| /* |
| * Copyright (c) 2004, 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 4980035 |
| * @summary Unit test for new methods: |
| * |
| * AffineTransform.getRotateInstance(double x, double y); |
| * AffineTransform.setToRotation(double x, double y); |
| * AffineTransform.rotate(double x, double y); |
| * |
| * AffineTransform.getQuadrantRotateInstance(int numquads); |
| * AffineTransform.setToQuadrantRotation(int numquads); |
| * AffineTransform.quadrantRotate(int numquads); |
| * |
| * @author flar |
| * @run main TestRotateMethods |
| */ |
| |
| import java.awt.geom.AffineTransform; |
| import java.awt.geom.Point2D; |
| |
| public class TestRotateMethods { |
| /* The maximum errors allowed, measured in double precision "ulps" |
| * Note that for most fields, the tests are extremely accurate - to |
| * within 3 ulps of the smaller value in the comparison |
| * For the translation components, the tests are still very accurate, |
| * but the absolute number of ulps can be noticeably higher when we |
| * use one of the rotate methods that takes an anchor point. |
| * Since a double precision value has 56 bits of precision, even |
| * 1024 ulps is extremely small as a ratio of the value. |
| */ |
| public static final double MAX_ULPS = 3.0; |
| public static final double MAX_ANCHOR_TX_ULPS = 1024.0; |
| public static double MAX_TX_ULPS = MAX_ULPS; |
| |
| // Vectors for quadrant rotations |
| public static final double quadxvec[] = { 1.0, 0.0, -1.0, 0.0 }; |
| public static final double quadyvec[] = { 0.0, 1.0, 0.0, -1.0 }; |
| |
| // Run tests once for each type of method: |
| // tx = AffineTransform.get<Rotate>Instance() |
| // tx.set<Rotate>() |
| // tx.<rotate>() |
| public static enum Mode { GET, SET, MOD }; |
| |
| // Used to accumulate and report largest differences encountered by tests |
| public static double maxulps = 0.0; |
| public static double maxtxulps = 0.0; |
| |
| // Sample anchor points for testing. |
| public static Point2D zeropt = new Point2D.Double(0, 0); |
| public static Point2D testtxpts[] = { |
| new Point2D.Double( 5, 5), |
| new Point2D.Double( 20, -10), |
| new Point2D.Double(-Math.PI, Math.E), |
| }; |
| |
| public static void main(String argv[]) { |
| test(Mode.GET); |
| test(Mode.SET); |
| test(Mode.MOD); |
| |
| System.out.println("Max scale and shear difference: "+maxulps+" ulps"); |
| System.out.println("Max translate difference: "+maxtxulps+" ulps"); |
| } |
| |
| public static void test(Mode mode) { |
| MAX_TX_ULPS = MAX_ULPS; // Stricter tx testing with no anchor point |
| test(mode, 0.5, null); |
| test(mode, 1.0, null); |
| test(mode, 3.0, null); |
| |
| // Anchor points make the tx values less reliable |
| MAX_TX_ULPS = MAX_ANCHOR_TX_ULPS; |
| for (int i = 0; i < testtxpts.length; i++) { |
| test(mode, 1.0, testtxpts[i]); |
| } |
| MAX_TX_ULPS = MAX_ULPS; // Restore to default |
| } |
| |
| public static void verify(AffineTransform at1, AffineTransform at2, |
| Mode mode, double vectorscale, Point2D txpt, |
| String message, double num, String units) |
| { |
| if (!compare(at1, at2)) { |
| System.out.println("mode == "+mode); |
| System.out.println("vectorscale == "+vectorscale); |
| System.out.println("txpt == "+txpt); |
| System.out.println(at1+", type = "+at1.getType()); |
| System.out.println(at2+", type = "+at2.getType()); |
| System.out.println("ScaleX values differ by "+ |
| ulps(at1.getScaleX(), at2.getScaleX())+" ulps"); |
| System.out.println("ScaleY values differ by "+ |
| ulps(at1.getScaleY(), at2.getScaleY())+" ulps"); |
| System.out.println("ShearX values differ by "+ |
