SWFDisplayItem- rotateTo

(no version information, might be only in CVS)

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

Description

void swfdisplayitem- rotateto ( float degrees)

警告

這個函數是 實驗性質的。這個函數的行為、名稱、 和關於此函數的任何其他文件 在未來PHP的發行中可能會在不通知的情況下改變。 使用此延伸需自行承擔風險。

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.

範例 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().