require ("physics")
 
physics.start()
physics.setDrawMode( "hybrid" ) -- Uncomment in order to show in hybrid mode    
physics.setGravity( 0, 10)
 
physics.start()
 
function createGlobalAnchor()
        anchor = display.newCircle( -100, -100, 10 )
        anchor.alpha = 0
        physics.addBody( anchor, "static" )
end
 
function main()
        display.setStatusBar( display.HiddenStatusBar )
        createGlobalAnchor()
        Runtime:addEventListener( "touch", createNewBat )
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
 
function createNewBat( event )
        local batgrp = display.newGroup()
        batgrp.start = event
        batgrp.ending = event
        
        function batgrp:newBat()
                local rect = display.newRoundedRect( batgrp, batgrp.start.x-25, batgrp.start.y-25, 50, 50, 25 )
                rect.strokeWidth = 12
                --rect:setStrokeColor( 0, 255, 0 )
                --rect:setFillColor( 0, 0, 0 )
                rect.x, rect.y = batgrp.start.x+(batgrp.ending.x-batgrp.start.x)/2, batgrp.start.y+(batgrp.ending.y-batgrp.start.y)/2
                local angle = angleBetween( batgrp.start, batgrp.ending )
                rect.rotation = angle
                physics.addBody( rect, "static" )
        end
        
        function batgrp:touch( event )
                print(event.x,event.y)
                if (event.phase == "moved") then
                        batgrp[1]:removeSelf()
                        batgrp.ending = event
                        batgrp:newBat()
                else
                        display.getCurrentStage():setFocus( nil )
                end
                return true
        end
        print(event.x+event.y)
        batgrp:newBat( event, event )
        display.getCurrentStage():setFocus( batgrp )
        batgrp:addEventListener( "touch", batgrp )
        
        return true
end
 
main()