// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

// @dart = 2.9

/// @assertion double atan2(num a, num b)
/// Returns the angle in radians between the positive x-axis and the vector
/// ([b], [a]).
/// @description Checks set of values.
/// @author msyabro
/// @reviewer pagolubev
/// @3rdparty sputnik-v1:S15.8.2.2_A5.js
/// @needsreview Returned value precision is not specified.
/// Checks exact match with values calculated with LibC.


import "dart:math" as Math;
import "../../Utils/expect.dart";

main() {
  int vnum = 64;
  var x1 = new List(64);
  x1[0] = -16.00000000000000000000;
  x1[1] = -15.49206349206349200000;
  x1[2] = -14.98412698412698400000;
  x1[3] = -14.47619047619047600000;
  x1[4] = -13.96825396825396800000;
  x1[5] = -13.46031746031746000000;
  x1[6] = -12.95238095238095300000;
  x1[7] = -12.44444444444444500000;
  x1[8] = -11.93650793650793700000;
  x1[9] = -11.42857142857142900000;
  x1[10] = -10.92063492063492100000;
  x1[11] = -10.41269841269841300000;
  x1[12] = -9.90476190476190510000;
  x1[13] = -9.39682539682539720000;
  x1[14] = -8.88888888888888930000;
  x1[15] = -8.38095238095238140000;
  x1[16] = -7.87301587301587350000;
  x1[17] = -7.36507936507936560000;
  x1[18] = -6.85714285714285770000;
  x1[19] = -6.34920634920634970000;
  x1[20] = -5.84126984126984180000;
  x1[21] = -5.33333333333333390000;
  x1[22] = -4.82539682539682600000;
  x1[23] = -4.31746031746031810000;
  x1[24] = -3.80952380952381020000;
  x1[25] = -3.30158730158730230000;
  x1[26] = -2.79365079365079440000;
  x1[27] = -2.28571428571428650000;
  x1[28] = -1.77777777777777860000;
  x1[29] = -1.26984126984127070000;
  x1[30] = -0.76190476190476275000;
  x1[31] = -0.25396825396825484000;
  x1[32] = 0.25396825396825307000;
  x1[33] = 0.76190476190476275000;
  x1[34] = 1.26984126984126890000;
  x1[35] = 1.77777777777777860000;
  x1[36] = 2.28571428571428470000;
  x1[37] = 2.79365079365079440000;
  x1[38] = 3.30158730158730050000;
  x1[39] = 3.80952380952381020000;
  x1[40] = 4.31746031746031630000;
  x1[41] = 4.82539682539682600000;
  x1[42] = 5.33333333333333210000;
  x1[43] = 5.84126984126984180000;
  x1[44] = 6.34920634920634800000;
  x1[45] = 6.85714285714285770000;
  x1[46] = 7.36507936507936380000;
  x1[47] = 7.87301587301587350000;
  x1[48] = 8.38095238095237960000;
  x1[49] = 8.88888888888888930000;
  x1[50] = 9.39682539682539540000;
  x1[51] = 9.90476190476190510000;
  x1[52] = 10.41269841269841100000;
  x1[53] = 10.92063492063492100000;
  x1[54] = 11.42857142857142700000;
  x1[55] = 11.93650793650793700000;
  x1[56] = 12.44444444444444300000;
  x1[57] = 12.95238095238095300000;
  x1[58] = 13.46031746031745900000;
  x1[59] = 13.96825396825396800000;
  x1[60] = 14.47619047619047400000;
  x1[61] = 14.98412698412698400000;
  x1[62] = 15.49206349206349000000;
  x1[63] = 16.00000000000000000000;


