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function pDraw::drawPolygonChart in Visitors 7

Same name and namespace in other branches
  1. 7.2 pChart/class/pDraw.class.php \pDraw::drawPolygonChart()
3 calls to pDraw::drawPolygonChart()
pDraw::drawAreaChart in pChart/class/pDraw.class.php
pDraw::drawFilledSplineChart in pChart/class/pDraw.class.php
pDraw::drawZoneChart in pChart/class/pDraw.class.php

File

pChart/class/pDraw.class.php, line 6022

Class

pDraw

Code

function drawPolygonChart($Points, $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;
  $NoFill = isset($Format["NoFill"]) ? $Format["NoFill"] : FALSE;
  $NoBorder = isset($Format["NoBorder"]) ? $Format["NoBorder"] : FALSE;
  $BorderR = isset($Format["BorderR"]) ? $Format["BorderR"] : $R;
  $BorderG = isset($Format["BorderG"]) ? $Format["BorderG"] : $G;
  $BorderB = isset($Format["BorderB"]) ? $Format["BorderB"] : $B;
  $BorderAlpha = isset($Format["BorderAlpha"]) ? $Format["BorderAlpha"] : $Alpha / 2;
  $Surrounding = isset($Format["Surrounding"]) ? $Format["Surrounding"] : NULL;
  $Threshold = isset($Format["Threshold"]) ? $Format["Threshold"] : NULL;
  if ($Surrounding != NULL) {
    $BorderR = $R + $Surrounding;
    $BorderG = $G + $Surrounding;
    $BorderB = $B + $Surrounding;
  }
  $RestoreShadow = $this->Shadow;
  $this->Shadow = FALSE;
  $AllIntegers = TRUE;
  for ($i = 0; $i <= count($Points) - 2; $i = $i + 2) {
    if ($this
      ->getFirstDecimal($Points[$i + 1]) != 0) {
      $AllIntegers = FALSE;
    }
  }

  /* Convert polygon to segments */
  $Segments = "";
  for ($i = 2; $i <= count($Points) - 2; $i = $i + 2) {
    $Segments[] = array(
      "X1" => $Points[$i - 2],
      "Y1" => $Points[$i - 1],
      "X2" => $Points[$i],
      "Y2" => $Points[$i + 1],
    );
  }
  $Segments[] = array(
    "X1" => $Points[$i - 2],
    "Y1" => $Points[$i - 1],
    "X2" => $Points[0],
    "Y2" => $Points[1],
  );

  /* Simplify straight lines */
  $Result = "";
  $inHorizon = FALSE;
  $LastX = VOID;
  foreach ($Segments as $Key => $Pos) {
    if ($Pos["Y1"] != $Pos["Y2"]) {
      if ($inHorizon) {
        $inHorizon = FALSE;
        $Result[] = array(
          "X1" => $LastX,
          "Y1" => $Pos["Y1"],
          "X2" => $Pos["X1"],
          "Y2" => $Pos["Y1"],
        );
      }
      $Result[] = array(
        "X1" => $Pos["X1"],
        "Y1" => $Pos["Y1"],
        "X2" => $Pos["X2"],
        "Y2" => $Pos["Y2"],
      );
    }
    else {
      if (!$inHorizon) {
        $inHorizon = TRUE;
        $LastX = $Pos["X1"];
      }
    }
  }
  $Segments = $Result;

  /* Do we have something to draw */
  if ($Segments == "") {
    return 0;
  }

  /* For segments debugging purpose */

  //foreach($Segments as $Key => $Pos)

  // echo $Pos["X1"].",".$Pos["Y1"].",".$Pos["X2"].",".$Pos["Y2"]."\r\n";

  /* Find out the min & max Y boundaries */
  $MinY = OUT_OF_SIGHT;
  $MaxY = OUT_OF_SIGHT;
  foreach ($Segments as $Key => $Coords) {
    if ($MinY == OUT_OF_SIGHT || $MinY > min($Coords["Y1"], $Coords["Y2"])) {
      $MinY = min($Coords["Y1"], $Coords["Y2"]);
    }
    if ($MaxY == OUT_OF_SIGHT || $MaxY < max($Coords["Y1"], $Coords["Y2"])) {
      $MaxY = max($Coords["Y1"], $Coords["Y2"]);
    }
  }
  if ($AllIntegers) {
    $YStep = 1;
  }
  else {
    $YStep = 0.5;
  }
  $MinY = floor($MinY);
  $MaxY = floor($MaxY);

  /* Scan each Y lines */
  $DefaultColor = $this
    ->allocateColor($this->Picture, $R, $G, $B, $Alpha);
  $DebugLine = 0;
  $DebugColor = $this
    ->allocateColor($this->Picture, 255, 0, 0, 100);
  $MinY = floor($MinY);
  $MaxY = floor($MaxY);
  $YStep = 1;
  if (!$NoFill) {

