（4）获得准确的AcDb3dSolid的包围盒

XDSoft · 发表于 2014-12-5 20:41:14

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Calculating Tight Bounding Box Around A Solid

问题：
When I calculate the box of a solid, or any other AcDbEntity, this box is
aligned with the x,y,z axes. This box might be much larger than the smallest box
which could contain the solid.To take an extreme example, consider the cylinder
with radius 1, height 100, aligned with the vector 1,1,1. The box returned by
AutoCAD for this entity has the volume 2.092463E+005. The optimal box (not
aligned with the x,y,z axes) has the volume 400. How can I obtain this box?

解决方案：

An exact answer for this problem is not simple, but a good approximation is
possible. One can calculate the principal axes from the solid, and align the box
with these axes. This gives the perfect answer in this case, and will generally
produce a much better answer than doing nothing at all. The attached code shows
an approach where the user can select a solid, and then create a box that is the
calculated tight box around the solid.

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st788796 · 发表于 2014-12-5 21:28:58

呵呵，这个虽然是桌子后养的，后来也没让长大

st788796 · 发表于 2014-12-5 22:06:00

看了下还是autodesk自己的跟着别人有，拉人家下水

sanqima · 发表于 2014-12-17 20:15:12

看看，也不错。{:soso_e100:}

cxjzxf · 发表于 2015-1-17 20:00:49

好东西要学习下。

llq_78 · 发表于 2015-5-10 15:24:06

获得准确的AcDb3dSolid的包围盒

1425361224 · 发表于 2017-2-28 11:22:41

我也来学习学习是怎么回事

lionguns · 发表于 2017-3-1 22:35:38

啥也不说了，感谢楼主分享哇！

URD911 · 发表于 2017-3-19 08:32:15

收藏备用谢过

革天明 · 发表于 2017-3-27 10:09:03

谢谢楼主分享

a871352 · 发表于 2017-6-5 13:08:28

學習中..謝謝分享

xinxirong · 发表于 2017-6-5 23:30:33

jgggh小米手机:02083074480

leslie110 · 发表于 2017-6-16 14:56:36

好帖，要支持一下

zdarc · 发表于 2017-8-17 10:28:37

我来测试一下，行不行”

scnjlwb · 发表于 2018-5-15 22:11:13

多谢分享！

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[每日一码] （4）获得准确的AcDb3dSolid的包围盒

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