Online PHP editor | rfc for dQmdb

@ 2018-01-26T15:57:18Z

<?php

test(2000);
test(1845);
test(2340);
test(3000);

// Examples:
// Door           2000    1845    3000
// 615mm panel    1       3       5
// 495mm panel    3       0       0
// panel loss     100     0       75

function calcOptimalPanels ($doorHeight) {
  $bigHeight = 615;
  $smallHeight = 495;

  $bigFit = floor($doorHeight / $bigHeight);
  $smallFit = floor($doorHeight / $smallHeight);

  $options = [];

  for ($big = 0; $big <= $bigFit; $big++) {
    for ($small = 0; $small <= $smallFit; $small++) {
      $waste = $bigHeight * $big + $smallHeight * $small - $doorHeight;

      if ($waste === 0) // Get first combination without waste
        return getFormattedResult($big, $small, $waste);

      if ($waste < 0)  // Omit combinations smaller then door
        continue;

      $options[$waste] = getFormattedResult($big, $small, $waste);
    }
  }

  $minWaste = min(array_keys($options));

  return $options[$minWaste];
}

function getFormattedResult($big, $small, $waste) {
  return ['615mm' => $big, '495mm' => $small, 'waste' => $waste];
}

function test($doorHeight) {
    echo $doorHeight . ': ' . json_encode(calcOptimalPanels($doorHeight)) . "\n";
}

Output for git.master, git.master_jit, rfc.property-hooks: 2000: {"615mm":1,"495mm":3,"waste":100} 1845: {"615mm":3,"495mm":0,"waste":0} 2340: {"615mm":3,"495mm":1,"waste":0} 3000: {"615mm":1,"495mm":5,"waste":90}

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