Recurring behaviour without using Timer

zzap64

Hello
I'm trying to repeat various actions in loops without using the timer.
example, move an actor on a scene between two points in a recurring loop and also mirror'ing an actor image in a loop so it switches every second.
Any help much appreciated.

SAZ_1

moving between two points is done by telling that object if self pos X (or Y, if going up down) is less than 800 change attribute self motionX to 300 ... then if self posX is bigger than 2000 change attribute self motion x to -300 ( obviously subsitute the values with whatever you need in relation to the scene position and so on , but that works really well.)

pitso

lol i didn't understand half of what you guys said hahahah

HoneyTribeStudios

You can use the modulo function in conjunction with the game.timer

So in effect you saying every x seconds, do something.

zzap64

ah ha, the change self x,y did everything I needed it to do. thanks for the advice

HoneyTribeStudios

Also don't forget to get out your beige keyboard and use:
POKE 53272,21 make my game great
POKE 53272,23 make apple feature my game
POKE 53280,C borrow some of that Rovio unexplainable sticky magic

Works every time

Clouds

@zzap64

"example, move an actor [in] a scene between two points in a recurring loop"

Constrain X position to:
AAA*cos( self.Time *BBB)+CCC

AAA = the size of the movement from the centre point - so sticking 500 here will move your object 250 pixels left of the centre point and then 250 pixels right of the centre point and then 250 pixels left and then 250 pixels right of the centre point . . . . forever or up until you die, whichever comes first.

BBB = the speed of the movement.

CCC = the centre point of the movement.

In this example (100*cos( self.Time *100)+400) the actor will move left and right in a loop, 50 pixels each way . . . so it will move from 350 to 450 back and forth forever (see caveats above about your own demise).

Clouds

"also mirror'ing an actor image in a loop so it switches every second"

1) Get your actor . . . inside GS make a copy . . . flip the second actor horizontally.

2) Place both actors in the scene on top of each other.

3) On the top actor place a timer: Every 1 second change attribute alpha to 1-alpha.

zzap64

thanks Tynan, very useful.

zzap64

for the flip, i just changed the flip horizontal attribute when it reached the x,y.