package aima.test.core.unit.util.math.geom.shapes;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
import aima.core.util.Util;
import aima.core.util.math.geom.shapes.*;
/**
* Test case for the {@code aima.core.util.math.geom} package.
* Tests valid implementation of the {@link IGeometric2D} interface by {@link Rect2D}.
*
* @author Arno v. Borries
* @author Jan Phillip Kretzschmar
* @author Andreas Walscheid
*
*/
@SuppressWarnings("javadoc")
public class Rect2DTest {
private Rect2D testRect;
private Point2D zeroPoint;
@Before
public void setUp() throws Exception {
testRect = new Rect2D(3.0d, 4.0d, 5.0d, 8.0d);
zeroPoint = new Point2D(0.0d,0.0d);
}
@Test
public final void testRandomPoint() {
for (int i = 0; i < 1000; i++){
assertTrue("Random point in rectangle.", testRect.isInsideBorder(testRect.randomPoint()));
}
}
@Test
public final void testIsInside() {
assertFalse("Point not inside rectangle.", testRect.isInside(zeroPoint));
assertFalse("Point on border.", testRect.isInside(new Point2D(3.0d,6.0d)));
assertTrue("Point inside rectangle.", testRect.isInside(new Point2D(4.0d,6.0d)));
}
@Test
public final void testIsInsideBorder() {
assertFalse("Point not inside rectangle.", testRect.isInsideBorder(zeroPoint));
assertTrue("Point on border.", testRect.isInsideBorder(new Point2D(3.0d,6.0d)));
assertTrue("Point inside rectangle.", testRect.isInsideBorder(new Point2D(4.0d,6.0d)));
}
@Test
public final void testRayCast() {
// Static RayCast tests
assertEquals("Ray doesn't intersect.", Double.POSITIVE_INFINITY, testRect.rayCast(new Ray2D(1.0d,1.0d,-7.0d,-8.0d)), 0.000005d);
assertEquals("Ray intersects.", Math.sqrt(2), testRect.rayCast(new Ray2D(2.0d,3.0d,3.0d,4.0d)), 0.000005d);
// Serial RayCast tests
Rect2D randomRect;
Line2D currentSide;
Point2D randomPointOnSide;
Point2D randomPoint;
int i = 100;
do {
randomRect = new Rect2D(Util.generateRandomDoubleBetween(-1000.0d, 1000.0d),Util.generateRandomDoubleBetween(-1000.0d, 1000.0d),Util.generateRandomDoubleBetween(-1000.0d, 1000.0d),Util.generateRandomDoubleBetween(-1000.0d, 1000.0d));
int j = 50;
do {
currentSide = new Line2D(randomRect.getUpperLeft(),randomRect.getUpperRight());
randomPointOnSide = currentSide.randomPoint();
randomPoint = new Point2D(Util.generateRandomDoubleBetween(-1000.0d, 1000.0d),Util.generateRandomDoubleBetween(randomPointOnSide.getY(), 1000.0d));
assertEquals("Serial rayCast test for Rect2D, upper side.", randomPoint.distance(randomPointOnSide), randomRect.rayCast(new Ray2D(randomPoint, randomPoint.vec(randomPointOnSide))), 0.000005d);
currentSide = new Line2D(randomRect.getLowerLeft(),randomRect.getLowerRight());
randomPointOnSide = currentSide.randomPoint();
randomPoint = new Point2D(Util.generateRandomDoubleBetween(-1000.0d, 1000.0d),Util.generateRandomDoubleBetween(-1000.0d, randomPointOnSide.getY()));
assertEquals("Serial rayCast test for Rect2D, lower side.", randomPoint.distance(randomPointOnSide), randomRect.rayCast(new Ray2D(randomPoint, randomPoint.vec(randomPointOnSide))), 0.000005d);
currentSide = new Line2D(randomRect.getLowerLeft(),randomRect.getUpperLeft());
randomPointOnSide = currentSide.randomPoint();
randomPoint = new Point2D(Util.generateRandomDoubleBetween(-1000.0d, randomPointOnSide.getX()),Util.generateRandomDoubleBetween(-1000.0d, 1000.0d));
assertEquals("Serial rayCast test for Rect2D, left side.", randomPoint.distance(randomPointOnSide), randomRect.rayCast(new Ray2D(randomPoint, randomPoint.vec(randomPointOnSide))), 0.000005d);
