https://communities.bentley.com/communities/other_communities/chinafirst/f/microstation-projectwise/155969/ce-c-mesh我用MS自带工具画了一个圆，在转为mesh，然后用ms自带的求差工具求差，结果布尔运算失败。求问这是为什么呢，如下图：en-USTelligent Community 12https://communities.bentley.com/thread/466834?ContentTypeID=1Wed, 20 Jun 2018 10:49:46 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:ad0405b4-5554-49e5-853b-c64b64b4b531奋斗者<p>符老师，这个接口我试过两次，都没成功，不知道是不是我没用对。请问Mesh如何转成BsplineSurface呢？MS Mesh里有个工具叫convert to Surface是这么实现的？</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465979?ContentTypeID=1Thu, 14 Jun 2018 09:11:34 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:c8adac47-c4e5-46af-8aab-5c7ffb17eb0dYongan.Fu[quote userid="576695" url="~/communities/other_communities/chinafirst/f/microstation-projectwise/155969/ce-c-mesh/465576"]<span>mdlPop_elementDescrFromElementDescrBoolOp</span>和mdlPop_elementDescrFromElementDescrDifference都试过，都不能够成功返回NULL[/quote] <p>您测试过PolyfaceQuery::ComputeCutAndFill吗？</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465577?ContentTypeID=1Tue, 12 Jun 2018 01:57:41 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:e80d7fa6-9ec6-49ca-8f3c-b116e356e001奋斗者<p>好像可以把mesh转成DTM，但是要用CLR，而且看其他帖子说mesh转DTM接口没公开</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465576?ContentTypeID=1Tue, 12 Jun 2018 01:54:48 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:c2c98e03-daed-486f-9fb2-45ea4a55254f奋斗者<p><span>mdlPop_elementDescrFromElementDescrBoolOp</span>和mdlPop_elementDescrFromElementDescrDifference都试过，都不能够成功返回NULL</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465575?ContentTypeID=1Tue, 12 Jun 2018 01:53:08 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:2c458ea2-9e1e-4c14-b2d3-babd8be38b88zzghq<p>你用的哪个API？是mdlPop_elementDescrFromElementDescrBoolOp么？</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465462?ContentTypeID=1Mon, 11 Jun 2018 11:34:44 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:01f2fee5-99a6-470e-9783-4178a8a792e5奋斗者<p>符老师，我试了下还是不能成功，我感觉求差这个接口做mesh布尔运算并不是万能的，有些mesh并不能够成功，我试试其他跟稳妥的办法。</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465461?ContentTypeID=1Mon, 11 Jun 2018 11:29:16 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:1236b5e5-eb1a-45bc-85a2-9068ba28f12d奋斗者<p>是这样的，因为我只有一个点和一个方向向量，所以做的时候我只需用确定一个半径就可以绘制出一个圆，所以当时选的圆作为切割面，我试试正方形</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465443?ContentTypeID=1Mon, 11 Jun 2018 10:02:48 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:46a16101-b4c6-43c4-ab46-dcf447658181Yongan.Fu<p>既然是要用一个面来切割，是否可以创建一个更简单的正方形Mesh作为切割面？</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465327?ContentTypeID=1Mon, 11 Jun 2018 02:46:02 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:996fe920-3be1-43a5-b570-eb1813a5e756奋斗者<p>符老师，我想实现用一个mesh面去切割已有的mesh面，切割的tool是我自己创建的圆面转成mesh的。</p><div style="clear:both;"></div>https://communities.bentley.com/thread/465301?ContentTypeID=1Mon, 11 Jun 2018 01:01:25 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:75c2f173-cc8f-4ddd-acca-6d9ff56f0e9aYongan.Fu<p>两个Mesh体之间求差比较合理，您这个面想如何求差呢？是否是想实现对现有一个Mesh的切割？</p><div style="clear:both;"></div>