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import junit.framework.TestCase;
import edu.umd.cs.piccolo.util.PAffineTransform;
import edu.umd.cs.piccolo.util.PBounds;
public class AffineTransformTest extends TestCase {
public AffineTransformTest(String aName) {
super(aName);
}
public void testRotation() {
PAffineTransform at = new PAffineTransform();
at.rotate(Math.toRadians(45));
assertEquals(at.getRotation(), Math.toRadians(45), 0.000000001);
at.setRotation(Math.toRadians(90));
assertEquals(at.getRotation(), Math.toRadians(90), 0.000000001);
}
public void testScale() {
PAffineTransform at = new PAffineTransform();
at.scaleAboutPoint(0.45, 0, 1);
assertEquals(at.getScale(), 0.45, 0.000000001);
at.setScale(0.11);
assertEquals(at.getScale(), 0.11, 0.000000001);
}
public void testTransformRect() {
PBounds b1 = new PBounds(0, 0, 100, 80);
PBounds b2 = new PBounds(100, 100, 100, 80);
PAffineTransform at = new PAffineTransform();
at.scale(0.5, 0.5);
at.translate(100, 50);
at.transform(b1, b1);
at.transform(b2, b2);
PBounds b3 = new PBounds();
PBounds b4 = new PBounds(0, 0, 100, 100);
assertTrue(at.transform(b3, b4).isEmpty());
assertEquals(b1.getX(), 50, 0.000000001);
assertEquals(b1.getY(), 25, 0.000000001);
assertEquals(b1.getWidth(), 50, 0.000000001);
assertEquals(b1.getHeight(), 40, 0.000000001);
assertEquals(b2.getX(), 100, 0.000000001);
assertEquals(b2.getY(), 75, 0.000000001);
assertEquals(b2.getWidth(), 50, 0.000000001);
assertEquals(b2.getHeight(), 40, 0.000000001);
at.inverseTransform(b1, b1);
at.inverseTransform(b2, b2);
assertEquals(b1.getX(), 0, 0.000000001);
assertEquals(b1.getY(), 0, 0.000000001);
assertEquals(b1.getWidth(), 100, 0.000000001);
assertEquals(b1.getHeight(), 80, 0.000000001);
assertEquals(b2.getX(), 100, 0.000000001);
assertEquals(b2.getY(), 100, 0.000000001);
assertEquals(b2.getWidth(), 100, 0.000000001);
assertEquals(b2.getHeight(), 80, 0.000000001);
}
}
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