Class: Collada::Conversion::TaggedFormat

Inherits:
Object
  • Object
show all
Defined in:
lib/collada/conversion/tagged_format.rb

Defined Under Namespace

Classes: GeometryError

Constant Summary collapse

TEXCOORD = 
lambda {|value| [value[:S], -value[:T] + 1.0]}
VERTEX_FORMATS = 
{
	"p3n3" => VertexFormat[position: [:X, :Y, :Z], normal: [:X, :Y, :Z]],
	"p3n3m2" => VertexFormat[position: [:X, :Y, :Z], normal: [:X, :Y, :Z], texcoord: TEXCOORD],
	"p3n3m2b2" => VertexFormat[position: [:X, :Y, :Z], normal: [:X, :Y, :Z], texcoord: TEXCOORD, bones: WeightFormat[4]],
	"p3n3m2b4" => VertexFormat[position: [:X, :Y, :Z], normal: [:X, :Y, :Z], texcoord: TEXCOORD, bones: WeightFormat[4]],
}

Instance Method Summary collapse

Constructor Details

#initialize(options, library, output = nil) ⇒ TaggedFormat

Returns a new instance of TaggedFormat.



17
18
19
20
21
22
23
24
25
26
27
 
# File 'lib/collada/conversion/tagged_format.rb', line 17

def initialize(options, library, output = nil)
	@options = options
	@library = library
		
	@output_vertex_format = VERTEX_FORMATS[@options[:vertex_format]]
		
	@output = output || $stdout
		
	@top = {}
	@nodes = {}
end

Instance Method Details

#dump ⇒ Object 



165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
 
# File 'lib/collada/conversion/tagged_format.rb', line 165

def dump
	@nodes = {}
		
	@library[:visual_scenes].each do |scene|
		scene.traverse do |node|
			$stderr.puts node.inspect.color(:blue)
	
			node.instances.each do |instance|
				case instance
				when Collada::Parser::VisualScene::GeometryInstance
					geometry = dump_geometry(scene, node, instance)
				when Collada::Parser::VisualScene::ControllerInstance
					geometry, skeleton = dump_controller(scene, node, instance)
				end
			end
		end

		if @options[:nodes]
			dump_nodes(scene.nodes)
		end
	end
		
	@output.puts "top: offset-table"
	@top.each do |name, label|
		@output.puts "	#{name}: $#{label}"
	end
	@output.puts "end"
end

#dump_controller(scene, node, instance) ⇒ Object 



87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
 
# File 'lib/collada/conversion/tagged_format.rb', line 87

def dump_controller(scene, node, instance)
	controller = instance.lookup(@library)
	if controller.bind_pose_transform != Matrix.identity(4)
		raise ArgumentError.new("Non-identity bind pose transform is not supported by this exporter!")
	end
		
	top_joint = scene[instance.skeleton.id]
	skeleton = Collada::Conversion::Skeleton.new(@library, scene, top_joint, controller)
		
	geometry = dump_geometry(scene, node, controller.source, skeleton)
		
	indexed_weights = skeleton.indexed_weights
		
	@output.puts "#{controller.id}: skeleton"
		
	indexed_bones = {}
	@output.puts "	bones: array skeleton-bone"
	skeleton.bones.each.with_index do |(parent, bone), index|
		indexed_bones[bone.id] = index
		@output.puts "		#{bone.id} #{parent.to_s.rjust(5)}\t#{bone.transform_matrix.to_a.flatten.join(' ')}"
	end
	@output.puts "	end"
		
	# Extract out the animations that transform the bones:
	channels = {}
	start_time = 0.0
	end_time = 0.0
	@library[:animations].each do |animation|
		animation.channels.each do |channel|
			channels[channel.target] = channel
	
			# Extract out the end time if possible:
			attributes = Collada::Parser::Attribute.to_hash(channel.source[-1])
			end_time = attributes[:input][:TIME] || 0.0
		end
	end
		
