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- /* ===========================================================
- * JFreeChart : a free chart library for the Java(tm) platform
- * ===========================================================
- *
- * (C) Copyright 2000-2013, by Object Refinery Limited and Contributors.
- *
- * Project Info: http://www.jfree.org/jfreechart/index.html
- *
- * This library is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Lesser General Public License as published by
- * the Free Software Foundation; either version 2.1 of the License, or
- * (at your option) any later version.
- *
- * This library 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 Lesser General Public
- * License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
- * USA.
- *
- * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
- * Other names may be trademarks of their respective owners.]
- *
- * ----------------------
- * LineUtilitiesTest.java
- * ----------------------
- * (C) Copyright 2008-2013, by Object Refinery Limited and Contributors.
- *
- * Original Author: David Gilbert (for Object Refinery Limited);
- * Contributor(s): -;
- *
- * Changes
- * -------
- * 05-Nov-2008 : Version 1 (DG);
- *
- */
- package org.jfree.chart.util;
- import java.awt.geom.Line2D;
- import java.awt.geom.Rectangle2D;
- import org.junit.Test;
- import static org.junit.Assert.assertTrue;
- import static org.junit.Assert.assertFalse;
- /**
- * Tests for the {@link LineUtilities} class.
- */
- public class LineUtilitiesTest {
- private boolean lineEquals(Line2D line, double x1, double y1, double x2,
- double y2) {
- boolean result = true;
- double epsilon = 0.0000000001;
- if (Math.abs(line.getX1() - x1) > epsilon) { result = false; }
- if (Math.abs(line.getY1() - y1) > epsilon) { result = false; }
- if (Math.abs(line.getX2() - x2) > epsilon) { result = false; }
- if (Math.abs(line.getY2() - y2) > epsilon) { result = false; }
- return result;
- }
- @Test
- public void testClipLine() {
- Rectangle2D rect = new Rectangle2D.Double(1.0, 1.0, 1.0, 1.0);
- Line2D line = new Line2D.Double();
- assertFalse(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 0.0, 0.0, 0.0, 0.0));
- line.setLine(0.5, 0.5, 0.6, 0.6);
- assertFalse(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 0.5, 0.5, 0.6, 0.6));
- line.setLine(0.5, 0.5, 1.6, 0.6);
- assertFalse(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 0.5, 0.5, 1.6, 0.6));
- line.setLine(0.5, 0.5, 2.6, 0.6);
- assertFalse(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 0.5, 0.5, 2.6, 0.6));
- line.setLine(0.5, 0.5, 0.6, 1.6);
- assertFalse(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 0.5, 0.5, 0.6, 1.6));
- line.setLine(0.5, 0.5, 1.6, 1.6);
- assertTrue(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 1.0, 1.0, 1.6, 1.6));
- line.setLine(0.5, 0.5, 2.6, 1.6);
- assertTrue(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 1.4545454545454546, 1.0, 2.0,
- 1.2857142857142858));
- line.setLine(0.5, 0.5, 0.5, 2.6);
- assertFalse(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 0.5, 0.5, 0.5, 2.6));
- line.setLine(0.5, 0.5, 1.5, 2.6);
- assertTrue(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 1.0, 1.55, 1.2142857142857142, 2.0));
- line.setLine(0.5, 0.5, 2.5, 2.6);
- assertTrue(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 1.0, 1.025, 1.9285714285714284, 2.0));
- line.setLine(0.5, 0.5, 1.5, 1.5);
- assertTrue(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 1.0, 1.0, 1.5, 1.5));
- line.setLine(2.5, 1.0, 1.5, 1.5);
- assertTrue(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 2.0, 1.25, 1.5, 1.5));
- line.setLine(1.5, 1.5, 2.5, 1.0);
- assertTrue(LineUtilities.clipLine(line, rect));
- assertTrue(lineEquals(line, 1.5, 1.5, 2.0, 1.25));
- }
- }
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