Solved Creating a circle out of particles

Hello! So... I am trying to create a circle out of particles. If anyone could help me, that would be very nice!

Thanks for reading and have a nice day!

 

What have you tried?

 

@MrJossy

Depends how you want this circle to look, and what you're doing with it. Although I will give you a hint, trigonometry is very useful for this.

 

I would just create a 3D circle out of paticles. I tried to look for cos and sin formulas but I can't get the correct one. @mythbusterma

 

http://bukkit.org/threads/creating-a-helix-3d-spiral-out-of-particles.314312/page-2#post-3092472

 

@MrJossy

Since I realise that the math is not obvious to some, here's the math for you.

Code:

int scaleX = 1;  // use these to tune the size of your circle
int scaleY = 1;
double density = 0.1;  // smaller numbers make the particles denser

for (double i=0; i < 2 * Math.PI ; i +=density) {
     double x = Math.cos(i) * scaleX;
     double y = Math.sin(i) * scaleY;

     // spawn your particle here
}

 

Thank you very much! I will try this when I get home!

 

@mythbusterma @MrJossy I tried it, it works great. Just remember: the x is the actual x, but the double y should be z, and you should add it to player.getLocation().getZ or .getX.

 

@sgavster

Depends on what orientation you want the circle in. I was assuming X-Y.

 

@mythbusterma Yeah, I didn't think of that.. Lol, I'm not very smart today, it's vacation; thinking isn't my thing

 

Well... I tried and it does not seem to work. It creates a line. @mythbusterma

Code:

int scaleX = 2;
int scaleY = 2;
double density = 0.1;
for(double i = 0; i < 2 * Math.PI; i+=density){
   double x = Math.cos(i) * scaleX;
   double y = Math.cos(i) * scaleY;
                         
    PacketPlayOutWorldParticles packet = new PacketPlayOutWorldParticles("flame", (float) (loc.getX() + x), (float) (loc.getY()), (float) (loc.getZ() + z), 0, 0, 0, 0, 1);

   for (Player online : Bukkit.getOnlinePlayers()){ 
       ((CraftPlayer)online).getHandle().playerConnection.sendPacket(packet);
   }

 

@MrJossy

......how about you look at your code and actually read it.

 

I know that there is a Loc.getZ() + z but that was me! I got wrong copying the code from eclipse to here. In my code, it's Loc.getZ() + y

 

@MrJossy

Then why are you using the cosine function for both X and Y? One has to be sine, the other cosine.

 

Oh. Lol. I will fix that and see if it works. But the particles. Are they getX() + x and getZ() + y ?? @mythbusterma

EDIT: I fixed it. Thanks a lot to @mythbusterma