ctrly2)); - double rx2 = Math.max(Math.max(x1, x2), Math.max(ctrlx1, ctrlx2)); - double ry2 = Math.max(Math.max(y1, y2), Math.max(ctrly1, ctrly2)); - return new Rectangle2D.Double(rx1, ry1, rx2 - rx1, ry2 - ry1); - } - } - - /* - * CubicCurve2D path iterator - */ - /** - * The Iterator class for the Shape CubicCurve2D. - */ - class Iterator implements PathIterator { - - /** - * The source CubicCurve2D object. - */ - CubicCurve2D c; - - /** - * The path iterator transformation. - */ - AffineTransform t; - - /** - * The current segment index. - */ - int index; - - /** - * Constructs a new CubicCurve2D.Iterator for given line and - * transformation - * - * @param c - * the source CubicCurve2D object. - * @param t - * the affine transformation object. - */ - Iterator(CubicCurve2D c, AffineTransform t) { - this.c = c; - this.t = t; - } - - public int getWindingRule() { - return WIND_NON_ZERO; - } - - public boolean isDone() { - return index > 1; - } - - public void next() { - index++; - } - - public int currentSegment(double[] coords) { - if (isDone()) { - throw new NoSuchElementException(Messages.getString("awt.4B")); //$NON-NLS-1$ - } - int type; - int count; - if (index == 0) { - type = SEG_MOVETO; - coords[0] = c.getX1(); - coords[1] = c.getY1(); - count = 1; - } else { - type = SEG_CUBICTO; - coords[0] = c.getCtrlX1(); - coords[1] = c.getCtrlY1(); - coords[2] = c.getCtrlX2(); - coords[3] = c.getCtrlY2(); - coords[4] = c.getX2(); - coords[5] = c.getY2(); - count = 3; - } - if (t != null) { - t.transform(coords, 0, coords, 0, count); - } - return type; - } - - public int currentSegment(float[] coords) { - if (isDone()) { - throw new NoSuchElementException(Messages.getString("awt.4B")); //$NON-NLS-1$ - } - int type; - int count; - if (index == 0) { - type = SEG_MOVETO; - coords[0] = (float)c.getX1(); - coords[1] = (float)c.getY1(); - count = 1; - } else { - type = SEG_CUBICTO; - coords[0] = (float)c.getCtrlX1(); - coords[1] = (float)c.getCtrlY1(); - coords[2] = (float)c.getCtrlX2(); - coords[3] = (float)c.getCtrlY2(); - coords[4] = (float)c.getX2(); - coords[5] = (float)c.getY2(); - count = 3; - } - if (t != null) { - t.transform(coords, 0, coords, 0, count); - } - return type; - } - - } - - /** - * Instantiates a new 2-D cubic curve. - */ - protected CubicCurve2D() { - } - - /** - * Gets the x coordinate of the starting point. - * - * @return the x coordinate of the starting point. - */ - public abstract double getX1(); - - /** - * Gets the y coordinate of the starting point. - * - * @return the y coordinate of the starting point. - */ - public abstract double getY1(); - - /** - * Gets the starting point. - * - * @return the starting point. - */ - public abstract Point2D getP1(); - - /** - * Gets the x coordinate of the first control point. - * - * @return the x coordinate of the first control point. - */ - public abstract double getCtrlX1(); - - /** - * Gets the y coordinate of the first control point. - * - * @return the y coordinate of the first control point. - */ - public abstract double getCtrlY1(); - - /** - * Gets the second control point. - * - * @return the second control point. - */ - public abstract Point2D getCtrlP1(); - - /** - * Gets the x coordinate of the second control point. - * - * @return the x coordinate of the second control point - */ - public abstract double getCtrlX2(); - - /** - * Gets the y coordinate of the second control point. - * - * @return the y coordinate of the second control point - */ - public abstract double getCtrlY2(); - - /** - * Gets the second control point. - * - * @return the second control point. - */ - public abstract Point2D getCtrlP2(); - - /** - * Gets the x coordinate of the end point. - * - * @return the x coordinate of the end point. - */ - public abstract double getX2(); - - /** - * Gets the y coordinate of the end point. - * - * @return