Class: CyberarmEngine::ColladaParser

Inherits:
Model::Parser show all
Defined in:
lib/cyberarm_engine/model/parsers/collada_parser.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Model::Parser

#add_material, #change_object, #current_material, find, inherited, #initialize, #set_material, #set_object, supported_formats

Constructor Details

This class inherits a constructor from CyberarmEngine::Model::Parser

Class Method Details

.handles ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 3

def self.handles
  [:dae]
end

Instance Method Details

#build_faces(_id, mesh) ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 100

def build_faces(_id, mesh)
  material_name = mesh.at_css("triangles").attributes["material"].value
  set_material(material_name)

  positions_index = []
  normals_index = []
  uvs_index = []

  mesh.at_css("triangles p").children.first.to_s.split(" ").map { |i| Integer(i) }.each_slice(3).each do |slice|
    positions_index << slice[0]
    normals_index << slice[1]
    uvs_index << slice[2]
  end

  norm_index = 0
  positions_index.each_slice(3) do |slice|
    face = Face.new
    face.vertices = []
    face.uvs      = []
    face.normals  = []
    face.colors   = []
    face.material = current_material
    face.smoothing = @model.smoothing

    slice.each do |index|
      face.vertices << @model.vertices[index]
      # face.uvs << @model.uvs[index]
      face.normals << @model.normals[normals_index[norm_index]]
      face.colors << current_material.diffuse

      norm_index += 1
    end

    @model.current_object.faces << face
    @model.faces << face
  end
end

#get_normals(id, mesh) ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 67

def get_normals(id, mesh)
  normals = mesh.at_css("[id=\"#{id}-normals\"]")
  array = normals.at_css("[id=\"#{id}-normals-array\"]")

  stride = Integer(normals.at_css("[source=\"##{id}-normals-array\"]").attributes["stride"].value)
  list = array.children.first.to_s.split(" ").map { |f| Float(f) }.each_slice(stride).each do |slice|
    normal = Vector.new(*slice)
    @model.current_object.normals << normal
    @model.normals << normal
  end
end

#get_positions(id, mesh) ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 55

def get_positions(id, mesh)
  positions = mesh.at_css("[id=\"#{id}-positions\"]")
  array = positions.at_css("[id=\"#{id}-positions-array\"]")

  stride = Integer(positions.at_css("[source=\"##{id}-positions-array\"]").attributes["stride"].value)
  list = array.children.first.to_s.split(" ").map { |f| Float(f) }.each_slice(stride).each do |slice|
    position = Vector.new(*slice)
    @model.current_object.vertices << position
    @model.vertices << position
  end
end

#get_texture_coordinates(id, mesh) ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 79

def get_texture_coordinates(id, mesh)
end

#parse ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 7

def parse
  @collada = Nokogiri::XML(File.read(@model.file_path))

  @collada.css("library_materials material").each do |material|
    parse_material(material)
  end

  @collada.css("library_geometries geometry").each do |geometry|
    parse_geometry(geometry)
  end

  @model.calculate_bounding_box(@model.vertices, @model.bounding_box)
  @model.objects.each do |o|
    @model.calculate_bounding_box(o.vertices, o.bounding_box)
  end
end

#parse_geometry(geometry) ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 39

def parse_geometry(geometry)
  geometry_id = geometry.attributes["id"].value
  geometry_name = geometry.attributes["name"].value

  change_object(geometry_id, geometry_name)

  mesh = geometry.at_css("mesh")

  get_positions(geometry_id, mesh)
  get_normals(geometry_id, mesh)
  get_texture_coordinates(geometry_id, mesh)

  project_node(geometry_name)
  build_faces(geometry_id, mesh)
end

#parse_material(material) ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 24

def parse_material(material)
  name = material.attributes["id"].value
  effect_id = material.at_css("instance_effect").attributes["url"].value

  mat = Model::Material.new(name)
  effect = @collada.at_css("[id=\"#{effect_id.sub('#', '')}\"]")

  emission = effect.at_css("emission color")
  diffuse = effect.at_css("diffuse color").children.first.to_s.split(" ").map { |c| Float(c) }

  mat.diffuse = Color.new(*diffuse[0..2])

  add_material(name, mat)
end

#project_node(name) ⇒ Object 



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# File 'lib/cyberarm_engine/model/parsers/collada_parser.rb', line 82

def project_node(name)
  @collada.css("library_visual_scenes visual_scene node").each do |node|
    next unless node.attributes["name"].value == name

    transform = Transform.new(node.at_css("matrix").children.first.to_s.split(" ").map { |f| Float(f) })

    @model.current_object.vertices.each do |vert|
      v = vert.multiply_transform(transform)
      vert.x = v.x
      vert.y = v.y
      vert.z = v.z
      vert.w = v.w
    end

    break
  end
end