File

inc/pchart/pchart/class/pDraw.class.php, line 576

Class

pDraw

Code

function drawSpline($Coordinates, $Format = "") 
 {
  $R = isset($Format ["R"]) ? $Format ["R"] : 0;
  $G = isset($Format ["G"]) ? $Format ["G"] : 0;
  $B = isset($Format ["B"]) ? $Format ["B"] : 0;
  $Alpha = isset($Format ["Alpha"]) ? $Format ["Alpha"] : 100;
  $Force = isset($Format ["Force"]) ? $Format ["Force"] : 30;
  $Forces = isset($Format ["Forces"]) ? $Format ["Forces"] : NULL;
  $ShowC = isset($Format ["ShowControl"]) ? $Format ["ShowControl"] : FALSE;
  $Ticks = isset($Format ["Ticks"]) ? $Format ["Ticks"] : NULL;
  $PathOnly = isset($Format ["PathOnly"]) ? $Format ["PathOnly"] : FALSE;
  $Weight = isset($Format ["Weight"]) ? $Format ["Weight"] : NULL;

  $Cpt = NULL;
  $Mode = NULL;
  $Result = "";
  for ($i = 1; $i <= count($Coordinates) -1; $i++) 
   {
    $X1 = $Coordinates [$i -1][0];
    $Y1 = $Coordinates [$i -1][1];
    $X2 = $Coordinates [$i][0];
    $Y2 = $Coordinates [$i][1];

    if ($Forces != NULL) {
      $Force = $Forces [$i];
    }

    /* First segment */
    if ($i == 1) 
     {
      $Xv1 = $X1;
      $Yv1 = $Y1;
    }
    else 
     {
      $Angle1 = $this->getAngle($XLast, $YLast, $X1, $Y1);
      $Angle2 = $this->getAngle($X1, $Y1, $X2, $Y2);
      $XOff = cos($Angle2 * PI / 180) * $Force + $X1;
      $YOff = sin($Angle2 * PI / 180) * $Force + $Y1;

      $Xv1 = cos($Angle1 * PI / 180) * $Force + $XOff;
      $Yv1 = sin($Angle1 * PI / 180) * $Force + $YOff;
    }

    /* Last segment */
    if ($i == count($Coordinates) -1) 
     {
      $Xv2 = $X2;
      $Yv2 = $Y2;
    }
    else 
     {
      $Angle1 = $this->getAngle($X2, $Y2, $Coordinates [$i + 1][0], $Coordinates [$i + 1][1]);
      $Angle2 = $this->getAngle($X1, $Y1, $X2, $Y2);
      $XOff = cos(($Angle2 + 180) * PI / 180) * $Force + $X2;
      $YOff = sin(($Angle2 + 180) * PI / 180) * $Force + $Y2;

      $Xv2 = cos(($Angle1 + 180) * PI / 180) * $Force + $XOff;
      $Yv2 = sin(($Angle1 + 180) * PI / 180) * $Force + $YOff;
    }

    $Path = $this->drawBezier($X1, $Y1, $X2, $Y2, $Xv1, $Yv1, $Xv2, $Yv2, $Format);
    if ($PathOnly) {
      $Result [] = $Path;
    }

    $XLast = $X1;
    $YLast = $Y1;
  }

  return ($Result);
}