Class: CTioga2::Graphics::CoordinateTransforms

Inherits:
Object
  • Object
show all
Defined in:
lib/ctioga2/graphics/coordinates.rb

Overview

Deals with transforming the coordinates of all datasets

TODO:

  • offsets

  • scales

  • x/y log

  • non-linear transformations ?

  • the possibility to provide locations using this.

  • conversion of datasets.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CoordinateTransforms

Creates a CoordinateTransformations object.



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# File 'lib/ctioga2/graphics/coordinates.rb', line 45

def initialize
end

Instance Attribute Details

#x_log ⇒ Object

Whether to use logarithmic coordinates



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# File 'lib/ctioga2/graphics/coordinates.rb', line 42

def x_log
  @x_log
end

#x_offset ⇒ Object

An offset for coordinates



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# File 'lib/ctioga2/graphics/coordinates.rb', line 39

def x_offset
  @x_offset
end

#x_scale ⇒ Object

A scaling factor for coordinates:



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# File 'lib/ctioga2/graphics/coordinates.rb', line 36

def x_scale
  @x_scale
end

#y_log ⇒ Object

Whether to use logarithmic coordinates



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# File 'lib/ctioga2/graphics/coordinates.rb', line 42

def y_log
  @y_log
end

#y_offset ⇒ Object

An offset for coordinates



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# File 'lib/ctioga2/graphics/coordinates.rb', line 39

def y_offset
  @y_offset
end

#y_scale ⇒ Object

A scaling factor for coordinates:



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# File 'lib/ctioga2/graphics/coordinates.rb', line 36

def y_scale
  @y_scale
end

Instance Method Details

#transform_2d!(dataset) ⇒ Object

Apply a transformation to a Data::Dataset holding 2D signals. Modifies the dataset in place.



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# File 'lib/ctioga2/graphics/coordinates.rb', line 50

def transform_2d!(dataset)
  for w in [:x , :y]
    if v = self.send("#{w}_scale") 
      dataset.send(w).apply do |x|
        x.mul!(v)
      end
    end
    if v = self.send("#{w}_offset") 
      dataset.send(w).apply do |x|
        x.add!(v)
      end
    end
    if v = self.send("#{w}_log") 
      dataset.send(w).apply do |x|
        x.safe_log10!
      end
    end
  end
end