Class: Tioga::Arcs_and_Circles

Inherits:
Object
  • Object
show all
Defined in:
lib/Tioga/Arcs_and_Circles.rb

Overview

These are the methods for creating and using arcs and circles in PDF graphics.

Instance Method Summary collapse

Instance Method Details

#append_arc_to_path(x_start, y_start, x_corner, y_corner, x_end, y_end, dx, dy) ⇒ Object

Like adding lines from start to corner to end, but with the corner rounded with a radius equal to the minimum of the actual output distances for dx and dy.

The illustration shows in dark blue the arc that is added for the control points given in red.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 16

def append_arc_to_path(x_start, y_start, x_corner, y_corner, x_end, y_end, dx, dy)
end

#append_circle_to_path(x, y, r) ⇒ Object

Create a circle with center at (x, y) having radius r (given in x units).



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 20

def append_circle_to_path(x, y, r)
end

#append_oval_to_path(x, y, dx, dy, angle) ⇒ Object

Equivalent to the following: create a unit circle with center at (x, y), scale it by dx in the x direction, scale it by dy in the y direction, then rotate it counter-clockwise by angle degrees.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 41

def append_oval_to_path(x, y, dx, dy, angle)
end

#clip_circle(x, y, r) ⇒ Object

Calls append_circle_to_path followed by #clip.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 24

def clip_circle(x, y, r)
end

#clip_oval(x, y, dx, dy, angle) ⇒ Object

Calls append_oval_to_path followed by #clip.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 45

def clip_oval(x, y, dx, dy, angle)
end

#fill_and_stroke_circle(x, y, r) ⇒ Object

Calls append_circle_to_path followed by fill_and_stroke.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 36

def fill_and_stroke_circle(x, y, r)
end

#fill_and_stroke_oval(x, y, dx, dy, angle) ⇒ Object

Calls append_oval_to_path followed by fill_and_stroke.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 57

def fill_and_stroke_oval(x, y, dx, dy, angle)
end

#fill_circle(x, y, r) ⇒ Object

Calls append_circle_to_path followed by #fill.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 28

def fill_circle(x, y, r)
end

#fill_oval(x, y, dx, dy, angle) ⇒ Object

Calls append_oval_to_path followed by #fill.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 49

def fill_oval(x, y, dx, dy, angle)
end

#stroke_circle(x, y, r) ⇒ Object

Calls append_circle_to_path followed by #stroke.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 32

def stroke_circle(x, y, r)
end

#stroke_oval(x, y, dx, dy, angle) ⇒ Object

Calls append_oval_to_path followed by #stroke.



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# File 'lib/Tioga/Arcs_and_Circles.rb', line 53

def stroke_oval(x, y, dx, dy, angle)
end