Sha256: 151076d75027573d56f2eec8b3f0569bbc6adc114313dba2de39144e6c8b9f61
Contents?: true
Size: 809 Bytes
Versions: 19
Compression:
Stored size: 809 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)
return obj if angle == 0
case obj
when Matrix
(matrix * (obj - rotation_point)) + rotation_point
when GridGenerator::BaseLine
new_a = rotate(obj.a)
new_b = rotate(obj.b)
GridGenerator::BaseLine.new(a: new_a, b: new_b)
else
raise ArgumentError, "Object must be Matrix or BaseLine"
end
end
end
end
Version data entries
19 entries across 19 versions & 1 rubygems