Multitouch mess

MMGames

It seems that I cant understand multitouch. Here is my touch function with all the mess that is included:

function Player:touched(touch)
    --Move
    if touch.state==BEGAN then 
        self.touches[touch.id]=touch
    end
    for k,touchs in pairs(self.touches) do
        if touchs.state==MOVING and touchs.x>0 and touchs.x<150 and
           touchs.y>0 and touchs.y<150 then
            self.speed=touchs.y/9
        end
        --Look x and y
      if touchs.state==BEGAN then
            self.dax=touchs.x
            self.lyx=touchs.y
        end
        if touchs.state==MOVING and touchs.x>150 then
            self.da=self.dalx-(touchs.x-self.dax)
            self.angle=self.da/80
            self.tly=self.lylx-(self.lyx-touchs.y)
            self.tly=self.tly/100
            if self.tly>1.5 then self.tly=1.5 end
            if self.tly<-1.5 then self.tly=-1.5 end
    end
        if touchs.state==ENDED then
            self.touch[touchs.id]=nil
            self.speed=0
            self.dax=0
            self.dalx=self.da
            self.lylx=self.tly
            self.lyx=0
end
end
end

Help would be appreciated!

EDIT: Fixed BEGAN and MOVING

Jmv38

it is not clear what you are trying to do. Difficult then to help you?

MMGames

Oh, didnt mean to be unclear. What I want to acheive is to get the multitouch in the code to work, as it didnt when I tried it before posting this question. There is a problem somewhere, but I cant find it...

Jmv38

oh really? You want it to work? Silly me, i thought you wanted it not to work!
From the indication you've given me up to now, my most appropiate proposal would be: 'make it work then, by correcting the bugs'. No, dont thank me, it is natural to help when i can.
Now, if you can be a bit more specific on describing what result you want exactly, maybe i will be able to be more specific too.
;-)

MMGames

Haha, well I might not always be so clear.
However, what I want is the user to have one finger touching/adjusting the speed and another finger to look around. After figuring out the basics of multitouch I executed my code but the game didn't respond. So thats the problem that I am incapable of solving.

dave1707

@MMGames One thing I noticed was these "if" statements. touchs.state can't be BEGAN and MOVING at the same time, so MOVING will never be true.

    if touchs.state==BEGAN then
        if touchs.state==MOVING and touchs.x>0 and touchs.x<150 and

MMGames

Fixed. Thanks @dave1707
But the problem is still there...

MrScience101

Do you have codea community? Have a look at Spritea or Spacewar in there, or if not look here:

http://twolivesleft.com/Codea/Talk/discussion/4487/spritea-a-rapid-scene-generation-tool-from-sprites-located-in-the-dropbox-folder/p1

and here:

http://twolivesleft.com/Codea/Talk/discussion/4585/spacewar-soon-to-be-on-the-app-store/p1

Both use multitouch and support up to 11 touches.

If you wanted to post your whole code for us to look at, we might be able to help out more.

Andrew_Stacey

I suspect that your code is getting called too often. Split it into

function Player:touched(touch)
    --Move
    if touch.state==BEGAN then 
        self.touches[touch.id]=touch
    end
end

function Player:processTouches()
    for k,touchs in pairs(self.touches) do
        if touchs.state==MOVING and touchs.x>0 and touchs.x<150 and
           touchs.y>0 and touchs.y<150 then
            self.speed=touchs.y/9
        end
        --Look x and y
      if touchs.state==BEGAN then
            self.dax=touchs.x
            self.lyx=touchs.y
        end
        if touchs.state==MOVING and touchs.x>150 then
            self.da=self.dalx-(touchs.x-self.dax)
            self.angle=self.da/80
            self.tly=self.lylx-(self.lyx-touchs.y)
            self.tly=self.tly/100
            if self.tly>1.5 then self.tly=1.5 end
            if self.tly<-1.5 then self.tly=-1.5 end
    end
        if touchs.state==ENDED then
            self.touch[touchs.id]=nil
            self.speed=0
            self.dax=0
            self.dalx=self.da
            self.lylx=self.tly
            self.lyx=0
end
end
end

Then call processTouches at most once each cycle.

dave1707

@MMGames From what I got out of your questions, you want 2 squares that will control 2 different things. Here is a small example with 2 squares. Since I don't know exactly what you want them to do, I just displayed the left and right x,y values as you move your fingers around the squares. You can take the touched function and add whatever code you want each square to do.

displayMode(FULLSCREEN)

function setup()
    s1=vec2(0,0)    -- x,y left square
    s2=vec2(0,0)    -- x,y right square
end

function draw()
    background(40, 40, 50)
    fill(255)
    rect(100,100,150,150)    -- display left square
    rect(WIDTH-250,100,150,150)    -- display right square
    text(s1.x.."  "..s1.y,200,HEIGHT/2)    -- show left x,y values
    text(s2.x.."  "..s2.y,WIDTH-200,HEIGHT/2)    -- show right x,y values
end

function touched(t)
    if t.state==BEGAN or t.state==MOVING then
        -- check left square
        if t.x>100 and t.x<250 and t.y>100 and t.y<250 then
            -- do whatever when the left square is touched
            s1.x=t.x    -- left square x,y positions
            s1.y=t.y
        end
        -- chack right square
        if t.x>WIDTH-250 and t.x<WIDTH-100 and t.y>100 and t.y<250 then
            -- do whatever when the right square is touched
            s2.x=t.x    -- right square x,y positions
            s2.y=t.y
        end
    end
end

    

bee

That's why I proposed gesture API since the beginning of Codea (was Codify). There are times when you just don't want to get messy with touch detection.

SkyTheCoder

Simple. You just need to update the variable in the tabe. It's assigning a clone, not a pointer. Remove the first if statement to check if the touch's state is BEGAN. This should work.

function Player:touched(touch)
    --Move
    self.touches[touch.id]=touch
    for k,touchs in pairs(self.touches) do
        if touchs.state==MOVING and touchs.x>0 and touchs.x<150 and
           touchs.y>0 and touchs.y<150 then
            self.speed=touchs.y/9
        end
        --Look x and y
      if touchs.state==BEGAN then
            self.dax=touchs.x
            self.lyx=touchs.y
        end
        if touchs.state==MOVING and touchs.x>150 then
            self.da=self.dalx-(touchs.x-self.dax)
            self.angle=self.da/80
            self.tly=self.lylx-(self.lyx-touchs.y)
            self.tly=self.tly/100
            if self.tly>1.5 then self.tly=1.5 end
            if self.tly<-1.5 then self.tly=-1.5 end
    end
        if touchs.state==ENDED then
            self.touch[touchs.id]=nil
            self.speed=0
            self.dax=0
            self.dalx=self.da
            self.lylx=self.tly
            self.lyx=0
end
end
end

MMGames

@SkyTheCoder @dave1707 @Andrew_Stacey Thank you! Now it works as it schould!