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* lib/matrix.rb: Generalize Vector#cross_product to arbitrary dimensions

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based on a patch by gogo tanaka [#10074]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48183 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
marcandre 2014-10-29 02:43:52 +00:00
parent 764524f65b
commit aa87ea9915
4 changed files with 47 additions and 8 deletions
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14
test/matrix/test_vector.rb
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@ -169,7 +169,17 @@ class TestVector < Test::Unit::TestCase
def test_cross_product
v = Vector[1, 0, 0].cross_product Vector[0, 1, 0]
assert_equal(Vector[0, 0, 1], v)
v = Vector[1, 0, 0].cross Vector[0, 1, 0]
assert_equal(Vector[0, 0, 1], v)
v2 = Vector[1, 2].cross_product
assert_equal(Vector[-2, 1], v2)
v3 = Vector[3, 5, 2, 1].cross(Vector[4, 3, 1, 8], Vector[2, 9, 4, 3])
assert_equal(Vector[16, -65, 139, -1], v3)
assert_equal Vector[0, 0, 0, 1],
Vector[1, 0, 0, 0].cross(Vector[0, 1, 0, 0], Vector[0, 0, 1, 0])
assert_equal Vector[0, 0, 0, 0, 1],
Vector[1, 0, 0, 0, 0].cross(Vector[0, 1, 0, 0, 0], Vector[0, 0, 1, 0, 0], Vector[0, 0, 0, 1, 0])
assert_raise(Vector::ErrDimensionMismatch) { Vector[1, 2, 3].cross_product(Vector[1, 4]) }
assert_raise(TypeError) { Vector[1, 2, 3].cross_product(42) }
assert_raise(ArgumentError) { Vector[1, 2].cross_product(Vector[2, -1]) }
assert_raise(Vector::ErrOperationNotDefined) { Vector[1].cross_product }
end
end