A hybrid level‐of‐detail representation for large‐scale urban scenes rendering

Zhou, Shengchuan; Yoo, Innfarn; Beneš, Bedřich; Chen, Ge

doi:10.1002/cav.1582

Cited by 4 publications

(4 citation statements)

References 35 publications

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“…지형 모델을 여러 타일(Tile)로 분할하고 사용자 뷰 포트에 따라 알맞은 지형 타일 모델을 쿼드 트리로 렌더링하 는 방식이다. Zhou,S.외는 대규모 3D 도시 모델을 렌 더링하기 위하여, 사용자 뷰 포트와 3D 건물의 위치 를 계산하여 정점(Vertex)과 선(Edge)을 축소하는 자동 LOD 시스템을 제안하였다 [3] .…”

Section: 관련 연구unclassified

Point Cloud Data Driven Level of detail Generation in Low Level GPU Devices

Kam¹,

Gu²,

Jin³

2020

J. KIMS Technol

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Virtual world and simulation need large scale map rendering. However, rendering too many vertices is a computationally complex and time-consuming process. Some game development companies have developed 3D LOD objects for high-speed rendering based on distance between camera and 3D object. Terrain physics simulation researchers need a way to recognize the original object shape from 3D LOD objects. In this paper, we proposed simply automatic LOD framework using point cloud data (PCD). This PCD was created using a 6-direct orthographic ray. Various experiments are performed to validate the effectiveness of the proposed method. We hope the proposed automatic LOD generation framework can play an important role in game development and terrain physic simulation.

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Section: 관련 연구unclassified

Point Cloud Data Driven Level of detail Generation in Low Level GPU Devices

Kam¹,

Gu²,

Jin³

2020

J. KIMS Technol

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“…To solve this problem, most of flight simulator employs the specific method to reduce the rendering data in efficient way. Two famous methods, Level of Detail (LOD) [1] and culling scheme [2], have been proposed but they work in completely different way. The former is to reduce the amount of data by introducing multiple levels to represent the object.…”

Section: Introductionmentioning

confidence: 99%

Level of detail parent and dynamic culling scheme for flight simulator

Lee¹,

Kim²,

Kim³

2018

IJET

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Background/Objectives: Due to huge volume of data, it is required to reduce the number of vertices in flight simulator through level of detail and culling. However, it is required to integrate them accordingly.Methods/Statistical analysis: Due to high point of view, terrain data in wide area are usually rendered in the flight simulator. So, conservational level of detail and culling schemes have adaptation problem in flight simulator. To defeat this problem, dynamic culling scheme and level of detail parent method based on line of sight are proposed.Findings: Experiment scenarios are built to measure and compare the frame per second and number of vertices in four separate schemes, that is, scheme without the proposed algorithm, applying view frustum culling and applying culling and level of detail together and graphic processing unit based parallel processing algorithm, respectively. The proposed scheme reveals the similar values in the case of small-volume of terrain data. On the other hand, frame per second is significantly improved in huge volume of terrain data by reducing the number of vertices through dynamic culling and level of detail parent method. Specially, when level of detail parent method is applied to rendering the city with large number of buildings, the proposed scheme reveals the best frame per second among the comparative schemes.Improvements/Applications: Improved rendering algorithm was proposed to handle huge volume of terrain data and thereby to prove the applicability of the proposed scheme in other simulator.

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“…Currently, 3D virtual reality applications, such as virtual cities , industrial simulations, and online games, are spreading widely across the Internet. 3D technology increases the users interactive immersion but brings the challenge of processing data efficiently for huge virtual scenes.…”

Section: Introductionmentioning

confidence: 99%

Interest‐driven avatar neighbor‐organizing for P2P transmission in distributed virtual worlds

Wang

Jia

Xie

et al. 2015

Computer Animation & Virtual

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The neighbor table/distributed hash table (DHT) is used to choose the data supplier for data‐dispatching services in distributed virtual environments based on peer‐to‐peer networks. It is essential that a stable and efficient neighbor table/DHT be maintained. Because the avatar has much freedom to roam, the spatial distribution of nodes is not uniform, and the logical topology may change dramatically. Therefore, traditional construction mechanisms, such as the neighbor‐discovery mechanism based on spatial distance or DHT, may involve fierce churn in the neighbor table and frequent message exchanges. In this paper, we proposed a dynamic node‐organizing mechanism that aims to solve these challenging problems by applying the avatar's behavioral characteristics to the neighbor maintenance mechanism and scene data transmission. First, we have summarized the common social behaviors of avatars and extracted their characteristics. We then propose an interest‐similarity measuring algorithm to divide the node into diverse clusters. Next, we measure the cluster stability in terms of interest entropy while constructing a stable neighbor mesh for each node in a cluster. We have conducted extensive simulation experiments that simulate avatar behaviors in a popular massively multiplayer online game. The results show that our proposed mechanism achieved a substantial alleviation of neighbor churn and reduced information exchange, which improves the transmission efficiency in distributed virtual environments. Copyright © 2015 John Wiley & Sons, Ltd.

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A hybrid level‐of‐detail representation for large‐scale urban scenes rendering

Cited by 4 publications

References 35 publications

Point Cloud Data Driven Level of detail Generation in Low Level GPU Devices

Point Cloud Data Driven Level of detail Generation in Low Level GPU Devices

Level of detail parent and dynamic culling scheme for flight simulator

Interest‐driven avatar neighbor‐organizing for P2P transmission in distributed virtual worlds

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