/*
* Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package org.geogebra.ggbjdk.java.awt.geom;
import static java.lang.Math.max;
import org.geogebra.common.awt.GAffineTransform;
import org.geogebra.common.awt.GPathIterator;
import org.geogebra.common.awt.GRectangle;
import org.geogebra.common.awt.GRectangle2D;
import org.geogebra.common.awt.GShape;
import org.geogebra.ggbjdk.sun.awt.geom.Curve;
/**
* The <code>CubicCurve2D</code> class defines a cubic parametric curve
* segment in {@code (x,y)} coordinate space.
* <p>
* This class is only the abstract superclass for all objects which
* store a 2D cubic curve segment.
* The actual storage representation of the coordinates is left to
* the subclass.
*
* @author Jim Graham
* @since 1.2
*/
public abstract class CubicCurve2D implements GShape {
/**
* A cubic parametric curve segment specified with
* {@code double} coordinates.
* @since 1.2
*/
public static class Double extends CubicCurve2D {
/**
* The X coordinate of the start point
* of the cubic curve segment.
* @since 1.2
*
*/
public double x1;
/**
* The Y coordinate of the start point
* of the cubic curve segment.
* @since 1.2
*
*/
public double y1;
/**
* The X coordinate of the first control point
* of the cubic curve segment.
* @since 1.2
*
*/
public double ctrlx1;
/**
* The Y coordinate of the first control point
* of the cubic curve segment.
* @since 1.2
*
*/
public double ctrly1;
/**
* The X coordinate of the second control point
* of the cubic curve segment.
* @since 1.2
*
*/
public double ctrlx2;
/**
* The Y coordinate of the second control point
* of the cubic curve segment.
* @since 1.2
*
*/
public double ctrly2;
/**
* The X coordinate of the end point
* of the cubic curve segment.
* @since 1.2
*
*/
public double x2;
/**
* The Y coordinate of the end point
* of the cubic curve segment.
* @since 1.2
*
*/
public double y2;
/**
* Constructs and initializes a CubicCurve with coordinates
* (0, 0, 0, 0, 0, 0, 0, 0).
* @since 1.2
*/
public Double() {
}
/**
* Constructs and initializes a {@code CubicCurve2D} from
* the specified {@code double} coordinates.
*
* @param x1 the X coordinate for the start point
* of the resulting {@code CubicCurve2D}
* @param y1 the Y coordinate for the start point
* of the resulting {@code CubicCurve2D}
* @param ctrlx1 the X coordinate for the first control point
* of the resulting {@code CubicCurve2D}
* @param ctrly1 the Y coordinate for the first control point
* of the resulting {@code CubicCurve2D}
* @param ctrlx2 the X coordinate for the second control point
* of the resulting {@code CubicCurve2D}
* @param ctrly2 the Y coordinate for the second control point
* of the resulting {@code CubicCurve2D}
* @param x2 the X coordinate for the end point
* of the resulting {@code CubicCurve2D}
* @param y2 the Y coordinate for the end point
* of the resulting {@code CubicCurve2D}
* @since 1.2
*/
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);
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public double getX1() {
return x1;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public double getY1() {
return y1;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public Point2D getP1() {
return new Point2D.Double(x1, y1);
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public double getCtrlX1() {
return ctrlx1;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public double getCtrlY1() {
return ctrly1;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public Point2D getCtrlP1() {
return new Point2D.Double(ctrlx1, ctrly1);
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public double getCtrlX2() {
return ctrlx2;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public double getCtrlY2() {
return ctrly2;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public Point2D getCtrlP2() {
return new Point2D.Double(ctrlx2, ctrly2);
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public double getX2() {
return x2;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public double getY2() {
return y2;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public Point2D getP2() {
return new Point2D.Double(x2, y2);
}
/**
* {@inheritDoc}
* @since 1.2
*/
@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;
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public GRectangle2D getBounds2D() {
double left = Math.min(Math.min(x1, x2),
Math.min(ctrlx1, ctrlx2));
double top = Math.min(Math.min(y1, y2),
Math.min(ctrly1, ctrly2));
double right = max(max(x1, x2), max(ctrlx1, ctrlx2));
double bottom = max(max(y1, y2), max(ctrly1, ctrly2));
return new Rectangle2D.Double(left, top,
right - left, bottom - top);
}
}
/**
* This is an abstract class that cannot be instantiated directly.
