/**
* This function draw a filled cubic curve
*/
function drawFilledCubicCurve(pData $data, $Accuracy = 0.1, $Alpha = 100, $AroundZero = FALSE)
{
/* Validate the Data and DataDescription array */
$this->validateDataDescription("drawFilledCubicCurve", $data->getDataDescription());
$this->validateData("drawFilledCubicCurve", $data->getData());
$LayerWidth = $this->GArea_X2 - $this->GArea_X1;
$LayerHeight = $this->GArea_Y2 - $this->GArea_Y1;
$YZero = $LayerHeight - (0 - $this->VMin) * $this->DivisionRatio;
if ($YZero > $LayerHeight) {
$YZero = $LayerHeight;
}
$GraphID = 0;
foreach ($data->getDataDescription()->values as $ColName) {
$XIn = array();
$YIn = array();
$Yt = array();
$U = array();
$ColorID = $data->getDataDescription()->getColumnIndex($ColName);
$numElements = 1;
$XLast = -1;
$Missing = array();
$data->getXYMap($ColName, $XIn, $YIn, $Missing, $numElements);
$Yt[0] = 0;
$Yt[1] = 0;
$U[1] = 0;
$this->calculateCubicCurve($Yt, $XIn, $YIn, $U, $numElements);
$Yt[$numElements] = 0;
for ($k = $numElements - 1; $k >= 1; $k--) {
$Yt[$k] = $Yt[$k] * $Yt[$k + 1] + $U[$k];
}
$Points = "";
$Points[] = $this->GAreaXOffset + $this->GArea_X1;
$Points[] = $LayerHeight + $this->GArea_Y1;
$YLast = NULL;
$XPos = $this->GAreaXOffset;
$PointsCount = 2;
for ($X = 1; $X <= $numElements; $X = $X + $Accuracy) {
$klo = 1;
$khi = $numElements;
$k = $khi - $klo;
while ($k > 1) {
$k = $khi - $klo;
if ($XIn[$k] >= $X) {
$khi = $k;
} else {
$klo = $k;
}
}
$klo = $khi - 1;
$h = $XIn[$khi] - $XIn[$klo];
$a = ($XIn[$khi] - $X) / $h;
$b = ($X - $XIn[$klo]) / $h;
$Value = $a * $YIn[$klo] + $b * $YIn[$khi] + (($a * $a * $a - $a) * $Yt[$klo] + ($b * $b * $b - $b) * $Yt[$khi]) * ($h * $h) / 6;
$YPos = $LayerHeight - ($Value - $this->VMin) * $this->DivisionRatio;
if ($YLast != NULL && $AroundZero && !isset($Missing[floor($X)]) && !isset($Missing[floor($X + 1)])) {
$aPoints = "";
$aPoints[] = $XLast + $this->GArea_X1;
$aPoints[] = min($YLast + $this->GArea_Y1, $this->GArea_Y2);
$aPoints[] = $XPos + $this->GArea_X1;
$aPoints[] = min($YPos + $this->GArea_Y1, $this->GArea_Y2);
$aPoints[] = $XPos + $this->GArea_X1;
$aPoints[] = $YZero + $this->GArea_Y1;
$aPoints[] = $XLast + $this->GArea_X1;
$aPoints[] = $YZero + $this->GArea_Y1;
$this->canvas->drawFilledPolygon($aPoints, 4, $this->palette->getColor($ColorID), $alpha);
}
if (!isset($Missing[floor($X)]) || $YLast == NULL) {
$PointsCount++;
$Points[] = $XPos + $this->GArea_X1;
$Points[] = min($YPos + $this->GArea_Y1, $this->GArea_Y2);
} else {
$PointsCount++;
$Points[] = $XLast + $this->GArea_X1;
$Points[] = min($LayerHeight + $this->GArea_Y1, $this->GArea_Y2);
}
$YLast = $YPos;
$XLast = $XPos;
$XPos = $XPos + $this->DivisionWidth * $Accuracy;
}
// Add potentialy missing values
$XPos = $XPos - $this->DivisionWidth * $Accuracy;
if ($XPos < $LayerWidth - $this->GAreaXOffset) {
$YPos = $LayerHeight - ($YIn[$numElements] - $this->VMin) * $this->DivisionRatio;
if ($YLast != NULL && $AroundZero) {
$aPoints = "";
$aPoints[] = $XLast + $this->GArea_X1;
$aPoints[] = max($YLast + $this->GArea_Y1, $this->GArea_Y1);
$aPoints[] = $LayerWidth - $this->GAreaXOffset + $this->GArea_X1;
$aPoints[] = max($YPos + $this->GArea_Y1, $this->GArea_Y1);
$aPoints[] = $LayerWidth - $this->GAreaXOffset + $this->GArea_X1;
$aPoints[] = max($YZero + $this->GArea_Y1, $this->GArea_Y1);
$aPoints[] = $XLast + $this->GArea_X1;
$aPoints[] = max($YZero + $this->GArea_Y1, $this->GArea_Y1);
$this->canvas->drawFilledPolygon($aPoints, 4, $this->palette->getColor($ColorID), $alpha);
}
if ($YIn[$klo] != "" && $YIn[$khi] != "" || $YLast == NULL) {
$PointsCount++;
$Points[] = $LayerWidth - $this->GAreaXOffset + $this->GArea_X1;
$Points[] = $YPos + $this->GArea_Y1;
}
}
$Points[] = $LayerWidth - $this->GAreaXOffset + $this->GArea_X1;
$Points[] = $LayerHeight + $this->GArea_Y1;
if (!$AroundZero) {
$this->canvas->drawFilledPolygon($Points, $PointsCount, $this->palette->getColor($ColorID), $Alpha);
}
$this->drawCubicCurve($data, $Accuracy, $ColName);
$GraphID++;
}
}
/**
* Check that if our data set contains non-numeric data, it will
* add they keys to the $missing array
*/
public function testGetXYMapMissing()
{
$data = new pData();
$data->addPoints(array(2, 3, 4, 'apple', 5, 'banana'), 'series1');
$data->addPoints(array(3, 4, 5, 6, 7), 'series2');
$xIn = array();
$yIn = array();
$missing = array();
$data->getXYMap('series1', $xIn, $yIn, $missing, $index);
$this->assertEquals(6, $index);
$this->assertEquals(array(4 => true, 6 => true), $missing);
}
