Flash MX 编程深层次应用-高级特效(3)
</script></div><font id="zoom"><DIV style="FONT-SIZE: 18px; COLOR: #990000; FONT-FAMILY: ; 宋体: " align=center>3.2 综合特效(1)</DIV><DIV style="PADDING-RIGHT: 10px; PADDING-LEFT: 10px; FONT-SIZE: 10.5pt; COLOR: black; LINE-HEIGHT: 180%" align=left><BR> <P class=MsoNormal><SPAN style="FONT-FAMILY: 幼圆"><FONT size=2>上面特效的代码比较深奥难懂，下面就讲两个相对简单一点的特效。第一个是麦克风的使用，这个特效由于没有相关帮助文档，所以要使用某些功能只能慢慢地尝试，这样让编程变得麻烦；第二个特效为血管特效，它是对画线函数的绝好应用，非常值得大家学习。</FONT></SPAN></P><H3><A name=_Toc23411471><SPAN lang=EN-US><FONT size=2>3.2.1 </FONT></SPAN></A><SPAN style="FONT-FAMILY: 方正隶书简体"><FONT size=2>麦克风的控制</FONT></SPAN></H3><P class=MsoNormal><FONT size=2><SPAN style="FONT-FAMILY: 幼圆">在</SPAN><SPAN lang=EN-US>Flash MX</SPAN><SPAN style="FONT-FAMILY: 幼圆">中已经可以支持麦克风了，但是不知何故，</SPAN><SPAN lang=EN-US>Macromedia</SPAN><SPAN style="FONT-FAMILY: 幼圆">没有公开这个功能的使用。在查找一些国外的文档资料之后，发现了一些与麦克风相关的函数及方法：</SPAN></FONT></P><H6><SPAN lang=EN-US><FONT size=2>micname.attachAudio(Microphone.get())</FONT></SPAN></H6><P class=MsoNormal><FONT size=2><SPAN style="FONT-FAMILY: 幼圆">创建一个动画片断来存储麦克风的一些参数与属性。这里的</SPAN><SPAN lang=EN-US>micname</SPAN><SPAN style="FONT-FAMILY: 幼圆">可以是任意名字，在后面的程序中并不会用到这个名字，它由系统自动控制。</SPAN></FONT></P><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>Microphone.get() </SPAN><SPAN style="FONT-FAMILY: 幼圆">取得麦克风的对象。</SPAN></FONT></H6><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>setUseEchoSuppression(n) </SPAN><SPAN style="FONT-FAMILY: 幼圆">消除麦克风的回声，</SPAN><SPAN lang=EN-US>n</SPAN><SPAN style="FONT-FAMILY: 幼圆">等于</SPAN><SPAN lang=EN-US>0</SPAN><SPAN style="FONT-FAMILY: 幼圆">时表示不消除，</SPAN><SPAN lang=EN-US>1 </SPAN><SPAN style="FONT-FAMILY: 幼圆">表示消除。</SPAN></FONT></H6><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>setRate(n) </SPAN><SPAN style="FONT-FAMILY: 幼圆">设定采样率，</SPAN><SPAN lang=EN-US>n</SPAN><SPAN style="FONT-FAMILY: 幼圆">的取值可以是</SPAN><SPAN lang=EN-US>5,8,11,22,44</SPAN><SPAN style="FONT-FAMILY: 幼圆">分别代表对应的</SPAN><SPAN lang=EN-US>kHz</SPAN><SPAN style="FONT-FAMILY: 幼圆">。</SPAN></FONT></H6><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>setSilenceLevel(n) </SPAN><SPAN style="FONT-FAMILY: 幼圆">用途不明，</SPAN><SPAN lang=EN-US>n</SPAN><SPAN style="FONT-FAMILY: 幼圆">取值从</SPAN><SPAN lang=EN-US>0</SPAN><SPAN style="FONT-FAMILY: 宋体">～</SPAN><SPAN lang=EN-US>100</SPAN><SPAN style="FONT-FAMILY: 幼圆">，默认值是</SPAN><SPAN lang=EN-US>10</SPAN><SPAN style="FONT-FAMILY: 幼圆">。</SPAN></FONT></H6><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>setGain(n) </SPAN><SPAN style="FONT-FAMILY: 幼圆">麦克风的增益。取值从</SPAN><SPAN lang=EN-US>0</SPAN><SPAN style="FONT-FAMILY: 宋体">～</SPAN><SPAN lang=EN-US>100</SPAN><SPAN style="FONT-FAMILY: 幼圆">。这个值越大，对声音的敏感度就越大，一点小小的声音可以放出很大的音量值。当这个值被设置之后，只要不退出程序，再次使用麦克风时，它就仍然使用上次的值，除非又重新对这个值进行了设置。它的默认值是</SPAN><SPAN lang=EN-US>50</SPAN><SPAN style="FONT-FAMILY: 幼圆">。</SPAN></FONT></H6><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>activityLevel() </SPAN><SPAN style="FONT-FAMILY: 幼圆">返回麦克风音量，取值从</SPAN><SPAN lang=EN-US>–1</SPAN><SPAN style="FONT-FAMILY: 宋体">～</SPAN><SPAN lang=EN-US>100 </SPAN><SPAN style="FONT-FAMILY: 幼圆">，本项内容属于只读，不能设置。</SPAN></FONT></H6><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>Microphone.names </SPAN><SPAN style="FONT-FAMILY: 幼圆">用来支持麦克风录音的设备名。