Collision detection method based on plant geometric features
A technology of collision detection and geometric shape, applied in the field of virtual modeling, can solve the problems of long time consumption and low positioning accuracy, and achieve the effect of improving geometric accuracy and realism
Active Publication Date: 2014-12-17
BEIJING RES CENT FOR INFORMATION TECH & AGRI
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Problems solved by technology
Locating the penetration intersection is an important link to solve the penetration intersection problem, but the existing technology has problems such as low positioning accuracy and long time consumption of the penetration intersection
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[0023] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0024] Such as figure 1 As shown, the present invention provides a kind of collision detection method based on plant geometry feature, comprises the following steps:
[0025] S1: Determine the bounding box type corresponding to each organ model of the plant according to the morphological characteristics of the plant organs. Among them, the axial bounding box is used for the branch model, the non-axial bounding box is used for the leaf model, the sphere bounding box is used for the fruit model, and the axis is used for the whole plant model. to the bounding box;
[0026] S2: Carry out spatial segmentation on the whole plant model, construct an axial bounding box for inter...
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The invention discloses a collision detection method based on plant geometric features, which comprises the following steps: S1, determining axial or non-axial envelop case type corresponding to each organ model of a plant according to the plant organ shape characteristic; S2, carrying out space division on a whole plant model, constructing an axial envelop case and carrying out intersection testing to obtain a probable intersection region of the plant organs; S3, carrying out surface element detection on the leaf tips and leaf edges of the leaf pairs in the probable intersection region of the plant organ one pair by one pair to determine the intersection state; S4, constructing an non-axial envelop case hierarchical tree on the leaves in the probable intersection region and carrying out intersection testing; and S5, carrying out triangular testing on the grids in the intersected envelop case, and judging whether the organs corresponding to the grids are intersected according to the test result. According to the method disclosed by the invention, the irrational penetrating intersection position in a plant three-dimensional model can be quickly and accurately positioned, and the revising and high-precision emulation of the plant model are facilitated.
Description
technical field [0001] The invention relates to the technical field of virtual modeling in agricultural informatization, in particular to a collision detection method based on plant geometric features. Background technique [0002] Since the beginning of the 21st century, 3D virtual simulation modeling of plant objects has been widely used in many fields such as computer graphics, virtual reality, education, game entertainment, etc. The 3D shape simulation and modeling of plant objects has become an extensive research field. hot issues. [0003] With the rapid development of agricultural information technology, emerging virtual reality technology has been increasingly applied in the field of agriculture. The primary problem in virtual agriculture is the virtual modeling of agricultural and forestry plants. Accurate and effective virtual modeling of plant objects The modeling method plays a huge role in promoting the development of modern agricultural informatization. [00...
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IPC IPC(8): G06T17/00
Inventor 赵春江郭新宇秦铨肖伯祥郭小东
Owner BEIJING RES CENT FOR INFORMATION TECH & AGRI