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Vector3: add set_to
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133cae587c
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52
.tests/Vector3/set_to.test.lua
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52
.tests/Vector3/set_to.test.lua
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@ -0,0 +1,52 @@
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local Vector3 = require("worldeditadditions.utils.vector3")
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describe("Vector3.set_to", function()
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it("should set_to a positive vector", function()
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local a = Vector3.new(801980510, 801980510, 801980510)
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assert.are.same(
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Vector3.new(80198051, 80198051, 80198051),
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a:set_to(138907099)
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)
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end)
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it("should set_to a negative vector", function()
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local a = Vector3.new(-1897506260, -1897506260, -1897506260)
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assert.are.same(
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Vector3.new(-189750626, -189750626, -189750626),
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a:set_to(328657725)
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)
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end)
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it("should work if the length is borderline", function()
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local a = Vector3.new(80198051, 80198051, 80198051)
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assert.are.same(
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Vector3.new(80198051, 80198051, 80198051),
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a:set_to(138907099)
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)
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end)
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it("should work if the length is smaller", function()
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local a = Vector3.new(80198051, 80198051, 80198051)
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assert.are.same(
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Vector3.new(109552575, 109552575, 109552575),
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a:set_to(189750626):floor() -- Hack to ignore flating-point errors. In theory we should really use epsilon here instead
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)
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end)
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it("should return a new Vector3 instance", function()
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local a = Vector3.new(801980510, 801980510, 801980510)
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local result = a:set_to(138907099)
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assert.are.same(
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Vector3.new(80198051, 80198051, 80198051),
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result
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)
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assert.are_not.equal(result, a)
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end)
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it("should return a new Vector3 instance if the length is smaller", function()
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local a = Vector3.new(80198051, 80198051, 80198051)
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local result = a:set_to(189750626):floor()
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assert.are.same(
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Vector3.new(109552575, 109552575, 109552575),
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result
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)
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assert.are_not.equal(result, a)
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end)
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end)
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@ -175,6 +175,17 @@ function Vector3.limit_to(a, length)
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return a:clone()
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return a:clone()
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end
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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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-- @returns Vector3 A new Vector3 instance limited to the specified length.
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function Vector3.set_to(a, length)
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if type(length) ~= "number" then error("Error: Expected number, but found "..type(length)..".") end
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return (a / a:length()) * length
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end
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--- Return a vector that is amount distance towards b from a.
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--- Return a vector that is amount distance towards b from a.
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-- @param a Vector3 The vector to move from.
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-- @param a Vector3 The vector to move from.
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-- @param b Vector3 The vector to move towards.
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-- @param b Vector3 The vector to move towards.
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