From 75160b12821f7f4299cce7f0b69c83c1502ae071 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anton=20Luka=20=C5=A0ijanec?= <anton@sijanec.eu>
Date: Mon, 27 May 2024 13:08:29 +0200
Subject: 2024-02-19 upstream

---
 .../complex/classes/src/functions/theta.php        | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 vendor/markbaker/complex/classes/src/functions/theta.php

(limited to 'vendor/markbaker/complex/classes/src/functions/theta.php')

diff --git a/vendor/markbaker/complex/classes/src/functions/theta.php b/vendor/markbaker/complex/classes/src/functions/theta.php
new file mode 100644
index 0000000..cdba45e
--- /dev/null
+++ b/vendor/markbaker/complex/classes/src/functions/theta.php
@@ -0,0 +1,40 @@
+<?php
+
+/**
+ *
+ * Function code for the complex theta() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the theta of a complex number.
+ *   This is the angle in radians from the real axis to the representation of the number in polar coordinates.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    float            The theta value of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+if (!function_exists(__NAMESPACE__ . '\\theta')) {
+    function theta($complex): float
+    {
+        $complex = Complex::validateComplexArgument($complex);
+
+        if ($complex->getReal() == 0.0) {
+            if ($complex->isReal()) {
+                return 0.0;
+            } elseif ($complex->getImaginary() < 0.0) {
+                return M_PI / -2;
+            }
+            return M_PI / 2;
+        } elseif ($complex->getReal() > 0.0) {
+            return \atan($complex->getImaginary() / $complex->getReal());
+        } elseif ($complex->getImaginary() < 0.0) {
+            return -(M_PI - \atan(\abs($complex->getImaginary()) / \abs($complex->getReal())));
+        }
+
+        return M_PI - \atan($complex->getImaginary() / \abs($complex->getReal()));
+    }
+}
-- 
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