Scrolling background (not smooth)

Solar2D General Questions/Discussion
#1

Hi, 

I am trying to make an endless scrolling background but it seems to be jerky/not smooth. Here is some example code, I have also tried transition and translate but both have same issue. Anyone know why its not smooth?

local speed = 3

backbackground = display.newImageRect(“images/background.png”, 480, 570)

backbackground.x = display.contentWidth / 2

backbackground.y = display.contentHeight / 2

local function updateBackgrounds()

        backgroundnear.x = backgroundnear.x - (speed + 1)

end

backgroundnear = display.newImageRect(“images/newbg.png”, 1002, 280)

backgroundnear.x = display.contentWidth 

backgroundnear.y = display.contentHeight 

timer.performWithDelay(1, updateBackgrounds, -1)

Thanks

#2

Timer is just too slow to use as a scrolling iterator; anything below 50ms is really all the same.

You should really just be doing your scrolling within an enterFrame listener instead; that way you can guarantee something happens every frame.

#3

try this
http://j-strahan.com/main/?p=127
it was made for graphics 1.0 but could be made to work with 2.0 with a few changes. I’m in the process of completely rewriting for 2.0 should be ready in a day or two with additional features

#4

or if you search the forum the code has been posted several times on how to do this

#5

Thanks for the replies. enterframe still seems to be the same result tho?

jstrahan your page is down

#6

This video demonstrates what I mean https://dl.dropboxusercontent.com/u/43113129/Screen%20Capture%20Tool_2014-02-25%2021.39.47.mov

#7

sorry I was having trouble with the redirect and I guess the host corrected it wrong. give me your email and I’ll send to you

#8

My email address is lukestirk@googlemail.com

Thanks

#9

I’ll send later today when I get home. 2.0 taking a bit longer then I thought but shouldn’t be more then a few days and it will be complete

#10

I’ve tried a few examples and all of them are jittery on Build 2013.2100

#11

Have you tried them on a device? 

#12

luke,

try using the enterframe event, I wouldn’t use timers… if you need some help with the code let me know… 

Vik

#13

Timer is just too slow to use as a scrolling iterator; anything below 50ms is really all the same.

You should really just be doing your scrolling within an enterFrame listener instead; that way you can guarantee something happens every frame.

#14

try this
http://j-strahan.com/main/?p=127
it was made for graphics 1.0 but could be made to work with 2.0 with a few changes. I’m in the process of completely rewriting for 2.0 should be ready in a day or two with additional features

#15

or if you search the forum the code has been posted several times on how to do this

#16

Thanks for the replies. enterframe still seems to be the same result tho?

jstrahan your page is down

#17

This video demonstrates what I mean https://dl.dropboxusercontent.com/u/43113129/Screen%20Capture%20Tool_2014-02-25%2021.39.47.mov

#18

sorry I was having trouble with the redirect and I guess the host corrected it wrong. give me your email and I’ll send to you

#19

My email address is lukestirk@googlemail.com

Thanks

#20

I’ll send later today when I get home. 2.0 taking a bit longer then I thought but shouldn’t be more then a few days and it will be complete