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	<title>点坐标 - 四号程序员</title>
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		<title>正多边形的点坐标公式</title>
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		<pubDate>Wed, 08 Feb 2017 04:45:22 +0000</pubDate>
				<category><![CDATA[计算机技术]]></category>
		<category><![CDATA[公式]]></category>
		<category><![CDATA[正五边形]]></category>
		<category><![CDATA[正六边形]]></category>
		<category><![CDATA[正多边形]]></category>
		<category><![CDATA[点坐标]]></category>
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					<description><![CDATA[传送门：How to draw a n sided regular polygon in cartesian coordinates? 先上公式，假设要画正N边型，外接圆的中心点坐标为（x_centre, y_centre) x[n] = r * cos(2*pi*n/N + theta) + x_centre y[n] = r * sin(2*pi*n/N + theta) + y_centre 这里如果theta取0，那么画出来是歪的。 想正的话，theta = pi[......] 继续阅读]]></description>
		
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