How to draw a 3D polygon with Allplan

[Tips&Tricks]

This tip shows you how simple it is to draw a 3D polygon with Allplan. With a 3D polygon, you can model complex 3D volumes such as double curved roofs or railings of a spiral staircase.

Step 1. Start drawing the top view of the 3D polygon in 2D, for this the default 2D functions are available: line, circle, polygon, clothoid, ...

Step 2. Divide this 2D polygon in different elements with the function Divide element, which you can find in the module Site plan.

Step 3. With the function Measure (Ctrl+Alt+M) you ask the length of the element of the 2D polygon.

Step 4. With the help of this length, you can draw the slope profile.

Step 5. With the function Change height of the symbol point from the module Site plan you have the possibility to change the height of the points according to the slope profile.



Step 6. To put these 3D points into a 3D polygon, you first have to export the 3D points with the function File interface from the module Overview.

Step 7. To read these 3D coordinates as a 3D polygon, you use the function File interface from the module Digital terrain model, with the settings shown on the picture.



The result is a 3D polygon. It is possible to use this 3D polygon as a course for a polyline sweep solid.

[izoelfirman]

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