let positions = new Float32Array(n * 2);

let velocities = new Float32Array(n * 2);

​

const gpu = new GPU();

​

function setup() {

  createCanvas(400, 400);

  for(let i = 0; i < n * 2; i ++)

  {

      let posX = random(0,width);

      let posY = random(0,height);

      positions[i] = posX;

      positions[i+1] = posY;

      velocities[i] = random(-1.1);

      velocities[i+1] = random(-1,1);

  }

  frameRate(600);

}

​

​

function draw() {

  for(let i = 0; i < n * 2; i += 2)

  {

      circle(positions[i], positions[i+1], 2);

  }

​

​

  newpositions = moveGPU(positions, n);

  print(frameRate());

  //print(newpositions[50]); // out[particle id][axis]

  //noLoop();

}

​

  const moveGPU = gpu.createKernel(function(particles, n) {

    //let startOffset = this.thread.x%2;

    //let particlex = particles[this.thread.x - startOffset];

    //let particley = particles[this.thread.x - startOffset + 1];

    //let c = [0,0];

    //for(let i = 0; i < n ; i++){

      //c[0] += pos[i][0];

      //c[1] += pos[i][1];

      //c += pos[i];

    //}

    //return c /= n;

    return particles[this.thread.x];

  }).setOutput([n]);

​

function moveCPU(pos, n)

{

  let centers = [];

  for(let i = 0; i < n ; i++){

    let center = [0,0];

      for(let j = 0; j < n ; j++){

        center += pos[j];

      }

      center /= n

      centers.push(center);

    }

​

  return centers;

}

​