/** * Returns the best solution for a given pass of a participant * @return array An associated array containing the best solution * @access public */ public function getBestSolution($solutions) { $user_solution = array(); foreach ($solutions as $idx => $solution_value) { if (preg_match("/^(\\\$v\\d+)\$/", $solution_value["value1"], $matches)) { $user_solution[$matches[1]] = $solution_value["value2"]; $varObj = $this->getVariable($matches[1]); $varObj->setValue($solution_value["value2"]); } else { if (preg_match("/^(\\\$r\\d+)\$/", $solution_value["value1"], $matches)) { if (!array_key_exists($matches[1], $user_solution)) { $user_solution[$matches[1]] = array(); } $user_solution[$matches[1]]["value"] = $solution_value["value2"]; } else { if (preg_match("/^(\\\$r\\d+)_unit\$/", $solution_value["value1"], $matches)) { if (!array_key_exists($matches[1], $user_solution)) { $user_solution[$matches[1]] = array(); } $user_solution[$matches[1]]["unit"] = $solution_value["value2"]; } } } } foreach ($this->getResults() as $result) { $resVal = $result->calculateFormula($this->getVariables(), $this->getResults(), parent::getId(), false); if (is_object($result->getUnit())) { $user_solution[$result->getResult()]["unit"] = $result->getUnit()->getId(); $user_solution[$result->getResult()]["value"] = $resVal; } else { if ($result->getUnit() == NULL) { $unit_factor = 1; // there is no fix result_unit, any "available unit" is accepted $available_units = $result->getAvailableResultUnits(parent::getId()); $result_name = $result->getResult(); if ($available_units[$result_name] != NULL) { $check_unit = in_array($user_solution[$result_name]['unit'], $available_units[$result_name]); } if ($check_unit == true) { //get unit-factor $unit_factor = assFormulaQuestionUnit::lookupUnitFactor($user_solution[$result_name]['unit']); $user_solution[$result->getResult()]["value"] = round(ilMath::_div($resVal, $unit_factor), 55); } } } if ($result->getResultType() == assFormulaQuestionResult::RESULT_CO_FRAC || $result->getResultType() == assFormulaQuestionResult::RESULT_FRAC) { $value = assFormulaQuestionResult::convertDecimalToCoprimeFraction($resVal); if (is_array($value)) { $frac_helper = $value[1]; $value = $value[0]; } $user_solution[$result->getResult()]["value"] = $value; $user_solution[$result->getResult()]["frac_helper"] = $frac_helper; } elseif ($result->getPrecision() > 0) { $user_solution[$result->getResult()]["value"] = round($resVal, $result->getPrecision()); } else { $user_solution[$result->getResult()]["value"] = round($resVal); } } return $user_solution; }
public static function _sub($left_operand, $right_operand, $scale = 50) { if (function_exists("bcsub")) { return bcsub(ilMath::exp2dec($left_operand), ilMath::exp2dec($right_operand), $scale); } else { $res = $left_operand - $right_operand; if (is_numeric($scale)) { $res = round($res, $scale); } return $res; } }
/** * @param $fNumber * @return string * function fixes problem which occur when locale ist set to de_DE for example, * because bc* function expecting strings */ private static function bcconv($fNumber) { $fNumber = ilMath::exp2dec($fNumber); $locale_info = localeconv(); if ($locale_info["decimal_point"] != ".") { $sAppend = ''; $iDecimals = ini_get('precision') - floor(log10(abs($fNumber))); if (0 > $iDecimals) { $fNumber *= pow(10, $iDecimals); $sAppend = str_repeat('0', -$iDecimals); $iDecimals = 0; } return number_format($fNumber, $iDecimals, '.', '') . $sAppend; } return $fNumber; }
function getBaseValue() { if (!is_object($this->getUnit())) { return $this->value; } else { include_once "./Services/Math/classes/class.ilMath.php"; return ilMath::_mul($this->value, $this->getUnit()->getFactor()); } }
public function getRangeMaxBase() { if (is_numeric($this->getRangeMax())) { if (is_object($this->getUnit())) { include_once "./Services/Math/classes/class.ilMath.php"; return ilMath::_mul($this->getRangeMax(), $this->getUnit()->getFactor(), 100); } } return $this->getRangeMax(); }
function pfx($tokens, $vars = array()) { if ($tokens == false) { return false; } $stack = new EvalMathStack(); foreach ($tokens as $token) { // nice and easy // if the token is a binary operator, pop two values off the stack, do the operation, and push the result back on if (in_array($token, array('+', '-', '*', '/', '^'))) { if (is_null($op2 = $stack->pop())) { return $this->trigger("internal error"); } if (is_null($op1 = $stack->pop())) { return $this->trigger("internal error"); } include_once "class.ilMath.php"; switch ($token) { case '+': $stack->push(ilMath::_add($op1, $op2)); break; case '-': $stack->push(ilMath::_sub($op1, $op2)); break; case '*': $stack->push(ilMath::_mul($op1, $op2)); break; case '/': if ($op2 == 0) { return $this->trigger("division by zero"); } $stack->push(ilMath::_div($op1, $op2)); break; case '^': $stack->push(ilMath::_pow($op1, $op2)); break; } // if the token is a unary operator, pop one value off the stack, do the operation, and push it back on } elseif ($token == "_") { $stack->push(-1 * $stack->pop()); // if the token is a function, pop arguments off the stack, hand them to the function, and push the result back on } elseif (preg_match("/^([a-z]\\w*)\\(\$/", $token, $matches)) { // it's a function! $fnn = $matches[1]; if (in_array($fnn, $this->fb)) { // built-in function: if (is_null($op1 = $stack->pop())) { return $this->trigger("internal error"); } $fnn = preg_replace("/^arc/", "a", $fnn); // for the 'arc' trig synonyms if ($fnn == 'ln') { $fnn = 'log'; } eval('$stack->push(' . $fnn . '($op1));'); // perfectly safe eval() } elseif (array_key_exists($fnn, $this->f)) { // user function // get args $args = array(); for ($i = count($this->f[$fnn]['args']) - 1; $i >= 0; $i--) { if (is_null($args[$this->f[$fnn]['args'][$i]] = $stack->pop())) { return $this->trigger("internal error"); } } $stack->push($this->pfx($this->f[$fnn]['func'], $args)); // yay... recursion!!!! } // if the token is a number or variable, push it on the stack } else { if (is_numeric($token)) { $stack->push($token); } elseif (($hex = $this->from_hexbin($token)) !== FALSE) { $stack->push($hex); } elseif (array_key_exists($token, $this->v)) { $stack->push($this->v[$token]); } elseif (array_key_exists($token, $vars)) { $stack->push($vars[$token]); } else { return $this->trigger("undefined variable '{$token}'"); } } } // when we're out of tokens, the stack should have a single element, the final result if ($stack->count != 1) { return $this->trigger("internal error"); } return $stack->pop(); }