Terrain Modeling – Solid Element Operations & Complex Profiles

November 1, 2010 – ArchiCAD Video Tip by Eric Bobrow

In this 8 minute video tip, I show how to work with terrain models using Solid Element Operations (SEO) and Complex Profiles to simplify, speed up and improve your construction documentation.

In the first project, a stem wall and footing system is modeled with a complex profile, then carved out from the terrain slab using an SEO subtraction. A crawl space is created by subtracting out a special slab from the terrain. This extra slab is on a layer that is viewed in wire-frame while working, then hidden once the operation is complete. The footing is extended wider by redefining the complex profile, with the results instantly seen in the section drawing.

In a second file, the floor slab is used with an SEO “subtraction with upwards extrusion” to clear out the volume of the terrain mesh for the “slab on grade” and everything above (which includes the building shell and interior. A similar SEO is used to clear the space for the patio paving.

In the final example, a path is created by drawing a slab using the magic wand to automatically trace an undulating outline created by two splines. The slab initially extends above the prevailing grade, but is cut down to match the grade using the SEO “intersect” option. The terrain mesh passes through the path slab, so it is modified by an SEO subtraction, which quickly results in a clean model. The relationship between the mesh and slab is active, so when the path boundary is moved, it still looks correct. The polygon boundary is then extended to show how this approach can be used for “color coding” different areas of the terrain for paving, planting or other uses.

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Thanks for watching!

[…] mesh sites (Eric Bobrow did a video about this back in November–You can and should watch the video). I’ve used the trick a few times and it’s a huge time saver (I wish I knew about this […]

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