How to Import Road Alignment Spatial Curves from CAD into Revit

In CAD, road alignment spatial curves are commonly represented using polylines, especially for the transition curves within roads. However, these should ideally be modeled as NURBS spline curves.

Here, we address the challenge of representing spatial curves in Revit by utilizing polylines.

Revit’s API requires that curves lie on a single plane. To meet this constraint, the polyline must be segmented into straight line segments, each lying on its own plane. By doing so, these segments collectively form a spatial curve.

Note: Due to slow internet speed, I am unable to upload images at the moment. I will resolve this later. For now, this explanation outlines the core concept.

xuebim

Follow the latest BIM developments in the architecture industry, explore innovative building technologies, and discover cutting-edge industry insights.

← Scan with WeChat