grassdds 发表于 2006-6-12 16:06:00

急急求助~~ 还望各位大侠们多多指导~~

<P>我画了一个圆弧</P>
<P>想更改它的起始端点与中止端点</P>
<P>查找圆弧的属性时，表明它的起始端点与中止端点分别为StartPoint&nbsp; 与EndPoint，而且是可编辑的</P>
<P>可是 为什么我一对它赋值，他就出现错误</P>
<P>而且这种错误也只在我要给点赋值时才出现，像&nbsp; 我对它的圆心赋值也出现错误，但是我对&nbsp; 它的起始角度赋值时就没错</P>
<P>求助~~~~&nbsp;&nbsp; 我要怎样对一个点赋值呢？？？</P>

songzhi 发表于 2006-6-12 21:34:00

<P class=1-liner>Specifies the start point for the arc, line, or ellipse.</P>
<P class=h1-access><A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/startpoint_see_also.htm" target="_blank" >See Also</A> | <A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/ex_startpoint.htm" target="_blank" >Example</A></P>
<P class=Heading-2>Signature
<P class=syntax>object.StartPoint
<P class=element>object</P>
<P class=element-desc><A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/idh_arc_object.htm" target="_blank" >Arc</A>, <A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/idh_ellipse_object.htm" target="_blank" >Ellipse</A>, <A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/idh_line_object.htm" target="_blank" >Line</A><BR>The object or objects this property applies to.
<P class=element>StartPoint</P>
<P class=element-desc>Variant (three-element array of doubles); <BR><STRONG><U>For the Arc and Ellipse objects this property is read-only.<BR></U></STRONG>For the Line object this property is read-write.<BR>The 3D WCS coordinate representing the start point for the object.
<P class=Heading-2>Remarks
<P class=body>
<P class=body><I>The start point for an arc, ellipse, and line
<P class=body>You cannot change the start point of an arc or ellipse. To edit an arc, use the <A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/idh_endangle.htm" target="_blank" >EndAngle</A> and <A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/idh_radius.htm" target="_blank" >Radius</A> properties. To edit an ellipse, use the EndAngle, <A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/idh_majoraxis.htm" target="_blank" >MajorAxis</A>, and <A href="mk:@MSITStore:D:\Program%20Files\AutoCAD%202004\help\acadauto.chm::/idh_radiusratio.htm" target="_blank" >RadiusRatio</A> properties. </P>
<P class=body>所以说是可编辑的是错误的</P>

Ea 发表于 2006-6-12 22:41:00

把点转换为对应的角度-〉修改角度
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