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merge revision(s) r46780: [Backport #9499]

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* lib/matrix.rb: Fix sign for cross_product [#9499]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@46789 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nagachika 2014-07-11 14:08:51 +00:00
parent 068a7dff12
commit feea0a9e82
4 changed files with 15 additions and 6 deletions
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6
lib/matrix.rb
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@ -1764,9 +1764,9 @@ class Vector
#
def cross_product(v)
Vector.Raise ErrDimensionMismatch unless size == v.size && v.size == 3
Vector[ v[1]*@elements[2] - v[2]*@elements[1],
v[2]*@elements[0] - v[0]*@elements[2],
v[0]*@elements[1] - v[1]*@elements[0] ]
Vector[ v[2]*@elements[1] - v[1]*@elements[2],
v[0]*@elements[2] - v[2]*@elements[0],
v[1]*@elements[0] - v[0]*@elements[1] ]
end
#