the y coordinate of the end point. - */ - public abstract double getY2(); - - /** - * Gets the end point. - * - * @return the end point. - */ - public abstract Point2D getP2(); - - /** - * Sets the data of the curve. - * - * @param x1 - * the x coordinate of the starting point. - * @param y1 - * the y coordinate of the starting point. - * @param ctrlx1 - * the x coordinate of the first control point. - * @param ctrly1 - * the y coordinate of the first control point. - * @param ctrlx2 - * the x coordinate of the second control point. - * @param ctrly2 - * the y coordinate of the second control point. - * @param x2 - * the x coordinate of the end point. - * @param y2 - * the y coordinate of the end point. - */ - public abstract void setCurve(double x1, double y1, double ctrlx1, double ctrly1, - double ctrlx2, double ctrly2, double x2, double y2); - - /** - * Sets the data of the curve as point objects. - * - * @param p1 - * the starting point. - * @param cp1 - * the first control point. - * @param cp2 - * the second control point. - * @param p2 - * the end point. - * @throws NullPointerException - * if any of the points is null. - */ - public void setCurve(Point2D p1, Point2D cp1, Point2D cp2, Point2D p2) { - setCurve(p1.getX(), p1.getY(), cp1.getX(), cp1.getY(), cp2.getX(), cp2.getY(), p2.getX(), - p2.getY()); - } - - /** - * Sets the data of the curve by reading the data from an array of values. - * The values are read in the same order as the arguments of the method - * {@link CubicCurve2D#setCurve(double, double, double, double, double, double, double, double)} - * . - * - * @param coords - * the array of values containing the new coordinates. - * @param offset - * the offset of the data to read within the array. - * @throws ArrayIndexOutOfBoundsException - * if {@code coords.length} < offset + 8. - * @throws NullPointerException - * if the coordinate array is null. - */ - public void setCurve(double[] coords, int offset) { - setCurve(coords[offset + 0], coords[offset + 1], coords[offset + 2], coords[offset + 3], - coords[offset + 4], coords[offset + 5], coords[offset + 6], coords[offset + 7]); - } - - /** - * Sets the data of the curve by reading the data from an array of points. - * The values are read in the same order as the arguments of the method - * {@link CubicCurve2D#setCurve(Point2D, Point2D, Point2D, Point2D)} - * - * @param points - * the array of points containing the new coordinates. - * @param offset - * the offset of the data to read within the array. - * @throws ArrayIndexOutOfBoundsException - * if {@code points.length} < offset + . - * @throws NullPointerException - * if the point array is null. - */ - public void setCurve(Point2D[] points, int offset) { - setCurve(points[offset + 0].getX(), points[offset + 0].getY(), points[offset + 1].getX(), - points[offset + 1].getY(), points[offset + 2].getX(), points[offset + 2].getY(), - points[offset + 3].getX(), points[offset + 3].getY()); - } - - /** - * Sets the data of the curve by copying it from another CubicCurve2D. - * - * @param curve - * the curve to copy the data points from. - * @throws NullPointerException - * if the curve is null. - */ - public void setCurve(CubicCurve2D curve) { - setCurve(curve.getX1(), curve.getY1(), curve.getCtrlX1(), curve.getCtrlY1(), curve - .getCtrlX2(), curve.getCtrlY2(), curve.getX2(), curve.getY2()); - } - - /** - * Gets the square of the flatness of this curve, where the flatness is the - * maximum distance from the curves control points to the line segment - * connecting the two points. - * - * @return the square of the flatness. - */ - public double getFlatnessSq() { - return getFlatnessSq(getX1(), getY1(), getCtrlX1(), getCtrlY1(), getCtrlX2(), getCtrlY2(), - getX2(), getY2()); - } - - /** - * Gets the square of the flatness of the cubic curve segment defined by the - * specified