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Bulletin board generation method and device

A technology for generating devices and bulletin boards, applied in image data processing, 3D image processing, instruments, etc., can solve the problems of obvious artificial traces, single shape of leaves and leaves, increase the sense of randomness, avoid sudden jumps, and eliminate Z- Effects of Fighting Phenomenon

Inactive Publication Date: 2018-05-15
BEIJING PIXEL SOFTWARE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The inventor found through research that in the prior art, due to the shortcomings of the shape and mutual positional relationship of the generated bulletin boards, the leaf shape of the obtained leaves is single and the artificial traces are obvious

Method used

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  • Bulletin board generation method and device
  • Bulletin board generation method and device

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Embodiment Construction

[0049] In the prior art, the generated bulletin boards generally have a uniform shape, resulting in monotonous leaf shapes and obvious artificial traces. The inventors found that the randomness of real leaves is strong, and it is difficult to find leaves with repeated shapes. Therefore, the grid of the leaves should have a certain degree of randomness instead of a uniform shape. Moreover, in the prior art, the generated bulletin boards are on parallel planes. When the camera is rotated, the rear blades will suddenly jump out, and at certain angles, it is easy to appear that some bulletin boards are very close to each other. In some cases, due to the limitation of the accuracy of the depth buffer, it is difficult to correctly judge the depth values ​​of the two when the depth difference is very small, resulting in unpredictable results of the depth test. The phenomenon of Z-Fighting appeared.

[0050] Based on the above research, the embodiment of the present invention provide...

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Abstract

Embodiments of the invention provide a bulletin board generation method and device. The method comprises the following steps of: importing a bulletin board facet on a plane formed by a first vector and a second vector, wherein the first vector is vertical to the second vector; randomly rotating the bulletin board facet by taking a third vector as an axis, wherein the third vector is vertical to the plane formed by the first vector and the second vector; and adjusting positions of vertexes included in the rotated bulletin board facet so as to obtain an adjusted bulletin board facet. According to the bulletin board generation scheme, shapes of bulletin board facets are changed too increase randomness of the bulletin board facets, and through adjusting the positions of vertexes included in the bulletin board facets, mutual position relationships between the bulletin board facets are changed, so that a phenomenon that behind bulletin board facets suddenly jump out during angle change is avoided, and a Z-Fighting phenomenon is eliminated.

Description

technical field [0001] The present invention relates to the field of computer graphic calculation, in particular to a method and device for generating a bulletin board. Background technique [0002] The bulletin board is a special patch, it will be rotated according to the angle of the camera, so that it always faces the camera, so that a richer effect can be obtained with fewer patches. It can be used in trees to express very dense leaves with very few patches. This technique is widely used in real-time rendering. [0003] The inventors have found through research that, in the prior art, due to the defects in the shape and mutual positional relationship of the generated bulletin boards, the resulting leaves have single blade shapes and obvious artificial traces. Contents of the invention [0004] In view of this, the object of the present invention is to provide a method and device for creating a bulletin board to solve the above problems. [0005] A preferred embodimen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T15/00G06T15/55
CPCG06T15/005G06T15/55
Inventor 罗树权
Owner BEIJING PIXEL SOFTWARE TECH
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