| ulps(at1.getShearX(), at2.getShearX())+" ulps"); |
| System.out.println("ShearY values differ by "+ |
| ulps(at1.getShearY(), at2.getShearY())+" ulps"); |
| System.out.println("TranslateX values differ by "+ |
| ulps(at1.getTranslateX(), |
| at2.getTranslateX())+" ulps"); |
| System.out.println("TranslateY values differ by "+ |
| ulps(at1.getTranslateY(), |
| at2.getTranslateY())+" ulps"); |
| throw new RuntimeException(message + num + units); |
| } |
| } |
| |
| public static void test(Mode mode, double vectorscale, Point2D txpt) { |
| AffineTransform at1, at2, at3; |
| |
| for (int deg = -720; deg <= 720; deg++) { |
| if ((deg % 90) == 0) continue; |
| double radians = Math.toRadians(deg); |
| double vecy = Math.sin(radians) * vectorscale; |
| double vecx = Math.cos(radians) * vectorscale; |
| |
| at1 = makeAT(mode, txpt, radians); |
| at2 = makeAT(mode, txpt, vecx, vecy); |
| verify(at1, at2, mode, vectorscale, txpt, |
| "vector and radians do not match for ", deg, " degrees"); |
| |
| if (txpt == null) { |
| // Make sure output was same as a with a 0,0 anchor point |
| if (vectorscale == 1.0) { |
| // Only need to test radians method for one scale factor |
| at3 = makeAT(mode, zeropt, radians); |
| verify(at1, at3, mode, vectorscale, zeropt, |
| "radians not invariant with 0,0 translate at ", |
| deg, " degrees"); |
| } |
| // But test vector methods with all scale factors |
| at3 = makeAT(mode, zeropt, vecx, vecy); |
| verify(at2, at3, mode, vectorscale, zeropt, |
| "vector not invariant with 0,0 translate at ", |
| deg, " degrees"); |
| } |
| } |
| |
| for (int quad = -8; quad <= 8; quad++) { |
| double degrees = quad * 90.0; |
| double radians = Math.toRadians(degrees); |
| double vecx = quadxvec[quad & 3] * vectorscale; |
| double vecy = quadyvec[quad & 3] * vectorscale; |
| |
| at1 = makeAT(mode, txpt, radians); |
| at2 = makeAT(mode, txpt, vecx, vecy); |
| verify(at1, at2, mode, vectorscale, txpt, |
| "quadrant vector and radians do not match for ", |
| degrees, " degrees"); |
| at2 = makeQuadAT(mode, txpt, quad); |
| verify(at1, at2, mode, vectorscale, txpt, |
| "quadrant and radians do not match for ", |
| quad, " quadrants"); |
| if (txpt == null) { |
| at3 = makeQuadAT(mode, zeropt, quad); |
| verify(at2, at3, mode, vectorscale, zeropt, |
| "quadrant not invariant with 0,0 translate at ", |
| quad, " quadrants"); |
| } |
| } |
| } |
| |
| public static AffineTransform makeRandomAT() { |
| AffineTransform at = new AffineTransform(); |
| at.scale(Math.random() * -10.0, Math.random() * 100.0); |
| at.rotate(Math.random() * Math.PI); |
| at.shear(Math.random(), Math.random()); |
| at.translate(Math.random() * 300.0, Math.random() * -20.0); |
| return at; |
| } |
| |
| public static AffineTransform makeAT(Mode mode, Point2D txpt, |
| double radians) |
| { |
| AffineTransform at; |
| double tx = (txpt == null) ? 0.0 : txpt.getX(); |
| double ty = (txpt == null) ? 0.0 : txpt.getY(); |
| switch (mode) { |
| case GET: |
| if (txpt != null) { |
| at = AffineTransform.getRotateInstance(radians, tx, ty); |
| } else { |
| at = AffineTransform.getRotateInstance(radians); |
| } |
| break; |
| case SET: |
| at = makeRandomAT(); |
| if (txpt != null) { |
| at.setToRotation(radians, tx, ty); |
| } else { |
| at.setToRotation(radians); |
| } |
| break; |
| case MOD: |
| at = makeRandomAT(); |
| at.setToIdentity(); |
| if (txpt != null) { |
| at.rotate(radians, tx, ty); |
| } else { |
| at.rotate(radians); |
| } |
| break; |
| default: |
| throw new InternalError("unrecognized mode: "+mode); |
| } |
| |
| return at; |
| } |
| |
