Class: Ra::Surface

Inherits:
Object
  • Object
show all
Defined in:
lib/ra/surface.rb

Overview

A surface contains everything needed to apply lighting.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(eyev:, normalv:, reflectv:, shape:, point:) ⇒ Surface

Returns a new instance of Surface.

Parameters:

  • eyev (Vector)
  • normalv (Vector)
  • shape (Ra::Shape)
  • point (Vector) 


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# File 'lib/ra/surface.rb', line 30

def initialize(eyev:, normalv:, reflectv:, shape:, point:)
  @eyev = eyev
  @normalv = normalv.dot(eyev).negative? ? -normalv : +normalv
  @reflectv = reflectv
  @shape = shape
  @point = point
end

Instance Attribute Details

#eyev ⇒ Vector

Returns:

  • (Vector) 


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# File 'lib/ra/surface.rb', line 8

def eyev
  @eyev
end

#normalv ⇒ Vector

Returns:

  • (Vector) 


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# File 'lib/ra/surface.rb', line 12

def normalv
  @normalv
end

#point ⇒ Vector

Returns:

  • (Vector) 


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# File 'lib/ra/surface.rb', line 24

def point
  @point
end

#reflectv ⇒ Vector

Returns:

  • (Vector) 


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# File 'lib/ra/surface.rb', line 16

def reflectv
  @reflectv
end

#shape ⇒ Ra::Shape

Returns:



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# File 'lib/ra/surface.rb', line 20

def shape
  @shape
end

Instance Method Details

#hpoint ⇒ Vector

Returns:

  • (Vector) 


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# File 'lib/ra/surface.rb', line 39

def hpoint
  @hpoint ||= point + (normalv * EPSILON)
end