require ("physics")
local ui = require("ui")
 
physics.start()
physics.setDrawMode ( "hybrid" ) -- Uncomment in order to show in hybrid mode   
physics.setGravity( 0, 9.8 * 2)
 
physics.start()
 
local bats = {}
 
function main()
        display.setStatusBar( display.HiddenStatusBar )
        Runtime:addEventListener("touch", drawBat)
end
 
local function angleBetween ( srcObj, dstObj )
        local xDist = dstObj.x-srcObj.x ; local yDist = dstObj.y-srcObj.y
        local angleBetween = math.deg( math.atan( yDist/xDist ) )
        if (srcObj.x < dstObj.x) then
                angleBetween = angleBetween+90
        else
                angleBetween = angleBetween-90
        end
        return angleBetween
end
 
local function distanceBetween( point1, point2 )
        local xfactor = point2.x-point1.x ; local yfactor = point2.y-point1.y
        local distanceBetween = math.sqrt((xfactor*xfactor) + (yfactor*yfactor))
        return distanceBetween
end
 
local function createBatsBody( line, ending, type, props )
        local length = distanceBetween( line, ending )
        local angle = angleBetween( line, ending ) + 90
        
        local rect = display.newRect( 0, 0, length, line.width )
        rect.rotation = angle
        rect.x, rect.y = line.x + (ending.x-line.x)/2, line.y + (ending.y-line.y)/2
        
        props.shape = shape
        
        physics.addBody( rect, type, props )
        line:removeSelf()
        return rect
end
 
local delayRemoveLine = function( event )
        event:removeSelf()
end
 
function drawBat( event )
        if (event.phase == "began") then
                local bat = display.newLine( event.x, event.y, event.x, event.y )
                bat.width = 20
                table.insert( bats, 1, bat )
        elseif (event.phase == "moved") then
                local bat = display.newLine( bats[1].x, bats[1].y, event.x, event.y )
                bat.width = 20
                bats[1]:removeSelf()
                bats[1] = bat
        else
                if (#bats == 1) then
                        bats[1] = createBatsBody( bats[1], event, "static", {} )
                else
                        bats[1] = createBatsBody( bats[1], event, "dynamic", {} )
                end
                
                bats[1].timer = delayRemoveLine
                timer.performWithDelay( 5000, bats[1] )
        end
end
 
main()