protected void transformSpace(ga_Rectangle r) {
if (edgeAction == ZERO) {
r.position.x -= (int) xAmplitude;
r.width += (int) (2 * xAmplitude);
r.position.y -= (int) yAmplitude;
r.height += (int) (2 * yAmplitude);
}
}
public void testRectMerge() {
ga_Rectangle r = new ga_Rectangle(-10, 2, 3, 3);
ga_Rectangle s = new ga_Rectangle(-8, 4, 5, 3);
r = r.union(s);
assertEquals(new ga_Rectangle(-10, 2, 7, 5), r);
r = new ga_Rectangle(0, 0, 3, 3);
s = new ga_Rectangle(-1, 2, 1, 1);
r = r.union(s);
assertEquals(new ga_Rectangle(-1, 0, 4, 3), r);
}
public void testIntersection() {
ga_Rectangle a = new ga_Rectangle(100, 100, 100, 100);
ga_Rectangle b = new ga_Rectangle(80, 80, 100, 100);
ga_Rectangle i = a.intersect(b);
assertEquals(new ga_Rectangle(100, 100, 80, 80), i);
b = new ga_Rectangle(80, 80, 20, 20);
i = a.intersect(b);
assertTrue(i.getPerimeter() == 0);
b.width = 10;
i = a.intersect(b);
assertNull(i);
b = new ga_Rectangle(180, 180, 30, 50);
i = a.intersect(b);
assertEquals(new ga_Rectangle(180, 180, 20, 20), i);
}