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Differences Between: [Versions 39 and 311]

   1  <?php
   2  
   3  /**
   4   *
   5   * Function code for the complex pow() function
   6   *
   7   * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
   8   * @license    https://opensource.org/licenses/MIT    MIT
   9   */
  10  namespace Complex;
  11  
  12  /**
  13   * Returns a complex number raised to a power.
  14   *
  15   * @param     Complex|mixed    $complex    Complex number or a numeric value.
  16   * @param     float|integer    $power      The power to raise this value to
  17   * @return    Complex          The complex argument raised to the real power.
  18   * @throws    Exception        If the power argument isn't a valid real
  19   */
  20  function pow($complex, $power)
  21  {
  22      $complex = Complex::validateComplexArgument($complex);
  23  
  24      if (!is_numeric($power)) {
  25          throw new Exception('Power argument must be a real number');
  26      }
  27  
  28      if ($complex->getImaginary() == 0.0 && $complex->getReal() >= 0.0) {
  29          return new Complex(\pow($complex->getReal(), $power));
  30      }
  31  
  32      $rValue = \sqrt(($complex->getReal() * $complex->getReal()) + ($complex->getImaginary() * $complex->getImaginary()));
  33      $rPower = \pow($rValue, $power);
  34      $theta = $complex->argument() * $power;
  35      if ($theta == 0) {
  36          return new Complex(1);
  37      }
  38  
  39      return new Complex($rPower * \cos($theta), $rPower * \sin($theta), $complex->getSuffix());
  40  }