Sha256: d3c7733ef8d7b03c7c66fc191e725eb43db64981d06f5e3d26c7247371da823c
Contents?: true
Size: 765 Bytes
Versions: 13
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Stored size: 765 Bytes
Contents
module GridGenerator
class Rotator
def initialize(angle:, rotation_point:)
@angle = angle
@matrix = Matrix[
[Math.cos(angle), -1*Math.sin(angle)],
[Math.sin(angle), Math.cos(angle)]
]
@rotation_point = rotation_point
end
attr_reader :angle, :matrix, :rotation_point
# subtract rotation point to move point towards 0,0, rotate, then add to move back
def rotate(obj)
case obj
when Matrix
(matrix * (obj - rotation_point)) + rotation_point
when GridGenerator::Line
new_a = rotate(obj.a)
new_b = rotate(obj.b)
GridGenerator::Line.new(a: new_a, b: new_b)
else
raise ArgumentError, "Object must be Matrix or Line"
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems