Module: SolidRuby::ScrewThreads

Included in:
SolidRuby
Defined in:
lib/solidruby/screw_thread.rb

Overview

This file is part of SolidRuby.

SolidRuby is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

SolidRuby is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with SolidRuby.  If not, see <http://www.gnu.org/licenses/>.

Defined Under Namespace

Classes: ScrewThread

Instance Method Summary collapse

Instance Method Details

#create_bolts(face, obj1, obj2, args = {}) ⇒ Object 



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# File 'lib/solidruby/screw_thread.rb', line 79

def create_bolts(face, obj1, obj2, args = {})
  # make a obj1-=obj2 with bolts corresponding to the height of obj1

  if face.nil? || obj1.nil? || obj2.nil?
    raise 'usage: create_bolts(face,obj1,obj2,args={})  - args can include (obj1.)height and bolt_height'
    return
  end

  # we need to know obj1 height (if not supplied by user)
  #TODO: Rescuing like this is not good practise
  height ||= args[:height]
  case face.to_s
  when 'top'
    height ||= obj1.z rescue nil
  when 'bottom'
    height ||= obj1.z rescue nil
  when 'left'
    height ||= obj1.x rescue nil
  when 'right'
    height ||= obj1.x rescue nil
  when 'front'
    height ||= obj1.y rescue nil
  when 'back'
    height ||= obj1.y rescue nil
  end
  height ||= obj1.height rescue nil

  if height.nil?
    raise "the object we're substracting from doesn't have a height defined; please define manually"
    return
  end

  # lets check if the obj2 responds to the threads_[face] method

  meth = "threads_#{face}"

  unless obj2.respond_to?(meth)
    raise "The object you're trying to get bolts from doesn't supply any on the face '#{face}'. Please add a method #{meth} to this object"
    return
  end
  holes = obj2.send(meth)

  return if holes.nil?

  # let the user either define bolt_heights as integer, array or none (will be guessed)
  if args[:bolt_height].is_a? Array
    bolt_heights = args[:bolt_height]
    if bolt_heights.size != holes.size
      raise "object has #{holes.size} threads for bolts but you supplied #{bolt_heights.size}"
      return
    end
  else
    bolt_heights = []
    holes.each do |hole|
      bolt_heights << if args[:bolt_height]
                        args[:bolt_height]
                      else
                        (height + hole.depth).floor
                      end
    end
  end

  ret = []
  holes.each_with_index do |hole, i|
    bolt = Bolt.new(hole.size, bolt_heights[i], washer: args[:washer])
    case face
    when 'top'
      bolt.transformations << Rotate.new(x: 180)
      bolt.transformations << Translate.new(x: hole.x, y: hole.y, z: hole.z + height)
    when 'bottom'
      bolt.transformations << Translate.new(x: hole.x, y: hole.y, z: hole.z)
    when 'left'
      bolt.transformations << Rotate.new(y: 90)
      bolt.transformations << Translate.new(x: hole.x, y: hole.y, z: hole.z)
    when 'right'
      bolt.transformations << Rotate.new(y: -90)
      bolt.transformations << Translate.new(x: hole.x + height, y: hole.y, z: hole.z)
    when 'front'
      bolt.transformations << Rotate.new(x: -90)
      bolt.transformations << Translate.new(x: hole.x, y: hole.y, z: hole.z)
    when 'back'
      bolt.transformations << Rotate.new(x: 90)
      bolt.transformations << Translate.new(x: hole.x, y: hole.y + height, z: hole.z)
    end
    bolt.transformations += obj2.transformations unless obj2.transformations.nil?

    ret << bolt
  end

  ret
end