ObjParser

Parse a 3D obj file to a ruby data structure. Can compute tangent per vertex. Can merge vertice, normals, and textures indexes into a single index for OpenGL use case.

  • Support triangle primitives
  • Support only one model per obj file
  • Did not support materials

Installation

Add this line to your application's Gemfile:

gem 'obj_parser'

And then execute:

$ bundle

Or install it yourself as:

$ gem install obj_parser

Usage

Sample to parse an obj file, generate tangents and transform to a single indexed 3D model.

@parser = ObjParser::ObjParser.new
obj = @parser.load(File.open("/Users/lcobos/development/ios/OpenGL-4/models/cube.obj"))
obj.compute_tangents
obj = ObjParser::SingleIndexedObj.build_with_obj(obj)

puts obj.vertice.map(&:data).join(",")
puts obj.normals.map(&:data).join(",")
puts obj.textures.map(&:data).join(",")
puts obj.tangents.map(&:data).join(",")
puts obj.indexes.join(",")

Contributing

  1. Fork it ( http://github.com//obj_parser/fork )
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request