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ARCHICAD’s Intelligent connections – Trimming body of roofs and shells


When performing the Trim to Roof or Shell
command, a so-called Trimming Body is used. The View… On-Screen View Options… Trimming
Bodies menu command toggles the display of Trimming Bodies. When displayed they are shown
as red transparent bodies. Roofs and Shells can have Trimming Bodies
since these can be Trimming element. When we are trimming an element to a Roof
or Shell, what we are actually specifying is whether the part of the element within
the Trimming Body should remain or its part outside of the Trimming Body. The Trimming
Body can be thought of as a SEO operator. If we click the lower part of the Wall, the
Trimming Body works as an Intersection SEO operator, the Wall works as Target… and
the result will be the intersection of the Wall and the Trimming Body of the Roof or
Shell. If we click the upper part of the Wall, the
Trimming Body and the physical body of the Roof or Shells together work as a Subtraction
SEO operator, the Wall works as Target… and the result will be the body of the Wall
minus the Trimming Body and the physical body of the Roof or Shells. So the essential difference between a SEO
operation and the Trim to Roof or Shell command is that in case of SEO, the physical body
of the element is used, while in the Trim to Roof or Shell command, the Trimming Body
of the Roof or Shell is used in the operation. If we Trim Roofs and Shells to each other
with the automatic method, what we can see is that those parts of these Roofs and Shells
will be removed that fall within the Trimming Bodies of other Roofs and Shell. This is the default way of operation. This
is important because the location and position of the Trimming Bodies of Roofs and Shells
can be changed in their Settings Dialogs. We will see more of this in other Intelligent
Connections Videos.

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