Sha256: c419aeed4294762751351ab49a22a8892419a585aa8424cff0a9d958d03517a1
Contents?: true
Size: 849 Bytes
Versions: 13
Compression:
Stored size: 849 Bytes
Contents
require 'matrix'
# Monkeypatch Vector to overcome some deficiencies
class Vector
X = Vector[1,0,0]
Y = Vector[0,1,0]
Z = Vector[0,0,1]
# @group Unary operators
def +@
self
end
def -@
Vector[*(@elements.map {|e| -e })]
end
# @endgroup
# Cross-product of two {Vector}s
# @return [Vector]
def cross(other)
Vector.Raise ErrDimensionMismatch unless @elements.size == other.size
case @elements.size
when 0 then raise ArgumentError, "Can't multply zero-length Vectors"
when 1 then @elements.first * other.first
when 2 then @elements.first * other[1] - @elements.last * other.first
when 3 then Vector[ @elements[1]*other[2] - @elements[2]*other[1],
@elements[2]*other[0] - @elements[0]*other[2],
@elements[0]*other[1] - @elements[1]*other[0]]
end
end
alias ** cross
end
Version data entries
13 entries across 13 versions & 3 rubygems