353 lines
14 KiB
Java
353 lines
14 KiB
Java
/*
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* Copyright (c) 2004, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 4980035
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* @summary Unit test for new methods:
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*
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* AffineTransform.getRotateInstance(double x, double y);
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* AffineTransform.setToRotation(double x, double y);
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* AffineTransform.rotate(double x, double y);
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*
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* AffineTransform.getQuadrantRotateInstance(int numquads);
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* AffineTransform.setToQuadrantRotation(int numquads);
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* AffineTransform.quadrantRotate(int numquads);
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*
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* @author flar
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* @run main TestRotateMethods
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*/
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import java.awt.geom.AffineTransform;
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import java.awt.geom.Point2D;
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public class TestRotateMethods {
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/* The maximum errors allowed, measured in double precision "ulps"
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* Note that for most fields, the tests are extremely accurate - to
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* within 3 ulps of the smaller value in the comparison
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* For the translation components, the tests are still very accurate,
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* but the absolute number of ulps can be noticeably higher when we
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* use one of the rotate methods that takes an anchor point.
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* Since a double precision value has 56 bits of precision, even
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* 1024 ulps is extremely small as a ratio of the value.
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*/
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public static final double MAX_ULPS = 3.0;
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public static final double MAX_ANCHOR_TX_ULPS = 1024.0;
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public static double MAX_TX_ULPS = MAX_ULPS;
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// Vectors for quadrant rotations
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public static final double quadxvec[] = { 1.0, 0.0, -1.0, 0.0 };
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public static final double quadyvec[] = { 0.0, 1.0, 0.0, -1.0 };
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// Run tests once for each type of method:
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// tx = AffineTransform.get<Rotate>Instance()
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// tx.set<Rotate>()
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// tx.<rotate>()
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public static enum Mode { GET, SET, MOD };
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// Used to accumulate and report largest differences encountered by tests
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public static double maxulps = 0.0;
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public static double maxtxulps = 0.0;
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// Sample anchor points for testing.
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public static Point2D zeropt = new Point2D.Double(0, 0);
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public static Point2D testtxpts[] = {
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new Point2D.Double( 5, 5),
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new Point2D.Double( 20, -10),
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new Point2D.Double(-Math.PI, Math.E),
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};
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public static void main(String argv[]) {
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test(Mode.GET);
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test(Mode.SET);
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test(Mode.MOD);
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System.out.println("Max scale and shear difference: "+maxulps+" ulps");
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System.out.println("Max translate difference: "+maxtxulps+" ulps");
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}
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public static void test(Mode mode) {
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MAX_TX_ULPS = MAX_ULPS; // Stricter tx testing with no anchor point
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test(mode, 0.5, null);
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test(mode, 1.0, null);
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test(mode, 3.0, null);
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// Anchor points make the tx values less reliable
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MAX_TX_ULPS = MAX_ANCHOR_TX_ULPS;
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for (int i = 0; i < testtxpts.length; i++) {
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test(mode, 1.0, testtxpts[i]);
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}
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MAX_TX_ULPS = MAX_ULPS; // Restore to default
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}
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public static void verify(AffineTransform at1, AffineTransform at2,
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Mode mode, double vectorscale, Point2D txpt,
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String message, double num, String units)
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{
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if (!compare(at1, at2)) {
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System.out.println("mode == "+mode);
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System.out.println("vectorscale == "+vectorscale);
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System.out.println("txpt == "+txpt);
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System.out.println(at1+", type = "+at1.getType());
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System.out.println(at2+", type = "+at2.getType());
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System.out.println("ScaleX values differ by "+
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ulps(at1.getScaleX(), at2.getScaleX())+" ulps");
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System.out.println("ScaleY values differ by "+
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ulps(at1.getScaleY(), at2.getScaleY())+" ulps");
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System.out.println("ShearX values differ by "+
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ulps(at1.getShearX(), at2.getShearX())+" ulps");
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System.out.println("ShearY values differ by "+
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ulps(at1.getShearY(), at2.getShearY())+" ulps");
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System.out.println("TranslateX values differ by "+
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ulps(at1.getTranslateX(),
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at2.getTranslateX())+" ulps");
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System.out.println("TranslateY values differ by "+
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ulps(at1.getTranslateY(),
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at2.getTranslateY())+" ulps");
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throw new RuntimeException(message + num + units);
