Module: RFPDF::Math

Included in:
TCPDF
Defined in:
lib/plugins/rfpdf/lib/rfpdf/math.rb

Overview

Various mathematical calculations extracted from the PDF::Writer for Ruby gem.

Constant Summary

PI2 = 
::Math::PI * 2.0
DR =

One degree of arc measured in terms of radians.

PI2 / 360.0
RD =

One radian of arc, measured in terms of degrees.

360 / PI2
DG =

One degree of arc, measured in terms of gradians.

400 / 360.0
GD =

One gradian of arc, measured in terms of degrees.

360 / 400.0
RG =

One radian of arc, measured in terms of gradians.

400 / PI2
GR =

One gradian of arc, measured in terms of radians.

PI2 / 400.0

Instance Method Summary (collapse)

Instance Method Details

- (Object) deg2deg(deg)

Wrap degree values within the range of degrees (0..360).



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 34

def deg2deg(deg)
  remt(deg, 360)
end

- (Object) deg2grad(deg, wrap = true)

Convert degrees to gradians. The value will be constrained to the range of gradians (0..400) unless wrap is false.



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 53

def deg2grad(deg, wrap = true)
  grad = DG * deg
  grad = grad2grad(grad) if wrap
  grad
end

- (Object) deg2rad(deg, wrap = true)

Convert degrees to radians. The value will be constrained to the range of radians (0..PI2) unless wrap is false.



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 45

def deg2rad(deg, wrap = true)
  rad = DR * deg
  rad = rad2rad(rad) if wrap
  rad
end

- (Object) grad2deg(grad, wrap = true)

Convert gradians to degrees. The value will be constrained to the range of degrees (0..360) unless wrap is false.



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 77

def grad2deg(grad, wrap = true)
  deg = GD * grad
  deg = deg2deg(deg) if wrap
  deg
end

- (Object) grad2grad(grad)

Wrap gradian values within the range of gradians (0..400).



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 39

def grad2grad(grad)
  remt(grad, 400)
end

- (Object) grad2rad(grad, wrap = true)

Convert gradians to radians. The value will be constrained to the range of radians (0..PI2) unless wrap is false.



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 85

def grad2rad(grad, wrap = true)
  rad = GR * grad
  rad = rad2rad(rad) if wrap
  rad
end

- (Object) rad2deg(rad, wrap = true)

Convert radians to degrees. The value will be constrained to the range of degrees (0..360) unless wrap is false.



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 61

def rad2deg(rad, wrap = true)
  deg = RD * rad
  deg = deg2deg(deg) if wrap
  deg
end

- (Object) rad2grad(rad, wrap = true)

Convert radians to gradians. The value will be constrained to the range of gradians (0..400) unless wrap is false.



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 69

def rad2grad(rad, wrap = true)
  grad = RG * rad
  grad = grad2grad(grad) if wrap
  grad
end

- (Object) rad2rad(rad)

Wrap radian values within the range of radians (0..PI2).



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 29

def rad2rad(rad)
  remt(rad, PI2)
end

- (Object) remt(num, den)

Truncate the remainder.



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# File 'lib/plugins/rfpdf/lib/rfpdf/math.rb', line 24

def remt(num, den)
  num - den * (num / den.to_f).to_i
end