public function __construct($aData)
{
$this->iData = $aData;
$this->legend = new LegendStyle();
// Setup the scale
$this->scale = new Graph\WindrosePlotScale($this->iData);
// default label for free type i agle and a degree sign
$this->iLabelFormatString = '%.1f' . Graph\SymChar::Get('degree');
$delta = 2 * M_PI / 16;
for ($i = 0, $a = 0; $i < 16; ++$i, $a += $delta) {
$this->iStandardDirections[$this->iAllDirectionLabels[$i]] = $a;
}
}
public function StrokeAngleLabels($pos, $type)
{
if (!$this->show_angle_label) {
return;
}
$x0 = round($this->img->left_margin + $this->img->plotwidth / 2) + 1;
$d = max($this->img->plotwidth, $this->img->plotheight) * 1.42;
$a = $this->angle_step;
$t = new Text();
$t->SetColor($this->angle_fontcolor);
$t->SetFont($this->angle_fontfam, $this->angle_fontstyle, $this->angle_fontsize);
$xright = $this->img->width - $this->img->right_margin;
$ytop = $this->img->top_margin;
$xleft = $this->img->left_margin;
$ybottom = $this->img->height - $this->img->bottom_margin;
$ha = 'left';
$va = 'center';
$w = $this->img->plotwidth / 2;
$h = $this->img->plotheight / 2;
$xt = $x0;
$yt = $pos;
$margin = 5;
$tl = $this->angle_tick_len;
// Outer len
$tl2 = $this->angle_tick_len2;
// Interior len
$this->img->SetColor($this->angle_tick_color);
$rot90 = $this->img->a == 90;
if ($type == POLAR_360) {
// Corner angles of the four corners
$ca1 = atan($h / $w) / M_PI * 180;
$ca2 = 180 - $ca1;
$ca3 = $ca1 + 180;
$ca4 = 360 - $ca1;
$end = 360;
while ($a < $end) {
$ca = cos($a / 180 * M_PI);
$sa = sin($a / 180 * M_PI);
$x = $d * $ca;
$y = $d * $sa;
$xt = 1000;
$yt = 1000;
if ($a <= $ca1 || $a >= $ca4) {
$yt = $pos - $w * $y / $x;
$xt = $xright + $margin;
if ($rot90) {
$ha = 'center';
$va = 'top';
} else {
$ha = 'left';
$va = 'center';
}
$x1 = $xright - $tl2;
$x2 = $xright + $tl;
$y1 = $y2 = $yt;
} elseif ($a > $ca1 && $a < $ca2) {
$xt = $x0 + $h * $x / $y;
$yt = $ytop - $margin;
if ($rot90) {
$ha = 'left';
$va = 'center';
} else {
$ha = 'center';
$va = 'bottom';
}
$y1 = $ytop + $tl2;
$y2 = $ytop - $tl;
$x1 = $x2 = $xt;
} elseif ($a >= $ca2 && $a <= $ca3) {
$yt = $pos + $w * $y / $x;
$xt = $xleft - $margin;
if ($rot90) {
$ha = 'center';
$va = 'bottom';
} else {
$ha = 'right';
$va = 'center';
}
$x1 = $xleft + $tl2;
$x2 = $xleft - $tl;
$y1 = $y2 = $yt;
} else {
$xt = $x0 - $h * $x / $y;
$yt = $ybottom + $margin;
if ($rot90) {
$ha = 'right';
$va = 'center';
} else {
$ha = 'center';
$va = 'top';
}
$y1 = $ybottom - $tl2;
$y2 = $ybottom + $tl;
$x1 = $x2 = $xt;
}
if ($a != 0 && $a != 180) {
$t->Align($ha, $va);
if ($this->scale->clockwise) {
$t->Set(360 - $a);
} else {
$t->Set($a);
}
if ($this->show_angle_mark && $t->font_family > 4) {
$a .= SymChar::Get('degree');
}
$t->Stroke($this->img, $xt, $yt);
if ($this->show_angle_tick) {
$this->img->Line($x1, $y1, $x2, $y2);
}
}
$a += $this->angle_step;
}
} else {
// POLAR_HALF
$ca1 = atan($h / $w * 2) / M_PI * 180;
$ca2 = 180 - $ca1;
$end = 180;
while ($a < $end) {
$ca = cos($a / 180 * M_PI);
$sa = sin($a / 180 * M_PI);
$x = $d * $ca;
$y = $d * $sa;
if ($a <= $ca1) {
$yt = $pos - $w * $y / $x;
$xt = $xright + $margin;
if ($rot90) {
$ha = 'center';
$va = 'top';
} else {
$ha = 'left';
$va = 'center';
}
$x1 = $xright - $tl2;
$x2 = $xright + $tl;
$y1 = $y2 = $yt;
} elseif ($a > $ca1 && $a < $ca2) {
$xt = $x0 + 2 * $h * $x / $y;
$yt = $ytop - $margin;
if ($rot90) {
$ha = 'left';
$va = 'center';
} else {
$ha = 'center';
$va = 'bottom';
}
$y1 = $ytop + $tl2;
$y2 = $ytop - $tl;
$x1 = $x2 = $xt;
} elseif ($a >= $ca2) {
$yt = $pos + $w * $y / $x;
$xt = $xleft - $margin;
if ($rot90) {
$ha = 'center';
$va = 'bottom';
} else {
$ha = 'right';
$va = 'center';
}
$x1 = $xleft + $tl2;
$x2 = $xleft - $tl;
$y1 = $y2 = $yt;
}
$t->Align($ha, $va);
if ($this->show_angle_mark && $t->font_family > 4) {
$a .= SymChar::Get('degree');
}
$t->Set($a);
$t->Stroke($this->img, $xt, $yt);
if ($this->show_angle_tick) {
$this->img->Line($x1, $y1, $x2, $y2);
}
$a += $this->angle_step;
}
}
}