Graphics Programs Reference
In-Depth Information
if it is incorrect. With the Tape measure tool, click the two ends of a line
whose length you know. Put the real-life values in VCB and ENTER options.
Answer “yes” when you are asked “Do you want to resize the model.”
• Next,Iselectedthewholebasemap,turneditintoagroup,andrenamed
it suitably for later reference. Often CAD-imported files may have gaps
between lines that make it difficult to form shapes. So I locked the base
map and traced over this map, which helped to easily create shapes on a
different, unlocked layer.
• Ilineduptheresultinggroupwiththeaxistoensurenorthdirectionis
correct. Then I used the Rotate Q icon tool. This ensures the shadows
appear correct. In model options (drop-down menu Window>Model
Info), you can chose the geographical location of the site to ensure
shadow accuracy. You can specify the north orientation either by typing
the value or by choosing Select option to place it manually in your model.
You can display the north orientation by clicking on the checkbox titled
Show in the model.
• Sometimes,theCADimportwillbringinextralayers.Inormallygoto
layers and select all layers apart from Layer0, delete them, and choose the
button Move contents to default layer. Thus, all the imported geometry
is moved to the default layer. Next, I create a new layer named BASEPLAN
and then move the base map group via the entity information to this layer.
This is useful as a reference and, as mentioned earlier in this section, to
trace over.
Review
• ImportCADfile,andcheckoptions.
• Checksizeofimport.
• Grouptheplan.
• Lineuptheplanwithaxis - north point with rotate tool.
• Deleteextralayers,andplacegrouponnewlayer.
• Lockgroup,anduseforreference.
Stage 5: Building Initial Model
Goal : To lay down the basic foundations for model construction.
Input : Blocking in building footings.
Tools : Line tool.
I began the building of this model by first removing unnecessary lines from
the imported CAD file, basically cleaning my canvas and making it ready to
use. Then I blocked in the shapes of all building footings. By locking the base
map layer, I was able to trace on top of this map.
 
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