* Type-specific implementation subclasses are available for
* instantiation and provide a number of formats for storing
* the information necessary to satisfy the various accessor
* methods below.
*
* @see java.awt.geom.CubicCurve2D.Float
* @see java.awt.geom.CubicCurve2D.Double
* @since 1.2
*/
protected CubicCurve2D() {
}
/**
* Returns the X coordinate of the start point in double precision.
* @return the X coordinate of the start point of the
* {@code CubicCurve2D}.
* @since 1.2
*/
public abstract double getX1();
/**
* Returns the Y coordinate of the start point in double precision.
* @return the Y coordinate of the start point of the
* {@code CubicCurve2D}.
* @since 1.2
*/
public abstract double getY1();
/**
* Returns the start point.
* @return a {@code Point2D} that is the start point of
* the {@code CubicCurve2D}.
* @since 1.2
*/
public abstract Point2D getP1();
/**
* Returns the X coordinate of the first control point in double precision.
* @return the X coordinate of the first control point of the
* {@code CubicCurve2D}.
* @since 1.2
*/
public abstract double getCtrlX1();
/**
* Returns the Y coordinate of the first control point in double precision.
* @return the Y coordinate of the first control point of the
* {@code CubicCurve2D}.
* @since 1.2
*/
public abstract double getCtrlY1();
/**
* Returns the first control point.
* @return a {@code Point2D} that is the first control point of
* the {@code CubicCurve2D}.
* @since 1.2
*/
public abstract Point2D getCtrlP1();
/**
* Returns the X coordinate of the second control point
* in double precision.
* @return the X coordinate of the second control point of the
* {@code CubicCurve2D}.
* @since 1.2
*/
public abstract double getCtrlX2();
/**
* Returns the Y coordinate of the second control point
* in double precision.
* @return the Y coordinate of the second control point of the
* {@code CubicCurve2D}.
* @since 1.2
*/
public abstract double getCtrlY2();
/**
* Returns the second control point.
* @return a {@code Point2D} that is the second control point of
* the {@code CubicCurve2D}.
* @since 1.2
*/
public abstract Point2D getCtrlP2();
/**
* Returns the X coordinate of the end point in double precision.
* @return the X coordinate of the end point of the
* {@code CubicCurve2D}.
* @since 1.2
*/
public abstract double getX2();
/**
* Returns the Y coordinate of the end point in double precision.
* @return the Y coordinate of the end point of the
* {@code CubicCurve2D}.
* @since 1.2
*/
public abstract double getY2();
/**
* Returns the end point.
* @return a {@code Point2D} that is the end point of
* the {@code CubicCurve2D}.
* @since 1.2
*/
public abstract Point2D getP2();
/**
* Sets the location of the end points and control points of this curve
* to the specified double coordinates.
*
* @param x1 the X coordinate used to set the start point
* of this {@code CubicCurve2D}
* @param y1 the Y coordinate used to set the start point
* of this {@code CubicCurve2D}
* @param ctrlx1 the X coordinate used to set the first control point
* of this {@code CubicCurve2D}
* @param ctrly1 the Y coordinate used to set the first control point
* of this {@code CubicCurve2D}
* @param ctrlx2 the X coordinate used to set the second control point
* of this {@code CubicCurve2D}
* @param ctrly2 the Y coordinate used to set the second control point
* of this {@code CubicCurve2D}
* @param x2 the X coordinate used to set the end point
* of this {@code CubicCurve2D}
* @param y2 the Y coordinate used to set the end point
* of this {@code CubicCurve2D}
* @since 1.2
*/
public abstract void setCurve(double x1, double y1,
double ctrlx1, double ctrly1,
double ctrlx2, double ctrly2,
double x2, double y2);
/**
* Sets the location of the end points and control points of this curve
* to the double coordinates at the specified offset in the specified
* array.
