diff options
Diffstat (limited to 'lib')
-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 |