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require "./test_helper.js"
extend(global, require "../../lib/rect.js")
context "Rect",
should "set rect properties correctly", ->
[x1, y1, x2, y2] = [1, 2, 3, 4]
rect = Rect.create x1, y1, x2, y2
assert.equal rect.left, x1
assert.equal rect.top, y1
assert.equal rect.right, x2
assert.equal rect.bottom, y2
assert.equal rect.width, x2 - x1
assert.equal rect.height, y2 - y1
should "translate rect horizontally", ->
[x1, y1, x2, y2] = [1, 2, 3, 4]
x = 5
rect1 = Rect.create x1, y1, x2, y2
rect2 = Rect.translate rect1, x
assert.equal rect1.left + x, rect2.left
assert.equal rect1.right + x, rect2.right
assert.equal rect1.width, rect2.width
assert.equal rect1.height, rect2.height
assert.equal rect1.top, rect2.top
assert.equal rect1.bottom, rect2.bottom
should "translate rect vertically", ->
[x1, y1, x2, y2] = [1, 2, 3, 4]
y = 5
rect1 = Rect.create x1, y1, x2, y2
rect2 = Rect.translate rect1, undefined, y
assert.equal rect1.top + y, rect2.top
assert.equal rect1.bottom + y, rect2.bottom
assert.equal rect1.width, rect2.width
assert.equal rect1.height, rect2.height
assert.equal rect1.left, rect2.left
assert.equal rect1.right, rect2.right
context "Rect subtraction",
context "unchanged by rects outside",
should "left, above", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create -2, -2, -1, -1
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "left", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create -2, 0, -1, 1
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "left, below", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create -2, 2, -1, 3
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "right, above", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 2, -2, 3, -1
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "right", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 2, 0, 3, 1
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "right, below", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 2, 2, 3, 3
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "above", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 0, -2, 1, -1
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "below", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 0, 2, 1, 3
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
context "unchanged by rects touching",
should "left, above", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create -1, -1, 0, 0
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "left", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create -1, 0, 0, 1
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "left, below", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create -1, 1, 0, 2
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "right, above", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 1, -1, 2, 0
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "right", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 1, 0, 2, 1
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "right, below", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 1, 1, 2, 2
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "above", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 0, -1, 1, 0
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "below", ->
rect1 = Rect.create 0, 0, 1, 1
rect2 = Rect.create 0, 1, 1, 2
rects = Rect.subtract rect1, rect2
assert.equal rects.length, 1
rect = rects[0]
assert.isTrue Rect.equals rect1, rect
should "have nothing when subtracting itself", ->
rect = Rect.create 0, 0, 1, 1
rects = Rect.subtract rect, rect
assert.equal rects.length, 0
should "not overlap subtracted rect", ->
rect = Rect.create 0, 0, 3, 3
for x in [-2..2]
for y in [-2..2]
for width in [1..3]
for height in [1..3]
subtractRect = Rect.create x, y, (x + width), (y + height)
resultRects = Rect.subtract rect, subtractRect
for resultRect in resultRects
assert.isFalse Rect.intersects subtractRect, resultRect
should "be contained in original rect", ->
rect = Rect.create 0, 0, 3, 3
for x in [-2..2]
for y in [-2..2]
for width in [1..3]
for height in [1..3]
subtractRect = Rect.create x, y, (x + width), (y + height)
resultRects = Rect.subtract rect, subtractRect
for resultRect in resultRects
assert.isTrue Rect.intersects rect, resultRect
should "contain the subtracted rect in the original minus the results", ->
rect = Rect.create 0, 0, 3, 3
for x in [-2..2]
for y in [-2..2]
for width in [1..3]
for height in [1..3]
subtractRect = Rect.create x, y, (x + width), (y + height)
resultRects = Rect.subtract rect, subtractRect
resultComplement = [Rect.copy rect]
for resultRect in resultRects
resultComplement = Array::concat.apply [],
(resultComplement.map (rect) -> Rect.subtract rect, resultRect)
assert.isTrue (resultComplement.length == 0 or resultComplement.length == 1)
if resultComplement.length == 1
complementRect = resultComplement[0]
assert.isTrue Rect.intersects subtractRect, complementRect
context "Rect overlaps",
should "detect that a rect overlaps itself", ->
rect = Rect.create 2, 2, 4, 4
assert.isTrue Rect.rectsOverlap rect, rect
should "detect that non-overlapping rectangles do not overlap on the left", ->
rect1 = Rect.create 2, 2, 4, 4
rect2 = Rect.create 0, 2, 1, 4
assert.isFalse Rect.rectsOverlap rect1, rect2
should "detect that non-overlapping rectangles do not overlap on the right", ->
rect1 = Rect.create 2, 2, 4, 4
rect2 = Rect.create 5, 2, 6, 4
assert.isFalse Rect.rectsOverlap rect1, rect2
should "detect that non-overlapping rectangles do not overlap on the top", ->
rect1 = Rect.create 2, 2, 4, 4
rect2 = Rect.create 2, 0, 2, 1
assert.isFalse Rect.rectsOverlap rect1, rect2
should "detect that non-overlapping rectangles do not overlap on the bottom", ->
rect1 = Rect.create 2, 2, 4, 4
rect2 = Rect.create 2, 5, 2, 6
assert.isFalse Rect.rectsOverlap rect1, rect2
should "detect overlapping rectangles on the left", ->
rect1 = Rect.create 2, 2, 4, 4
rect2 = Rect.create 0, 2, 2, 4
assert.isTrue Rect.rectsOverlap rect1, rect2
should "detect overlapping rectangles on the right", ->
rect1 = Rect.create 2, 2, 4, 4
rect2 = Rect.create 4, 2, 5, 4
assert.isTrue Rect.rectsOverlap rect1, rect2
should "detect overlapping rectangles on the top", ->
rect1 = Rect.create 2, 2, 4, 4
rect2 = Rect.create 2, 4, 4, 5
assert.isTrue Rect.rectsOverlap rect1, rect2
should "detect overlapping rectangles on the bottom", ->
rect1 = Rect.create 2, 2, 4, 4
rect2 = Rect.create 2, 0, 4, 2
assert.isTrue Rect.rectsOverlap rect1, rect2
should "detect overlapping rectangles when second rectangle is contained in first", ->
rect1 = Rect.create 1, 1, 4, 4
rect2 = Rect.create 2, 2, 3, 3
assert.isTrue Rect.rectsOverlap rect1, rect2
should "detect overlapping rectangles when first rectangle is contained in second", ->
rect1 = Rect.create 1, 1, 4, 4
rect2 = Rect.create 2, 2, 3, 3
assert.isTrue Rect.rectsOverlap rect2, rect1
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