Method for building three-dimensional pipeline model in parametric manner

Abstract

The invention relates to the technical field of computer graphics, and discloses a method for building a three-dimensional pipeline model in a parametric manner. The method comprises the processes of (1) preparing three-dimensional pipeline vector data; (2) generating the model, including the steps of (a) building a local coordinate system for pipelines, (b) processing three-dimensional pipeline vector data connection points, (c) processing the remaining connection points of the pipelines according to the step (b), (d) generating vertex coordinates on the edges of the cross sections of the pipelines, (e) calculating the vertex coordinates on the edges of the remaining cross sections of the pipelines according to a transfer algorithm for the vertex coordinates on the edges of the cross sections of the pipelines, (f) generating vertex indexes on the edges of the cross sections of the pipelines, (g) generating a normal line of the pipeline model and (h) generating texture coordinates corresponding to the vertexes on the edges of the cross sections of the pipelines; and (3) submitting the built three-dimensional pipeline model to a graphic rendering pipeline and displaying the three-dimensional pipeline model in the scene. The method has the advantages that (1) software implementation is easy through parametric modeling; (2) the coordinates of edge points of the cross sections of the pipelines under a global coordinate system are directly generated; and (3) two pipelines can be smoothly butted and additional processing is not needed.

Description

technical field [0001] The invention relates to the technical field of computer graphics, in particular to a method for parameterized establishment of a three-dimensional pipeline model. Background technique [0002] There are two main types of existing 3D pipeline modeling methods: one is to first establish the pipeline local coordinate system and determine the transformation relationship between the pipeline local coordinate system and the scene global coordinate system, and then generate the pipeline cross-section in the local coordinate system The coordinates are converted to the global coordinate system by using the above conversion relationship, and finally the pipeline data is submitted to the rendering pipeline for drawing and display. The other is to establish a pipeline model at the origin of the global coordinate system, and translate it to the actual space position through rotation. Although these two methods can solve the problem of 3D pipeline modeling, there ...

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Problems solved by technology

[0003] The present invention aims at the shortcomings of troublesome coordinate system conversion and inability to handle multi-point pipelines in the prior art, and provides a method for establishing a three-dimensional pipeline model with parameterization

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