    //if ( $DebugLine ) { $MinY = $DebugLine; $MaxY = $DebugLine; }
    for ($Y = $MinY; $Y <= $MaxY; $Y = $Y + $YStep) {
      $Intersections = "";
      $LastSlope = NULL;
      $RestoreLast = "-";
      foreach ($Segments as $Key => $Coords) {
        $X1 = $Coords["X1"];
        $X2 = $Coords["X2"];
        $Y1 = $Coords["Y1"];
        $Y2 = $Coords["Y2"];
        if (min($Y1, $Y2) <= $Y && max($Y1, $Y2) >= $Y) {
          if ($Y1 == $Y2) {
            $X = $X1;
          }
          else {
            $X = $X1 + (($Y - $Y1) * $X2 - ($Y - $Y1) * $X1) / ($Y2 - $Y1);
          }
          $X = floor($X);
          if ($X2 == $X1) {
            $Slope = "!";
          }
          else {
            $SlopeC = ($Y2 - $Y1) / ($X2 - $X1);
            if ($SlopeC == 0) {
              $Slope = "=";
            }
            elseif ($SlopeC > 0) {
              $Slope = "+";
            }
            elseif ($SlopeC < 0) {
              $Slope = "-";
            }
          }
          if (!is_array($Intersections)) {
            $Intersections[] = $X;
          }
          elseif (!in_array($X, $Intersections)) {
            $Intersections[] = $X;
          }
          elseif (in_array($X, $Intersections)) {
            if ($Y == $DebugLine) {
              echo $Slope . "/" . $LastSlope . "(" . $X . ") ";
            }
            if ($Slope == "=" && $LastSlope == "-") {
              $Intersections[] = $X;
            }
            if ($Slope != $LastSlope && $LastSlope != "!" && $LastSlope != "=") {
              $Intersections[] = $X;
            }
            if ($Slope != $LastSlope && $LastSlope == "!" && $Slope == "+") {
              $Intersections[] = $X;
            }
          }
          if (is_array($Intersections) && in_array($X, $Intersections) && $LastSlope == "=" && $Slope == "-") {
            $Intersections[] = $X;
          }
          $LastSlope = $Slope;
        }
      }
      if ($RestoreLast != "-") {
        $Intersections[] = $RestoreLast;
        echo "@" . $Y . "\r\n";
      }
      if (is_array($Intersections)) {
        sort($Intersections);
        if ($Y == $DebugLine) {
          print_r($Intersections);
        }

        /* Remove NULL plots */
        $Result = "";
        for ($i = 0; $i <= count($Intersections) - 1; $i = $i + 2) {
          if (isset($Intersections[$i + 1])) {
            if ($Intersections[$i] != $Intersections[$i + 1]) {
              $Result[] = $Intersections[$i];
              $Result[] = $Intersections[$i + 1];
            }
          }
        }
        if (is_array($Result)) {
          $Intersections = $Result;
          $LastX = OUT_OF_SIGHT;
          foreach ($Intersections as $Key => $X) {
            if ($LastX == OUT_OF_SIGHT) {
              $LastX = $X;
            }
            elseif ($LastX != OUT_OF_SIGHT) {
              if ($this
                ->getFirstDecimal($LastX) > 1) {
                $LastX++;
              }
              $Color = $DefaultColor;
              if ($Threshold != NULL) {
                foreach ($Threshold as $Key => $Parameters) {
                  if ($Y <= $Parameters["MinX"] && $Y >= $Parameters["MaxX"]) {
                    if (isset($Parameters["R"])) {
                      $R = $Parameters["R"];
                    }
                    else {
                      $R = 0;
                    }
                    if (isset($Parameters["G"])) {
                      $G = $Parameters["G"];
                    }
                    else {
                      $G = 0;
                    }
                    if (isset($Parameters["B"])) {
                      $B = $Parameters["B"];
                    }
                    else {
                      $B = 0;
                    }
                    if (isset($Parameters["Alpha"])) {
                      $Alpha = $Parameters["Alpha"];
                    }
                    else {
                      $Alpha = 100;
                    }
                    $Color = $this
                      ->allocateColor($this->Picture, $R, $G, $B, $Alpha);
                  }
                }
              }
              imageline($this->Picture, $LastX, $Y, $X, $Y, $Color);
              if ($Y == $DebugLine) {
                imageline($this->Picture, $LastX, $Y, $X, $Y, $DebugColor);
              }
              $LastX = OUT_OF_SIGHT;
            }
          }
        }
      }
    }
  }

  /* Draw the polygon border, if required */
  if (!$NoBorder) {
    foreach ($Segments as $Key => $Coords) {
      $this
        ->drawLine($Coords["X1"], $Coords["Y1"], $Coords["X2"], $Coords["Y2"], array(
        "R" => $BorderR,
        "G" => $BorderG,
        "B" => $BorderB,
        "Alpha" => $BorderAlpha,
        "Threshold" => $Threshold,
      ));
    }
  }
  $this->Shadow = $RestoreShadow;
}