view zoom problem - GameCreators Forum

Author

Message

basjak

14

Years of Service

User Offline

Joined: 16th Apr 2010

Location: feel like signing up for mars

Posted: 3rd Mar 2013 11:14

Link

HI guys.

am trying to make what is similar to a book reader effect when users scroll up,down,right and left using touch screen or mouse pointer.

every thing is fine on default view mode but when I change the view zoom (at line 17), the scrolling leaves the sprite's borders.

sprite dimension: 1024x768

+ Code Snippet

SetDisplayAspect(320/320.0)
setvirtualresolution(320,480)
setbordercolor(125,0,0)
setclearcolor(0,125,0)

setsyncrate(60,1)

img = loadimage("field.PNG")
createsprite(img,img)

zoom# = 1.0

setviewzoom(zoom#)

x#=0
y#=0

do
    touchno = getrawfirsttouchevent(1)

    print(getviewoffsetx())
    print(getviewoffsety())

    if getrawtouchtype(touchno)=3
        movedx# = getrawtouchcurrentx(touchno) - getrawtouchlastx(touchno)
        movedy# = getrawtouchcurrenty(touchno) - getrawtouchlasty(touchno)

        x# = getviewoffsetx()-movedx#
        y# = getviewoffsety()-movedy#

        if x#<0 then x#=0
        if y#<0 then y#=0
        if x#>1024*zoom#-320 then x#=1024*zoom#-320
        if y#>768*zoom#-480 then y#=768*zoom#-480
    endif

    setviewoffset(x#,y#)

    sync()
loop

as well if someone knows how to add some sort of force effect when scrolling.

Please download file for full sample

.

Attachments

Login to view attachments

Back to top

Profile PM Email Website

Markus

Valued Member

20

Years of Service

User Offline

Joined: 10th Apr 2004

Location: Germany

Posted: 3rd Mar 2013 12:43 Edited at: 3rd Mar 2013 12:45

Link

why not use sprite physics and move the sprite with impulse instead of setviewoffset ?
and SetViewZoomMode(1) //Center
is useful.

Back to top

Profile PM Email

basjak

14

Years of Service

User Offline

Joined: 16th Apr 2010

Location: feel like signing up for mars

Posted: 3rd Mar 2013 13:28 Edited at: 3rd Mar 2013 16:47

Link

thanks markus

I know about the sprite physics. you even can double the sprite size while keeping zoom = 1 and get the wanted result.

however, using SetViewZoom(zoom) will solved problems in general rather than specific.

Back to top

Profile PM Email Website

Markus

Valued Member

20

Years of Service

User Offline

Joined: 10th Apr 2004

Location: Germany

Posted: 5th Mar 2013 08:33

Link

for the scrolling with sprite borders i need more time.

re:some sort of force effect
you mean somthing like this?

+ Code Snippet

setbordercolor(125,0,0)
setclearcolor(0,125,0)

setsyncrate(30,0)

SetViewZoomMode(1) //Center!
zoom# = 1.0
setviewzoom(zoom#)

img = loadimage("field.PNG")
spr=createsprite(img)
setspritesize(spr,100,-1)
setspritepositionbyoffset(spr,50,50)

x#=0
y#=0
xs#=0
ys#=0

do
    t = GetRawFirstTouchEvent(1)

    if t=0  //  getrawtouchtype(touchno)=3
    else

        print("touch")

        x1# = getrawtouchstartx(t)
        y1# = getrawtouchstarty(t)

        x2# = getrawtouchcurrentx(t)
        y2# = getrawtouchcurrenty(t)

        drawline(x1#,y1#,x2#,y2#,255,255,0)

        dx# = (x2#-x1#)
        dy# = (y2#-y1#)
        xs#=dx#/ 50.0
        ys#=dy#/ 50.0

    endif

    x#=x#+xs#
    y#=y#+ys#

    xs#=xs# * 0.95
    ys#=ys# * 0.95

    sw#=getspritewidth(spr)/2.0
    sh#=getspriteheight(spr)/2.0

    //...

    setviewoffset(x#,y#)

    sync()
loop
end

Back to top

Profile PM Email

Sorry your browser is not supported!

AppGameKit Classic Chat / view zoom problem

Attachments