Taking my project further - GameCreators Forum

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HartGames

18

Years of Service

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Joined: 17th Nov 2005

Location: UK

Posted: 30th Apr 2007 22:08

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Hi! I've just started my first project, a 2d sprite based game. I've set up the player and set some borders.

What I want to try and do next is to spawn "enemy" sprites along the top of the screen and make them move down. Gradually increasing the spawn rate. But I have no idea how to do this

. If any of you could point me to a Tutorial or have any general tips it would be greatly appreciated.

So far:

+ Code Snippet

REM Project: FirstProject
REM Created: 29/04/2007 18:04:08
REM
REM ***** Main Source File *****
REM
HIDE MOUSE

LOAD IMAGE "plr.jpg", 1
LOAD IMAGE "em.jpg", 2
x# = 50
y# = 50
DO
   CLS
   INC spriteno, 1
REM Set Up Sprite
   SPRITE 1,x#,y#,1
REM Set up Controls
   IF Rightkey()=1 THEN INC x#, 0.1
   IF LeftKey()=1 THEN DEC x#, 0.1
   IF UPKEY()=1 THEN DEC y#, 0.1
   IF DOwnkey()=1 THEN INC y#, 0.1
REM Set Borders
   IF x#>575 THEN x#=575
   IF x#<25 THEN x#=25
   IF y#>435 THEN y#=435
   IF y#<25 THEN y#=25
LOOP

END

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Tom J

19

Years of Service

User Offline

Joined: 4th Aug 2005

Location: Essex, England

Posted: 30th Apr 2007 23:39 Edited at: 30th Apr 2007 23:42

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Use the timer to get a spawn rate:

+ Code Snippet

time=timer()
spawnrate=5
enemynumber=2
do
if (timer()-time)/1000>spawnrate
    time=timer()
    if spawnrate>1 then dec spawnrate,1
    sprite enemynumber,320,0,2
    inc enemynumber
endif
loop

Possibly something like that,

Also you should get rid of the cls in your loop.