	@output.puts "	sequences: offset-table"
	@output.puts "		default: skeleton-animation #{start_time} #{end_time}"
	@output.puts "			key-frames: array skeleton-animation-key-frame"
	skeleton.bones.each do |(parent, bone)|
		channel = channels["#{bone.id}/transform"] || channels["#{bone.id}/matrix"]

		next unless channel

		channel.source.count.times do |index|
			attributes = Collada::Parser::Attribute.merge(channel.source[index])
			@output.puts "				" + [indexed_bones[bone.id], attributes[:INTERPOLATION].downcase, attributes[:TIME], attributes[:TRANSFORM].to_a].flatten.join(' ')
		end
	end
	@output.puts "			end"
	@output.puts "		end"
	@output.puts "	end"
		
	@output.puts "end"
		
	@top[controller.name || controller.id] = controller.id
		
	return geometry, skeleton
end

#dump_geometry(scene, node, instance, skeleton = nil) ⇒ Object 



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
78
79
80
81
82
83
84
85
 
# File 'lib/collada/conversion/tagged_format.rb', line 35

def dump_geometry(scene, node, instance, skeleton = nil)
	vertex_format = @output_vertex_format.with_vertex_index
	geometry = instance.lookup(@library)
		
	mesh = Mesh.new
		
	weights = skeleton.indexed_weights if skeleton
		
	geometry.mesh.polygons.each do |polygon|
		if polygon.count != 3
			raise GeometryError.new("Non-triangular surfaces ")
		end
		
		polygon.each do |vertex_attributes|
			vertex = Collada::Conversion::Vertex.new(vertex_attributes, vertex_format)
	
			vertex.attributes[:bones] = weights[vertex.index] if weights
	
			mesh << vertex
		end
	end

	@output.puts "#{geometry.id}: mesh triangles"

	@output.puts "	indices: array index16"
	mesh.indices.each_slice(12) do |indices|
		@output.puts "		#{indices.flatten.collect{|i| i.to_s.rjust(5)}.join}"
	end
	@output.puts "	end"
		
	@output.puts "	vertices: array vertex-#{@options[:vertex_format]}"
	mesh.vertices.size.times do |index|
		vertex = mesh.indexed[index]
		@output.puts "		#{vertex.to_a(@output_vertex_format).collect{|v| v.to_s.rjust(12)}.join(' ')}"
	end
	@output.puts "	end"
		
	axes = extract_axes(scene, node, instance)

	@output.puts "	axes: array axis"
	axes.each do |axis|
		@output.puts "		#{axis.collect{|i| i.to_s.rjust(12)}.join(' ')}"
	end
	@output.puts "	end"
		
	@output.puts "end"
		
	@top[geometry.name || geometry.id] = geometry.id
		
	return geometry
end

#dump_instances(instances, indent = "") ⇒ Object 



148
149
 
# File 'lib/collada/conversion/tagged_format.rb', line 148

def dump_instances(instances, indent = "")
end

#dump_nodes(nodes, indent = "") ⇒ Object 



151
152
153
154
155
156
157
158
159
160
161
162
163
 
# File 'lib/collada/conversion/tagged_format.rb', line 151

def dump_nodes(nodes, indent = "")
	nodes.each do |node|
		next unless node.type == :node

		@output.puts indent + "node #{node.id}"
		@output.puts indent + "	#{node.local_transform_matrix.to_a.flatten.join(' ')}"

		dump_instances(node.instances, indent + "\t")
		dump_nodes(node.children, indent + "\t")

		@output.puts indent + "end"
	end
end

#extract_axes(scene, node, instance) ⇒ Object 



29
30
31
32
33
 
# File 'lib/collada/conversion/tagged_format.rb', line 29

def extract_axes(scene, node, instance)
	node.children.collect do |child|
		[child.name, *Transforms.extract_axis(child.local_transform_matrix)]
	end
end