讨论一下弯曲，做做这个练习。

游子冬冬

一个如下的尺寸平面，沿着图中线A和线B的方向分别弯曲，弯曲的内半径为R10，做完之后，查一查曲面边沿的长度100是否变了

<img src="attachments/dvbbs/2004-3/200432314195258218.bmp" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/200432314195258218.bmp\');}" onmousewheel="return imgzoom(this);" alt="" />

[此贴子已经被作者于2004-3-23 14:26:02编辑过]

游子冬冬

线A弯曲时候曲面的样子，再次说明我的意思，呵呵。直线部分长：34。292，曲

线长：31.416。弯曲半径是R10，两个平面是平行的。

沿着线B的做法我就不会了。。。。


<img src="attachments/dvbbs/2004-3/20043231433751955.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/20043231433751955.gif\');}" onmousewheel="return imgzoom(this);" alt="" />

[此贴子已经被作者于2004-3-23 14:34:31编辑过]

haubest

如何弯曲的？我怎么没有发现有这项功能？前几天看到风筝就感到奇怪，不知怎么弯曲的，请赐教。

zjghlq

怎么做的呀？如果要我做我只会用实体生成！不知楼怎么做的。

游子冬冬

以下是引用haubest在2004-3-24 6:32:58的发言：
如何弯曲的？我怎么没有发现有这项功能？前几天看到风筝就感到奇怪，不知怎么弯曲的，请赐教。

赐教不敢呀。。。
我上面的图是用拉伸生成的曲面，尺寸是两维画好的。
至于风车的弯曲，我近日应朋友之约详细的说明做法，但是发现做法改变了风车的边沿的长度，也就是说：我那个风车是“貌像而神不是”。
近日一直考虑如何弯曲并且使周边的长度不变，所以发这个贴了，呵呵，
但愿能有更多的朋友探讨这个问题。
最好办法是：亲自做一个风车，看看曲线的实际变化。

游子冬冬

以下是引用zjghlq在2004-3-24 11:51:40的发言：
怎么做的呀？如果要我做我只会用实体生成！不知楼怎么做的。

有劳你用实体生成一个沿着70度方向的曲面了，并且满足我所说的条件了。期待中。。。。。。

zjghlq

<img src="attachments/dvbbs/2004-3/200432415145538993.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/200432415145538993.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

zjghlq

<img src="attachments/dvbbs/2004-3/200432415174191509.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/200432415174191509.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

zjghlq

<img src="attachments/dvbbs/2004-3/200432415192689834.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/200432415192689834.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

zjghlq

<img src="attachments/dvbbs/2004-3/20043241521172185.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/20043241521172185.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

zjghlq

长度经过修整后是100 ， 但宽度方向变长了，20.04几了。不知谁还有更好的办法做这个题。

游子冬冬

以下是引用zjghlq在2004-3-24 15:24:13的发言：
长度经过修整后是100 ， 但宽度方向变长了，20.04几了。不知谁还有更好的办法做这个题。

你的几个图我看了，呵呵，你要注意：弯曲的半径选择R10，两端平面要平行，这样能看清楚呀，我我我没有办法对比呀。

zjghlq

我把这个文件上传上来了，你下载解压缩后用实体设计看把。

游子冬冬

好的。马上看

游子冬冬

探讨：
已经看了您的图了，但是对于图中的弯曲部分的过渡，感觉好像是过渡的不对，您看看弯曲部分的宽度是多少？同时，您是如何画的？能说说吗？

<img src="attachments/dvbbs/2004-3/20043241843228320.bmp" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/20043241843228320.bmp\');}" onmousewheel="return imgzoom(this);" alt="" />

[此贴子已经被作者于2004-3-24 18:04:35编辑过]

游子冬冬

为了方便视觉，将长度改为200。试试

xp00

以下是引用zjghlq在2004-3-24 15:15:25的发言：

最好来个附图说明！

游子冬冬

对于单边曲线长度：65.399。我一直持怀疑的态度，不过我作出也是这个尺寸。还没有办法证明这个不对。
<img src="attachments/dvbbs/2004-3/20043250193986941.gif" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/20043250193986941.gif\');}" onmousewheel="return imgzoom(this);" alt="" />

[此贴子已经被作者于2004-3-25 0:20:57编辑过]

zjghlq

以下是我做的过程
<img src="attachments/dvbbs/2004-3/20043259124479262.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/20043259124479262.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />

zjghlq

<img src="attachments/dvbbs/2004-3/20043259135575840.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/20043259135575840.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
<img src="attachments/dvbbs/2004-3/20043259141315679.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2004-3/20043259141315679.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />