aabb-2d
Axis aligned bounding boxes for fun and profit.
var aabb = var bounding_box = // x, y == 0, 0; width, height == 12, 12 other = bounding_box // truebounding_box // -> aabb([10, 10], [2, 2]) bounding_box // moves the bounding boxbounding_box // returns a new aabb that surrounds both bboxes
API
aabb = [new ]aabb([x, y], [w, h])
returns a new aabb.
aabb.perimeter() -> Number
returns the perimeter length of the box.
aabb.intperimeter() -> Integer
returns the integer perimeter length of the box (using a bit shift instead of a multiply.)
aabb.area() -> Number
returns the area of the box.
aabb.width() -> Number
aabb.height() -> Number
aabb.x0()
aabb.y0()
aabb.x1()
aabb.y1()
returns:
x0/y1 ------ x1/y1
| |
| | <-- height
| |
| |
x0/y0 ------ x1/y0
^
|
width
aabb.translate([x, y])
moves the box. returns itself.
aabb.intersects(aabb) -> Boolean
returns true if the two bounding boxes intersect (or touch at all.)
aabb.union(aabb) -> new aabb or null
returns a new aabb
representing the shared area of the
two aabb's. returns null
if the boxes don't intersect.
License
MIT