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Vector3: add dot product
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parent
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commit
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36
.tests/Vector3/dot.test.lua
Normal file
36
.tests/Vector3/dot.test.lua
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@ -0,0 +1,36 @@
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local Vector3 = require("worldeditadditions.utils.vector3")
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describe("Vector3.dot", function()
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it("should work with a positive vector", function()
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local a = Vector3.new(3, 3, 3)
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local b = Vector3.new(4, 5, 6)
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assert.are.equal(
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45,
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a:dot(b)
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)
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end)
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it("should work with a negative vector", function()
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local a = Vector3.new(-4, -4, -4)
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local b = Vector3.new(4, 5, 6)
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assert.are.equal(
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-60,
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a:dot(b)
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)
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end)
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it("should work with a mixed vector", function()
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local a = Vector3.new(-3, 3, -3)
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local b = Vector3.new(7, 8, 9)
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assert.are.equal(
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-24,
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a:dot(b)
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)
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end)
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it("should work with the dot_product alias", function()
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local a = Vector3.new(-3, 3, -3)
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local b = Vector3.new(7, 8, 9)
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assert.are.equal(
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-24,
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a:dot_product(b)
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)
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end)
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end)
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@ -162,6 +162,18 @@ function Vector3.length(a)
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return math.sqrt(a:length_squared())
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end
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--- Calculates the dot product of this vector and another vector.
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-- @param a Vector3 The first vector to operate on.
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-- @param a Vector3 The second vector to operate on.
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-- @returns number The dot product of this vector as a scalar value.
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function Vector3.dot(a, b)
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return a.x * b.x + a.y * b.y + a.z * b.z;
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end
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--- Alias of Vector3.dot.
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function Vector3.dot_product(a, b)
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return Vector3.dot(a, b)
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end
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--- Returns a new vector whose length clamped to the given length.
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-- The direction in which the vector is pointing is not changed.
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-- @param a Vector3 The vector to operate on.
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