module STL

Public Class Methods

read(filename) click to toggle source

Read an STL file @param filename [String] The path to the file to read @return [STL] the resulting {STL} object

# File lib/stl.rb, line 7
def self.read(filename)
    File.open(filename, 'r') {|f| STL::Parser.parse(f) }
end

write(filename, faces, format=:binary) click to toggle source

Write to an STL file @param filename [String] The path to write to @param faces [Array] An array of faces to write: [[Normal, Triangle], …] @param format [Symbol] Pass :ascii to write an ASCII formatted file, and :binary to write a binary file

# File lib/stl.rb, line 15
def self.write(filename, faces, format=:binary)
    File.open(filename, 'w') do |file|
        if format == :ascii
            file.puts 'solid '
            faces.each do |normal, triangle|
                file.puts "    facet normal %E %E %E" % [*normal]
                file.puts "\touter loop"
                triangle.points.each do |point|
                    file.puts "\t    vertex %E %E %E" % [*point]
                end
                file.puts "\tendloop"
                file.puts '    endfacet'
            end
            file.puts 'endsolid '
        elsif format == :binary
            file.write 'STL Ruby'.ljust(80, "\0") # A meager header
            file.write [faces.length].pack('V')   # The triangle count

            faces.each do |normal, triangle|
                file.write normal.to_a.pack("FFF")

                triangle.points.each do |point|
                    file.write point.to_a.pack("FFF")
                end

                file.write "\0\0"
            end
        end
    end
end