Director Class swipe for a game help

Hi, I'm using the director class for my game, and I need some assistance in using the Director Class for using the swiping up and down, and left and right function together on the same object for changing screens. It seems that DC can't detect the difference between up and down, and left and right when they are on the same object. Is there a any solution to this? Help is appreciated. Thanks.

What you could do is first use the code located here:
http://developer.anscamobile.com/code/object-drag-direction

Then have a function that says

   local function changeScene ()
      if e.phase == ended then
         if  string_dir="Up" then
           director:changeScene("desiredScene", "desiredTransition")
         elseif  string_dir="Down" then
           director:changeScene("desiredScene", "desiredTransition")
         elseif  string_dir="Left" then   
           director:changeScene("desiredScene", "desiredTransition")
        elseif  string_dir="Right" then
            director:changeScene("desiredScene", "desiredTransition")
        end
     end
 
I don't know if it will work, but its looks like it should

Thanks Joe! This is exactly what I was looking for. The only problem is that function that you provided; it causes an error in the terminal. Nevertheless, I can just put the director:changeScene function straight into the object-drag-direction code. Thanks again!

No prob! What does the terminal say?

Well, it would appear that I spoke too soon. When I put the changeScene function in the other code like I said before, it causes Corona to crash :p.

When I put in the code that you suggested, I get the following error:

Runtime error
        /Users/myUser/Documents/test/director.lua:934: ERROR: table expected. If this is a function call, you might have used '.' instead of ':'
stack traceback:
        [C]: ?
        [C]: in function 'insert'
        /Users/myUser/Documents/test/director.lua:934: in function '_listener'
        ?: in function <?:501>
        ?: in function <?:215>

Okay... let me create a project real quick and try this out.

Are you using the new 15 line director or the old one?

I'm using the old one, I've heard of the 15 line one, but haven't tried it out yet.

If you download the 1.4 version here:
http://developer.anscamobile.com/code/director-class-10

He has a way to change scenes by swiping horizontally. Maybe it could be implemented to vertical swiping to...

Okay, grab your popcorn. I have kinda created my own way of detecting which way you swipe and then changing the scene. Here is main.lua:

director = require('director')
local function main()
    director:changeScene('menu')
end
main()

Ok, This is great, but it doesn't quite have all of the functionality that I'm looking for. It's rather important that I can be able to use it vertically too. That's why I got excited over seeing the Object Drag Direction code. I'm going to work with the code that you demonstrated, and try to modify the Object Drag Direction code to see if I can get the effect that I'm looking for. Thank you very much for all of your help so far :)

Okay, I think I got what you want. I haven't made all the scenes. Just the "left" one:

--to store previous position of x and y 
local _M = {}
local prevx = 0
local prevy = 0
 
local direction = "right"
 
 
  function _M.new( )
 local localGroup = display.newGroup()
 
 
 
local rectangle = display.newRect(0,100,display.contentWidth,400)
rectangle:setFillColor(255,0,0)
localGroup:insert(rectangle)
 
 local placeMarker = display.newCircle(0,0,15)
 placeMarker:setFillColor(0,0,255)
 localGroup:insert(placeMarker)
 
local directionTXT = display.newText("direction: ",50,50,nil,25) 
 localGroup:insert(directionTXT)
--local director = require ("director")
 
 
local function onTouch( event )
        local t = event.target
        local phase = event.phase
        if "began" == phase then
                -- Make target the top-most object
                local parent = t.parent
                parent:insert( t )
                display.getCurrentStage():setFocus( t )         
                t.isFocus = true
 
                -- Store initial position
                t.x0 = event.x - t.x
                t.y0 = event.y - t.y
                prevx = event.x
                prevy = event.y
        elseif t.isFocus then
                if "moved" == phase then
                          -- t.x = event.x - t.x0
--                           t.y = event.y - t.y0      
 
                                local dx = prevx - event.x
                                local dy = prevy - event.y
                                local distance = dx * dx + dy * dy
                                if distance>400 then
                                        local angle = math.atan2(dy,dx) * 57.2957795
                                        local string_dir
                                        if angle>=22*-1 and angle<23 then
                                                string_dir="Left"
                                                direction = "left"
                                                                                   elseif angle>=23 and angle<68 then
                                                string_dir="Up Left"
                                                  direction ="Up Left"
                                        elseif angle>=68 and angle<113 then
                                                string_dir="Up"
                                                  direction = "Up"
                                        elseif angle>=113 and angle<158 then
                                                string_dir="Up Right"
                                                  direction = "Up Right"
                                        elseif angle>=135 or angle<157*-1 then
                                                string_dir="Right"
                                                  direction = "Right"
                                        elseif angle>=157*-1 and angle<112*-1 then
                                                string_dir="Down Right"
                                                  direction ="Down Right"
                                        elseif angle>=112*-1 and angle<67*-1 then
                                                string_dir="Down"
                                                  direction = "Down"
                                        elseif angle>=67*-1 and angle<22*-1 then
                                                string_dir="Down Left"
                                                  direction = "Down Left"
                                        end
                                        prevx=event.x
                                        prevy=event.y
                                        directionTXT.text = "Direction : "..string_dir
                                 end
                                -- if phase == "ended" then
                                                                
                                                                --      director:changeScene("Left")
                                                        --      end
                                                                end
                                                                        
                         end
                                if string_dir == "Left" then
                                                                        print "verified"
                end
        return true
end
 
rectangle:addEventListener("touch", onTouch)
 
local function switch (e)
        if e.phase == "ended" then
                if direction == "left" then
                print (direction)
                director:changeScene('left')                  
                elseif direction == "Up Left" then
                print (direction)   
                director:changeScene("Up Left")      
                elseif direction == "Up" then
                print (direction)     
                director:changeScene("Up" )                         
                elseif direction == "Up Right" then
                print (direction)   
                director:changeScene("Up Right")                           
                elseif direction == "Right" then
                print (direction)    
                director:changeScene("Right")                         
                elseif direction == "Down Right" then
                print (direction)  
                director:changeScene("Down Right" )                             
                elseif direction == "Down" then
                print (direction)   
                director:changeScene("Down")                           
                elseif direction == "Down Left" then
                print (direction)   
                director:changeScene( "Down Left")                           
                end
        end
end
rectangle:addEventListener("touch", switch)
 
return localGroup
end
return _M

views:2157 update：2011/11/8 8:33:25


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