@Override
public AABBOld reflect() {
// We need to manually do this since AABB breaks if v00 is to the right
// of v11, as we make algorithmic simplifications on the assumption
// that v00 is always to the left of v11.
return new AABBOld(Vec2.immutable(-v11.x(), v00.y()), Vec2.immutable(-v00.x(), v11.y()));
}
@Override
protected boolean intersectsOnOwnAxes(Shape s) {
// return getHorizontalProjection().intersects(s.getHorizontalProjection()) &&
// getVerticalProjection().intersects(s.getVerticalProjection());
return s.getHorizontalProjection().intersects(v00.x(), v11.x())
&& s.getVerticalProjection().intersects(v00.y(), v11.y());
}
@Override
protected Vec2[] getVertices() {
// throw new UnsupportedOperationException("AABB should have no need "
// + "for getVertices()!");
return new Vec2[] {
v00,
Vec2.immutable(v11.x(), v00.y()), // v10
v11,
Vec2.immutable(v00.x(), v11.y()) // v01
};
}
@Override
protected ShapeProjection getProjection(Vec2 axis) {
// This method of computation is preferable to the default impl.,
// which invokes getVertices().
float p0 = axis.dot(v00);
float p1 = axis.dot(v11);
float p2 = axis.dot(v00.x(), v11.y());
float p3 = axis.dot(v11.x(), v00.y());
return new ShapeProjection(
Maths.min(Maths.min(p0, p1), Maths.min(p2, p3)),
Maths.max(Maths.max(p0, p1), Maths.max(p2, p3)));
}
/** Calculates and returns the width of this AABB. */
public float width() {
return v11.x() - v00.x();
}
/** Gets the x-coordinate of the top-right vertex of this AABB. */
public float getMaxX() {
return v11.x();
}
/**
* Gets the x-coordinate of the bottom-left vertex - or the origin - of this AABB.
*
* @return The x-coordinate of this AABB's origin.
*/
public float getOriginX() {
return v00.x();
}
@Override
ShapeProjection getHorizontalProjection() {
return new ShapeProjection(v00.x(), v11.x());
}
@Override
public boolean containsPoint(float x, float y) {
return x >= v00.x() && x <= v11.x() && y >= v00.y() && y <= v11.y();
}
/**
* Calculates whether or not this AABB contains the specified AABB.
*
* @return {@code true} if this AABB contains {@code a}; {@code false} otherwise.
*/
public boolean containsAABB(AABBOld a) {
return v00.x() <= a.v00.x()
&& v11.x() >= a.v11.x()
&& v00.y() <= a.v00.y()
&& v11.y() >= a.v11.y();
}
/**
* Calculates whether or not two axis-aligned bounding boxes intersect.
*
* @param a The AABB with which to test intersection.
* @return {@code true} if the two AABBs intersect; {@code false} otherwise.
*/
public boolean intersectsAABB(AABBOld a) {
return v00.x() <= a.v11.x()
&& v11.x() >= a.v00.x()
&& v00.y() <= a.v11.y()
&& v11.y() >= a.v00.y();
}