How to get a mob to spawn only when it's more than 500 blocks from x=0,z=0

[CaptainBobble]

This will be my first mod, I have no experience at all with java or forge. I'm trying to teach myself some stuff trough tutorials on-line. But i can't seem to find the specific information i need. I feel it shouldn't be such a difficult thing to achieve, altough it probably is. Any help would be greatly appreciated

[target.san]

Check LivingSpawnEvent class.

You'll need to work with Forge event bus to handle this event.

Look for Forge event tutorials.

One googled: http://minecraftforgetutorials.weebly.com/event-introduction.html

[delpi]

If you have no experience with Java, go on youtube, watch several tutorial and program in java for a weekend before starting at a minimum.  If you have no programming experience at all, take longer.

[CaptainBobble]

Thanks, both of you. I realize i should follow a few tutorials first before starting with this, because right now i don't even know how to start I'm not going to give up though i'll see this trough until i have something i'm happy with.

 

I'll explain a little better what my goal is.

I'd like to make a mod in which for example a custom mob starts spawning from x=500 to x=1000 and then have another custom mob spawn from x=1000 to x=1500 and so on.

 

The idea is that the further you are away from spawn the more difficult the mobs will be to kill.

[larsgerrits]

But spawn isn't always on x=0 and z=0. It is always randomized.

[CaptainBobble]

yeah sorry, i meant spawnpoint. I thought they were the same, but that probabbly will make it more difficult.

[SanAndreaP]

yeah sorry, i meant spawnpoint. I thought they were the same, but that probabbly will make it more difficult.

 

To control where the mob spawns, override getCanSpawnHere and return wheter it should spawn (true) or not (false)

 

To check a radius, do this:

Math.abs(spawnX - entityX) >= 500 && Math.abs(spawnZ - entityZ) >= 500

will check if it's not in a 500x500 squared perimeter around the spawn

Math.sqrt(Math.pow(spawnX - entityX, 2) >= 500 && Math.pow(spawnZ - entityZ, 2)) >= 500

will check if it's not in a circle perimeter with radius 500 around the spawn (I think the math is right, don't count me on that, though)

[sequituri]

Rather than invoking library code to compute limits, just use:

boolean farEnough(int entityX, int entityY, int spawnX, int spawnY) {
    int dx = spawnX - entityX, dy = spawnY - entityY;
    return (dx*dx + dy*dy > 500*500);
}

[SanAndreaP]

Rather than invoking library code to compute limits, just use:

boolean farEnough(int entityX, int entityY, int spawnX, int spawnY) {
    int dx = spawnX - entityX, dy = spawnY - entityY;
    return (dx*dx + dy*dy > 500*500);
}

 

That works, too and is less resource-intensive.

[CaptainBobble]

Thanks guys this will definitely get the ball rolling. I'm going to need to learn some java for sure but this made things a million times easier already.