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}
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}
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public static void test(Mode mode, double vectorscale, Point2D txpt) {
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AffineTransform at1, at2, at3;
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for (int deg = -720; deg <= 720; deg++) {
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if ((deg % 90) == 0) continue;
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double radians = Math.toRadians(deg);
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double vecy = Math.sin(radians) * vectorscale;
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double vecx = Math.cos(radians) * vectorscale;
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at1 = makeAT(mode, txpt, radians);
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at2 = makeAT(mode, txpt, vecx, vecy);
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verify(at1, at2, mode, vectorscale, txpt,
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"vector and radians do not match for ", deg, " degrees");
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if (txpt == null) {
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// Make sure output was same as a with a 0,0 anchor point
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if (vectorscale == 1.0) {
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// Only need to test radians method for one scale factor
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at3 = makeAT(mode, zeropt, radians);
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verify(at1, at3, mode, vectorscale, zeropt,
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"radians not invariant with 0,0 translate at ",
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deg, " degrees");
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}
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// But test vector methods with all scale factors
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at3 = makeAT(mode, zeropt, vecx, vecy);
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verify(at2, at3, mode, vectorscale, zeropt,
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"vector not invariant with 0,0 translate at ",
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deg, " degrees");
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}
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}
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for (int quad = -8; quad <= 8; quad++) {
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double degrees = quad * 90.0;
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double radians = Math.toRadians(degrees);
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double vecx = quadxvec[quad & 3] * vectorscale;
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double vecy = quadyvec[quad & 3] * vectorscale;
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at1 = makeAT(mode, txpt, radians);
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at2 = makeAT(mode, txpt, vecx, vecy);
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verify(at1, at2, mode, vectorscale, txpt,
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"quadrant vector and radians do not match for ",
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degrees, " degrees");
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at2 = makeQuadAT(mode, txpt, quad);
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verify(at1, at2, mode, vectorscale, txpt,
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"quadrant and radians do not match for ",
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quad, " quadrants");
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if (txpt == null) {
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at3 = makeQuadAT(mode, zeropt, quad);
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verify(at2, at3, mode, vectorscale, zeropt,
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"quadrant not invariant with 0,0 translate at ",
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quad, " quadrants");
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}
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}
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}
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public static AffineTransform makeRandomAT() {
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AffineTransform at = new AffineTransform();
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at.scale(Math.random() * -10.0, Math.random() * 100.0);
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at.rotate(Math.random() * Math.PI);
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at.shear(Math.random(), Math.random());
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at.translate(Math.random() * 300.0, Math.random() * -20.0);
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return at;
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}
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public static AffineTransform makeAT(Mode mode, Point2D txpt,
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double radians)
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{
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AffineTransform at;
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double tx = (txpt == null) ? 0.0 : txpt.getX();
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double ty = (txpt == null) ? 0.0 : txpt.getY();
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switch (mode) {
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case GET:
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if (txpt != null) {
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at = AffineTransform.getRotateInstance(radians, tx, ty);
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} else {
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at = AffineTransform.getRotateInstance(radians);
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}
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break;
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case SET:
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at = makeRandomAT();
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if (txpt != null) {
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at.setToRotation(radians, tx, ty);
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} else {
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at.setToRotation(radians);
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}
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break;
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case MOD:
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at = makeRandomAT();
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at.setToIdentity();
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if (txpt != null) {
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at.rotate(radians, tx, ty);
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} else {
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at.rotate(radians);
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}
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break;
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default:
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throw new InternalError("unrecognized mode: "+mode);
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}
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return at;
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}
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public static AffineTransform makeAT(Mode mode, Point2D txpt,
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double vx, double vy)
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{
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AffineTransform at;
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double tx = (txpt == null) ? 0.0 : txpt.getX();
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double ty = (txpt == null) ? 0.0 : txpt.getY();
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switch (mode) {
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case GET:
