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<?php |
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|
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/** |
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* |
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* Function code for the complex multiplication operation |
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* |
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* @copyright Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex) |
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* @license https://opensource.org/licenses/MIT MIT |
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*/ |
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namespace Complex; |
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|
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/** |
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* Multiplies two or more complex numbers |
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* |
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* @param array of string|integer|float|Complex $complexValues The numbers to multiply |
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* @return Complex |
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*/ |
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function multiply(...$complexValues) |
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{ |
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if (count($complexValues) < 2) { |
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throw new \Exception('This function requires at least 2 arguments'); |
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} |
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|
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$base = array_shift($complexValues); |
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$result = clone Complex::validateComplexArgument($base); |
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|
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foreach ($complexValues as $complex) { |
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$complex = Complex::validateComplexArgument($complex); |
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|
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if ($result->isComplex() && $complex->isComplex() && |
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$result->getSuffix() !== $complex->getSuffix()) { |
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throw new Exception('Suffix Mismatch'); |
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} |
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|
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$real = ($result->getReal() * $complex->getReal()) - |
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($result->getImaginary() * $complex->getImaginary()); |
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$imaginary = ($result->getReal() * $complex->getImaginary()) + |
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($result->getImaginary() * $complex->getReal()); |
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|
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$result = new Complex( |
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$real, |
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$imaginary, |
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($imaginary == 0.0) ? null : max($result->getSuffix(), $complex->getSuffix()) |
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); |
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} |
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|
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return $result; |
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} |
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|