* @param coords a double array containing coordinates
* @param offset the index of <code>coords</code> from which to begin
* setting the end points and control points of this curve
* to the coordinates contained in <code>coords</code>
* @since 1.2
*/
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 location of the end points and control points of this curve
* to the specified <code>Point2D</code> coordinates.
* @param p1 the first specified <code>Point2D</code> used to set the
* start point of this curve
* @param cp1 the second specified <code>Point2D</code> used to set the
* first control point of this curve
* @param cp2 the third specified <code>Point2D</code> used to set the
* second control point of this curve
* @param p2 the fourth specified <code>Point2D</code> used to set the
* end point of this curve
* @since 1.2
*/
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 location of the end points and control points of this curve
* to the coordinates of the <code>Point2D</code> objects at the specified
* offset in the specified array.
* @param pts an array of <code>Point2D</code> objects
* @param offset the index of <code>pts</code> from which to begin setting
* the end points and control points of this curve to the
* points contained in <code>pts</code>
* @since 1.2
*/
public void setCurve(Point2D[] pts, int offset) {
setCurve(pts[offset + 0].getX(), pts[offset + 0].getY(),
pts[offset + 1].getX(), pts[offset + 1].getY(),
pts[offset + 2].getX(), pts[offset + 2].getY(),
pts[offset + 3].getX(), pts[offset + 3].getY());
}
/**
* Sets the location of the end points and control points of this curve
* to the same as those in the specified <code>CubicCurve2D</code>.
* @param c the specified <code>CubicCurve2D</code>
* @since 1.2
*/
public void setCurve(CubicCurve2D c) {
setCurve(c.getX1(), c.getY1(), c.getCtrlX1(), c.getCtrlY1(),
c.getCtrlX2(), c.getCtrlY2(), c.getX2(), c.getY2());
}
/**
* Returns the square of the flatness of the cubic curve specified
* by the indicated control points. The flatness is the maximum distance
* of a control point from the line connecting the end points.
*
* @param x1 the X coordinate that specifies the start point
* of a {@code CubicCurve2D}
* @param y1 the Y coordinate that specifies the start point
* of a {@code CubicCurve2D}
* @param ctrlx1 the X coordinate that specifies the first control point
* of a {@code CubicCurve2D}
* @param ctrly1 the Y coordinate that specifies the first control point
* of a {@code CubicCurve2D}
* @param ctrlx2 the X coordinate that specifies the second control point
* of a {@code CubicCurve2D}
* @param ctrly2 the Y coordinate that specifies the second control point
* of a {@code CubicCurve2D}
* @param x2 the X coordinate that specifies the end point
* of a {@code CubicCurve2D}
* @param y2 the Y coordinate that specifies the end point
* of a {@code CubicCurve2D}
* @return the square of the flatness of the {@code CubicCurve2D}
* represented by the specified coordinates.
* @since 1.2
*/
public static double getFlatnessSq(double x1, double y1,
double ctrlx1, double ctrly1,
double ctrlx2, double ctrly2,
double x2, double y2) {
return max(Line2D.ptSegDistSq(x1, y1, x2, y2, ctrlx1, ctrly1),
Line2D.ptSegDistSq(x1, y1, x2, y2, ctrlx2, ctrly2));
}
/**
* Returns the flatness of the cubic curve specified
* by the indicated control points. The flatness is the maximum distance
* of a control point from the line connecting the end points.
*
* @param x1 the X coordinate that specifies the start point
* of a {@code CubicCurve2D}
* @param y1 the Y coordinate that specifies the start point
* of a {@code CubicCurve2D}
* @param ctrlx1 the X coordinate that specifies the first control point
* of a {@code CubicCurve2D}
* @param ctrly1 the Y coordinate that specifies the first control point
* of a {@code CubicCurve2D}
* @param ctrlx2 the X coordinate that specifies the second control point
* of a {@code CubicCurve2D}
* @param ctrly2 the Y coordinate that specifies the second control point
* of a {@code CubicCurve2D}
* @param x2 the X coordinate that specifies the end point
* of a {@code CubicCurve2D}
* @param y2 the Y coordinate that specifies the end point
* of a {@code CubicCurve2D}
* @return the flatness of the {@code CubicCurve2D}
* represented by the specified coordinates.
