Touch help, making a cursor follow the finger

Finchy92

Hi, I'm new to lua and all this coding business and starting to learn via Codea.
Just a quick question, I am trying to create a cursor that follows your finger when you touch the screen, and when you remove your finger the cursor disappears.

So far this is my code, it is simple but Im not sure how to get the image to go after the touch ha been removed.

function touch()
    
    if touch.state == ENDED then touching = false
    else touching = true
    end
end

function setup()
    
    
end

function draw()
    background(0, 0, 0, 255)
    fill(127, 122, 132, 255)
    ellipse( CurrentTouch.x, CurrentTouch.y, 15)
    if touching == true then draw = ellipse( CurrentTouch.x, CurrentTouch.y, 15)
    end
    
end

Thanks for your help

Deamos

how about something like this...

function setup()
   cursorPosition = nil
   cursorActive = false
end

function touched(touch)
   if touch.state == BEGAN or touch.state == MOVING then
         cursorPosition = vec2(x,y)
         cursorActive = true
   elseif touch.state == ENDED then
         cursorPosition = nil
         cursorActive = false
   end
end

function draw()
   background(0,0,0,255)
   fill(127.122,132,255)
   if cursorActive == true then
         ellipse(cursorPosition.x,cursorPosition.y,15)
   end
end

Try that out and see if it works.

Anonycode

But why cant you just use

-- Use this function to perform your initial setup
function setup()
    displayMode(FULLSCREEN)

    
    cursorsize = 15
 
    
    

x = 200
y = 570
end
 
-- This function gets called once every frame
function draw()
    
    background(0, 0, 0, 255)
    fill(127, 122, 132, 255)

    -- This sets the line thickness
    --strokeWidth(thickness)

    ellipse(x,y, cursorsize)
    
if CurrentTouch.state == BEGAN or CurrentTouch.state == MOVING then
 x = CurrentTouch.x
y = CurrentTouch.y
cursorsize =15
else

cursorsize =0
end
    
    
 


    -- Do your drawing here
     
end

Deamos

You could do that too. I just like handling touches in a touch function. Makes it easier to handle as a project gets more complex.

Finchy92

Thanks guys for your help, sorry for a late response.

CodeaNoob

@skullagepk,
the only problem with yours is that he wants an ellipse, not a sprite.

stevon8ter

Also this topic is over a year old...

CodeaNoob

@skullagepk, Sorry I didn't notice that, and Please don't ad things to ild discussion unless you MUST ask something, and in which case you should PM the person, not bump the thread.

[Deleted User]

Can I just ask why hasn't this been closed?

stevon8ter

@TheRogueBatcher, forum mods don't have time to close every single topic, and it isn't nescessary, please don't bring this topic back up the main page by posting comments like this please