</SPAN></FONT></H6><P class=MsoNormal><SPAN style="FONT-FAMILY: 幼圆"><FONT size=2>目前来说可以查到的关于麦克风的资料就是这些，现在来看一个具体实例的代码：</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>_root.createEmptyMovieClip("mic", 1);</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>_root.mic.attachAudio(Microphone.get());</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>_root.myMic = Microphone.get();</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>_root.myMic.setUseEchoSuppression(1);</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>_root.myMic.setGain(100)</FONT></SPAN></P><P class=a3><FONT size=2><SPAN lang=EN-US>//</SPAN><SPAN style="FONT-FAMILY: 幼圆">设置采样频率</SPAN></FONT></P><P class=a3><SPAN lang=EN-US><FONT size=2>_root.myMic.setRate(44);</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>this.onEnterFrame = function() {</FONT></SPAN></P><P class=a3><FONT size=2><SPAN lang=EN-US> //</SPAN><SPAN style="FONT-FAMILY: 幼圆">返回麦克风的音量从</SPAN><SPAN lang=EN-US>–1</SPAN><SPAN style="FONT-FAMILY: 幼圆">至</SPAN><SPAN lang=EN-US>100</SPAN></FONT></P><P class=a3><SPAN lang=EN-US><FONT size=2> level = _root.myMic.activityLevel;</FONT></SPAN></P><P class=a3><FONT size=2><SPAN lang=EN-US> //</SPAN><SPAN style="FONT-FAMILY: 幼圆">控制大小变化的速度</SPAN></FONT></P><P class=a3><SPAN lang=EN-US><FONT size=2> osci += ((level)+1)/1;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> if (osci>360) {</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> osci = 0;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> }</FONT></SPAN></P><P class=a3><FONT size=2><SPAN lang=EN-US> //</SPAN><SPAN style="FONT-FAMILY: 幼圆">控制周围的多边形与中心的那个之间的距离</SPAN></FONT></P><P class=a3><SPAN lang=EN-US><FONT size=2> ml = (0-level)/6;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> radius = Math.sin(osci*Math.PI/180)*(ml+100);</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> rotation += (level)/2+1;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> this.clear();</FONT></SPAN></P><P class=a3><FONT size=2><SPAN lang=EN-US> //</SPAN><SPAN style="FONT-FAMILY: 幼圆">多边形的边数</SPAN></FONT></P><P class=a3><SPAN lang=EN-US><FONT size=2> angle = 8;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> for (j=0; j<angle; j++) {</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> xradius = Math.cos((j*360/angle)*Math.PI/180)*ml*(radius/angle);</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> yradius = Math.sin((j*360/angle)*Math.PI/180)*ml*(radius/angle);</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> this.lineStyle(level/3, "0xffffff");</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> x = Math.cos((arcAngle+rotation)*Math.PI/180)*radius;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> y = Math.sin((arcAngle+rotation)*Math.PI/180)*radius;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> this.moveTo(x+250+(xradius), y+200+(yradius));</FONT></SPAN></P><P class=a3><FONT size=2><SPAN lang=EN-US> //</SPAN><SPAN style="FONT-FAMILY: 幼圆">画中心的等边形的边</SPAN></FONT></P><P class=a3><SPAN lang=EN-US><FONT size=2> for (i=1; i<angle+1; i++) {</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> x = Math.cos(((i*(360/angle))+rotation)*Math.PI/180)*radius;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> y = Math.sin(((i*(360/angle))+rotation)*Math.PI/180)*radius;</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> this.lineTo(x+250+(xradius), y+200+(yradius));</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> }</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> }</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>};</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>stop();</FONT></SPAN></P><P class=MsoNormal><SPAN lang=EN-US><FONT size=2></FONT></SPAN> </P><P class=MsoNormal><FONT size=2><SPAN style="FONT-FAMILY: 幼圆">这段代码是根据麦克风的声音画一组正多边形。