44 lines
1.3 KiB
Java
44 lines
1.3 KiB
Java
import java.awt.Point;
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import java.util.Random;
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import Jama.Matrix;
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public class Randomizer {
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Random random;
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public Randomizer() {
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random = new Random();
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}
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public int nextGaussianWithinRange(double rangeBegin, double rangeEnd) {
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double rangeMean = (rangeEnd - rangeBegin) / 2.0;
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double rangeSTD = (rangeEnd - rangeMean) / 3.0;
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double result = random.nextGaussian() * rangeSTD + rangeMean;
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while (result > rangeEnd || result < rangeBegin) {
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result = random.nextGaussian() * rangeSTD + rangeMean;
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}
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return (int) result;
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}
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public Point generatePeakForTransformationParabola(int pathDistance) {
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double maxTransformationScale = 0.2;
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int peakX = nextGaussianWithinRange(0, pathDistance);
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int peakY = nextGaussianWithinRange(0, pathDistance * maxTransformationScale);
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return new Point(peakX, peakY);
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}
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public double[] generateParabolaEquation(int pathDistance, Point peakPoint) {
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double[][] lhsMatrix = {{0, 0, 1}, {peakPoint.x * peakPoint.x, peakPoint.x, 1}, {pathDistance * pathDistance, pathDistance, 1}};
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double[][] rhsMatrix = {{0, peakPoint.y, 0}};
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Matrix lhs = new Matrix(lhsMatrix);
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Matrix rhs = new Matrix(rhsMatrix);
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Matrix ans = lhs.solve(rhs);
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double[] result = {ans.get(0, 0), ans.get(1, 0), ans.get(2, 0)};
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return result;
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}
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//public Point transformPoint
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}
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