Scrolling Backdrop command replacement

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fpprog12

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Posted: 30th Nov 2010 21:25

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I am new to DBPro and found a demo that uses scrolling backdrop. When I compiled it, I got that the command is obsolete. The help mentions using sky and boxes. I was wondering if there is a replacement command or if someone can provide some code snippets to replace the scrolling backdrop command. Thanks for your help.

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baxslash

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Posted: 30th Nov 2010 23:49

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Maybe post the code and we'll get an idea of what it should be doing exactly?

Sounds more like a skybox than a scrolling background exactly...

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Virtual Nomad

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Posted: 30th Nov 2010 23:49 Edited at: 1st Dec 2010 00:00

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update your dbpro to the latest version as the texture backdrop command has recently returned. link here

edit here is weird. see below for the real edit

Virtual Nomad @ California, USA . DBPro V7.5
AMD Phenom™ X4 9750 Quad-Core @ 2.4 GHz . 8 GB PC2-6400 RAM
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Virtual Nomad

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Posted: 30th Nov 2010 23:58

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update your dbpro to the latest version as the texture backdrop command has recently returned. link here

add: from some intial testing i did when the command returned, it appears texture backdrop is just a fancy sprite command since the performance hits are near-identical. basically i think it automatically scales a sprite to the window/screen size and maybe uses the SET SPRITE TEXTURE COORD to scroll it via scroll backdrop (tho i haven't played with either since).

good luck!

Virtual Nomad @ California, USA . DBPro V7.5
AMD Phenom™ X4 9750 Quad-Core @ 2.4 GHz . 8 GB PC2-6400 RAM
ATI Radeon HD 3650 @ 512 MB . Vista Home Premium 64 Bit

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Rich Dersheimer

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Posted: 1st Dec 2010 01:13 Edited at: 1st Dec 2010 01:15

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Here's some code that uses a plane to replace the backdrop, then scrolls the texture of the plane...

+ Code Snippet


set display mode 640,480,32
ink rgb(255,0,0),0

` this part draws a background
for x = 0 to 630 step 10
    box x,480-30*rnd(10),x+10,480
next x
get image 1,0,0,640,480,1
cls

` this part sets up a plane as the backdrop
autocam off
make object plane 1,640,480
position object 1,0,0,400
texture object 1,1
set ambient light 200

` this part scrolls the backdrop
do
    scroll object texture 1,-.001,0
    wait 1
loop

@Virtual Nomad - I have that update but I still get the "obsolete" error. Seems funny that they should put TEXTURE BACKDROP back in, but then take out SCROLL BACKDROP.

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Virtual Nomad

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Posted: 1st Dec 2010 01:58 Edited at: 1st Dec 2010 02:01

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@rich, crap, ur right. scroll is gone...

@op, i played with set sprite texture coord and it wasn't what i expected (but was fun). ie, i don't see how it could scroll the sprite's image (maybe someone else can?).

meanwhile:

+ Code Snippet

set display mode 640,480,32,1
ink rgb(255,0,0),0

` this part draws a background
for x = 0 to 630 step 10
    box x,480-30*rnd(10),x+10,480
next x
get image 1,0,0,640,480,1

ink rgb(255,255,255),rgb(0,0,0)

do
   offset = offset + (leftkey()-rightkey())

   if offset = 0
      paste image 1, 0,0
   else
      if offset > 639 then offset = 0
      if offset < 0 then offset = 639
      paste image 1, offset-640, 0
      paste image 1, offset,0
   endif

   text 0,0,str$(offset)
loop

Virtual Nomad @ California, USA . DBPro V7.5
AMD Phenom™ X4 9750 Quad-Core @ 2.4 GHz . 8 GB PC2-6400 RAM
ATI Radeon HD 3650 @ 512 MB . Vista Home Premium 64 Bit

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