@Before
public void before() throws Exception {
intersector = new ConfigurableRayBodyIntersector();
intersector.registerDefaults();
rectBody = bodyWith(new Rect(50, 50, 10, 10));
}
@Test
public void RayLongEnoughButNotLinedUp_ReturnsNull() {
Ray ray = new Ray(new Vector2f(10, 50), new Vector2f(50, 80));
assertNull(intersector.intersect(ray, rectBody));
}
@Test
public void RayGoesAlongRightEdgeFromBelow_ReturnsPointAtRectsLowerRightCorner() {
Ray ray = new Ray(new Vector2f(55, 70), new Vector2f(55, 10));
assertEquals(new Vector2f(55, 55), intersector.intersect(ray, rectBody));
}
@Test
public void RayGoesAlongLeftEdgeFromTop_ReturnsPointAtRectsUpperLeftCorner() {
Ray ray = new Ray(new Vector2f(45, 10), new Vector2f(45, 70));
assertEquals(new Vector2f(45, 45), intersector.intersect(ray, rectBody));
}
@Test
public void RayGoesAlongTopEdgeFromRight_ReturnsPointAtRectsUpperRightCorner() {
Ray ray = new Ray(new Vector2f(75, 45), new Vector2f(10, 45));
assertEquals(new Vector2f(55, 45), intersector.intersect(ray, rectBody));
}
@Test
public void RayGoesAlongBottomEdgeFromLeft_ReturnsPointAtRectsLowerLeftCorner() {
Ray ray = new Ray(new Vector2f(10, 55), new Vector2f(75, 55));
assertEquals(new Vector2f(45, 55), intersector.intersect(ray, rectBody));
}
@Test
public void RayGoesThroughRectFromBelow_ReturnsPointOnBottom() {
Ray ray = new Ray(new Vector2f(48, 70), new Vector2f(48, 10));
assertEquals(new Vector2f(48, 55), intersector.intersect(ray, rectBody));
}
@Test
public void RayGoesThroughRectFromAbove_ReturnsPointOnTop() {
Ray ray = new Ray(new Vector2f(48, 10), new Vector2f(48, 70));
assertEquals(new Vector2f(48, 45), intersector.intersect(ray, rectBody));
}
@Test
public void RayGoesThroughRectFromRight_ReturnsPointOnRight() {
Ray ray = new Ray(new Vector2f(70, 48), new Vector2f(10, 48));
assertEquals(new Vector2f(55, 48), intersector.intersect(ray, rectBody));
}
@Test
public void RayStartsAtRectEdge_ReturnsPointAtRayOrigin() {
Ray ray = new Ray(new Vector2f(45, 50), new Vector2f(80, 50));
assertEquals(new Vector2f(45, 50), intersector.intersect(ray, rectBody));
}