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Merge affde8fa0b16e6e9178859cb1a575b98c95c0648 into 514e106414961784cfc9d55e375916747160e58d

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Erich Schubert 2024-06-27 10:31:41 +02:00 committed by GitHub
commit 960ad70579
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builtin/common/vector.lua
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@ -375,6 +375,18 @@ function vector.in_area(pos, min, max)
(pos.z >= min.z) and (pos.z <= max.z)
end
function vector.random_direction()
-- Generate a random direction of unit length, via rejection sampling
local x, y, z, l2
repeat -- expected less than two attempts on average (volume sphere vs. cube)
x, y, z = math.random() * 2 - 1, math.random() * 2 - 1, math.random() * 2 - 1
l2 = x*x + y*y + z*z
until l2 <= 1 and l2 >= 1e-6
-- normalize
local l = math.sqrt(l2)
return fast_new(x/l, y/l, z/l)
end
if rawget(_G, "core") and core.set_read_vector and core.set_push_vector then
local function read_vector(v)
return v.x, v.y, v.z