Animating an object in a parabolic motion

Staples

Hi,
I'm new to programming on Codea and apps in general. What is the best way to animate an object (such as an ellipse) in an arc like a parabola (in a parabolic motion)? I've searched around on the forums and online and I can't seem to figure it out.
Thanks!

dave1707

@Staples I'm not sure what you're after, but is it something like this.

displayMode(FULLSCREEN)
supportedOrientations(LANDSCAPE_ANY)

function setup()
    b=physics.body(CIRCLE,5)
    b.x=50
    b.y=50
    b.gravityScale=0
    show=true
end

function draw()
    background(40, 40, 50)
    fill(255)
    if show then
        text("tap screen",WIDTH/2,HEIGHT-100)
    end
    ellipse(b.x,b.y,10)
    if b.y<0 then
        restart()
    end
end

function touched(t)
    if t.state==BEGAN then
        b.gravityScale=1
        b.linearVelocity=vec2(300,500)
        show=false
    end
end

Staples

Yeah that's perfect. I tried using a variable "thrust" like in the Lunar Lander tutorial, but it didn't look as professional as this. Thanks!

Staples

@dave1707 How would you get this to animate upon loading? I've tried putting the code from function touched(t) in the draw() function and nothing happened. I've also tried having a separate function called animate() where a timer is set in the draw() function and the animate() function is called every 300 frames, but neither of those seem to work.

dave1707

@Staples This animates upon loading.

displayMode(FULLSCREEN)
supportedOrientations(LANDSCAPE_ANY)

function setup()
    b=physics.body(CIRCLE,5)
    b.x=50
    b.y=50
    b.gravityScale=1
    b.interpolate=true
    b.linearVelocity=vec2(300,500)
    show=false
end

function draw()
    background(40, 40, 50)
    fill(255)
    if show then
        text("tap screen",WIDTH/2,HEIGHT-100)
    else
        ellipse(b.x,b.y,10)
        if b.y<0 then
            b:destroy()
            show=true
        end
    end
end

function touched(t)
    if t.state==BEGAN then
        restart()
    end
end

Staples

@dave1707 Thanks!