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| author | marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-11-19 17:32:58 +0000 |
|---|---|---|
| committer | marcandre <marcandre@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2014-11-19 17:32:58 +0000 |
| commit | 4da89e192a757ee06e00bea15c6fe659d424ca32 (patch) | |
| tree | f2d7d73dafd99f77013796fd879a987fe0ebdca0 /lib/matrix.rb | |
| parent | 098127dc2bc417419490a83b94b3e179389828b0 (diff) | |
| download | ruby-4da89e192a757ee06e00bea15c6fe659d424ca32.tar.gz | |
* lib/matrix.rb: Add Vector#angle_with
Patch by Egunov Dmitriy [#10442]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@48505 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'lib/matrix.rb')
| -rw-r--r-- | lib/matrix.rb | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/matrix.rb b/lib/matrix.rb index f7d75b328f..4d211ddd78 100644 --- a/lib/matrix.rb +++ b/lib/matrix.rb @@ -1699,6 +1699,7 @@ end # * #-@ # # Vector functions: +# * #angle_with(v) # * #inner_product(v), dot(v) # * #cross_product(v), cross(v) # * #collect @@ -2038,6 +2039,20 @@ class Vector self / n end + # + # Returns an angle with another vector. Result is within the [0...Math::PI]. + # Vector[1,0].angle_with(Vector[0,1]) + # # => Math::PI / 2 + # + def angle_with(v) + raise TypeError, "Expected a Vector, got a #{v.class}" unless v.is_a?(Vector) + Vector.Raise ErrDimensionMismatch if size != v.size + prod = magnitude * v.magnitude + raise ZeroVectorError, "Can't get angle of zero vector" if prod == 0 + + Math.acos( inner_product(v) / prod ) + end + #-- # CONVERTING #++ |