* @since 1.2
*/
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));
}
/**
* Returns the square of the flatness of the cubic curve specified
* by the control points stored in the indicated array at the
* indicated index. The flatness is the maximum distance
* of a control point from the line connecting the end points.
* @param coords an array containing coordinates
* @param offset the index of <code>coords</code> from which to begin
* getting the end points and control points of the curve
* @return the square of the flatness of the <code>CubicCurve2D</code>
* specified by the coordinates in <code>coords</code> at
* the specified offset.
* @since 1.2
*/
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]);
}
/**
* Returns the flatness of the cubic curve specified
* by the control points stored in the indicated array at the
* indicated index. The flatness is the maximum distance
* of a control point from the line connecting the end points.
* @param coords an array containing coordinates
* @param offset the index of <code>coords</code> from which to begin
* getting the end points and control points of the curve
* @return the flatness of the <code>CubicCurve2D</code>
* specified by the coordinates in <code>coords</code> at
* the specified offset.
* @since 1.2
*/
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]);
}
/**
* Returns the square of the flatness of this curve. The flatness is the
* maximum distance of a control point from the line connecting the
* end points.
* @return the square of the flatness of this curve.
* @since 1.2
*/
public double getFlatnessSq() {
return getFlatnessSq(getX1(), getY1(), getCtrlX1(), getCtrlY1(),
getCtrlX2(), getCtrlY2(), getX2(), getY2());
}
/**
* Returns the flatness of this curve. The flatness is the
* maximum distance of a control point from the line connecting the
* end points.
* @return the flatness of this curve.
* @since 1.2
*/
public double getFlatness() {
return getFlatness(getX1(), getY1(), getCtrlX1(), getCtrlY1(),
getCtrlX2(), getCtrlY2(), getX2(), getY2());
}
/**
* Subdivides this cubic curve and stores the resulting two
* subdivided curves into the left and right curve parameters.
* Either or both of the left and right objects may be the same
* as this object or null.
* @param left the cubic curve object for storing for the left or
* first half of the subdivided curve
* @param right the cubic curve object for storing for the right or
* second half of the subdivided curve
* @since 1.2
*/
public void subdivide(CubicCurve2D left, CubicCurve2D right) {
subdivide(this, left, right);
}
/**
* Subdivides the cubic curve specified by the <code>src</code> parameter
* and stores the resulting two subdivided curves into the
* <code>left</code> and <code>right</code> curve parameters.
* Either or both of the <code>left</code> and <code>right</code> objects
* may be the same as the <code>src</code> object or <code>null</code>.
* @param src the cubic curve to be subdivided
* @param left the cubic curve object for storing the left or
* first half of the subdivided curve
* @param right the cubic curve object for storing the right or
* second half of the subdivided curve
* @since 1.2
*/
public static void subdivide(CubicCurve2D src,
CubicCurve2D left,
CubicCurve2D right) {
double x1 = src.getX1();
double y1 = src.getY1();
double ctrlx1 = src.getCtrlX1();
double ctrly1 = src.getCtrlY1();
double ctrlx2 = src.getCtrlX2();
double ctrly2 = src.getCtrlY2();
double x2 = src.getX2();
double y2 = src.getY2();
double centerx = (ctrlx1 + ctrlx2) / 2.0;
double centery = (ctrly1 + ctrly2) / 2.0;
ctrlx1 = (x1 + ctrlx1) / 2.0;
ctrly1 = (y1 + ctrly1) / 2.0;
ctrlx2 = (x2 + ctrlx2) / 2.0;
ctrly2 = (y2 + ctrly2) / 2.0;
double ctrlx12 = (ctrlx1 + centerx) / 2.0;
double ctrly12 = (ctrly1 + centery) / 2.0;
double ctrlx21 = (ctrlx2 + centerx) / 2.0;
double ctrly21 = (ctrly2 + centery) / 2.0;
centerx = (ctrlx12 + ctrlx21) / 2.0;
centery = (ctrly12 + ctrly21) / 2.0;
if (left != null) {
left.setCurve(x1, y1, ctrlx1, ctrly1,
ctrlx12, ctrly12, centerx, centery);
}
if (right != null) {
right.setCurve(centerx, centery, ctrlx21, ctrly21,
ctrlx2, ctrly2, x2, y2);
}
}
/**
* Subdivides the cubic curve specified by the coordinates
* stored in the <code>src</code> array at indices <code>srcoff</code>
* through (<code>srcoff</code> + 7) and stores the
* resulting two subdivided curves into the two result arrays at the
* corresponding indices.
