I’m lost, I don’t suppose someone could help me understand how to adjust this code? I’ve taken the Time Animation template with the metal bg and bouncing ball and I’m trying to adjust it so that the ball enters the stage already moving, instead of having to be dragged. But instead of bouncing it is sticking to the wall 
Thanks if you can help.
Kevin
[lua]local screenW, screenH = display.contentWidth, display.contentHeight
local friction = 1
local gravity = 0
local speedX, speedY, prevX, prevY, lastTime, prevTime = 0, 0, 0, 0, 0, 0
local background = display.newImage( “metal_bg.jpg”, true )
background.x = screenW / 2
background.y = screenH / 2
local ball = display.newCircle( 0, 0, 40)
ball:setFillColor(255, 255, 255, 166)
ball.x = screenW * 0.5
ball.y = ball.height
– this is the new code to get the ball moving when it enters frame –
local moveDirectionX= math.random(-2,2)
local moveDirectionY= math.random(-2,2)
function ball:enterFrame(event)
ball.x= ball.x+moveDirectionX
ball.y = ball.y+moveDirectionY
end
Runtime:addEventListener(“enterFrame”,ball)
– this is where the new code ends, everything else here is from the template –
function onMoveCircle(event)
local timePassed = event.time - lastTime
lastTime = lastTime + timePassed
speedY = speedY + gravity
ball.x = ball.x + speedX*timePassed
ball.y = ball.y + speedY*timePassed
if ball.x >= screenW - ball.width*.5 then
ball.x = screenW - ball.width*.5
speedX = speedX*friction
speedX = speedX*-1 --change direction
elseif ball.x <= ball.width*.5 then
ball.x = ball.width*.5
speedX = speedX*friction
speedX = speedX*-1 --change direction
elseif ball.y >= screenH - ball.height*.5 then
ball.y = screenH - ball.height*.5
speedY = speedY*friction
speedX = speedX*friction
speedY = speedY*-1 --change direction
elseif ball.y <= ball.height*.5 then
ball.y = ball.height*.5
speedY = speedY*friction
speedY = speedY*-1 --change direction
end
end
– A general function for dragging objects
local function startDrag( event )
local t = event.target
local phase = event.phase
if “began” == phase then
display.getCurrentStage():setFocus( t )
t.isFocus = true
– Store initial position
t.x0 = event.x - t.x
t.y0 = event.y - t.y
– Stop current motion, if any
Runtime:removeEventListener(“enterFrame”, onMoveCircle)
– Start tracking velocity
Runtime:addEventListener(“enterFrame”, trackVelocity)
elseif t.isFocus then
if “moved” == phase then
t.x = event.x - t.x0
t.y = event.y - t.y0
elseif “ended” == phase or “cancelled” == phase then
lastTime = event.time
Runtime:removeEventListener(“enterFrame”, trackVelocity)
Runtime:addEventListener(“enterFrame”, onMoveCircle)
display.getCurrentStage():setFocus( nil )
t.isFocus = false
end
end
– Stop further propagation of touch event!
return true
end
function trackVelocity(event)
local timePassed = event.time - prevTime
prevTime = prevTime + timePassed
speedX = (ball.x - prevX)/timePassed
speedY = (ball.y - prevY)/timePassed
prevX = ball.x
prevY = ball.y
end
ball:addEventListener(“touch”, startDrag)
Runtime:addEventListener(“enterFrame”, onMoveCircle)
[lua] [import]uid: 96383 topic_id: 16481 reply_id: 316481[/import]