Random Crusher animation

[rg80s]

Hi all

Im working on a game similar to those of Manic Miner, Jet Set Willy etc and Im struggling to create a routine whereas an object falls downwards at random intervals and if the player is under it they will lose a life? The object basically goes down and then back up.   Those that remember Monty Mole will remember the dreaded crushers - well thats the type of things im trying to create but struggling with a script?  Can anyone help at all?

[rg80s]

I think I may be answering my own question but I guess the answer is by using enemy movement up/down type event ? But try to put in a script where the object moves up and down at random intervals?

[lukebord1]

Hi rg80s. Right, you have to write an up/down movement choosing a "type" (1 to 8) for the enemy sprite. There's a pre-defined template in AGD for a vertical patrolling enemy which will help.
In order to perform a random interval, an idea could be to set a "start variable" using a RND condition in the main loop event, like this:


(main loop event)
IF C = 0
GETRANDOM 30 (generates a random number from 0 to 29)
IF RND > 20 (reducing the range of possibilites, in this case 21 to 29, the random interval will be less frequent)
LET C = 1 (activates the movement)
ENDIF
ENDIF


(enemy type event)
IF C = 1
...vertical patrolling script...

IF X > ... (gameplay lower limit)
LET C = 0 (reset the random switch variable)
ENDIF

IF X <= ... (gameplay upper limit)
LET C = 0 (reset the random switch variable)
ENDIF

ENDIF