* Either or both of the <code>left</code> and <code>right</code>
* arrays may be <code>null</code> or a reference to the same array
* as the <code>src</code> array.
* Note that the last point in the first subdivided curve is the
* same as the first point in the second subdivided curve. Thus,
* it is possible to pass the same array for <code>left</code>
* and <code>right</code> and to use offsets, such as <code>rightoff</code>
* equals (<code>leftoff</code> + 6), in order
* to avoid allocating extra storage for this common point.
* @param src the array holding the coordinates for the source curve
* @param srcoff the offset into the array of the beginning of the
* the 6 source coordinates
* @param left the array for storing the coordinates for the first
* half of the subdivided curve
* @param leftoff the offset into the array of the beginning of the
* the 6 left coordinates
* @param right the array for storing the coordinates for the second
* half of the subdivided curve
* @param rightoff the offset into the array of the beginning of the
* the 6 right coordinates
* @since 1.2
*/
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 ctrlx1 = src[srcoff + 2];
double ctrly1 = src[srcoff + 3];
double ctrlx2 = src[srcoff + 4];
double ctrly2 = src[srcoff + 5];
double x2 = src[srcoff + 6];
double y2 = src[srcoff + 7];
if (left != null) {
left[leftoff + 0] = x1;
left[leftoff + 1] = y1;
}
if (right != null) {
right[rightoff + 6] = x2;
right[rightoff + 7] = y2;
}
x1 = (x1 + ctrlx1) / 2.0;
y1 = (y1 + ctrly1) / 2.0;
x2 = (x2 + ctrlx2) / 2.0;
y2 = (y2 + ctrly2) / 2.0;
double centerx = (ctrlx1 + ctrlx2) / 2.0;
double centery = (ctrly1 + ctrly2) / 2.0;
ctrlx1 = (x1 + centerx) / 2.0;
ctrly1 = (y1 + centery) / 2.0;
ctrlx2 = (x2 + centerx) / 2.0;
ctrly2 = (y2 + centery) / 2.0;
centerx = (ctrlx1 + ctrlx2) / 2.0;
centery = (ctrly1 + ctrly2) / 2.0;
if (left != null) {
left[leftoff + 2] = x1;
left[leftoff + 3] = y1;
left[leftoff + 4] = ctrlx1;
left[leftoff + 5] = ctrly1;
left[leftoff + 6] = centerx;
left[leftoff + 7] = centery;
}
if (right != null) {
right[rightoff + 0] = centerx;
right[rightoff + 1] = centery;
right[rightoff + 2] = ctrlx2;
right[rightoff + 3] = ctrly2;
right[rightoff + 4] = x2;
right[rightoff + 5] = y2;
}
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public boolean contains(double x, double y) {
if (!(x * 0.0 + y * 0.0 == 0.0)) {
/* Either x or y was infinite or NaN.
* A NaN always produces a negative response to any test
* and Infinity values cannot be "inside" any path so
* they should return false as well.
*/
return false;
}
// We count the "Y" crossings to determine if the point is
// inside the curve bounded by its closing line.
