How to make sprite stay behind terrain? How to keep terrain in the foreground, and sprite in the background?

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Men_of_Fun

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Joined: 13th Dec 2015

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Posted: 27th Dec 2015 17:29

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Want to put large sprite behind terrain and use it as a background for the sky, but it stays in front of the terrain, and stays there even when I'm moving around with the camera, I can see the bottom part of the terrain moving around, but the top part of the terrain is always covered by the large sprite.

So, question is, how can I make the sprite stay in the background? I tried 'draw to front' for the terrain, and 'paste sprite' to the background, but that didn't work.

+ Code Snippet

Rem Project: Marks Terrain demo
Rem Created: Sunday, December 27, 2015

Rem ***** Main Source File *****
SetUpScreen()
create bitmap 1,1400,1050


load bitmap "bushes.jpg",1

get image 2, 0,0,560,604

load bitmap "Sky background.bmp",1
get image 3, 0,0,898,703

set current bitmap 0

sprite 1,0,0,3


REM *** Create terrain ***
`
MAKE TERRAIN 1,"contour04.png"

texture terrain 1,2

DO
CONTROL CAMERA USING ARROWKEYS 0,5,1

LOOP
REM *** End program ***
END

FUNCTION SetUpScreen()
REM *** Set display mode required ***
SET DISPLAY MODE 1280,1024,32
REM *** position camera ***
AUTOCAM OFF
POSITION CAMERA 0,100,100,-100
REM *** Change to point light ***
SET POINT LIGHT 0,0,100,500
SET AMBIENT LIGHT 50
ENDFUNCTION

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David Gervais

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Joined: 28th Sep 2005

Location: Montreal, Canada

Posted: 27th Dec 2015 19:49 Edited at: 27th Dec 2015 19:50

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If memory serves me (haven't used DBPro in like 5+ years) there should be a command like "SET SPRITE PRIORITY SpriteNumber, Priority" where the the higher priority is drawn last.

(so keep the background sprite at the default value of '0' (zero) and set all other sprites to 1 or higher.)

If someone can confirm, please do.

Cheers!

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WickedX

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Location: A Mile High

Posted: 27th Dec 2015 20:56

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Try; Draw Sprites First.

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James H

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Joined: 21st Apr 2007

Location: St Helens

Posted: 27th Dec 2015 21:25

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You will need to use "set backdrop off" as well because whenever you create 3D objects the backdrop for 3D is on by default. You can also use "draw to back" instead of "draw sprites first" if for some reason you need all 2D activity to be included but I think draw sprites last would be more useful.

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WickedX

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Location: A Mile High

Posted: 28th Dec 2015 01:14

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This snippet is self-explanatory.

backdrop off

autocam off
position camera 0.0, 10.0, 0.0

` Toggle (rem) these two functions.
` ---------------------------------
`draw to back ` text not displayed.
draw sprites first ` text displayed.

load image "tile.png", 1 ` 32x32 dark green image.
load image "background.bmp", 2 ` 640x480 background sprite image to match the screen resolution used.

make terrain 1, "heightmap.png" ` 512x512 grayscale image (black).
texture terrain 1, 1
position terrain 1, -256, 0, 256

sprite 1, 0, 0, 2
` Although it doesn't seem to matter in this demo, when a sprite gets rendered the backdrop will get turned on.
` Move the sprite half way across the screen. Notice the black background color on the left. Now rem the Set
` Sprite command, the black background is replaced by the camera backdrop color (dark blue).
` Since it don't matter, Set Sprite is only used here to make the black in my background sprite image opaque.
set sprite 1, 0, 0

do
   set cursor 0, 0
   print "Text Here!"

control camera using arrowkeys 0, 5, 1
loop

+ Code Snippet

backdrop off

autocam off
position camera 0.0, 10.0, 0.0

` Toggle (rem) these two functions.
` ---------------------------------
`draw to back ` text not displayed.
draw sprites first ` text displayed.

load image "tile.png", 1 ` 32x32 dark green image.
load image "background.bmp", 2 ` 640x480 background sprite image to match the screen resolution used.

make terrain 1, "heightmap.png" ` 512x512 grayscale image (black).
texture terrain 1, 1
position terrain 1, -256, 0, 256

sprite 1, 0, 0, 2
` Although it doesn't seem to matter in this demo, when a sprite gets rendered the backdrop will get turned on.
` Move the sprite half way across the screen. Notice the black background color on the left. Now rem the Set
` Sprite command, the black background is replaced by the camera backdrop color (dark blue).
` Since it don't matter, Set Sprite is only used here to make the black in my background sprite image opaque.
set sprite 1, 0, 0

do
   set cursor 0, 0
   print "Text Here!"

   control camera using arrowkeys 0, 5, 1
loop

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Derek Darkly

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Joined: 22nd Sep 2011

Location: Whats Our Vector, Victor?

Posted: 28th Dec 2015 02:00

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You could also try the "obsolete" command TEXTURE BACKDROP n which still works, at least in my version of DBP.

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DarkBASIC Professional Discussion / How to make sprite stay behind terrain? How to keep terrain in the foreground, and sprite in the background?