commit version 22.12.12447

2023-01-01 22:36:12 -05:00
parent af1b03d79f
commit b948283a96
744 changed files with 620715 additions and 27381 deletions
--- a/includes/weathermap/lib/WMVector.class.php
+++ b/includes/weathermap/lib/WMVector.class.php
@ -0,0 +1,121 @@
+<?php
+
+/**
+ * Utility class for 2D vectors.
+ * Mostly used in the VIA calculations
+ */
+class WMVector
+{
+    public $dx;
+    public $dy;
+
+    public function __construct($dx = 0, $dy = 0)
+    {
+        $this->dx = $dx;
+        $this->dy = $dy;
+    }
+
+    public function flip()
+    {
+        $this->dx = - $this->dx;
+        $this->dy = - $this->dy;
+    }
+
+    public function getAngle()
+    {
+        return rad2deg(atan2((-$this->dy), ($this->dx)));
+    }
+
+    public function getSlope()
+    {
+        if ($this->dx == 0) {
+            // special case - if slope is infinite, fudge it to be REALLY BIG instead. Close enough for TV.
+            wm_debug("Slope is infinite.\n");
+            return 1e10;
+        }
+        return ($this->dy / $this->dx);
+    }
+
+    /**
+     * @param float $angle
+     */
+    public function rotate($angle)
+    {
+        $points = array();
+        $points[0] = $this->dx;
+        $points[1] = $this->dy;
+
+        rotateAboutPoint($points, 0, 0, $angle);
+
+        $this->dx = $points[0];
+        $this->dy = $points[1];
+    }
+
+    /**
+     * @return WMVector
+     */
+    public function getNormal()
+    {
+        $len = $this->length();
+
+        if ($len==0) {
+            return new WMVector(0, 0);
+        }
+
+        return new WMVector($this->dy / $len, -$this->dx / $len);
+    }
+
+    /**
+     * Turn vector into unit-vector
+     */
+    public function normalise()
+    {
+        $len = $this->length();
+
+        if ($len > 0 && $len != 1) {
+            $this->dx = $this->dx / $len;
+            $this->dy = $this->dy / $len;
+        }
+    }
+
+    /**
+     * Calculate the square of the vector length.
+     * Save calculating a square-root if all you need to do is compare lengths
+     *
+     * @return float
+     */
+    public function squaredLength()
+    {
+        if (($this->dx == 0) && ($this->dy == 0)) {
+            return 0;
+        }
+        $squaredLength = ($this->dx) * ($this->dx) + ($this->dy) * ($this->dy);
+
+        return $squaredLength;
+    }
+
+    /**
+     * @return float
+     */
+    public function length()
+    {
+        if ($this->dx==0 && $this->dy==0) {
+            return 0;
+        }
+
+        return (sqrt($this->squaredLength()));
+    }
+
+    public function asString()
+    {
+        return $this->__toString();
+    }
+
+    /**
+     * @return string
+     */
+    public function __toString()
+    {
+        return sprintf("[%f,%f]", $this->dx, $this->dy);
+    }
+}