Class: Mittsu::MTLLoader

Inherits:
Object
  • Object
show all
Includes:
EventDispatcher
Defined in:
lib/mittsu/loaders/mtl_loader.rb

Defined Under Namespace

Classes: MaterialCreator

Instance Method Summary collapse

Methods included from EventDispatcher

#add_event_listener, #dispatch_event, #has_event_listener, #remove_event_listener

Constructor Details

#initialize(base_url, options = {}) ⇒ MTLLoader

Returns a new instance of MTLLoader.



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 5

def initialize(base_url, options = {})
  @base_url = base_url
  @options = options
end

Instance Method Details

#load(url) ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 10

def load(url)
  loader = FileLoader.new

  text = loader.load File.join(@base_url, url)
  parse(text)
end

#parse(text) ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 17

def parse(text)
  lines = text.split("\n")
  info = {}
  delimiter_pattern = /\s+/
  materials_info = {}

  lines.each do |line|
	line = line.strip

	next if line.empty? || line.start_with?('#')

	pos = line.index(' ')

	key = ( pos >= 0 ) ? line[0...pos] : line
	key = key.downcase

	value = ( pos >= 0 ) ? line[pos + 1..-1] : ""
	value = value.strip

	if key == "newmtl"
		info = { name: value };
		materials_info[value] = info
	elsif info
		if key == "ka" || key == "kd" || key == "ks"
			info[key] = value.split(delimiter_pattern).take(3).map(&:to_f)
		else
			info[key] = value
		end
	end
  end

  MaterialCreator.new(@base_url, @options).tap do |material_creator|
    material_creator.set_materials(materials_info)
  end
end