【摘要】：大范圍三維城市模型數(shù)據(jù)在現(xiàn)有的單機(jī)運(yùn)行環(huán)境下,因數(shù)據(jù)量大導(dǎo)致運(yùn)行速度慢、計(jì)算耗時(shí)等難題。為解決該問(wèn)題,本文結(jié)合集群并行運(yùn)算,提出了一種基于視點(diǎn)移動(dòng)規(guī)則的大范圍三維城市模型的快速顯示方法。采用靜態(tài)細(xì)節(jié)層次簡(jiǎn)化算法將三維城市模型簡(jiǎn)化為4個(gè)分辨率層次,根據(jù)視點(diǎn)移動(dòng)規(guī)律,利用距離和偏心率選擇不同層次的細(xì)節(jié)層次模型,逐級(jí)加載不同分辨率層次模型,并在集群系統(tǒng)中并行顯示,從而有效地解決了大范圍三維城市模型加載顯示過(guò)慢、場(chǎng)景效果跳躍等問(wèn)題,實(shí)現(xiàn)了對(duì)大范圍三維城市模型的快速可視化。試驗(yàn)結(jié)果表明:隨視點(diǎn)變化分層逐級(jí)加載不同等級(jí)LOD模型,采用PC集群并行繪制,可以快速有效地對(duì)大范圍三維城市模型進(jìn)行渲染處理,在兼顧效率的同時(shí),并行地顯示模型的細(xì)節(jié),具有良好的可視化效果,對(duì)智慧城市的建設(shè)具有重要的指導(dǎo)意義。
[Abstract]:Large scale 3D urban model data in the existing single machine running environment, because of the large amount of data resulting in slow running speed, calculation time and other difficult problems. In order to solve this problem, this paper presents a fast display method of large scale 3D city model based on view moving rules. The static detail level simplification algorithm is used to simplify the 3D urban model into four resolution levels. According to the moving rule of view, the detail level models of different levels are selected by using distance and eccentricity, and the hierarchical models with different resolutions are loaded step by step. The parallel display in cluster system can effectively solve the problems of slow loading and display of large-scale 3D urban model and jump of scene effect, and realize the fast visualization of large-scale 3D urban model. The experimental results show that the LOD models of different levels are loaded step by step with the view point change, and the PC cluster is used to render the 3D urban models quickly and effectively, and the efficiency is also taken into account. Showing the details of the model in parallel has good visualization effect and has important guiding significance for the construction of intelligent city.
【作者單位】： 湖南科技大學(xué)地理空間信息技術(shù)國(guó)家地方聯(lián)合工程實(shí)驗(yàn)室;湖南科技大學(xué)地理空間信息湖南省工程實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金(41271390) 湖南省研究生創(chuàng)新基金(CX2016B541) 湖南省重點(diǎn)實(shí)驗(yàn)室開(kāi)放基金項(xiàng)目(JL16K01;CT16K02) 湖南省教育廳重點(diǎn)項(xiàng)目(16A070)
【分類號(hào)】：P208

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1 張季一;基于幾何代數(shù)的三維地籍空間數(shù)據(jù)模型研究[D];中國(guó)礦業(yè)大學(xué);2016年

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