Polysurfaces (red); extrusion objects (blue).
Extrudes use a base curve or surface to make an open or closed shape. Extrusions can be polysurfaces or lightweight extrusion objects.
Polysurfaces (red); extrusion objects (blue).
Light-weight extrusion objects use only a profile curve and a length as input instead of the network of isocurves normally needed for NURBS objects. The Box, Cylinder, Tube, ExtrudeCrv, and ExtrudeSrf commands create extrusion objects. Extrusion objects can be closed with a planar cap or open. These objects will be converted to polysurfaces by some commands if necessary to add additional information for editing.
擠出物件與多重曲面比起來有占用較少的記憶體、網格轉換較快、儲存的檔案較小等優點。
In models containing large numbers of extrusions represented by traditional polysurfaces, performance can be sluggish due to the relatively high demand on resources. If the same objects are made in Rhino as lightweight extrusion objects, these models are more responsive and more memory is available.
The UseExtrusions command controls the use of lightweight extrusion objects. To make commands that normally create extrusions create traditional polysurfaces, select the Polysurface option.
相關的指令
Specifies whether extrusion objects or polysurfaces are used when extruding straight‑side objects.
The UseExtrusions command controls the use of extrusion objects.
| ● | When UseExtrusions is turned on, Rhino commands that create simple solids and surfaces will use extrusion objects when possible. |
| ● | When UseExtrusions is turned off, Rhino will use surface and polysurface objects. |
| ● | Turning off UseExtrusions does not change existing extrusion objects. |
將擠出物件轉換為曲面或多重曲面。
Select extrusion objects.
The SelExtrusion command will not select polysurface or surface objects. Use this command if you want to see which objects are extrusion objects.
Select extrusion objects.
從 NURBS 曲面或多重曲面建立網格物件。
The walls of extrusion objects are always meshed with quadrangles running the length of the extrusion. The caps are generally meshed with triangles.
以不同的檔案名稱儲存目前的模型，同時關閉目前的模型並開啟另存的模型。
Extrusion objects are converted to polysurfaces when saving as Rhino 4 or earlier.
將擠出物件轉換為曲面或多重曲面。
往一個方向擠出曲線。
將曲線沿著一條路徑擠出。
將曲線以設定的拔模角度擠出。
將曲線擠出至一點。
往一個方向擠出曲面。
沿著曲線擠出曲面。
以設定的拔模角度擠出曲面。
將曲面擠出至一點。
建立一個立方體。
建立一個圓柱體。
Create a surface, polysurface, or extrusion object with a circular profile around a curve.
將多重直線偏移，然後擠出並加蓋建立實體。
將封閉的平面曲線往與曲線平面垂直的方向擠出至邊界曲面，並與邊界曲面組合成多重曲面。
將曲面上的曲線往曲面的法線方向擠出。
Create a surface, polysurface, or extrusion object with a circular profile around a curve.
將曲線擠出成曲面，再往邊界物件擠出，並與邊界物件結合。
將曲線偏移，並在兩條曲線之間建立規則曲面。
將多重直線偏移，然後擠出並加蓋建立實體。
請參考