double x1 = getX1();
double y1 = getY1();
double x2 = getX2();
double y2 = getY2();
int crossings =
(Curve.pointCrossingsForLine(x, y, x1, y1, x2, y2) +
Curve.pointCrossingsForCubic(x, y,
x1, y1,
getCtrlX1(), getCtrlY1(),
getCtrlX2(), getCtrlY2(),
x2, y2, 0));
return ((crossings & 1) == 1);
}
/**
* {@inheritDoc}
* @since 1.2
*/
public boolean contains(Point2D p) {
return contains(p.getX(), p.getY());
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public boolean intersects(double x, double y, double w, double h) {
// Trivially reject non-existant rectangles
if (w <= 0 || h <= 0) {
return false;
}
int numCrossings = rectCrossings(x, y, w, h);
// the intended return value is
// numCrossings != 0 || numCrossings == Curve.RECT_INTERSECTS
// but if (numCrossings != 0) numCrossings == INTERSECTS won't matter
// and if !(numCrossings != 0) then numCrossings == 0, so
// numCrossings != RECT_INTERSECT
return numCrossings != 0;
}
/**
* {@inheritDoc}
* @since 1.2
*/
public boolean intersects(Rectangle2D r) {
return intersects(r.getX(), r.getY(), r.getWidth(), r.getHeight());
}
/**
* {@inheritDoc}
* @since 1.2
*/
public boolean contains(double x, double y, double w, double h) {
if (w <= 0 || h <= 0) {
return false;
}
int numCrossings = rectCrossings(x, y, w, h);
return !(numCrossings == 0 || numCrossings == Curve.RECT_INTERSECTS);
}
private int rectCrossings(double x, double y, double w, double h) {
int crossings = 0;
if (!(getX1() == getX2() && getY1() == getY2())) {
crossings = Curve.rectCrossingsForLine(crossings,
x, y,
x+w, y+h,
getX1(), getY1(),
getX2(), getY2());
if (crossings == Curve.RECT_INTERSECTS) {
return crossings;
}
}
// we call this with the curve's direction reversed, because we wanted
// to call rectCrossingsForLine first, because it's cheaper.
return Curve.rectCrossingsForCubic(crossings,
x, y,
x+w, y+h,
getX2(), getY2(),
getCtrlX2(), getCtrlY2(),
getCtrlX1(), getCtrlY1(),
getX1(), getY1(), 0);
}
/**
* {@inheritDoc}
* @since 1.2
*/
public boolean contains(Rectangle2D r) {
return contains(r.getX(), r.getY(), r.getWidth(), r.getHeight());
}
/**
* {@inheritDoc}
* @since 1.2
*/
@Override
public GRectangle getBounds() {
return getBounds2D().getBounds();
}
/**
* Returns an iteration object that defines the boundary of the
* shape.
* The iterator for this class is not multi-threaded safe,
* which means that this <code>CubicCurve2D</code> class does not
* guarantee that modifications to the geometry of this
* <code>CubicCurve2D</code> object do not affect any iterations of
* that geometry that are already in process.
* @param at an optional <code>AffineTransform</code> to be applied to the
* coordinates as they are returned in the iteration, or <code>null</code>
* if untransformed coordinates are desired
* @return the <code>PathIterator</code> object that returns the
* geometry of the outline of this <code>CubicCurve2D</code>, one
* segment at a time.
* @since 1.2
*/
@Override
public GPathIterator getPathIterator(GAffineTransform at) {
return new CubicIterator(this, at);
}
/**
* Return an iteration object that defines the boundary of the
* flattened shape.
* The iterator for this class is not multi-threaded safe,
* which means that this <code>CubicCurve2D</code> class does not
* guarantee that modifications to the geometry of this
* <code>CubicCurve2D</code> object do not affect any iterations of
* that geometry that are already in process.
* @param at an optional <code>AffineTransform</code> to be applied to the
* coordinates as they are returned in the iteration, or <code>null</code>
* if untransformed coordinates are desired
* @param flatness the maximum amount that the control points
* for a given curve can vary from colinear before a subdivided
* curve is replaced by a straight line connecting the end points
* @return the <code>PathIterator</code> object that returns the
* geometry of the outline of this <code>CubicCurve2D</code>,
* one segment at a time.
* @since 1.2
*/
public GPathIterator getPathIterator(GAffineTransform at, double flatness) {
return new FlatteningPathIterator(getPathIterator(at), flatness);
}
@Override
public boolean intersects(int i, int j, int k, int l) {
return intersects((double)i, (double)j, (double)k, (double)l);
}
@Override
public boolean contains(int x, int y) {
return contains((double)x, (double)y);
}
@Override
public boolean contains(GRectangle2D r) {
return contains(r.getX(), r.getY(), r.getWidth(), r.getHeight());
}
@Override
public boolean intersects(GRectangle2D r) {
return intersects(r.getX(), r.getY(), r.getWidth(), r.getHeight());
}
}