计算机应用与软件
計算機應用與軟件
계산궤응용여연건
COMPUTER APPLICATIONS AND SOFTWARE
2014年
1期
77-80
,共4页
海底地形%几何多重映射算法%分形算法%消除裂缝
海底地形%幾何多重映射算法%分形算法%消除裂縫
해저지형%궤하다중영사산법%분형산법%소제렬봉
Seabed terrain%GeoMipMap algorithm%Fractal algorithm%Cracks elimination
针对快速绘制大规模海底地形的问题,提出基于几何多重映射算法与分形算法相结合生成地形的方法,采用顶点索引和分层分块的方法来组织地形数据。该方法对三维海底地形模型进行子块划分,通过可见性判别只显示视区内的子块。同时建立一种基于块和视点的简化准则,通过该准则提出消除不同细节层次的地形块之间的裂缝的方法,以保证地形精简过程中不丢失必要的细节。仿真实验证明该研究成果能够有效实现地形的实时绘制。
針對快速繪製大規模海底地形的問題,提齣基于幾何多重映射算法與分形算法相結閤生成地形的方法,採用頂點索引和分層分塊的方法來組織地形數據。該方法對三維海底地形模型進行子塊劃分,通過可見性判彆隻顯示視區內的子塊。同時建立一種基于塊和視點的簡化準則,通過該準則提齣消除不同細節層次的地形塊之間的裂縫的方法,以保證地形精簡過程中不丟失必要的細節。倣真實驗證明該研究成果能夠有效實現地形的實時繪製。
침대쾌속회제대규모해저지형적문제,제출기우궤하다중영사산법여분형산법상결합생성지형적방법,채용정점색인화분층분괴적방법래조직지형수거。해방법대삼유해저지형모형진행자괴화분,통과가견성판별지현시시구내적자괴。동시건립일충기우괴화시점적간화준칙,통과해준칙제출소제불동세절층차적지형괴지간적렬봉적방법,이보증지형정간과정중불주실필요적세절。방진실험증명해연구성과능구유효실현지형적실시회제。
In light of the issue of fast large-scale seabed terrain rendering,we present the terrain generation method which is based on combining the geometrical mipmapping (GeoMipMap)algorithm with fractal algorithm,and use the methods of vertex-index and stratified blocking to organise terrain data.The method divides 3D seabed terrain into sub-blocks,through visibility discrimination only those sub-blocks within visual area are displayed.At the same time a simplified criterion based on block and view-point is set up,and the way of eliminating cracks between the terrain blocks with different detailed layers is presented through the criterion in order to make sure that no necessary details will be lost in terrain streamlining process.Simulation experimental result proves that the research outcome can effectively realise real-time terrain rendering.