Skip to main content

Fencing ( Latitude Longitude )

 Check Lat/Long is Inside/Outside of fencing


<?php

function onLine($side,$point)  //check whether p is on the line or not

{


  if($point['x'] <= max($side['x']['x'], $side['y']['x']) && $point['x'] <= min($side['x']['x'], $side['y']['x']) &&

   ($point['y'] <= max($side['x']['y'], $side['y']['y']) && $point['y'] <= min($side['x']['y'], $side['y']['y'])))

      return true;


return false;

}

function direction($point1,$point2,$point3)

{

   $val=($point2['y']-$point1['y'])*($point3['x']-$point2['x'])-($point2['x']-$point1['x'])*($point3['y']-$point2['y']);

   if ($val == 0)

   return 0; //colinear

   else if($val <0)

   return 2;          //anti-clockwise direction

   return 1;          //clockwise direction


}

function isIntersect($side,$exline)

{


  //four direction for two lines and points of other line

 $dir1 = direction($side['x'], $side['y'], $exline['x']);

 $dir2 = direction($side['x'], $side['y'], $exline['y']);

 $dir3 = direction($exline['x'], $exline['y'], $side['x']);

 $dir4 = direction($exline['x'], $exline['y'], $side['y']);


 if($dir1 != $dir2 && $dir3 != $dir4)

   return true;           //they are intersecting

if($dir1==0 && onLine($side, $exline['x']))        //when p2 of line2 are on the line1

   return true;

if($dir2==0 && onLine($side, $exline['y']))         //when p1 of line2 are on the line1

   return true;

if($dir3==0 && onLine($exline, $side['x']))       //when p2 of line1 are on the line2

   return true;

if($dir4==0 && onLine($exline, $side['y'])) //when p1 of line1 are on the line2

   return true;

return false;


}

function checkInside($polygon,$point,$n)

{

  if($n < 3) //when polygon has less than 3 edge, it is not polygon

   return false;

echo "<pre>";

   $exline=array('x'=>$point,'y'=>array('x'=>999999,'y'=>$point['y']));//create a point at infinity, y is same as point p

   $count=0;

   $i=0;

   do {

     $m=($i+1)%$n;

     $side=array('x'=>$polygon[$i],'y'=>$polygon[$m]);//forming a line from two consecutive points of poly


     if(isIntersect($side,$exline))  //if side is intersects exline

     {

       if(direction($side['x'], $point, $side['y']) == 0)

            return onLine($side, $point);

             $count++;

     }


     $i = ($i+1)%$n;

   }

   while($i != 0);

   return $count&1;


}

$polygon=array(

          array('x'=>0,'y'=>0),

          array('x'=>10,'y'=>0),

          array('x'=>10,'y'=>10),

          array('x'=>0,'y'=>10));

$point=array('x'=>9,

            'y'=>9);

$n=4;

if(checkInside($polygon,$point,$n))

{

echo "User is inside the Polygon";


}

else {

  echo "User is outside the Polygon";

}

?>


Labels:

Comments

Post a Comment

Popular posts from this blog

SETUP REST API IN CI

1. Create Rest_controller.php inside controllers and paste code: <?php defined('BASEPATH') OR exit('No direct script access allowed'); require APPPATH . '/libraries/API_Controller.php'; class Rest_controller extends API_Controller { public function __construct() { parent::__construct(); } public function index() { $this->api_return(             [ 'status' => true,                'result' => "Welcome to Testservices."             ],         200); } } ?> 2. Create api.php inside config and paste code : <?php defined('BASEPATH') OR exit('No direct script access allowed'); /**  * API Key Header Name  */ $config['api_key_header_name'] = 'X-API-KEY'; /**  * API Key GET Request Parameter Name  */ $config['api_key_get_name'] = 'key'; /**  * API Key POST Request Parameter Name ...
2 comments
Read more

NGrok Setup

 https://dashboard.ngrok.com/get-started/setup 1. Unzip to install On Linux or Mac OS X you can unzip ngrok from a terminal with the following command. On Windows, just double click ngrok.zip to extract it. unzip /path/to/ngrok.zip 2. Connect your account Running this command will add your authtoken to the default ngrok.yml configuration file. This will grant you access to more features and longer session times. Running tunnels will be listed on the endpoints page of the dashboard. ngrok config add-authtoken 1woFn9zVqcI4VeGuSIiN2VtmnPa_ZXuAuF1AAPkqApr7WVsQ 3. Fire it up Read the documentation on how to use ngrok. Try it out by running it from the command line: ngrok help To start a HTTP tunnel forwarding to your local port 80, run this next: ngrok http 80
Post a Comment
Read more

API ( service ) Image or Video Upload

## SAVE  VIDEO public function uploadmedia() { $target_path = "assets/uploads/"; $target_path = $target_path . basename($_FILES['file']['name']); if(move_uploaded_file($_FILES['file']['tmp_name'], $target_path)) { $this->api_return( [ 'status' => true,    'result' => 'uploaded success' ], 200); } else{ $this->api_return( [ 'status' => false,    'result' => 'failed' ], 20); } } ## SAVE FILE IMAGE OR VIDEO public function savefile() { $filetype = $_FILES['file']['type']; if (strpos($filetype, 'image') !== false) { $type = 'image'; } if (strpos($filetype, 'video') !== false) { $type = 'video'; }         $filename = trim($_FILES['file']['name']); // $userid = trim($this->input->get('userid'));...
Post a Comment
Read more