Computercraft Center API

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--Center-API-by-jack-------------------------------
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--                --How to use--
-- Enter this function to include this API
--
-- os.loadAPI( enter here path to this API )
--
--
--                --Functions--
--
-- Function: CentralWrite(y,text)
--
-- Description: Draws text on Center of Screen on
-- different y
--
-- Example: CentralWrite(5,"hello") - writes hello
-- on center of line #5
--
--
-- Function: GetScrCenterX(pixels)
--
-- Description: Returns Center of Screen for
-- Centered text or any needs (returns two poses
-- start and end of center)
--
-- Example: GetScrCenterX(4) - returns two points
-- of center to draw line or text with size
-- 4 pixels
--
--
-- Function: GetScrCenterY(pixels)
--
-- Description: Works as well as GetScrCenterX ,but
-- gets two points of y center
--
-- Example: GetScrCenterY(3) - returns two points
-- of center on Y axys for 3 pixels
--
--
-- Function: GetCenter(start pos,end pos,pixels)
--
-- Description: Works as well as GetScrCenterX or
-- GetScrCenterY ,but gets center two points with
-- using entered start and end pos
--
-- Example: GetCenter(2,8,2) - gets two center
-- points of entered here points of x axys
--
--              --The End--
--        --Sorry for bad english--
--        --Code of this api here--
--         \/\/\/\/\/\/\/\/\/\/\/\/
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function CentralWrite(y,text)
  scrX = term.getSize()
  x = (scrX/2)-(#text/2)
  term.setCursorPos(x,y)
  write(text)
end

function GetScrCenterX(pixels)
  scrX = term.getSize()
  x = (scrX/2)-(pixels/2)
  x2 = x+pixels-1
  return x,x2
end


function GetScrCenterY(pixels)
  scrX,scrY = term.getSize()
  y = (scrY/2)-(pixels/2)
  y2 = y+pixels-1
  return y
end

function GetCenter(SP,EP,pixels)
 Center = math.floor(SP+((EP-SP)/2)-pixels/2)
 CenterP2 = Center+pixels-1
 return Center,CenterP2
end