Tunnel advanced geological forecast abnormal body three-dimensional marking and drawing method and system

Abstract

The invention provides a tunnel advanced geological forecast abnormal body three-dimensional marking and drawing method and system. The method comprises the steps of conducting the two-dimensional marking on forecast body slices; connecting the marked discrete points to draw a two-dimensional graph consisting of triangular patches according to the marks on the two-dimensional slices; searching boundary points of the graph according to the drawn two-dimensional graph; automatically judging the type of the two-dimensional graph according to the side length of the triangle corresponding to the two-dimensional boundary point, if the two-dimensional graph is concave, solving the concave boundary point, if the two-dimensional boundary point is convex, directly solving the boundary point; performing polar coordinate sorting on the searched boundary points, including all boundary points, and uniformly collecting a plurality of points on an included curve to serve as points connected with different sections; sequentially labeling all the two-dimensional slices, and connecting points connected with different sections on all the sections to form a three-dimensional body; adding texture mapping, expanding the three-dimensional vertex through a plane and mapping the vertex to a two-dimensional plane, achieving the texture mapping of the three-dimensional abnormal body, and displaying the abnormal body in a three-dimensional mode.

Description

technical field [0001] The disclosure belongs to the technical field of advanced geological prediction of tunnels, and relates to a method and system for three-dimensional labeling and drawing of anomalies in advanced geological prediction of tunnels. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art. [0003] At present, 3D volume rendering mainly has two rendering methods based on surface rendering and volume rendering, which are mainly rendering algorithms implemented on the basis of existing data. These two rendering algorithms can only render ideal rendering data, but in In the advanced geological prediction of tunnels, due to the influence of complex geological environment and the influence of data acquisition noise, we cannot accurately generate very accurate and ideal data, and often require professional geological forecasters with rich techn...

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Problems solved by technology

[0003] At present, 3D volume rendering mainly has two rendering methods based on surface rendering and volume rendering, which are mainly rendering algorithms implemented on the basis of existing data. These two rendering algorithms can only render ideal rendering data, but in In the advanced geological prediction of tunnels, due to the influence of complex geological environment and the influence of data acquisition noise, we cannot accurately generate very accurate and ideal data, and often require professional geological forecasters with rich technical experience to identify the predicted data and realize the final geological Forecast result

In the traditional tunnel geological forecast display, the tunnel forecast results are usually displayed in the form of two-dimensional slices, and the effect is not very three-dimensional and intuitive.

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