图</SPAN><SPAN lang=EN-US>3-8</SPAN><SPAN style="FONT-FAMILY: 幼圆">是音量在接近</SPAN><SPAN lang=EN-US>100</SPAN><SPAN style="FONT-FAMILY: 幼圆">时的效果，图</SPAN><SPAN lang=EN-US>3-9</SPAN><SPAN style="FONT-FAMILY: 幼圆">是音量在接近</SPAN><SPAN lang=EN-US>50</SPAN><SPAN style="FONT-FAMILY: 幼圆">的效果。</SPAN></FONT></P><P class=a2 align=center><SPAN lang=EN-US><FONT size=2><IMG height=187 src="http://edu.chinaz.com/Files/BeyondPic/image008.jpg" width=201> <IMG height=187 src="http://edu.chinaz.com/Files/BeyondPic/image009.jpg" width=202></FONT></SPAN></P><P class=a0 align=center><FONT size=2><SPAN style="FONT-FAMILY: 宋体">图</SPAN><SPAN lang=EN-US>3-8 </SPAN><SPAN style="FONT-FAMILY: 宋体">图</SPAN><SPAN lang=EN-US>3-9</SPAN></FONT></P><P class=MsoNormal><SPAN style="FONT-FAMILY: 幼圆"><FONT size=2>值得注意的是，在执行代码的过程中取了以下变量的输出值，内容如下：</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>Variable _level0.$version = "WIN 6,0,4,0"</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>Variable _level0.myMic = [object #1, class 'Microphone'] {</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> index:[getter/setter] 0,</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> activityLevel:[getter/setter] 0,</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> name:[getter/setter] "C-Media Wave Device",</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> silenceLevel:[getter/setter] 10,</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> silenceTimeOut:[getter/setter] 2000,</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> rate:[getter/setter] 44,</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> gain:[getter/setter] 50,</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> useEchoSuppression:[getter/setter] 1,</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> muted:[getter/setter] false</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2> }</FONT></SPAN></P><P class=a3><SPAN lang=EN-US><FONT size=2>……</FONT></SPAN></P><P class=MsoNormal><SPAN style="FONT-FAMILY: 幼圆"><FONT size=2>从这里显示出来的属性可以看出，这个麦克风对象还有几个可控制或者可读取的属性：</FONT></SPAN></P><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>index</SPAN><SPAN style="FONT-FAMILY: 幼圆">：这个属性明显是一个数值，与麦克风句柄有关。</SPAN></FONT></H6><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>silenceTimeOut</SPAN><SPAN style="FONT-FAMILY: 幼圆">：这个属性与上面的</SPAN><SPAN lang=EN-US>silenceLevel</SPAN><SPAN style="FONT-FAMILY: 幼圆">属性一起控制麦克风。</SPAN></FONT></H6><H6><FONT size=2><SPAN lang=EN-US style="FONT-FAMILY: Symbol">Ö<SPAN style="FONT: 7pt 'Times New Roman'"> </SPAN></SPAN><SPAN lang=EN-US>muted</SPAN><SPAN style="FONT-FAMILY: 幼圆">：静音控制。这个明显是一个布尔变量值。为</SPAN><SPAN lang=EN-US>true</SPAN><SPAN style="FONT-FAMILY: 幼圆">时麦克风就无声音了。</SPAN></FONT></H6><P class=MsoNormal><SPAN style="FONT-FAMILY: 幼圆"><FONT size=2>当然了，由于没有文档，所以对这些参数的意义只能是估计与猜测了，可能会有不正确的地方，暂时也不知用什么函数及方法来控制或者取得这几项参数值，如果大家能找到关于这几项内容的文档，也请来信告知</FONT>。</SPAN></P></DIV></font>