jme3-core tests: add the TestBoundingBox class

Author: stephengold

jme3-core/src/test/java/com/jme3/bounding/TestBoundingBox.java

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2024 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package com.jme3.bounding;
+
+import com.jme3.math.Vector3f;
+import org.junit.Assert;
+import org.junit.Test;
+
+/**
+ * Test cases for the BoundingBox class.
+ *
+ * @author Stephen Gold
+ */
+public class TestBoundingBox {
+    /**
+     * Verify that equals() behaves as expected.
+     */
+    @Test
+    public void testEquals() {
+        BoundingBox bb1 = new BoundingBox(new Vector3f(3f, 4f, 5f), 0f, 1f, 2f);
+        BoundingBox bb2
+                = new BoundingBox(new Vector3f(3f, 4f, 5f), -0f, 1f, 2f);
+
+        BoundingBox bb3 = new BoundingBox(new Vector3f(3f, 0f, 2f), 9f, 8f, 7f);
+        BoundingBox bb4
+                = new BoundingBox(new Vector3f(3f, -0f, 2f), 9f, 8f, 7f);
+
+        BoundingBox bb5 = new BoundingBox(new Vector3f(4f, 5f, 6f), 9f, 8f, 7f);
+        BoundingBox bb6 = (BoundingBox) bb5.clone();
+        bb6.setCheckPlane(1);
+
+        // Clones are equal to their base instances:
+        Assert.assertEquals(bb1, bb1.clone());
+        Assert.assertEquals(bb2, bb2.clone());
+        Assert.assertEquals(bb3, bb3.clone());
+        Assert.assertEquals(bb4, bb4.clone());
+        Assert.assertEquals(bb5, bb5.clone());
+        Assert.assertEquals(bb6, bb6.clone());
+
+        Assert.assertNotEquals(bb1, bb2); // because their extents differ
+        Assert.assertNotEquals(bb3, bb4); // because their centers differ
+        Assert.assertEquals(bb5, bb6); // because check planes are ignored
+    }
+
+    /**
+     * Verify that isSimilar() behaves as expected.
+     */
+    @Test
+    public void testIsSimilar() {
+        BoundingBox bb1 = new BoundingBox(new Vector3f(3f, 4f, 5f), 0f, 1f, 2f);
+        BoundingBox bb2
+                = new BoundingBox(new Vector3f(3f, 4f, 5f), 0f, 1.1f, 2f);
+
+        BoundingBox bb3 = new BoundingBox(new Vector3f(3f, 4f, 2f), 9f, 8f, 7f);
+        BoundingBox bb4
+                = new BoundingBox(new Vector3f(3f, 3.9f, 2f), 9f, 8f, 7f);
+
+        BoundingBox bb5 = new BoundingBox(new Vector3f(4f, 5f, 6f), 9f, 8f, 7f);
+        BoundingBox bb6 = (BoundingBox) bb5.clone();
+        bb6.setCheckPlane(1);
+
+        Assert.assertFalse(bb1.isSimilar(bb2, 0.09999f));
+        Assert.assertTrue(bb1.isSimilar(bb2, 0.10001f));
+
+        Assert.assertFalse(bb3.isSimilar(bb4, 0.09999f));
+        Assert.assertTrue(bb3.isSimilar(bb4, 0.10001f));
+
+        Assert.assertTrue(bb5.isSimilar(bb6, 0f)); // check planes are ignored
+    }
+}