2d problems!(sprite collision, text refresh)

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Satchmo

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Joined: 29th May 2005

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Posted: 28th Mar 2008 22:41

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Hello, I don't have much experience with 2d in dbc, so I suspected a few problems like this and, I got them, wohoo!

Anyways, the problems I am having are the text is not refreshing(overlapping from last loop and my sprite collision isn't registering.

+ Code Snippet

  load image "Rblock.bmp",1
load image "Gblock.bmp",2
load image "Bblock.bmp",3
load image "Yblock.bmp",4
load image "Pblock.bmp",5
load image "MouseSP.bmp",6
SPRITE 3,MOUSEX(),MOUSEY(),6
HIDE SPRITE 3
`-----------------
`Make Sprites
`-----------------

sprite 1,150,100,1
sprite 2,250,100,2

`-----------------
`Load Music
`-----------------

Load sound "Gemini.wav",1
set sound volume 1,30
loop sound 1

`______________________________________________________________
`                             MAIN LOOP
`______________________________________________________________

DO
paste sprite 3,mousex(),mousey()

paste sprite 1,150,100

set cursor 0,0
if Sprite hit(3,1)=1 then end
print screen fps()
print sprite x(3)
print sprite y(3)
sync
LOOP

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Ed222

18

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Joined: 3rd Nov 2007

Location: Calgary

Posted: 28th Mar 2008 23:59

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did you try to put a cls after the sync in the loop?

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BN2 Productions

22

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Joined: 22nd Jan 2004

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Posted: 29th Mar 2008 00:10

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Here are what I saw:

1. Indent you loop so instead of this

+ Code Snippet

DO
paste sprite 3,mousex(),mousey()

paste sprite 1,150,100

set cursor 0,0
if Sprite hit(3,1)=1 then end
print screen fps()
print sprite x(3)
print sprite y(3)
sync
LOOP

it looks like this

+ Code Snippet

DO
     paste sprite 3,mousex(),mousey()

     paste sprite 1,150,100

     set cursor 0,0
     if Sprite hit(3,1)=1 then end
     print screen fps()
     print sprite x(3)
     print sprite y(3)
     sync
LOOP

this just makes it easier to read

2. The paste sprite actually just copies the sprite image to the screen, it doesn't move the sprite (if this is confusing, move the sprites location around and you'll see). Just use the sprite command.

3. Personally I have never had good luck with the hit commands (object hit or sprite hit). Try using the collision commands. This will also fix some problems where the object goes from not touching it to overlapping it due to the speed it is traveling

4. Use text commands, rather than print commands. Then make sure that you use cls in your loop AFTER sync (if you put it right before, you won't see anything)

Hope these tips help!

Ever notice how in Microsoft word, the word "microsoft" is auto corrected to be "Microsoft" but "macintosh" just gets the dumb red underline?

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Satchmo

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Joined: 29th May 2005

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Posted: 29th Mar 2008 00:17

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NVM, thanks for your help, I actually tried using the sprite command before you posted and it worked. I will switch to the collision command, thanks for the advice.

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TDK

Retired Moderator

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Joined: 19th Nov 2002

Location: UK

Posted: 29th Mar 2008 02:39

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If your sprites are solid primary colours you should read this if you are having collision problems:

http://forum.thegamecreators.com/?m=forum_view&t=126714&b=10

TDK_Man

* TDK's Game Programming Forums - Open To All - DB & Team Request Boards *

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DarkBASIC Discussion / 2d problems!(sprite collision, text refresh)