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if (txpt != null) {
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at = AffineTransform.getRotateInstance(vx, vy, tx, ty);
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} else {
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at = AffineTransform.getRotateInstance(vx, vy);
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}
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break;
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case SET:
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at = makeRandomAT();
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if (txpt != null) {
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at.setToRotation(vx, vy, tx, ty);
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} else {
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at.setToRotation(vx, vy);
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}
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break;
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case MOD:
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at = makeRandomAT();
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at.setToIdentity();
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if (txpt != null) {
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at.rotate(vx, vy, tx, ty);
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} else {
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at.rotate(vx, vy);
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}
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break;
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default:
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throw new InternalError("unrecognized mode: "+mode);
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}
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return at;
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}
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public static AffineTransform makeQuadAT(Mode mode, Point2D txpt,
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int quads)
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{
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AffineTransform at;
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double tx = (txpt == null) ? 0.0 : txpt.getX();
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double ty = (txpt == null) ? 0.0 : txpt.getY();
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switch (mode) {
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case GET:
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if (txpt != null) {
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at = AffineTransform.getQuadrantRotateInstance(quads, tx, ty);
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} else {
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at = AffineTransform.getQuadrantRotateInstance(quads);
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}
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break;
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case SET:
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at = makeRandomAT();
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if (txpt != null) {
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at.setToQuadrantRotation(quads, tx, ty);
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} else {
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at.setToQuadrantRotation(quads);
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}
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break;
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case MOD:
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at = makeRandomAT();
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at.setToIdentity();
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if (txpt != null) {
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at.quadrantRotate(quads, tx, ty);
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} else {
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at.quadrantRotate(quads);
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}
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break;
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default:
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throw new InternalError("unrecognized mode: "+mode);
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}
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return at;
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}
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public static boolean compare(AffineTransform at1, AffineTransform at2) {
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maxulps = Math.max(maxulps, ulps(at1.getScaleX(), at2.getScaleX()));
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maxulps = Math.max(maxulps, ulps(at1.getScaleY(), at2.getScaleY()));
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maxulps = Math.max(maxulps, ulps(at1.getShearX(), at2.getShearX()));
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maxulps = Math.max(maxulps, ulps(at1.getShearY(), at2.getShearY()));
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maxtxulps = Math.max(maxtxulps,
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ulps(at1.getTranslateX(), at2.getTranslateX()));
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maxtxulps = Math.max(maxtxulps,
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ulps(at1.getTranslateY(), at2.getTranslateY()));
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return (getModifiedType(at1) == getModifiedType(at2) &&
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(compare(at1.getScaleX(), at2.getScaleX(), MAX_ULPS)) &&
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(compare(at1.getScaleY(), at2.getScaleY(), MAX_ULPS)) &&
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(compare(at1.getShearX(), at2.getShearX(), MAX_ULPS)) &&
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(compare(at1.getShearY(), at2.getShearY(), MAX_ULPS)) &&
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(compare(at1.getTranslateX(),
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at2.getTranslateX(), MAX_TX_ULPS)) &&
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(compare(at1.getTranslateY(),
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at2.getTranslateY(), MAX_TX_ULPS)));
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}
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public static int getModifiedType(AffineTransform at) {
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int type = at.getType();
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// Some of the vector methods can introduce a tiny uniform scale
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// at some angles...
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if ((type & AffineTransform.TYPE_UNIFORM_SCALE) != 0) {
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maxulps = Math.max(maxulps, ulps(at.getDeterminant(), 1.0));
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if (ulps(at.getDeterminant(), 1.0) <= MAX_ULPS) {
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// Really tiny - we will ignore it
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type &= (~AffineTransform.TYPE_UNIFORM_SCALE);
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}
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}
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return type;
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}
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public static boolean compare(double val1, double val2, double maxulps) {
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return (ulps(val1, val2) <= maxulps);
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}
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public static double ulps(double val1, double val2) {
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double diff = Math.abs(val1 - val2);
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double ulpmax = Math.min(Math.ulp(val1), Math.ulp(val2));
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return (diff / ulpmax);
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}
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}
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