Description

void swfdisplayitem->rotateto ( float degrees )

警告

本函数是实验性的。本函数的行为，包括函数名称以及其它任何关于本函数的文档可能会在没有通知的情况下随 PHP 以后的发布而改变。使用本函数风险自担。

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.

例子 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();
?>

ITEEDU

SWFDisplayItem->rotateTo

Description