Class: Svgcode::SVG::Transform

Inherits:
Object
  • Object
show all
Defined in:
lib/svgcode/svg/transform.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str_or_a, b = nil, c = nil, d = nil, e = nil, f = nil) ⇒ Transform

Returns a new instance of Transform.



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/svgcode/svg/transform.rb', line 10

def initialize(str_or_a, b = nil, c = nil, d = nil, e = nil, f = nil)
  if str_or_a.is_a?(String)
    raise ArgumentException.new unless str_or_a.start_with?('matrix')
    nums = str_or_a.gsub(/.+\(/, '').gsub(/\)/, '').split(/\s*,\s*/)

    nums.each_with_index do |n, i|
      case i
      when 0
        @a = Svgcode::Utility.x_to_f(n)
      when 1
        @b = Svgcode::Utility.x_to_f(n)
      when 2
        @c = Svgcode::Utility.x_to_f(n)
      when 3
        @d = Svgcode::Utility.x_to_f(n)
      when 4
        @e = Svgcode::Utility.x_to_f(n)
      when 5
        @f = Svgcode::Utility.x_to_f(n)
      end
    end
  else
    @a = Svgcode::Utility.x_to_f(str_or_a)
    @b = Svgcode::Utility.x_to_f(b)
    @c = Svgcode::Utility.x_to_f(c)
    @d = Svgcode::Utility.x_to_f(d)
    @e = Svgcode::Utility.x_to_f(e)
    @f = Svgcode::Utility.x_to_f(f)
  end
end

Instance Attribute Details

#a ⇒ Object (readonly)

Returns the value of attribute a.



8
9
10
 
# File 'lib/svgcode/svg/transform.rb', line 8

def a
  @a
end

#b ⇒ Object (readonly)

Returns the value of attribute b.



8
9
10
 
# File 'lib/svgcode/svg/transform.rb', line 8

def b
  @b
end

#c ⇒ Object (readonly)

Returns the value of attribute c.



8
9
10
 
# File 'lib/svgcode/svg/transform.rb', line 8

def c
  @c
end

#d ⇒ Object (readonly)

Returns the value of attribute d.



8
9
10
 
# File 'lib/svgcode/svg/transform.rb', line 8

def d
  @d
end

#e ⇒ Object (readonly)

Returns the value of attribute e.



8
9
10
 
# File 'lib/svgcode/svg/transform.rb', line 8

def e
  @e
end

#f ⇒ Object (readonly)

Returns the value of attribute f.



8
9
10
 
# File 'lib/svgcode/svg/transform.rb', line 8

def f
  @f
end

Instance Method Details

#apply(point) ⇒ Object 



45
46
47
48
49
50
 
# File 'lib/svgcode/svg/transform.rb', line 45

def apply(point)
  point_m = Matrix[[point.x], [point.y], [1]]
  transform_m = to_matrix
  result = transform_m * point_m
  Point.new(result[0, 0], result[1, 0])
end

#to_matrix ⇒ Object 



41
42
43
 
# File 'lib/svgcode/svg/transform.rb', line 41

def to_matrix
  Matrix[[@a, @c, @e], [@b, @d, @f], [0, 0, 1]]
end