324 lines
8.2 KiB
Java
324 lines
8.2 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/**
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* @author Denis M. Kishenko
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* @version $Revision$
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*/
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package java.awt.geom;
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import org.apache.harmony.misc.HashCode;
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/**
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* The Class Point2D represents a point whose data is given in high-precision
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* values appropriate for graphical operations.
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*
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* @since Android 1.0
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*/
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public abstract class Point2D implements Cloneable {
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/**
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* The Class Float is the subclass of Point2D that has all of its data
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* values stored with float-level precision.
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*
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* @since Android 1.0
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*/
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public static class Float extends Point2D {
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/**
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* The x coordinate.
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*/
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public float x;
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/**
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* The y coordinate.
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*/
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public float y;
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/**
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* Instantiates a new float-valued Point2D with its data set to zero.
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*/
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public Float() {
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}
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/**
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* Instantiates a new float-valued Point2D with the specified
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* coordinates.
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*
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* @param x
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* the x coordinate.
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* @param y
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* the y coordinate.
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*/
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public Float(float x, float y) {
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this.x = x;
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this.y = y;
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}
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@Override
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public double getX() {
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return x;
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}
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@Override
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public double getY() {
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return y;
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}
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/**
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* Sets the point's coordinates.
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*
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* @param x
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* the x coordinate.
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* @param y
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* the y coordinate.
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*/
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public void setLocation(float x, float y) {
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this.x = x;
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this.y = y;
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}
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@Override
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public void setLocation(double x, double y) {
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this.x = (float)x;
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this.y = (float)y;
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}
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@Override
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public String toString() {
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return getClass().getName() + "[x=" + x + ",y=" + y + "]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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}
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}
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/**
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* The Class Double is the subclass of Point2D that has all of its data
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* values stored with double-level precision.
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*
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* @since Android 1.0
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*/
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public static class Double extends Point2D {
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/**
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* The x coordinate.
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*/
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public double x;
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/**
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* The y coordinate.
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*/
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public double y;
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/**
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* Instantiates a new double-valued Point2D with its data set to zero.
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*/
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public Double() {
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}
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/**
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* Instantiates a new double-valued Point2D with the specified
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* coordinates.
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*
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* @param x
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* the x coordinate.
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* @param y
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* the y coordinate.
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*/
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public Double(double x, double y) {
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this.x = x;
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this.y = y;
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}
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@Override
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public double getX() {
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return x;
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}
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@Override
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public double getY() {
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return y;
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}
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@Override
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public void setLocation(double x, double y) {
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this.x = x;
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this.y = y;
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}
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@Override
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public String toString() {
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return getClass().getName() + "[x=" + x + ",y=" + y + "]"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
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}
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}
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/**
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* Instantiates a new Point2D.
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*/
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protected Point2D() {
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}
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/**
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* Gets the x coordinate.
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*
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* @return the x coordinate.
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*/
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public abstract double getX();
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/**
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* Gets the y coordinate.
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*
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* @return the y coordinate.
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*/
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public abstract double getY();
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/**
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* Sets the point's coordinates.
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*
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* @param x
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* the x coordinate.
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* @param y
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* the y coordinate.
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*/
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public abstract void setLocation(double x, double y);
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/**
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* Sets the point's coordinates by copying them from another point.
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*
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* @param p
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* the point to copy the data from.
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*/
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public void setLocation(Point2D p) {
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setLocation(p.getX(), p.getY());
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}
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/**
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* Finds the square of the distance between the two specified points.
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*
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* @param x1
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* the x coordinate of the first point.
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* @param y1
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* the y coordinate of the first point.
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* @param x2
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* the x coordinate of the second point.
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* @param y2
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* the y coordinate of the second point.
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* @return the square of the distance between the two specified points.
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*/
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public static double distanceSq(double x1, double y1, double x2, double y2) {
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x2 -= x1;
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y2 -= y1;
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return x2 * x2 + y2 * y2;
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}
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/**
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* Finds the square of the distance between this point and the specified
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* point.
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*
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* @param px
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* the x coordinate of the point.
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* @param py
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* the y coordinate of the point.
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* @return the square of the distance between this point and the specified
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* point.
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*/
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public double distanceSq(double px, double py) {
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return Point2D.distanceSq(getX(), getY(), px, py);
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}
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/**
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* Finds the square of the distance between this point and the specified
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* point.
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*
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* @param p
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* the other point.
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* @return the square of the distance between this point and the specified
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* point.
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*/
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public double distanceSq(Point2D p) {
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return Point2D.distanceSq(getX(), getY(), p.getX(), p.getY());
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}
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/**
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* Finds the distance between the two specified points.
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*
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* @param x1
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* the x coordinate of the first point.
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* @param y1
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* the y coordinate of the first point.
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* @param x2
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* the x coordinate of the second point.
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* @param y2
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* the y coordinate of the second point.
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* @return the distance between the two specified points.
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*/
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public static double distance(double x1, double y1, double x2, double y2) {
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return Math.sqrt(distanceSq(x1, y1, x2, y2));
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}
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/**
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* Finds the distance between this point and the specified point.
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*
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* @param px
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* the x coordinate of the point.
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* @param py
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* the y coordinate of the point.
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* @return the distance between this point and the specified point.
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*/
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public double distance(double px, double py) {
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return Math.sqrt(distanceSq(px, py));
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}
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/**
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* Finds the distance between this point and the specified point.
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*
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* @param p
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* the other point.
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* @return the distance between this point and the specified point.
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*/
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public double distance(Point2D p) {
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return Math.sqrt(distanceSq(p));
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}
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@Override
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public Object clone() {
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try {
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return super.clone();
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} catch (CloneNotSupportedException e) {
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throw new InternalError();
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}
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}
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@Override
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public int hashCode() {
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HashCode hash = new HashCode();
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hash.append(getX());
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hash.append(getY());
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return hash.hashCode();
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}
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@Override
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public boolean equals(Object obj) {
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if (obj == this) {
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return true;
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}
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if (obj instanceof Point2D) {
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Point2D p = (Point2D)obj;
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return getX() == p.getX() && getY() == p.getY();
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}
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return false;
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}
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}
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