Examples with UnitSphereRandomVectorGenerator org.apache.commons.math3.random.UnitSphereRandomVectorGenerator used on opensource projects

Example 1 with UnitSphereRandomVectorGenerator

use of org.apache.commons.math3.random.UnitSphereRandomVectorGenerator in project GDSC-SMLM by aherbert.

the class AiryPSFModel method sample.

/**
	 * Sample from an Airy distribution
	 * 
	 * @param n
	 *            The number of samples
	 * @param x0
	 *            The centre in dimension 0
	 * @param x1
	 *            The centre in dimension 1
	 * @param w0
	 *            The Airy width for dimension 0
	 * @param w1
	 *            The Airy width for dimension 1
	 * @return The sample x and y values
	 */
public double[][] sample(final int n, final double x0, final double x1, final double w0, final double w1) {
    this.w0 = w0;
    this.w1 = w1;
    if (spline == null)
        createAiryDistribution();
    double[] x = new double[n];
    double[] y = new double[n];
    final RandomGenerator random = rand.getRandomGenerator();
    UnitSphereRandomVectorGenerator vg = new UnitSphereRandomVectorGenerator(2, random);
    int c = 0;
    for (int i = 0; i < n; i++) {
        final double p = random.nextDouble();
        if (p > POWER[SAMPLE_RINGS]) {
            // TODO - We could add a simple interpolation here using a spline from AiryPattern.power()
            continue;
        }
        final double r = spline.value(p);
        // Convert to xy using a random vector generator
        final double[] v = vg.nextVector();
        x[c] = v[0] * r * w0 + x0;
        y[c] = v[1] * r * w1 + x1;
        c++;
    }
    if (c < n) {
        x = Arrays.copyOf(x, c);
        y = Arrays.copyOf(y, c);
    }
    return new double[][] { x, y };
}