values. - * - * @param x1 - * the x coordinate of the starting point. - * @param y1 - * the y coordinate of the starting point. - * @param ctrlx1 - * the x coordinate of the first control point. - * @param ctrly1 - * the y coordinate of the first control point. - * @param ctrlx2 - * the x coordinate of the second control point. - * @param ctrly2 - * the y coordinate of the second control point. - * @param x2 - * the x coordinate of the end point. - * @param y2 - * the y coordinate of the end point. - * @return the square of the flatness. - */ - public static double getFlatnessSq(double x1, double y1, double ctrlx1, double ctrly1, - double ctrlx2, double ctrly2, double x2, double y2) { - return Math.max(Line2D.ptSegDistSq(x1, y1, x2, y2, ctrlx1, ctrly1), Line2D.ptSegDistSq(x1, - y1, x2, y2, ctrlx2, ctrly2)); - } - - /** - * Gets the square of the flatness of the cubic curve segment defined by the - * specified values. The values are read in the same order as the arguments - * of the method - * {@link CubicCurve2D#getFlatnessSq(double, double, double, double, double, double, double, double)} - * . - * - * @param coords - * the array of points containing the new coordinates. - * @param offset - * the offset of the data to read within the array. - * @return the square of the flatness. - * @throws ArrayIndexOutOfBoundsException - * if points.length < offset + . - * @throws NullPointerException - * if the point array is null. - */ - public static double getFlatnessSq(double coords[], int offset) { - return getFlatnessSq(coords[offset + 0], coords[offset + 1], coords[offset + 2], - coords[offset + 3], coords[offset + 4], coords[offset + 5], coords[offset + 6], - coords[offset + 7]); - } - - /** - * Gets the flatness of this curve, where the flatness is the maximum - * distance from the curves control points to the line segment connecting - * the two points. - * - * @return the flatness of this curve. - */ - public double getFlatness() { - return getFlatness(getX1(), getY1(), getCtrlX1(), getCtrlY1(), getCtrlX2(), getCtrlY2(), - getX2(), getY2()); - } - - /** - * Gets the flatness of the cubic curve segment defined by the specified - * values. - * - * @param x1 - * the x coordinate of the starting point. - * @param y1 - * the y coordinate of the starting point. - * @param ctrlx1 - * the x coordinate of the first control point. - * @param ctrly1 - * the y coordinate of the first control point. - * @param ctrlx2 - * the x coordinate of the second control point. - * @param ctrly2 - * the y coordinate of the second control point. - * @param x2 - * the x coordinate of the end point. - * @param y2 - * the y coordinate of the end point. - * @return the flatness. - */ - public static double getFlatness(double x1, double y1, double ctrlx1, double ctrly1, - double ctrlx2, double ctrly2, double x2, double y2) { - return Math.sqrt(getFlatnessSq(x1, y1, ctrlx1, ctrly1, ctrlx2, ctrly2, x2, y2)); - } - - /** - * Gets the flatness of the cubic curve segment defined by the specified - * values. The values are read in the same order as the arguments of the - * method - * {@link CubicCurve2D#getFlatness(double, double, double, double, double, double, double, double)} - * . - * - * @param coords - * the array of points containing the new coordinates. - * @param offset - * the offset of the data to read within the array. - * @return the flatness. - * @throws ArrayIndexOutOfBoundsException - * if points.length < offset + . - * @throws NullPointerException - * if the point array is null. - */ - public static double getFlatness(double coords[], int offset) { - return getFlatness(coords[offset + 0], coords[offset + 1], coords[offset + 2], - coords[offset + 3], coords[offset + 4], coords[offset + 5], coords[offset + 6], - coords[offset + 7]); - } - - /** - * Creates the data for two cubic curves by dividing this