Module: XRVG::GeoVariety

Included in:
FuseauVariety, InterBezier, OffsetVariety
Defined in:
lib/geovariety.rb

Overview

GeoVariety abstract module

Principle

Base module to define geometrical spaces or canvas different from simple euclidean one to draw curves on. It provides three different services:

  • point computation

  • geodesic computation

  • arbitrary bezier computation, this one by computing sampling of euclidean curve on the variety, and then fitting point sequence with FitBezierBuilder

Instance Method Summary collapse

Instance Method Details

#bezier(pointrange, bezier) ⇒ Object

see GeoVariety module description for algorithm



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# File 'lib/geovariety.rb', line 32

def bezier( pointrange, bezier )
  bezier = bezier.similar( pointrange )
  points = bezier.samples( 20 )
  points = points.map {|point| self.point( point )}
  return FitBezierBuilder[ :points, points ]
end

#line(x1, x2, y) ⇒ Object

must be overriden

Raises:

  • (NotImplementedError) 


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# File 'lib/geovariety.rb', line 27

def line( x1, x2, y )
  raise NotImplementedError.new("#{self.class.name}#line is an abstract method.")
end

#point(point) ⇒ Object

must be overriden

Raises:

  • (NotImplementedError) 


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# File 'lib/geovariety.rb', line 22

def point( point )
  raise NotImplementedError.new("#{self.class.name}#point is an abstract method.")
end