Full-parameterization establishing method for road three-dimensional model

Abstract

The invention discloses a full-parameterization establishing method for a road three-dimensional model. The road design process is taken as the start, and design parameters of cross and longitudinal sections of a road are taken as the input. Specific establishing steps include that a plane straight curve is stretched and expanded to form a longitudinal section, a road longitudinal section straight curve is established and folded to form a road center line, ultrahigh and widened cross sections are arranged at transition feature points to form road subgrade surfaces, side lines are extracted to be crossed with terrain, filling and digging segments are judged, filling and digging sections are automatically generated through an intersection point ray method, digging faces and slope filling faces are formed, the filling and digging operation is conducted, and the road three-dimensional model is generated. According to the full-parameterization establishing method for the road three-dimensional model, the defect that input parameters are undefined in significance in an existing design process is overcome, and the full-parameterization establishing method has the advantages that the fast response to design changes is achieved, road three-dimensional design calibration is achieved, earthwork calculation is achieved, road path planning comparison and selection are achieved, and virtual wandering is achieved.

Description

technical field [0001] The invention relates to the technical field of building three-dimensional models of roads, and more specifically relates to a method for building three-dimensional road models with full parameters. Background technique [0002] At present, road 3D models are mainly used in visual representations such as virtual reality and simulation. With the vigorous development of 3D design, the 3D model of the road will gradually serve the production design, such as earthwork calculation, 2D drawing, route optimization, etc. First, the 3D model of the road needs to be able to achieve the accuracy of the design, and secondly, the road design is a continuous adjustment plan The process requires the road 3D model to be able to quickly respond to design changes. Therefore, it is of great significance to establish a fully parametric high-precision road 3D model for road design. [0003] There are two main ways to build the road 3D model. One is: based on the subgrade...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the existing shortcomings of ignoring the design process and resulting in ambiguous meanings of input parameters, and propose a method for fully parameterized establishment of a three-dimensional road model

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