Dynamo-based point cloud BIM automatic modeling method

Abstract

The invention discloses a Dynamo-based point cloud BIM automatic modeling method. The Dynamo-based point cloud BIM automatic modeling method comprises the following steps of S1, solving an extreme value of a point cloud three-dimensional degree, calculating a surface area of a point cloud bounding box, and calculating a point cloud average surface density according to the number of point clouds; S2, slicing the point cloud in a selected direction, setting the number of slices as an input type parameter, and calculating a point set in a previous threshold range and a next threshold range of a tangent plane; and S3, projecting the upper and lower point sets to a tangent plane for intersection, and fitting discrete points to obtain a cut boundary contour. In the Dynamo-based point cloud BIM automatic modeling method, a built-in visual programming platform (Dynamo) of the revit is fully utilized as a baton to perform layered editing and segmented modeling on the point cloud imported into the revit, so that the point cloud can automatically construct an entity model without transition and is endowed with attributes.

Description

technical field [0001] The invention belongs to the technical field of architectural modeling, and in particular relates to a Dynamo-based point cloud BIM automatic modeling method. Background technique [0002] Point cloud data is high-precision, high-density, fully digital target representation data obtained through 3D laser scanner or machine vision technology. Relying on the reverse modeling software, these spatial discrete points can also be processed into a three-dimensional grid model, which has been maturely used in basic surveying and mapping, and ancient building protection projects. [0003] BIM technology takes the three-dimensional building information model as the core, and realizes the whole life cycle management of the building through the analysis, transmission, sharing and application of the model, which is the basis for the development of construction industry informatization. Revit, the core modeling software of BIM, has a point cloud link function, but ...

AI Technical Summary

Problems solved by technology

[0009] It is worth noting that the first two types are currently used more methods, but there are a lot of manual work, which has certain interference to the model accuracy

The third type has a narrow application area and is suitable for MEP modeling

The fourth category is to directly edit and model the point cloud, with less human interference but high programming requirements, and the model constructed by it cannot be edited again in Revit

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