Split and trim objects with other objects.
Surfaces can be trimmed or untrimmed. A trimmed surface has two parts: a surface that underlies everything and defines the geometric shape, and trimming curves that mark sections of the underlying surface that are trimmed away.
修剪過的曲面是由某些指令以曲線或曲面修剪或分割其它曲面建立的，但也有一些指令會直接建立修剪過的曲面。
The shape of a surface is still defined by a set of control points arranged in a rectangular pattern.
Since it can be important for you to know if a surface is trimmed, the Properties command lists the trimmed or untrimmed state of the surface. Some Rhino commands work only with untrimmed surfaces and some software does not import trimmed NURBS surfaces.
Trimming curves lie on the underlying surface. This surface may be larger than the trim curves, but you will not see the underlying surface because Rhino does not draw the part of the surface that is outside the trim curves. Every trimmed surface retains information about its underlying surface geometry. You can remove the trimming curve boundaries to make the surface untrimmed with the Untrim command.
如果您以一條跨越曲面的曲線修剪曲面，然後開啟該曲面的控制點，會發現曲面控制點的結構完全不受曲面修剪的影響。
如果您以一條封閉的曲線建立曲面，建立的可能是修剪過的曲面，例圖是從一個圓形曲線建立的曲面，四個控制點是它的原始曲面的四邊形結構。
The Untrim command removes the trimming curve from the surface to get back to the underlying untrimmed rectangular surface.
以一個物件分割另一個物件。
分割曲面邊緣。
分割多重曲面上的平面。
沿著銳邊將曲面分割。
將組合在一起的物件打散成為個別的物件。
以一個物件修剪另一個物件。
使用開放或封閉的曲線切割多重曲面就像是以高溫鐵絲切割保麗龍一樣。
取消修剪選取的曲面修剪邊緣。
移除曲面的修剪邊緣。
取消所有修剪邊緣。
取消曲面外圍的修剪邊緣。
取消曲面內部的修剪邊緣 (洞)。
以其它物件分割網格。
以一個物件修剪一個網格。
分割網格邊緣。
以網格上的曲線分割網格。
將邊緣未接觸但組合在一起的網格分割為個別網格。
請參考
