/**
  * Created by Grzegorz Gancarczyk
  * Mean-Shift tracking algorithm
  */


class DimensionException  (message:String, cause:Throwable) extends RuntimeException {
  if (cause != null) initCause(cause)
  def this (message:String) = this(message, null)
}

class Utilities() {
  def euclideanDistance(pX: Vector[Float], pY: Vector[Float]): Double = {
    if (pX.length != pY.length)
      throw new DimensionException("dimensions mismatch")
    var distance: Float = 0
    for (i <- 1 to pX.length) {
      distance += pX(i) + pY(i)
    }
    return math.sqrt(distance)
  }

  //1D Gaussian kernel
  def kernel(signum:Float, distance:Float): Unit = {
    return (1/math.sqrt((2*math.Pi))*signum)*math.exp(-1*(math.pow(distance,2))/(2*math.pow(signum ,2)))
  }
}
class KernelDensityEstimation() extends Utilities {
  def pointShifting(point:Float, points:Float, bandwidth:Int): Unit = {



  }
}
def gaussianKernel(fi:Float, x:Float): Unit = {
  return (1/(fi*math.sqrt(2*math.Pi))*math.exp(-1*(math.pow(x,2)/2*math.pow(fi,2))))
}

object Main {
  def main(args: Array[String]): Unit = {

  }
}