A sprite Disappearing

Im making a whack a bug game and i just need to make my bugs disappear after x amount of seconds. Does anyone have some code to make them disappear after x amount of seconds?

-Thanks

You can define a lifeTime variable for how long you want the bug to be alive and then test it against elapsedtime.

function makeBug()
   bug = {}
   bug.lifeTime = 10
   bug.birthTime = elapsedTime
end

function draw()
   if elapsedTime-bug.birthTime > bug.lifeTime then
      -- remove the bug
   end
end

Or, combine those two variables into one:

lifetime = ElapsedTime +10
...
if ElapsedTime>lifetime then

@Conner Here’s an example.

EDIT: Added circles.

displayMode(FULLSCREEN)
supportedOrientations(LANDSCAPE_ANY)

function setup()
    count=100
    delay=.8    -- delay .8 seconds. Change value to desired delay time.
end

function draw()
    background(40, 40, 50)
    fill(208, 208, 208, 101)
    count=count+1
    if count>delay*60 then
        count=0
        while hold==rp do
            rp=math.random(1,25)
        end
        hold=rp
    end
    pos=0
    for x=1,5 do
        for y=1,5 do
            pos=pos+1
            ellipse(x*180,y*140,130)
            if pos==rp then
                sprite("Planet Cute:Enemy Bug",x*180,y*140+25)
            end
        end
    end
end

Thank you for all your advice

@Kirl, what do you mean by --remove bug. I need help removing the bugs

you don’t remove them - you just don’t draw them

are there any ways make a sprite’s apearing effects? like spinning, moving, translating

@firewolf You can do whatever you want with the sprite.

@lgnatz, ah. See im new to codea and lua and i thought you actually removed it. Thanks for telling me. How would you draw over it?

Codea is redrawing at up to 60 frames per second. No need to draw over it - just set the code to not draw it when necessary.

Thank you so much @iam3o5am

@Conner - Codea works completely differently.

I’ve written a lot of posts and ebooks that may help you, here.

thanks Dave?could u give a effects example?

Spin by rotating the sprite

Appear and disappear by altering size or by covering the sprite with a partly transparent rectangle

Tweens can add special effects

If you’re not sure how to do any of this, you need to learn the basics of Codea graphics. See my link above, or the wiki link at the top of this page, for help with this.

@firewolf Here’s my above program where I spin the sprite and increase its size.

displayMode(FULLSCREEN)
supportedOrientations(LANDSCAPE_ANY)

function setup()
    count=100
    delay=.8    -- delay .8 seconds. Change value to desired delay time.
    rot=0
end

function draw()
    background(40, 40, 50)
    fill(208, 208, 208, 101)
    count=count+1
    if count>delay*60 then
        count=0
        while hold==rp do
            rp=math.random(1,25)
        end
        hold=rp
        rot=0
    end
    pos=0
    for x=1,5 do
        for y=1,5 do
            pos=pos+1
            ellipse(x*180,y*140,130)
            if pos==rp then
                pushMatrix()
                translate(x*180+20,y*140-10)
                rot=rot+5
                rotate(rot)
                sprite("Planet Cute:Enemy Bug",0,0,rot/2)
                popMatrix()
            end
        end
    end
end

thanks Dave?its better to give more effects

@Ignatz You can also use tint() to fade in or out an image, instead of drawing a transparent rectangle over it.