currentSide = new Line2D(randomRect.getLowerRight(),randomRect.getUpperRight());
randomPointOnSide = currentSide.randomPoint();
randomPoint = new Point2D(Util.generateRandomDoubleBetween(randomPointOnSide.getX(), 1000.0d),Util.generateRandomDoubleBetween(-1000.0d, 1000.0d));
assertEquals("Serial rayCast test for Rect2D, right side.", randomPoint.distance(randomPointOnSide), randomRect.rayCast(new Ray2D(randomPoint, randomPoint.vec(randomPointOnSide))), 0.000005d);
j -= 1;
} while (j > 0);
i -= 1;
} while (i > 0);
}
@Test
public final void testGetBounds() {
assertNotEquals("Not the bounding rectangle.", 1.0d, testRect.getBounds().getUpperLeft().getX(), 0.000005d);
assertNotEquals("Not the bounding rectangle.", 6.0d, testRect.getBounds().getUpperLeft().getY(), 0.000005d);
assertNotEquals("Not the bounding rectangle.", 6.0d, testRect.getBounds().getLowerRight().getX(), 0.000005d);
assertNotEquals("Not the bounding rectangle.", 1.0d, testRect.getBounds().getLowerRight().getY(), 0.000005d);
assertEquals("The bounding rectangle.", 3.0d, testRect.getBounds().getUpperLeft().getX(), 0.000005d);
assertEquals("The bounding rectangle.", 8.0d, testRect.getBounds().getUpperLeft().getY(), 0.000005d);
assertEquals("The bounding rectangle.", 5.0d, testRect.getBounds().getLowerRight().getX(), 0.000005d);
assertEquals("The bounding rectangle.", 4.0d, testRect.getBounds().getLowerRight().getY(), 0.000005d);
}
@Test
public final void testTransform() {
assertEquals("Transformation by identity matrix.", ((Rect2D)testRect.transform(TransformMatrix2D.UNITY_MATRIX)).getUpperLeft().getX(), testRect.getUpperLeft().getX(), 0.000005d);
assertEquals("Transformation by identity matrix.", ((Rect2D)testRect.transform(TransformMatrix2D.UNITY_MATRIX)).getUpperLeft().getY(), testRect.getUpperLeft().getY(), 0.000005d);
assertEquals("Transformation by identity matrix.", ((Rect2D)testRect.transform(TransformMatrix2D.UNITY_MATRIX)).getLowerRight().getX(), testRect.getLowerRight().getX(), 0.000005d);
assertEquals("Transformation by identity matrix.", ((Rect2D)testRect.transform(TransformMatrix2D.UNITY_MATRIX)).getLowerRight().getY(), testRect.getLowerRight().getY(), 0.000005d);
assertEquals("Translating rectangle: ULX.", ((Rect2D)testRect.transform(TransformMatrix2D.translate(3.0d,5.0d))).getUpperLeft().getX(), 6.0d, 0.000005d);
assertEquals("Translating rectangle: ULY.", ((Rect2D)testRect.transform(TransformMatrix2D.translate(3.0d,5.0d))).getUpperLeft().getY(), 13.0d, 0.000005d);
assertEquals("Translating rectangle: LRX.", ((Rect2D)testRect.transform(TransformMatrix2D.translate(3.0d,5.0d))).getLowerRight().getX(), 8.0d, 0.000005d);
assertEquals("Translating rectangle: LRY.", ((Rect2D)testRect.transform(TransformMatrix2D.translate(3.0d,5.0d))).getLowerRight().getY(), 9.0d, 0.000005d);
assertEquals("Scaling rectangle: ULX.", ((Rect2D)testRect.transform(TransformMatrix2D.scale(2.0d,4.0d))).getUpperLeft().getX(), 6.0d, 0.000005d);
assertEquals("Scaling rectangle: ULY.", ((Rect2D)testRect.transform(TransformMatrix2D.scale(2.0d,4.0d))).getUpperLeft().getY(), 32.0d, 0.000005d);
assertEquals("Scaling rectangle: ULX.", ((Rect2D)testRect.transform(TransformMatrix2D.scale(2.0d,4.0d))).getLowerRight().getX(), 10.0d, 0.000005d);
assertEquals("Scaling rectangle: ULY.", ((Rect2D)testRect.transform(TransformMatrix2D.scale(2.0d,4.0d))).getLowerRight().getY(), 16.0d, 0.000005d);
}
}