Class: Mittsu::MTLLoader::MaterialCreator

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

Instance Method Summary collapse

Constructor Details

#initialize(base_url, options = nil) ⇒ MaterialCreator

Returns a new instance of MaterialCreator.



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 54

def initialize(base_url, options = nil)
  @base_url = base_url
  @options = options
  @material_info = {}
  @materials = {}
  @materials_array = []
  @name_lookup = {}

  @side = (@options || {}).fetch(:side, FrontSide)
  @wrap = (@options || {}).fetch(:wrap, RepeatWrapping)
end

Instance Method Details

#convert(materials_info) ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 73

def convert(materials_info)
  return materials_info if !@options

  converted = {}

  materials_info.each do |mn, mat|
    covmat = converted[mn] ={}

    mat.each do |prop, value|
      save = true
      lprop = prop.to_s.downcase

      case lprop
      when 'kd', 'ka', 'ks'
        # Diffuse color, (color under white light) using RGB values

        if @options && @options[:normalize_rgb]
          value = [value[0] / 255.0, value[1] / 255.0, value[2] / 255.0]
        end

        if @options && @options[:ignore_zero_rgbs]
          if value.take(3).all?(&:zero?)
            # ignore
            save = false
          end
        end
      when 'd'
		# According to MTL format (http://paulbourke.net/dataformats/mtl/):
		#   d is dissolve for current material
		#   factor of 1.0 is fully opaque, a factor of 0 is fully dissolved (completely transparent)

        if @options && @options[:invert_transparency]
          value = 1.0 - value.to_f
        end
      end

      covmat[lprop] = value if save
    end
  end

  converted
end

#create(material_name) ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 135

def create(material_name)
  if @materials[material_name].nil?
    create_material(material_name)
  end

  @materials[material_name]
end

#get_as_array ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 126

def get_as_array
  @materials_info.keys.each_with_index do |mn, index|
    @materials_array[index] = create mn
    @name_lookup[mn] = index
  end

  @materials_array
end

#get_index(material_name) ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 122

def get_index(material_name)
  @name_lookup[material_name]
end

#load_texture(url, mapping = nil) ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 143

def load_texture(url, mapping = nil)
  loader = Loader::Handlers.get(url)

  if !loader.nil?
    texture = loader.load url
  else
    texture = Texture.new

    loader = ImageLoader.new
    image = loader.load url

    texture.image = ensure_power_of_two(image)
    texture.needs_update = true
  end

  texture.mapping = mapping unless mapping.nil?

  texture
end

#preload ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 116

def preload
  @materials_info.each_key do |mn|
    create mn
  end
end

#set_materials(materials_info) ⇒ Object 



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# File 'lib/mittsu/loaders/mtl_loader.rb', line 66

def set_materials(materials_info)
  @materials_info = convert materials_info
  @materials = {}
  @materials_array = []
  @name_lookup = {}
end