Class: CyberarmEngine::WavefrontParser

Inherits:
Model::Parser show all
Defined in:
lib/cyberarm_engine/model/parsers/wavefront_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 



3
4
5
 
# File 'lib/cyberarm_engine/model/parsers/wavefront_parser.rb', line 3

def self.handles
  [:obj]
end

Instance Method Details

#add_normal(array) ⇒ Object 



128
129
130
131
132
133
134
135
136
137
138
139
 
# File 'lib/cyberarm_engine/model/parsers/wavefront_parser.rb', line 128

def add_normal(array)
  vert = nil
  if array.size == 5
    vert = Vector.new(Float(array[1]), Float(array[2]), Float(array[3]), Float(array[4]))
  elsif array.size == 4
    vert = Vector.new(Float(array[1]), Float(array[2]), Float(array[3]), 1.0)
  else
    raise
  end
  @model.current_object.normals << vert
  @model.normals << vert
end

#add_texture_coordinate(array) ⇒ Object 



141
142
143
144
145
146
147
148
149
150
151
152
 
# File 'lib/cyberarm_engine/model/parsers/wavefront_parser.rb', line 141

def add_texture_coordinate(array)
  texture = nil
  if array.size == 4
    texture = Vector.new(Float(array[1]), 1 - Float(array[2]), Float(array[3]))
  elsif array.size == 3
    texture = Vector.new(Float(array[1]), 1 - Float(array[2]), 1.0)
  else
    raise
  end
  @model.uvs << texture
  @model.current_object.uvs << texture
end

#add_vertex(array) ⇒ Object 



114
115
116
117
118
119
120
121
122
123
124
125
126
 
# File 'lib/cyberarm_engine/model/parsers/wavefront_parser.rb', line 114

def add_vertex(array)
  @model.vertex_count += 1
  vert = nil
  if array.size == 5
    vert = Vector.new(Float(array[1]), Float(array[2]), Float(array[3]), Float(array[4]))
  elsif array.size == 4
    vert = Vector.new(Float(array[1]), Float(array[2]), Float(array[3]), 1.0)
  else
    raise
  end
  @model.current_object.vertices << vert
  @model.vertices << vert
end

#parse ⇒ Object 



7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
 
# File 'lib/cyberarm_engine/model/parsers/wavefront_parser.rb', line 7

def parse
  lines = 0
  list = File.read(@model.file_path).split("\n")
  list.each do |line|
    lines += 1
    line = line.strip

    array = line.split(" ")
    case array[0]
    when "mtllib"
      @model.material_file = array[1]
      parse_mtllib
    when "usemtl"
      set_material(array[1])
    when "o"
      change_object(nil, array[1])
    when "s"
      set_smoothing(array[1])
    when "v"
      add_vertex(array)
    when "vt"
      add_texture_coordinate(array)

    when "vn"
      add_normal(array)

    when "f"
      verts = []
      uvs   = []
      norms = []
      array[1..3].each do |f|
        verts << f.split("/")[0]
        uvs   << f.split("/")[1]
        norms << f.split("/")[2]
      end

      face = Face.new
      face.vertices = []
      face.uvs      = []
      face.normals  = []
      face.colors   = []
      face.material = current_material
      face.smoothing = @model.smoothing

      mat   = face.material.diffuse
      color = mat

      verts.each_with_index do |v, index|
        if uvs.first != ""
          face.vertices << @model.vertices[Integer(v) - 1]
          face.uvs      << @model.uvs[Integer(uvs[index]) - 1]
          face.normals  << @model.normals[Integer(norms[index]) - 1]
          face.colors   << color
        else
          face.vertices << @model.vertices[Integer(v) - 1]
          face.uvs      << nil
          face.normals  << @model.normals[Integer(norms[index]) - 1]
          face.colors   << color
        end
      end

      @model.current_object.faces << face
      @model.faces << face
    end
  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_mtllib ⇒ Object 



79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
 
# File 'lib/cyberarm_engine/model/parsers/wavefront_parser.rb', line 79

def parse_mtllib
  file = File.open(@model.file_path.sub(File.basename(@model.file_path), "") + @model.material_file, "r")
  file.readlines.each do |line|
    array = line.strip.split(" ")
    case array.first
    when "newmtl"
      material = Model::Material.new(array.last)
      @model.current_material = array.last
      @model.materials[array.last] = material
    when "Ns" # Specular Exponent
    when "Ka" # Ambient color
      @model.materials[@model.current_material].ambient  = Color.new(Float(array[1]), Float(array[2]),
                                                                     Float(array[3]))
    when "Kd" # Diffuse color
      @model.materials[@model.current_material].diffuse  = Color.new(Float(array[1]), Float(array[2]),
                                                                     Float(array[3]))
    when "Ks" # Specular color
      @model.materials[@model.current_material].specular = Color.new(Float(array[1]), Float(array[2]),
                                                                     Float(array[3]))
    when "Ke" # Emissive
    when "Ni" # Unknown (Blender Specific?)
    when "d"  # Dissolved (Transparency)
    when "illum" # Illumination model
    when "map_Kd" # Diffuse texture
      texture = File.basename(array[1])
      texture_path = "#{File.expand_path('../../', @model.file_path)}/textures/#{texture}"
      @model.materials[@model.current_material].set_texture(texture_path)
    end
  end
end

#set_smoothing(value) ⇒ Object 



110
111
112
 
# File 'lib/cyberarm_engine/model/parsers/wavefront_parser.rb', line 110

def set_smoothing(value)
  @model.smoothing = value == "1"
end