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Add vector.to_string and vector.from_string (#10323)

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Writing vectors as strings is very common and should belong to `vector.*`. `minetest.pos_to_string` is also too long to write, implies that one should only use it for positions and leaves no spaces after the commas.
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DS 2021-04-05 15:55:56 +02:00 • committed by GitHub
parent 19c283546c
commit 2332527765
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19
builtin/common/tests/vector_spec.lua
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@ -48,6 +48,25 @@ describe("vector", function()
assert.same({ x = 41, y = 52, z = 63 }, vector.offset(vector.new(1, 2, 3), 40, 50, 60))
end)
it("to_string()", function()
local v = vector.new(1, 2, 3.14)
assert.same("(1, 2, 3.14)", vector.to_string(v))
end)
it("from_string()", function()
local v = vector.new(1, 2, 3.14)
assert.same({v, 13}, {vector.from_string("(1, 2, 3.14)")})
assert.same({v, 12}, {vector.from_string("(1,2 ,3.14)")})
assert.same({v, 12}, {vector.from_string("(1,2,3.14,)")})
assert.same({v, 11}, {vector.from_string("(1 2 3.14)")})
assert.same({v, 15}, {vector.from_string("( 1, 2, 3.14 )")})
assert.same({v, 15}, {vector.from_string(" ( 1, 2, 3.14) ")})
assert.same({vector.new(), 8}, {vector.from_string("(0,0,0) ( 1, 2, 3.14) ")})
assert.same({v, 22}, {vector.from_string("(0,0,0) ( 1, 2, 3.14) ", 8)})
assert.same({v, 22}, {vector.from_string("(0,0,0) ( 1, 2, 3.14) ", 9)})
assert.same(nil, vector.from_string("nothing"))
end)
-- This function is needed because of floating point imprecision.
local function almost_equal(a, b)
if type(a) == "number" then