[Coordinate Grid Mapping (Battleship)]

Thanks for your reply. This is kinda what I came up with so far. It generates a pixel grid for X & Y coordinates. 

IDK maybe someone someday will find this useful? I figured I would share. it works for what I needed. 

 

GRID FUNCTION

<?php
public static function battleShipGrid($w, $h, $size)
{
  $totX = intval(floor($w / $size));
  $totY = intval(floor($h / $size));

  $xRanges = array();
  $yRanges = array();

  $xLimit = 0;
  while ($xLimit <= $totX) {
     $start = intval($xLimit * $size);
     $end = intval(($start + $size) - 1);

     if ($end > $w)
       $end = $w;

     $xRanges[] = range($start, $end);

     $xLimit++;
  }

  $yLimit = 0;
  while ($yLimit <= $totY) {
     $start = intval($yLimit * $size);
     $end = intval(($start + $size) - 1);

     if ($end > $h)
       $end = $h;

     $yRanges[] = range($start, $end);

     $yLimit++;
  }

  return array("x" => $xRanges, "y" => $yRanges, "xTotal" => $totX, "yTotal" => $totY);
}

 

SEARCH

public static function searchPoint($xTest, $yTest, $xRanges, $yRanges)
{
  $xResult = self::searchSquare($xTest, $xRanges);
  $yResult = self::searchSquare($yTest, $yRanges);

  return array("x" => $xResult, "y" => $yResult);
}

public static function searchSquare($needle, $haystack)
{
  $found = false;
  $current = 0;

  while ($found === false) {
    $x = $haystack[$current];
    if (in_array($needle, $x))
      $found = $current;

    $current++;
    if ($current > count($haystack))
      $found = "not_found";
  }

  if ($found !== "not_found")
    $result = $haystack[$found];
  else
    return false;

  $min = $result[0];
  $max = end($result);

  return array("key" => $found, "min" => $min, "max" => $max, "items" => $result);
}

 

USAGE EXAMPLE

<?php
// Getting example coordinates like this
$examplePoint = "1910,1070";

$points = explode(",", $examplePoint);
$xTest = intval($points[0]);
$yTest = intval($points[1]);

// We can find out which X & Y Square they can be found in.
$xResult = self::searchSquare($xTest, $xRanges);
$yResult = self::searchSquare($yTest, $yRanges);

?>

 

[Coordinate Grid Mapping (Battleship)]

Hello All!

I am struggling to build a script that is generating random images. I want to place a bunch of circles on a rectangular image. However I want those circles to appear in random locations.

I have been using the range($min,$max) function to keep track of "used" spaces on the X axis, based on the circle size, but I was wondering if there is a class somewhere that could simplify this.

Ideally, something that takes a given width and height, and breaks that into a group of "cells". 

IDK if any of you have played the game battle ship, but something like that. Id like to be able to do placeCircle("A1"); 

 

Does anyone have any suggestions? 

 

Thanks for reading!

JF