Building block type method and system for building irregular model

Abstract

The invention discloses a building block type method and system for building an irregular model. The method comprises a step of carrying out initial generation of a surface parcel for executing a general rule function, a step of stretching the surface parcel to generate a surface parcel three-dimensional model and obtaining a first facade in the surface parcel three-dimensional model, a step of stretching the first facade to form a first facade three-dimensional model and obtaining a back side of the first facade three-dimensional model, a step of taking the back side as a bottom surface of aslope top to generate the slope top and obtaining a slope surface of the slope top and a second facade, and a step of obtaining a first iteration number and substituting the first facade with the second facade for iteration to generate a three-dimensional sub-model. The invention provides a block-like construction method, and the 3D modeling of a building with a curved surface shape such as a roofwith a curved surface shape and a wall body coated by a curved surface is achieved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional GIS modeling, in particular to a method and system for constructing irregular models in a building block manner. Background technique [0002] At present, 3D GIS modeling includes not only wide-area field model construction, but also local building single construction. The field model generally adopts a virtual solid model, while for a single building or community, a highly specialized artificial Manually draw software such as Sketch Up, 3DMax, AutoCAD to generate models, or use unmanned aircraft or lidar technology to realize automatic and rapid generation of point cloud data. The former unit measurement and modeling process is time-consuming, labor-intensive and costly. Although the latter can be quickly generated as a whole, it cannot deconstruct the unit model, and the details are difficult to control. The common disadvantage of both is that once a mistake is made, it cannot be reve...

AI Technical Summary

Problems solved by technology

The former unit measurement and modeling process is time-consuming, labor-intensive and costly. Although the latter can be quickly generated as a whole, it cannot deconstruct the unit model, and the details are difficult to control

The common disadvantage of both is: once a mistake is made, it cannot be reversed in time, and the rework work is heavy, and it is necessary to start all over again

For CityEngine software, although it supports rapid modeling, there is no need to start from scratch, but self-generation mainly supports regular modeling, and there is still a lack of corresponding 3D model library for irregular models. question

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