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Immersive virtual firework simulation method based on sketch retrieval and controllable shape

A simulation method and immersive technology, applied in the direction of graphic image conversion, 3D image processing, image data processing, etc., can solve the problem of no user operating virtual objects and so on

Active Publication Date: 2019-08-23
ZHEJIANG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, in the existing firework simulation methods, there is no firework model that allows users to operate virtual objects, allows entertainers to more intuitively contact the game scene, and highly immerse themselves in the virtual world. Therefore, the simulation of traditional phenomena and virtual reality Combined, it has extraordinary significance

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  • Immersive virtual firework simulation method based on sketch retrieval and controllable shape
  • Immersive virtual firework simulation method based on sketch retrieval and controllable shape
  • Immersive virtual firework simulation method based on sketch retrieval and controllable shape

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Embodiment Construction

[0037] Further description will be made below in conjunction with the accompanying drawings and specific embodiments of the present invention.

[0038] Such as Figure 1 to Figure 5As shown, on the server side, using the line drawing rendering technology, the 3D fireworks model in the data is used to generate 2D line drawing groups from various viewing directions. In order to simplify the pipeline, 102 viewpoints are uniformly selected on the 3D fireworks model sphere, from The 3D firework model is projected into the 2D line drawing group in 102 viewpoint directions. Then, the features of the 2D line drawing group are extracted through a filter, and the 2D line drawing group is encoded as a local image descriptor. Construct a visual dictionary (visual vocabulary) through the K-means clustering algorithm. Each cluster centroid obtained in the clustering algorithm represents a visual word (visual word), quantify the local image descriptor of each 2D line drawing, and determine ...

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Abstract

The invention discloses an immersive virtual firework simulation method based on sketch retrieval and controllable shape, which comprises the following steps: (1) at a client, enabling a user to drawa sketch of a desired viewing model in a virtual scene as system input; (2) at a server side, retrieving a 3D firework model most similar to the drawn sketch by utilizing a model retrieval method, andtaking the 3D firework model as a 3D result model; (3) selecting a clustering centroid, forming an intermediate shape after the clustering centroid converges, and simulating a first-stage explosion process from an emission point to the intermediate shape; and (4) storing the sampling vertex position and the texture coordinate of the 3D result model obtained in the step (2), and simulating a second-stage explosion process from the intermediate shape to the final shape. According to the method, the user is immersed in the virtual scene, the hand draws the firework shape which the user wants towatch, and the server processes and simulates the multi-stage explosion of the firework, so that the user can experience vivid visual special effects.

Description

technical field [0001] The invention relates to the technical fields of computer graphics and virtual reality, in particular to an immersive virtual fireworks model method based on sketch retrieval and controllable shape. Background technique [0002] At present, the simulation of fireworks adopts the particle system. The particle system is a technology for simulating some specific fuzzy phenomena in 3D computer graphics. This technology uses a large number of small patches, 3D models or other graphics primitives to simulate some irregularities. The ambiguity phenomenon, constructing complex objects with simple elements. After more than 20 years of development, particle systems are widely used to simulate fire, dust, clouds, fog, smoke, water flow, explosion sparks, meteor trails and other complex objects without obvious smooth surfaces. [0003] Usually the position and movement of particle systems in 3D space are controlled by emitters. Emitters are primarily represented...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T19/20G06T15/04G06T3/00G06K9/62
CPCG06T19/20G06T15/04G06F18/23213G06T3/067
Inventor 崔逍宇金小刚
Owner ZHEJIANG UNIV