Local precision constrained three-dimensional landform generation method

Abstract

The invention provides a local precision constrained three-dimensional landform generation method. Rhombus and square algorithms are optimized by the method so that sublevel constrained control is realized, and the generated landform morphology is enabled to be closer to a natural form. Fixed form data are introduced via local constraining conditions to generate a high-fidelity natural effect, and center constraining is performed by extracting center part grids so that landform precision is greatly enhanced. The generated data volume is large, overall high-resolution data can be generated according to requirements, and the local precision requirement can be met. Data points are stored by using a relatively complex linked list structure in storage so that a problem of physical memory large area continuous distribution is reduced. Defects of the three-dimensional landform generation method that the overall landform precision is limited and local landform precision cannot be modified are solved by the local precision constrained three-dimensional landform generation method so that the local precision constrained three-dimensional landform generation method has wide popularization and application prospect in the aspect of visual simulation system three-dimensional landform development, such as rocket launching, lunar surface work and near surface layer work.

Description

technical field [0001] The invention relates to a three-dimensional terrain generation method, in particular to a local precision-constrained three-dimensional terrain generation method, which belongs to the technical field of three-dimensional visualization. Background technique [0002] In today's digitized and informatized world, with the continuous expansion of geographic information applications, traditional two-dimensional maps can no longer meet people's needs, and people are beginning to pay more and more attention to three-dimensional topographic maps with rich topographic and topographical information. However, due to the complex and diverse natural terrain and limited computer processing power, there are problems in this field such as limited precision of visualization processing and lack of realism in 3D display effects. [0003] At present, mature commercial modeling software such as 3D MAX, VUE and VTB are widely used in the field of 3D visualization to realize...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a three-dimensional terrain generation method for local precision constraints in view of the lack of accuracy of the above-mentioned terrain generation method, and realize constraint control by optimizing the rhombus-square algorithm, so that the generated terrain shape is closer to the natural shape , through local constraints, the introduction of fixed shape data produces highly realistic natural effects, and by extracting the middle part of the grid, the center is constrained, which greatly improves the accuracy of the terrain; the invention generates a large amount of data, and can generate overall high-resolution high-rate data, and meet the local precision requirements; when storing, by using a more complex linked list structure to store data points, the problem of continuous allocation of large areas of physical memory is reduced

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