cross

ベクトル同士のクロス積

cross
(
V1
V2
)
(
V1 vec1
,
V2 vec2
)
if (
isVector!V1 &&
&&
(
hasStaticLength!V1 &&
)
&&
(
hasStaticLength!V2 &&
)
)
in { assert (vec1.length == 3); assert (vec2.length == 3); }

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