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# SWFDisplayItem->rotateTo

(no version information, might be only in CVS)

SWFDisplayItem->rotateTo -- Rotates the object in global coordinates.

## Description

void swfdisplayitem->rotateto ( float degrees)

Warning
This function is EXPERIMENTAL. The behaviour of this function, the name of this function, and anything else documented about this function may change without notice in a future release of PHP. Use this function at your own risk.

swfdisplayitem->rotateto() set the current object rotation to `degrees` degrees in global coordinates.

The object may be a swfshape(), a swfbutton(), a swftext() or a swfsprite() object. It must have been added using the swfmovie->add().

This example bring three rotating string from the background to the foreground. Pretty nice.

Example 1. swfdisplayitem->rotateto() example

    <?php
      $thetext =  "ming!";

      $f = new SWFFont("Bauhaus 93.fdb");

      $m = new SWFMovie();
      $m->setRate(24.0);
      $m->setDimension(2400, 1600);
      $m->setBackground(0xff, 0xff, 0xff);

      // functions with huge numbers of arbitrary
      // arguments are always a good idea!  Really!

      function text($r, $g, $b, $a, $rot, $x, $y, $scale, $string)
      {
        global $f, $m;

        $t = new SWFText();
        $t->setFont($f);
        $t->setColor($r, $g, $b, $a);
        $t->setHeight(960);
        $t->moveTo(-($f->getWidth($string))/2, $f->getAscent()/2);
        $t->addString($string);

        // we can add properties just like a normal php var,
        // as long as the names aren't already used.
        // e.g., we can't set $i->scale, because that's a function

        $i = $m->add($t);
        $i->x = $x;
        $i->y = $y;
        $i->rot = $rot;
        $i->s = $scale;
        $i->rotateTo($rot);
        $i->scale($scale, $scale);

        // but the changes are local to the function, so we have to
        // return the changed object.  kinda weird..

        return $i;
     }

      function step($i)
      {
        $oldrot = $i->rot;
        $i->rot = 19*$i->rot/20;
        $i->x = (19*$i->x + 1200)/20;
        $i->y = (19*$i->y + 800)/20;
        $i->s = (19*$i->s + 1.0)/20;

        $i->rotateTo($i->rot);
        $i->scaleTo($i->s, $i->s);
        $i->moveTo($i->x, $i->y);

        return $i;
      }

      // see?  it sure paid off in legibility:

      $i1 = text(0xff, 0x33, 0x33, 0xff, 900, 1200, 800, 0.03, $thetext);
      $i2 = text(0x00, 0x33, 0xff, 0x7f, -560, 1200, 800, 0.04, $thetext);
      $i3 = text(0xff, 0xff, 0xff, 0x9f, 180, 1200, 800, 0.001, $thetext);

      for($i=1; $i<=100; ++$i)
      {
        $i1 = step($i1);
        $i2 = step($i2);
        $i3 = step($i3);

        $m->nextFrame();
      }

      header('Content-type: application/x-shockwave-flash');
      $m->output();
    ?>

See also swfdisplayitem->rotate().

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