Class: Pdfrb::Content::GraphicObject::Curve

Inherits:
Object
  • Object
show all
Defined in:
lib/pdfrb/content/graphic_object/curve.rb

Overview

Cubic Bezier curve through one start point, two control points, and one end point. Convenience wrapper around canvas.curve_to for users that prefer object form.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(start:, c1:, c2:, endpoint:) ⇒ Curve

Returns a new instance of Curve.



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# File 'lib/pdfrb/content/graphic_object/curve.rb', line 12

def initialize(start:, c1:, c2:, endpoint:)
  @start = [start[0].to_f, start[1].to_f]
  @c1 = [c1[0].to_f, c1[1].to_f]
  @c2 = [c2[0].to_f, c2[1].to_f]
  @endpoint = [endpoint[0].to_f, endpoint[1].to_f]
end

Instance Attribute Details

#c1 ⇒ Object (readonly)

Returns the value of attribute c1.



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# File 'lib/pdfrb/content/graphic_object/curve.rb', line 10

def c1
  @c1
end

#c2 ⇒ Object (readonly)

Returns the value of attribute c2.



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# File 'lib/pdfrb/content/graphic_object/curve.rb', line 10

def c2
  @c2
end

#endpoint ⇒ Object (readonly)

Returns the value of attribute endpoint.



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# File 'lib/pdfrb/content/graphic_object/curve.rb', line 10

def endpoint
  @endpoint
end

#start ⇒ Object (readonly)

Returns the value of attribute start.



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# File 'lib/pdfrb/content/graphic_object/curve.rb', line 10

def start
  @start
end

Instance Method Details

#draw(canvas) ⇒ Object 



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# File 'lib/pdfrb/content/graphic_object/curve.rb', line 19

def draw(canvas)
  canvas.move_to(@start[0], @start[1])
  canvas.curve_to(@c1[0], @c1[1], @c2[0], @c2[1],
                  @endpoint[0], @endpoint[1])
  canvas
end