| public static AffineTransform makeAT(Mode mode, Point2D txpt, |
| double vx, double vy) |
| { |
| AffineTransform at; |
| double tx = (txpt == null) ? 0.0 : txpt.getX(); |
| double ty = (txpt == null) ? 0.0 : txpt.getY(); |
| switch (mode) { |
| case GET: |
| if (txpt != null) { |
| at = AffineTransform.getRotateInstance(vx, vy, tx, ty); |
| } else { |
| at = AffineTransform.getRotateInstance(vx, vy); |
| } |
| break; |
| case SET: |
| at = makeRandomAT(); |
| if (txpt != null) { |
| at.setToRotation(vx, vy, tx, ty); |
| } else { |
| at.setToRotation(vx, vy); |
| } |
| break; |
| case MOD: |
| at = makeRandomAT(); |
| at.setToIdentity(); |
| if (txpt != null) { |
| at.rotate(vx, vy, tx, ty); |
| } else { |
| at.rotate(vx, vy); |
| } |
| break; |
| default: |
| throw new InternalError("unrecognized mode: "+mode); |
| } |
| |
| return at; |
| } |
| |
| public static AffineTransform makeQuadAT(Mode mode, Point2D txpt, |
| int quads) |
| { |
| AffineTransform at; |
| double tx = (txpt == null) ? 0.0 : txpt.getX(); |
| double ty = (txpt == null) ? 0.0 : txpt.getY(); |
| switch (mode) { |
| case GET: |
| if (txpt != null) { |
| at = AffineTransform.getQuadrantRotateInstance(quads, tx, ty); |
| } else { |
| at = AffineTransform.getQuadrantRotateInstance(quads); |
| } |
| break; |
| case SET: |
| at = makeRandomAT(); |
| if (txpt != null) { |
| at.setToQuadrantRotation(quads, tx, ty); |
| } else { |
| at.setToQuadrantRotation(quads); |
| } |
| break; |
| case MOD: |
| at = makeRandomAT(); |
| at.setToIdentity(); |
| if (txpt != null) { |
| at.quadrantRotate(quads, tx, ty); |
| } else { |
| at.quadrantRotate(quads); |
| } |
| break; |
| default: |
| throw new InternalError("unrecognized mode: "+mode); |
| } |
| |
| return at; |
| } |
| |
| public static boolean compare(AffineTransform at1, AffineTransform at2) { |
| maxulps = Math.max(maxulps, ulps(at1.getScaleX(), at2.getScaleX())); |
| maxulps = Math.max(maxulps, ulps(at1.getScaleY(), at2.getScaleY())); |
| maxulps = Math.max(maxulps, ulps(at1.getShearX(), at2.getShearX())); |
| maxulps = Math.max(maxulps, ulps(at1.getShearY(), at2.getShearY())); |
| maxtxulps = Math.max(maxtxulps, |
| ulps(at1.getTranslateX(), at2.getTranslateX())); |
| maxtxulps = Math.max(maxtxulps, |
| ulps(at1.getTranslateY(), at2.getTranslateY())); |
| return (getModifiedType(at1) == getModifiedType(at2) && |
| (compare(at1.getScaleX(), at2.getScaleX(), MAX_ULPS)) && |
| (compare(at1.getScaleY(), at2.getScaleY(), MAX_ULPS)) && |
| (compare(at1.getShearX(), at2.getShearX(), MAX_ULPS)) && |
| (compare(at1.getShearY(), at2.getShearY(), MAX_ULPS)) && |
| (compare(at1.getTranslateX(), |
| at2.getTranslateX(), MAX_TX_ULPS)) && |
| (compare(at1.getTranslateY(), |
| at2.getTranslateY(), MAX_TX_ULPS))); |
| } |
| |
| public static int getModifiedType(AffineTransform at) { |
| int type = at.getType(); |
| // Some of the vector methods can introduce a tiny uniform scale |
| // at some angles... |
| if ((type & AffineTransform.TYPE_UNIFORM_SCALE) != 0) { |
| maxulps = Math.max(maxulps, ulps(at.getDeterminant(), 1.0)); |
| if (ulps(at.getDeterminant(), 1.0) <= MAX_ULPS) { |
| // Really tiny - we will ignore it |
| type &= (~AffineTransform.TYPE_UNIFORM_SCALE); |
| } |
| } |
| return type; |
| } |
| |
| public static boolean compare(double val1, double val2, double maxulps) { |
| return (ulps(val1, val2) <= maxulps); |
| } |
| |
| public static double ulps(double val1, double val2) { |
| double diff = Math.abs(val1 - val2); |
| double ulpmax = Math.min(Math.ulp(val1), Math.ulp(val2)); |
| return (diff / ulpmax); |
| } |
| } |
