/**
* Save 'calculation' question type to QTI XML
* @param ST_Question_Calculation $question Reference to the question object
* @author Adam Clarke, Rob Ingram
*/
function SaveCalculation(&$question)
{
if ($question->q_type == 'enhancedcalc') {
$this->SaveEnhancedCalc($question);
return;
}
$question->formula = trim($question->formula);
if (substr($question->formula, 0, 1) == "=") {
$question->formula = substr($question->formula, 1);
}
$question->origleadin = $question->leadin;
$q_text = $question->leadin;
// format the text for the question
// replace all variables in leadin with randomly generated values
foreach ($question->variables as $var => $vairable) {
${$var} = MathsUtils::gen_random_no(checkVariables($vairable->min), checkVariables($vairable->max), $vairable->inc, $vairable->dec);
$q_text = str_ireplace("\${$var}", ${$var}, $q_text);
}
eval("\$answer = " . $question->formula . ";");
//echo $q_text."<BR>";
$question->leadin = $q_text;
list($headertext, $title) = $this->MakeQuestionHeader($question);
$type = "Calculation";
$ob = new OB();
$ob->ClearAndSave();
include "qti12/tmpl/calculation.php";
$this->output .= $ob->GetContent();
$ob->Restore();
}
function SaveCalculation(&$question)
{
// TODO : NO template
// format the text for the question
foreach ($question->variables as $var => $vairable) {
${$var} = MathsUtils::gen_random_no(checkVariables($vairable->min), checkVariables($vairable->max), $vairable->inc, $vairable->dec);
}
eval("\$answer = " . $question->formula . ";");
$q_text = $question->leadin;
$q_text = str_ireplace("\$A", $A, $q_text);
$q_text = str_ireplace("\$B", $B, $q_text);
$q_text = str_ireplace("\$C", $C, $q_text);
$q_text = str_ireplace("\$D", $D, $q_text);
$q_text = str_ireplace("\$E", $E, $q_text);
$q_text = str_ireplace("\$F", $F, $q_text);
$q_text = str_ireplace("\$G", $G, $q_text);
$q_text = str_ireplace("\$H", $H, $q_text);
//echo $q_text."<BR>";
$question->leadin = $q_text;
$headertext = $this->MakeQuestionHeader($question);
$title = StripForTitle($question->leadin);
$ob = new OB();
$ob->ClearAndSave();
include "qti20/tmpl/calculation.php";
$this->output .= $ob->GetContent();
$ob->Restore();
}
/**
* Render the question in the format required when taking the paper
* @param array $extra [description]
*/
public function generate_variables()
{
if (!isset($this->useranswer['vars']) or !is_array($this->useranswer['vars'])) {
// Create an empty array to hold the generated variables
$this->useranswer['vars'] = array();
}
// Check to see if variables have been previously generated if not put them in an array to be generated
foreach ($this->settings['vars'] as $key => $value) {
if ((!isset($this->useranswer['vars'][$key]) or $this->useranswer['vars'][$key] === 'ERROR') and !$this->is_linked_ans($value['min'])) {
$min = $this->variable_substitution($value['min'], $this->alluseranswers);
if ($value['max'] == '') {
//value for max not set force it to min to generate a fixed value.
$value['max'] = $value['min'];
}
$max = $this->variable_substitution($value['max'], $this->alluseranswers);
// Temporary fix ROGO-1468 until we introduce proper localisation we need to be able to handle ',' decimal places.
$inc = $this->variable_substitution(str_replace(',', '.', $value['inc']), $this->alluseranswers);
$dec = (int) $value['dec'];
$this->useranswer['vars'][$key] = MathsUtils::gen_random_no($min, $max, $inc, $dec);
}
// Pull in the last userans every time
if ($this->is_linked_ans($value['min'])) {
$this->useranswer['vars'][$key] = $this->variable_substitution($value['min'], $this->alluseranswers);
}
}
// Update the session
$_SESSION['qid'][$this->id]['vars'] = $this->useranswer['vars'];
}