  var x2 = new List(64);
  x2[0] = -8.00000000000000000000;
  x2[1] = -7.74603174603174600000;
  x2[2] = -7.49206349206349210000;
  x2[3] = -7.23809523809523810000;
  x2[4] = -6.98412698412698420000;
  x2[5] = -6.73015873015873020000;
  x2[6] = -6.47619047619047630000;
  x2[7] = -6.22222222222222230000;
  x2[8] = -5.96825396825396840000;
  x2[9] = -5.71428571428571440000;
  x2[10] = -5.46031746031746050000;
  x2[11] = -5.20634920634920650000;
  x2[12] = -4.95238095238095260000;
  x2[13] = -4.69841269841269860000;
  x2[14] = -4.44444444444444460000;
  x2[15] = -4.19047619047619070000;
  x2[16] = -3.93650793650793670000;
  x2[17] = -3.68253968253968280000;
  x2[18] = -3.42857142857142880000;
  x2[19] = -3.17460317460317490000;
  x2[20] = -2.92063492063492090000;
  x2[21] = -2.66666666666666700000;
  x2[22] = -2.41269841269841300000;
  x2[23] = -2.15873015873015910000;
  x2[24] = -1.90476190476190510000;
  x2[25] = -1.65079365079365110000;
  x2[26] = -1.39682539682539720000;
  x2[27] = -1.14285714285714320000;
  x2[28] = -0.88888888888888928000;
  x2[29] = -0.63492063492063533000;
  x2[30] = -0.38095238095238138000;
  x2[31] = -0.12698412698412742000;
  x2[32] = 0.12698412698412653000;
  x2[33] = 0.38095238095238138000;
  x2[34] = 0.63492063492063444000;
  x2[35] = 0.88888888888888928000;
  x2[36] = 1.14285714285714230000;
  x2[37] = 1.39682539682539720000;
  x2[38] = 1.65079365079365030000;
  x2[39] = 1.90476190476190510000;
  x2[40] = 2.15873015873015820000;
  x2[41] = 2.41269841269841300000;
  x2[42] = 2.66666666666666610000;
  x2[43] = 2.92063492063492090000;
  x2[44] = 3.17460317460317400000;
  x2[45] = 3.42857142857142880000;
  x2[46] = 3.68253968253968190000;
  x2[47] = 3.93650793650793670000;
  x2[48] = 4.19047619047618980000;
  x2[49] = 4.44444444444444460000;
  x2[50] = 4.69841269841269770000;
  x2[51] = 4.95238095238095260000;
  x2[52] = 5.20634920634920560000;
  x2[53] = 5.46031746031746050000;
  x2[54] = 5.71428571428571350000;
  x2[55] = 5.96825396825396840000;
  x2[56] = 6.22222222222222140000;
  x2[57] = 6.47619047619047630000;
  x2[58] = 6.73015873015872930000;
  x2[59] = 6.98412698412698420000;
  x2[60] = 7.23809523809523720000;
  x2[61] = 7.49206349206349210000;
  x2[62] = 7.74603174603174520000;
  x2[63] = 8.00000000000000000000;


  var y = new List(64);
  y[0] = -2.03444393579570270000;
  y[1] = -2.03444393579570270000;
  y[2] = -2.03444393579570270000;
  y[3] = -2.03444393579570270000;
  y[4] = -2.03444393579570270000;
  y[5] = -2.03444393579570270000;
  y[6] = -2.03444393579570270000;
  y[7] = -2.03444393579570270000;
  y[8] = -2.03444393579570270000;
  y[9] = -2.03444393579570270000;
  y[10] = -2.03444393579570270000;
  y[11] = -2.03444393579570270000;
  y[12] = -2.03444393579570270000;
  y[13] = -2.03444393579570270000;
  y[14] = -2.03444393579570270000;
  y[15] = -2.03444393579570270000;
  y[16] = -2.03444393579570270000;
  y[17] = -2.03444393579570270000;
  y[18] = -2.03444393579570270000;
  y[19] = -2.03444393579570270000;
  y[20] = -2.03444393579570270000;
  y[21] = -2.03444393579570270000;
  y[22] = -2.03444393579570270000;
  y[23] = -2.03444393579570270000;
  y[24] = -2.03444393579570270000;
  y[25] = -2.03444393579570270000;
  y[26] = -2.03444393579570270000;
  y[27] = -2.03444393579570270000;
  y[28] = -2.03444393579570270000;
  y[29] = -2.03444393579570270000;
  y[30] = -2.03444393579570270000;
  y[31] = -2.03444393579570270000;
  y[32] = 1.10714871779409040000;
  y[33] = 1.10714871779409040000;
  y[34] = 1.10714871779409040000;
  y[35] = 1.10714871779409040000;
  y[36] = 1.10714871779409040000;
  y[37] = 1.10714871779409040000;
  y[38] = 1.10714871779409040000;
  y[39] = 1.10714871779409040000;
  y[40] = 1.10714871779409040000;
  y[41] = 1.10714871779409040000;
  y[42] = 1.10714871779409040000;
  y[43] = 1.10714871779409040000;
  y[44] = 1.10714871779409040000;
  y[45] = 1.10714871779409040000;
  y[46] = 1.10714871779409040000;
  y[47] = 1.10714871779409040000;
  y[48] = 1.10714871779409040000;
  y[49] = 1.10714871779409040000;
  y[50] = 1.10714871779409040000;
  y[51] = 1.10714871779409040000;
  y[52] = 1.10714871779409040000;
  y[53] = 1.10714871779409040000;
  y[54] = 1.10714871779409040000;
  y[55] = 1.10714871779409040000;
  y[56] = 1.10714871779409040000;
  y[57] = 1.10714871779409040000;
  y[58] = 1.10714871779409040000;
  y[59] = 1.10714871779409040000;
  y[60] = 1.10714871779409040000;
  y[61] = 1.10714871779409040000;
  y[62] = 1.10714871779409040000;
  y[63] = 1.10714871779409040000;

  for (int i = 0; i < vnum; i++) {
    Expect.equals(y[i], Math.atan2(x1[i], x2[i]));
  }
}