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	<title>Lab of Chowky &#187; compass</title>
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		<title>[Flash] 指南針</title>
		<link>http://lab.chowky.com/2009/09/flash-%e6%8c%87%e5%8d%97%e9%87%9d/?utm_source=rss&#038;utm_medium=rss&#038;utm_campaign=flash-%25e6%258c%2587%25e5%258d%2597%25e9%2587%259d</link>
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		<pubDate>Tue, 15 Sep 2009 10:05:27 +0000</pubDate>
		<dc:creator>Chowky</dc:creator>
				<category><![CDATA[Flash]]></category>
		<category><![CDATA[Opensource]]></category>
		<category><![CDATA[RIA]]></category>
		<category><![CDATA[compass]]></category>
		<category><![CDATA[component]]></category>

		<guid isPermaLink="false">http://lab.chowky.com/?p=1354</guid>
		<description><![CDATA[一個用flash 開發的指南針。 當你drag 指南針的時候，指針就會自動指向北。 這個effect 方面是利用actionscript 3 的tweening class. Chowky 個人比較喜歡 tweenmax 的library。因為只要一句actionscript 就可以做到很不的animation。 (這個post 都比較數學呢~~，要atan&#8230;&#8230; 要這樣計角度來做，原來真的不簡單呢~) 
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</object> Source: http://www.flashandmath.com/howtos/compass/]]></description>
			<content:encoded><![CDATA[<p>一個用flash 開發的指南針。</p>
<p>當你drag 指南針的時候，指針就會自動指向北。</p>
<p>這個effect 方面是利用actionscript 3 的tweening class.</p>
<p>Chowky 個人比較喜歡 tweenmax 的library。因為只要一句actionscript 就可以做到很不的animation。</p>
<p>(這個post 都比較數學呢~~，要atan&#8230;&#8230; 要這樣計角度來做，原來真的不簡單呢~)</p>

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<p><a href="http://adobe.com/go/getflashplayer"><img src="http://www.adobe.com/images/shared/download_buttons/get_flash_player.gif" alt="Get Adobe Flash player" /></a></p>

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<p>Source: <a href="http://www.flashandmath.com/howtos/compass/">http://www.flashandmath.com/howtos/compass/</a></p>
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