curve in two. The - * division point is the point on the curve that is closest to the average - * of curve's two control points. The two new control points (nearest the - * new endpoint) are computed by averaging the original control points with - * the new endpoint. The data of this curve is left unchanged. - * - * @param left - * the CubicCurve2D where the left (start) segment's data is - * written. - * @param right - * the CubicCurve2D where the right (end) segment's data is - * written. - * @throws NullPointerException - * if either curve is null. - */ - public void subdivide(CubicCurve2D left, CubicCurve2D right) { - subdivide(this, left, right); - } - - /** - * Creates the data for two cubic curves by dividing the specified curve in - * two. The division point is the point on the curve that is closest to the - * average of curve's two control points. The two new control points - * (nearest the new endpoint) are computed by averaging the original control - * points with the new endpoint. The data of the source curve is left - * unchanged. - * - * @param src - * the original curve to be divided in two. - * @param left - * the CubicCurve2D where the left (start) segment's data is - * written. - * @param right - * the CubicCurve2D where the right (end) segment's data is - * written. - * @throws NullPointerException - * if either curve is null. - */ - public static void subdivide(CubicCurve2D src, CubicCurve2D left, CubicCurve2D right) { - double x1 = src.getX1(); - double y1 = src.getY1(); - double cx1 = src.getCtrlX1(); - double cy1 = src.getCtrlY1(); - double cx2 = src.getCtrlX2(); - double cy2 = src.getCtrlY2(); - double x2 = src.getX2(); - double y2 = src.getY2(); - double cx = (cx1 + cx2) / 2.0; - double cy = (cy1 + cy2) / 2.0; - cx1 = (x1 + cx1) / 2.0; - cy1 = (y1 + cy1) / 2.0; - cx2 = (x2 + cx2) / 2.0; - cy2 = (y2 + cy2) / 2.0; - double ax = (cx1 + cx) / 2.0; - double ay = (cy1 + cy) / 2.0; - double bx = (cx2 + cx) / 2.0; - double by = (cy2 + cy) / 2.0; - cx = (ax + bx) / 2.0; - cy = (ay + by) / 2.0; - if (left != null) { - left.setCurve(x1, y1, cx1, cy1, ax, ay, cx, cy); - } - if (right != null) { - right.setCurve(cx, cy, bx, by, cx2, cy2, x2, y2); - } - } - - /** - * Creates the data for two cubic curves by dividing the specified curve in - * two. The division point is the point on the curve that is closest to the - * average of curve's two control points. The two new control points - * (nearest the new endpoint) are computed by averaging the original control - * points with the new endpoint. The data of the source curve is left - * unchanged. The data for the three curves is read/written in the usual - * order: { x1, y1, ctrlx1, ctrly1, ctrlx2, crtry2, x2, y3 } - * - * @param src - * the array that gives the data values for the source curve. - * @param srcOff - * the offset in the src array to read the values from. - * @param left - * the array where the coordinates of the start curve should be - * written. - * @param leftOff - * the offset in the left array to start writing the values. - * @param right - * the array where the coordinates of the end curve should be - * written. - * @param rightOff - * the offset in the right array to start writing the values. - * @throws ArrayIndexOutOfBoundsException - * if src.length < srcoff + 8 or if left.length < leftOff + 8 or - * if right.length < rightOff + 8. - * @throws NullPointerException - * if one of the arrays is null. - */ - public static void subdivide(double src[], int srcOff, double left[], int leftOff, - double right[], int rightOff) { - double x1 = src[srcOff + 0]; - double y1 = src[srcOff + 1]; - double cx1 = src[srcOff + 2]; - double cy1 = src[srcOff + 3]; - double cx2 = src[srcOff + 4]; - double cy2 = src[srcOff + 5]; - double x2 = src[srcOff + 6]; - double y2 = src[srcOff + 7]; - double cx = (cx1 + cx2) / 2.0; - double