diff options
author | marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-04-13 03:08:28 +0000 |
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committer | marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-04-13 03:08:28 +0000 |
commit | 2106aa1990a5b6a81c0883d8732741de51e449cd (patch) | |
tree | 54dd4f5ed7107783beb020cbdedcee500e0c2d2f /lib/matrix.rb | |
parent | 4123b0d9db2353b629ad6be14bb884ecf5408524 (diff) |
* lib/matrix.rb: Add Vector#cross_product, patch by Luis Ezcurdia
[fix GH-276] [rubyspec:81eec89a124]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40273 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'lib/matrix.rb')
-rw-r--r-- | lib/matrix.rb | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/lib/matrix.rb b/lib/matrix.rb index b1d1a5c2bd..9bda8855ce 100644 --- a/lib/matrix.rb +++ b/lib/matrix.rb @@ -1519,6 +1519,7 @@ end # # Vector functions: # * #inner_product(v) +# * #cross_product(v) # * #collect # * #magnitude # * #map @@ -1758,6 +1759,17 @@ class Vector end # + # Returns the cross product of this vector whit the other. + # Vector[1, 0, 0].cross_product Vector[0, 1, 0] => Vector[0, 0, 1] + # + 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] ] + end + + # # Like Array#collect. # def collect(&block) # :yield: e |