Quelle SetAnglesTest.java Sprache: JAVA

/*
* Copyright (c) 2003, 2018, 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.
*
* 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/*
* @test
* @bug 4724580
* @summary Pie slices should be colinear with vectors used to set angles.
*/

import java.awt.geom.Arc2D;
import java.awt.geom.Point2D;

public class SetAnglesTest {

    public void runTest() {

        Arc2D arc = new Arc2D.Double(-10, -40, 20, 80, 0, 0, Arc2D.PIE);
        Point2D p1 = new Point2D.Double(10, 10);
        Point2D p2 = new Point2D.Double(10, -10);
        double threshold = 1.0E-10;

        arc.setAngles(p1.getX(), p1.getY(), p2.getX(), p2.getY());

        Point2D start = arc.getStartPoint();
        Point2D end   = arc.getEndPoint();

        checkColinear(start.getX(), start.getY(), p1.getX(), p1.getY());
        checkColinear(end.getX(), end.getY(), p2.getX(), p2.getY());
    }

    void checkColinear(double dx1, double dy1, double dx2, double dy2) {

        double threshold = 1.0E-10;

        if (!(dx1 * dx2 >= 0 &&
              dy1 * dy2 >= 0 &&
              Math.abs(dx1 * dy2 - dx2 * dy1) <= threshold)) {
            throw new RuntimeException("Angles difference is too much");
        }
    }

    public static void main(String[] args) {
        SetAnglesTest test = new SetAnglesTest();
        test.runTest();
    }
}

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