cy = (cy1 + cy2) / 2.0; - cx1 = (x1 + cx1) / 2.0; - cy1 = (y1 + cy1) / 2.0; - cx2 = (x2 + cx2) / 2.0; - cy2 = (y2 + cy2) / 2.0; - double ax = (cx1 + cx) / 2.0; - double ay = (cy1 + cy) / 2.0; - double bx = (cx2 + cx) / 2.0; - double by = (cy2 + cy) / 2.0; - cx = (ax + bx) / 2.0; - cy = (ay + by) / 2.0; - if (left != null) { - left[leftOff + 0] = x1; - left[leftOff + 1] = y1; - left[leftOff + 2] = cx1; - left[leftOff + 3] = cy1; - left[leftOff + 4] = ax; - left[leftOff + 5] = ay; - left[leftOff + 6] = cx; - left[leftOff + 7] = cy; - } - if (right != null) { - right[rightOff + 0] = cx; - right[rightOff + 1] = cy; - right[rightOff + 2] = bx; - right[rightOff + 3] = by; - right[rightOff + 4] = cx2; - right[rightOff + 5] = cy2; - right[rightOff + 6] = x2; - right[rightOff + 7] = y2; - } - } - - /** - * Finds the roots of the cubic polynomial. This is accomplished by finding - * the (real) values of x that solve the following equation: eqn[3]*x*x*x + - * eqn[2]*x*x + eqn[1]*x + eqn[0] = 0. The solutions are written back into - * the array eqn starting from the index 0 in the array. The return value - * tells how many array elements have been changed by this method call. - * - * @param eqn - * an array containing the coefficients of the cubic polynomial - * to solve. - * @return the number of roots of the cubic polynomial. - * @throws ArrayIndexOutOfBoundsException - * if eqn.length < 4. - * @throws NullPointerException - * if the array is null. - */ - public static int solveCubic(double eqn[]) { - return solveCubic(eqn, eqn); - } - - /** - * Finds the roots of the cubic polynomial. This is accomplished by finding - * the (real) values of x that solve the following equation: eqn[3]*x*x*x + - * eqn[2]*x*x + eqn[1]*x + eqn[0] = 0. The solutions are written into the - * array res starting from the index 0 in the array. The return value tells - * how many array elements have been changed by this method call. - * - * @param eqn - * an array containing the coefficients of the cubic polynomial - * to solve. - * @param res - * the array that this method writes the results into. - * @return the number of roots of the cubic polynomial. - * @throws ArrayIndexOutOfBoundsException - * if eqn.length < 4 or if res.length is less than the number of - * roots. - * @throws NullPointerException - * if either array is null. - */ - public static int solveCubic(double eqn[], double res[]) { - return Crossing.solveCubic(eqn, res); - } - - public boolean contains(double px, double py) { - return Crossing.isInsideEvenOdd(Crossing.crossShape(this, px, py)); - } - - public boolean contains(double rx, double ry, double rw, double rh) { - int cross = Crossing.intersectShape(this, rx, ry, rw, rh); - return cross != Crossing.CROSSING && Crossing.isInsideEvenOdd(cross); - } - - public boolean intersects(double rx, double ry, double rw, double rh) { - int cross = Crossing.intersectShape(this, rx, ry, rw, rh); - return cross == Crossing.CROSSING || Crossing.isInsideEvenOdd(cross); - } - - public boolean contains(Point2D p) { - return contains(p.getX(), p.getY()); - } - - public boolean intersects(Rectangle2D r) { - return intersects(r.getX(), r.getY(), r.getWidth(), r.getHeight()); - } - - public boolean contains(Rectangle2D r) { - return contains(r.getX(), r.getY(), r.getWidth(), r.getHeight()); - } - - public Rectangle getBounds() { - return getBounds2D().getBounds(); - } - - public PathIterator getPathIterator(AffineTransform t) { - return new Iterator(this, t); - } - - public PathIterator getPathIterator(AffineTransform at, double flatness) { - return new FlatteningPathIterator(getPathIterator(at), flatness); - } - - @Override - public Object clone() { - try { - return super.clone(); - } catch (CloneNotSupportedException e) { - throw new InternalError(); - } - } -}
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