A display control method and device for a three-dimensional terrain model

A display control method and three-dimensional terrain technology, applied in 3D modeling, data processing input/output process, image data processing, etc., can solve problems such as calculation resources and visual effect conflicts of three-dimensional topographic maps, and achieve a balance between computer speed and The conflict of visual effects, the balance of computing load, and the effect of enhancing user experience

Inactive Publication Date: 2018-09-07
INST OF FOREST ECOLOGY ENVIRONMENT & PROTECTION CHINESE ACAD OF FORESTRY +1
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Problems solved by technology

[0005] Embodiments of the present invention provide a display control method and device for a three-dimensional terrain model to solve the problem of conflicts between computing resources and visual effects of three-dimensional terrain maps in the process of generating virtual forests in the prior art

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  • A display control method and device for a three-dimensional terrain model
  • A display control method and device for a three-dimensional terrain model
  • A display control method and device for a three-dimensional terrain model

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Embodiment Construction

[0056] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0057] see figure 1 , which is a schematic flowchart of a display control method for a three-dimensional terrain model provided in an embodiment of the present invention, the display control method includes the following steps:

[0058] Step S101: Acquire DEM model data, and generate a first three-dimensional terrain model according to...

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Abstract

Embodiments of the invention disclose a display control method and apparatus for a three-dimensional terrain model. The method comprises the steps of obtaining DEM data and generating a first three-dimensional terrain model according to the DEM data; calculating the DEM data to obtain a relative terrain height; obtaining an observation height corresponding to a current vision field; according to the observation height and the relative terrain height, calculating a height ratio; according to the height ratio, adjusting a spatial polygon sampling span corresponding to the current vision field; and finally sampling spatial polygons in the current vision field according to the sampling span, and after sampling, displaying a second three-dimensional terrain model. In an actual working process, when the number of the spatial polygons in the vision field is increased, the sampling span is increased to neutralize the increment of the number of the spatial polygons so as to balance a calculation load; when the vision field is reduced, the sampling span is reduced, so that more three-dimensional terrain details are displayed without increasing the calculation amount, and the visual effect is enhanced; and the adjustment effectively balances the conflict between the computer speed and the visual effect, thereby enhancing the user experience.

Description

technical field [0001] The invention relates to the technical field of forestry, in particular to a display control method and device for a three-dimensional terrain model. Background technique [0002] Virtual forestry technology is a technology that intuitively, accurately and interactively simulates the terrain, tree species composition, tree height, gas source, distribution and other information of large-scale forest locations. Synthesize the three-dimensional topographic map constructed by the three-dimensional terrain model and the digital forest appearance map containing forest information, and perform tree species appearance processing to generate a virtual forest appearance. The virtual forest phase is the concentration of all forest phase information, which has the characteristics of accurate information, intuitive images, large display area and high information integrity. Intuitively display various forest information of vast forest locations. [0003] Among the...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/05G06F3/0481
CPCG06F3/04815G06T17/05
Inventor 刘世荣罗传文
Owner INST OF FOREST ECOLOGY ENVIRONMENT & PROTECTION CHINESE ACAD OF FORESTRY
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