Real-time dynamic drawing method for vegetation in three-dimensional virtual scene

A three-dimensional virtual, real-time dynamic technology, applied in image data processing, instruments, 3D modeling, etc., can solve the problems of layering that cannot reflect the diversity and distribution of vegetation, and the overall fidelity of the scene is not high.

Inactive Publication Date: 2015-06-10
ACADEMY OF ARMORED FORCES ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vegetation in nature has different shapes and sizes. Multi-level drawing based on distance alone cannot reflect the diversity of vegetation types and the layering of distribution, making the overall realism of the scene not high.

Method used

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  • Real-time dynamic drawing method for vegetation in three-dimensional virtual scene
  • Real-time dynamic drawing method for vegetation in three-dimensional virtual scene
  • Real-time dynamic drawing method for vegetation in three-dimensional virtual scene

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Embodiment Construction

[0044] The concrete steps of the vegetation real-time dynamic drawing method of the three-dimensional virtual scene of the present invention are as follows:

[0045] Step 1: Form a vegetation distribution grayscale map according to the distribution of vegetation in the 3D virtual scene. The distribution of vegetation is marked in the form of layers, and a layer corresponds to a vegetation, such as figure 1 shown.

[0046] The specific method is:

[0047] Step 11: According to the size of the terrain, create a grayscale image with a gray scale of 256 levels and a resolution of W×H, where X is the length of the terrain, Y is the width of the terrain, and α is the marking accuracy, which means that the distribution of vegetation can be identified The smallest unit of , then satisfy the following formula:

[0048] W / H=X / Y

[0049] X / W=α

[0050] Each pixel value of the 256-level grayscale image is represented by an 8-bit byte, and each 1 bit in the byte corresponds to a veget...

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Abstract

The invention provides a real-time dynamic drawing method for the vegetation in a three-dimensional virtual scene. The method comprises the steps of carrying out space division on a terrain scene through a Q-Tree; dividing the scene into layered space node on a two-dimension plane; on this basis, taking a chunk as a unit, and controlling vegetation generating areas and types according to the specific value of the body size of the vegetation and the chunk of a viewpoint distance, so as to ensure that the visually perceptible vegetation can be generated in an area corresponding to a vegetation distribution drawing. The real-time dynamic drawing method provided by the invention can be applicable to different terrain generating algorithms, the controllable generation and real-time drawing of various vegetations in a large area can be realized, and the better balance between the sense of reality and the instantaneity of the large area of vegetation drawn can be realized.

Description

technical field [0001] The invention belongs to the field of real-time rendering of three-dimensional complex scenes, in particular to real-time rendering of vegetation in three-dimensional scenes. Background technique [0002] In the real-time rendering of 3D complex scenes, the real-time rendering of large-scale outdoor scenes is widely used in GIS systems, flight simulation systems, VR systems and virtual battlefields. An excellent 3D outdoor scene not only needs to ensure real-time performance, but also needs to create a very realistic natural scene. The real-time rendering of large-scale vegetation is very important. On the one hand, vegetation is an important part of natural scenes. Realistic vegetation rendering is to ensure The basis for the fidelity of 3D scenes; on the other hand, there are many types, large quantities, and complex structures of vegetation in nature. The rendering of large-scale vegetation will consume a large amount of computing resources, which w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T17/00G06T7/11
Inventor 梁强王青海杜君
Owner ACADEMY OF ARMORED FORCES ENG PLA
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