Can't see PRINT/TEXT with sprites

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Caeknommer

12

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Joined: 20th Mar 2013

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Posted: 20th Mar 2013 12:20

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I understand that once you start loading sprites DBpro basically gets into "3d mode" - my question is when I run a very simple program with a sprite, why can I no longer see PRINT or TEXT? Simple example:

+ Code Snippet

SET DISPLAY MODE 1280,1024,32
LOAD IMAGE "test.jpg",1
SPRITE 1,50,50,1
TEXT 5,5, "hello"
WAIT KEY
END

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Chris Tate

DBPro Master

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Joined: 29th Aug 2008

Location: London, England

Posted: 20th Mar 2013 21:05

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You need to keep drawing the text on every frame, currently you are drawing the text on one frame, then the engine draws new frames while the sprite (technically part of the 3D GPU API) is being redrawn.

Use something like this,

+ Code Snippet

SET DISPLAY MODE 1280,1024,32
LOAD IMAGE "test.jpg",1
SPRITE 1,50,50,1
REPEAT : TEXT 5,5, "hello" : UNTIL SCANCODE()
END

Assuming sync has not been turned on. If you used Sync On, put the sync command in there before the until keyword.

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Sergey K

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Joined: 4th Jan 2004

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Posted: 20th Mar 2013 22:11

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how about hiding sprite when u creatign it, and using PASTE SPRITe command instead?

+ Code Snippet

load image "my image.jpg",1
sprite 1,0,0,1
set sprite 1,0,1
hide sprite 1
sync on
sync rate 60
do
 paste sprite 1,0,0
 text 0,0,"Hello World"!
 sync
loop

Advanced Updater for your games!

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Caeknommer

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Joined: 20th Mar 2013

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Posted: 3rd Apr 2013 14:35

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Thanks all, that helps explain it. Another quick question though, if I slightly modify Sergey K's code:

+ Code Snippet

load image "test.jpg",1
sprite 1,0,0,1
set sprite 1,1,1
hide sprite 1
sync on
sync rate 60
for x=1 to 200 step 5
 paste sprite 1,x,100
 text 0,0,"Hello World"
 sync
next x
wait key

... two things happen: the background remains black and the sprite DOESN'T restore the background. Without the SET SPRITE command the background goes the usual blue and background is restored. It doesn't seem to matter whether the backsave flag is set to 1 or 0, the result is the same.

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Ramus73

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Joined: 24th May 2009

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Posted: 5th Apr 2013 00:29

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Thats because you are pasting it to the screen. When using paste sprite you need to redraw the background before moving and pasting again. If you put cls 0 before the paste sprite command it will do what its supposed to (the cls is where you would redraw background elements). If you are just pasting a sprite to the screen I usually keep it off the actual screen (sprite 1,-5000,-5000,1). You don't need the hide sprite command then. Note: if you intend to use collision detection you need to have the sprite on screen.

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DarkBASIC Professional Discussion / Can't see PRINT/TEXT with sprites