100 lines
2.2 KiB
PHP
100 lines
2.2 KiB
PHP
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<?php
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class beta5_ecm_library {
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var $index = array();
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var $ecmTable = array();
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var $eccmTable = array();
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var $probTables = array();
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function beta5_ecm_library($lib) {
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$this->lib = $lib;
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$this->db = $this->lib->game->db;
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}
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function getInformationLevel($ecm, $eccm) {
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// Get the probability table
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$probTable = $this->getProbabilityTable($ecm, $eccm);
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// Randomly selects an information level
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$p = rand(0,9999) / 10000;
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$i = 0;
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while ($p > $probTable[$i]) {
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$p -= $probTable[$i];
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$i ++;
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}
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return $i;
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}
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function getProbabilityTable($ecm, $eccm) {
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if (is_null($this->probTables[$ecm.','.$eccm])) {
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// Read ECM probability table
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$ecmTable = $this->getECMTable($ecm);
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// Read ECCM probability table
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$eccmTable = $this->getECCMTable($eccm);
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// Create combined probabilities
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$probTable = array();
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$tot = 0;
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for ($i=0;$i<4;$i++) {
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$probTable[$i] = 0;
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for ($j=0;$j<=$i;$j++) {
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$probTable[$i] += $ecmTable[$i-$j] * $eccmTable[$j];
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}
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$tot += $probTable[$i];
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}
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$probTable[4] = 1 - $tot;
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$this->probTables[$ecm.','.$eccm] = $probTable;
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}
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return $this->probTables[$ecm.','.$eccm];
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}
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function getECMTable($level) {
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if (is_null($this->ecmTable[$level])) {
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$qEcm = $this->db->query("SELECT probability FROM ecm WHERE ecm_level=$level ORDER BY info_level ASC");
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if (!($qEcm && dbCount($qEcm))) {
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return -1;
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}
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$this->ecmTable[$level] = array();
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while ($r = dbFetchArray($qEcm)) {
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array_push($this->ecmTable[$level], $r[0] / 100);
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}
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}
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return $this->ecmTable[$level];
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}
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function getECCMTable($level) {
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if (is_null($this->eccmTable[$level])) {
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$qEccm = $this->db->query("SELECT probability FROM eccm WHERE eccm_level=$level ORDER BY gain ASC");
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if (!($qEccm && dbCount($qEccm))) {
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return -1;
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}
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$this->eccmTable[$level] = array();
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while ($r = dbFetchArray($qEccm)) {
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array_push($this->eccmTable[$level], $r[0] / 100);
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}
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}
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return $this->eccmTable[$level];
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}
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function scrambleFleetPower($level, $power) {
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switch ($level) :
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case 0: return 'NULL';
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case 1: $rand = rand(0,49) - 25; break;
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case 2: $rand = rand(0,19) - 10; break;
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case 3: case 4: $rand = 0; break;
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endswitch;
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return $power + ($power * $rand / 100);
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}
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}
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?>
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