86 lines
2.1 KiB
CoffeeScript
86 lines
2.1 KiB
CoffeeScript
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import {Vector} from '@avocado/math'
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describe 'Vector', ->
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it 'can do mathematical operations', ->
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expect(Vector.scale [.5, 1.5], 2).toEqual [1, 3]
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expect(Vector.add [1, 2], [1, 1]).toEqual [2, 3]
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expect(Vector.sub [9, 5], [5, 2]).toEqual [4, 3]
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expect(Vector.mul [3, 5], [5, 5]).toEqual [15, 25]
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expect(Vector.div [15, 5], [5, 5]).toEqual [3, 1]
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expect(Vector.mod [13, 6], [5, 5]).toEqual [3, 1]
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expect(Vector.cartesianDistance [0, 0], [1, 1]).toBe Math.sqrt 2
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expect(Vector.min [-10, 10], [0, 0]).toEqual [-10, 0]
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expect(Vector.max [-10, 10], [0, 0]).toEqual [0, 10]
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expect(Vector.clamp [-10, 10], [0, 0], [5, 5]).toEqual [0, 5]
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expect(Vector.round [3.14, 4.70]).toEqual [3, 5]
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expect(Vector.dot [2, 3], [4, 5]).toEqual 23
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expect(Vector.normalize [5, 5], [6, 7]).toEqual [
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-0.4472135954999579, -0.8944271909999159
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]
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expect(Vector.normalize [.5, .7]).toEqual [
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0.5812381937190965, 0.813733471206735
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]
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expect(Vector.abs [23, -5.20]).toEqual [23, 5.20]
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expect(Vector.floor [3.14, 4.70]).toEqual [3, 4]
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expect(Vector.area [3, 6]).toBe 18
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it 'can deep copy', ->
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vector = [0, 0]
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vector2 = Vector.copy vector
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expect(Vector.equals vector, vector2).toBe true
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vector[0] = 1
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expect(Vector.equals vector, vector2).toBe false
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it 'can test for 0 or NULL', ->
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expect(Vector.isZero [0, 0]).toBe true
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expect(Vector.isZero [1, 0]).toBe false
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expect(Vector.isNull [0, 1]).toBe true
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expect(Vector.isNull [1, 1]).toBe false
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expect(Vector.isNull null).toBe true
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expect(Vector.isNull [1]).toBe true
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expect(Vector.isNull [1, 1, 1]).toBe true
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it 'can convert to/from directions', ->
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expect(Vector.toDirection4 [0, 1]).toBe 2
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expect(Vector.toDirection4 [1, 0]).toBe 1
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expect(Vector.toDirection8 [1, 1]).toBe 5
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expect(Vector.toDirection8 [1, 0]).toBe 1
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expect(Vector.toDirection [0, 1], 4).toBe 2
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for i in [0...8]
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vector = Vector.fromDirection i
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expect(i).toBe Vector.toDirection vector, 8
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it 'can convert to object', ->
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expect(Vector.toObject [0, 16]).toEqual x: 0, y: 16
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