Decision Theature North - width of screens fun

0.DTN Width Script

See the picture and more details about this on my Google+ post over at:

https://plus.google.com/+DayneBroderson/posts/V21SUJhgEGB

The real room is a width 21' 5 3/4''.

2.compute_dtn_room_width.rb

#!/usr/bin/ruby
include Math

def total_7screen_dtn_width( w, a )
  r = a * Math::PI / 180  # angle in radians
  w2 = w*cos(r)
  w3 = w*cos(r*2)

  total = w + 2*(w2 + w3)
end

screens = [
  { :size => 65, :width => 57.7 },
  { :size => 70, :width => 61.4 },
  { :size => 75, :width => 66.5 },
  { :size => 85, :width => 74.9 }
]

angles = [ 20, 25, 30 ]


angles.each do |angle|
    puts "A 7 Screen DTN with Angle: #{angle}"
    screens.each do |s|
      tw = total_7screen_dtn_width( s[:width], angle )
      tw_feet = tw / 12.0
      puts "\t#{s[:size]}'' screen size is #{ sprintf( "%.3f", tw_feet) } feet wide total"
    end
end

3.results

A 7 Screen DTN with Angle: 20
	65'' screen size is 21.212 feet wide total
	70'' screen size is 22.572 feet wide total
	75'' screen size is 24.447 feet wide total
	85'' screen size is 27.535 feet wide total
A 7 Screen DTN with Angle: 25
	65'' screen size is 19.705 feet wide total
	70'' screen size is 20.969 feet wide total
	75'' screen size is 22.711 feet wide total
	85'' screen size is 25.580 feet wide total
A 7 Screen DTN with Angle: 30
	65'' screen size is 17.945 feet wide total
	70'' screen size is 19.096 feet wide total
	75'' screen size is 20.682 feet wide total
	85'' screen size is 23.294 feet wide total

screen options.md

Samsung - 65 or 75 - 4K UHD JU7100 Series Smart TV

• http://www.samsung.com/us/video/tvs/UN75JU7100FXZA
• Spec sheet with full w x h x l options for 65'' or 75'' screens on page 4 of spec sheet
• http://www.samsung.com/us/system/consumer/product/un/75/ju/un75ju7100fxza/TV_JU7100_SpecSheet_3-17-15.pdf
• Uses a 400 mm x 400 mm VESA mount
• 65'' is 57.6'' width and the 75'' is 66.5''