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Vector3: add move_towards
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17
.tests/Vector3/move_towards.test.lua
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17
.tests/Vector3/move_towards.test.lua
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@ -0,0 +1,17 @@
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local Vector3 = require("worldeditadditions.utils.vector3")
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-- To find these numbers, in Javascript:
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-- function t(x) { return Math.sqrt((x*x)*3); }
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-- for(let i = 0; i < 1000000000; i++) { let r = t(i); if(Math.floor(r) === r) console.log(`i ${i}, r ${r}`); }
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describe("Vector3.move_towards", function()
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it("should work with a positive vector", function()
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local a = Vector3.new(3, 4, 5)
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local b = Vector3.new(10, 10, 10)
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assert.are.same(
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Vector3.new(5.0022714374157439821, 5.7162326606420661435, 6.4301938838683883048),
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a:move_towards(b, 3)
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)
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end)
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end)
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@ -175,6 +175,14 @@ 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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--- 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 b Vector3 The vector to move towards.
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-- @param amount number The amount to move.
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function Vector3.move_towards(a, b, amount)
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return a + (b - a):limit_to(amount)
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end
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-- ██████ ██████ ███████ ██████ █████ ████████ ██████ ██████
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-- ██████ ██████ ███████ ██████ █████ ████████ ██████ ██████
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-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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-- ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
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