59 lines
1.6 KiB
Java
59 lines
1.6 KiB
Java
/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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package netscape.plugin.composer.mapedit;
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import java.awt.*;
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public class Circle {
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Circle(int xx,int yy,int rr) {x = xx; y = yy; radius = rr;}
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Rectangle boundingBox() {
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// Rectangle centered at (x,y).
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Rectangle r = new Rectangle(x - radius,y - radius,2 * radius + 1,2 * radius + 1);
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return r;
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}
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/** Circle acts like a closed disk. I.e. boundary is included. */
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boolean containsPoint(int xx,int yy) {
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return dist(x,y,xx,yy) <= radius;
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}
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/** Standard Euclidean distance. */
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static double dist(Point p1,Point p2) {
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return dist(p1.x,p1.y,p2.x,p2.y);
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}
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void moveBy(int dx,int dy) {
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x += dx;
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y += dy;
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}
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static double dist(int x1,int y1,int x2,int y2) {
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int dx = x2 - x1;
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int dy = y2 - y1;
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return Math.sqrt(dx * dx + dy * dy);
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}
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// Center.
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int x;
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int y;
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int radius;
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}
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