Ropes.scala

package temportalist.ropes.common

import org.lwjgl.util.vector.Matrix3f

import scala.collection.mutable
import scala.collection.mutable.ListBuffer

/**
  * Created by TheTemportalist on 1/17/2016.
  */
object Ropes {

	def main(args: Array[String]): Unit = {
		println("hello world")

		val data = mutable.Map[Float, Float]()
		data(-5) = 1
		for (x <- -4 to 4) data(x) = 0
		data(5) = 1
		val dataAsArray = data.toArray

		val rows = data.size
		val matrixData = new Array[Array[Float]](rows)
		val yData = new Array[Array[Float]](rows)
		for (i <- 0 until rows) {
			val x = dataAsArray(i)._1
			matrixData(i) = Array[Float](1, x, Math.pow(x, 2).toFloat)
			yData(i) = Array[Float](dataAsArray(i)._2)
		}

		val matrix = this.getMatrix3f(matrixData)
		val mulMatrix = new Matrix3f
		Matrix3f.mul(matrix.transpose().asInstanceOf[Matrix3f], matrix, mulMatrix)
		val inverseMulMatrix = mulMatrix.invert()
		val outMatrix = new Matrix3f
		Matrix3f.mul(inverseMulMatrix.asInstanceOf[Matrix3f], matrix.transpose().asInstanceOf[Matrix3f], outMatrix)
		val coefficients = new Matrix3f
		Matrix3f.mul(outMatrix, this.getMatrix3f(yData), coefficients)

	}

	def getMatrix3f(matrix: Array[Array[Float]]): Matrix3f = {
		val matrixRet = new Matrix3f
		matrixRet.m00 = matrix(0)(0)
		matrixRet.m01 = matrix(0)(1)
		matrixRet.m02 = matrix(0)(2)
		matrixRet.m10 = matrix(1)(0)
		matrixRet.m11 = matrix(1)(1)
		matrixRet.m12 = matrix(1)(1)
		matrixRet.m20 = matrix(2)(0)
		matrixRet.m21 = matrix(2)(1)
		matrixRet.m22 = matrix(2)(2)
		matrixRet
	}

}