SPRITE MANAGEMENT: MOVING PARALLEL SPRITES

This example shows how to move sprites by using the multitasking feature, assigning a movement routine to each sprite.

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SOURCE CODE ()

BITMAP ENABLE (2)

CONST spriteCount = 8

DEFINE TASK COUNT spriteCount

DIM sprites AS SPRITE (spriteCount)
DIM x AS POSITION (spriteCount)
DIM y AS POSITION (spriteCount)

spriteImage = LOAD IMAGE("drop.png")

GLOBAL sprites,x,y,spriteImage

PARALLEL PROCEDURE dropDown
    SPRITE [sprites] ENABLE
    DO
        [x] = RANDOM WIDTH
        FOR [y] = 0 TO SCREEN HEIGHT + IMAGE HEIGHT(spriteImage)
            SPRITE [sprites] AT [x], [y] COLOR BLUE
        NEXT
    LOOP
END PROC    

drops = 0
dropskip = (BYTE) ( SPRITE HEIGHT * 2 )

FOR i=0 TO SPRITE COUNT -1
    sprites(i) = SPRITE(spriteImage)
NEXT

SPAWN dropDown

DO
    IF drops < (spriteCount-1) THEN
        DEC dropskip
        IF dropskip = 0 THEN
            SPAWN dropDown
            dropskip = SPRITE HEIGHT
            INC drops
        ENDIF
    ENDIF
    RUN PARALLEL
LOOP

How to compile and run the example

The instructions here refer to compiling the example from the command line. For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile each single example with just one click.

Are instructions for your specific home computer / console missing? First of all, check if your computer is supported by clicking here. If so, since ugBASIC is a language which does not provide abstractions, it is possible that this example will not work on your target. If you think this is an issue, please click here.

Coleco Vision, Dina (Chuang Zao Zhe 50), SpectraVideo SV-603 VGA

In order to compile the example, type this command on the command line:

Linux

ugbc.coleco -O rom -o sprites_example_02.rom sprites_example_02.bas

Windows

ugbc.coleco.exe -O rom -o sprites_example_02.rom sprites_example_02.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

SEGA SC-3000

In order to compile the example, type this command on the command line:

Linux

ugbc.sc3000 -O rom -o sprites_example_02.rom sprites_example_02.bas

Windows

ugbc.sc3000.exe -O rom -o sprites_example_02.rom sprites_example_02.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

SEGA SG-1000

In order to compile the example, type this command on the command line:

Linux

ugbc.sg1000 -O rom -o sprites_example_02.rom sprites_example_02.bas

Windows

ugbc.sg1000.exe -O rom -o sprites_example_02.rom sprites_example_02.bas

For Microsoft Windows users we suggest using UGBASIC-IDE, which allows you to download and compile this example with just one click.

Any problem?

If you have found a problem trying to run this example, if you think there is a bug or, more simply, you would like it to be improved, open an issue for this example on GitHub.
Thank you!

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