Creating endless rounds of enemies with timing
saad1993
Member, BASIC Posts: 47
So I have a single enemy character that comes into scene and then increases its speed towards the player. I want to be able to create endless rounds of these enemies with about 3 to 4 seconds of a gap in between, like a breather, and increasing acceleration in every round.
I created a real attribute called gamerealtime and increased by 1 second every real second. In the enemy actor, I used that to spawn enemy actor for 12 seconds and then stop from 13 to 16 seconds. That was one rule, with an increase in linear velocity in X axis from -100 to -210. Second rule, increased speed to -240 and so on.
I have used a trigger to spawn and not-spawn enemy character. Boolean attribute called spawnenemy. Spawn actor is separate and hidden. In enemy actor, the attribute spawn enemy is triggered on in all the individual rules. For example, a rule named speed -210 will have: When gamerealtime is lessthan/equalto 12 and greaterthan/equalto 0, do changeattribute spawnenemy to true, timer every 0.3 secs changeattribute self.motion.linearvelocity.x to self.mot.... - 210.
The last part sort of brings the enemy in slow and then accelerates all of a sudden to the player.
The problem is, my rounds aren't working. The boolean is set to true initially. The first round spawns (-210), and the second round does (-240), third round and so on do not. I cannot figure out why.
Need help figuring this out.
Thanks!
Comments
This attribute already exists, game.time increases at the same rate, without the need for any rules or timers (and so on).
You could do this more simply with:
When game.time%16 < 12
--Spawn some stuff
Could you explain that to me? I have a separate hidden spawn actor for spawning. Plus I don't understand the % sign.
@tatiang has a better (more correct) understanding of modulus (the '%' sign), my own interpretation is that modulus 'loops' around the modulus value.
So game.time normally increases like this . . .
game.time = 1 2 3 4 5 6 7 8 9 10 11 12 13 14 . . . and so on.
But if you were to use game.time%5 then . . .
game.time = 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5 . . . and so on.
I believe game.time%5 would actually loop like: 0 1 2 3 4 0 1 2 3 4 0 1 2 3 4
That being said, I don't remember, but I thought game.time increases by 1 every millisecond or some smaller time interval than seconds
//
Modulus is the remainder of a division operation. So for example, if you divide 6 by 4, the remainder is 2. So you could also write this as 6÷4=1 R 2 or as 6%4=2. Another example is if you divide 6 by 10, the remainder is 6. So you could write it as 6÷10=0 R 6 or as 6%10=6. As @Socks explained, modulus is useful for looping values:
game.Time game.Time%16 game.Time%16 < 12 ?
————— ——————— ———————————
0 0 yes (spawn enemy!)
1 1 yes
2 2 yes
3 3 yes
... ...
11 11 yes
12 12 no
13 13 no
14 14 no
15 15 no
16 0 no
17 1 no
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Im not entirely sure where and how to use this to spawn enemies. Is this a string or numeric expression rule?
It's a mathematical operation, so for example you could use it in a numeric expression:
When game.time%16 < 12
--Spawn some stuff
:*