大规模三维地形可视化算法的研究及应用

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4、ᵨõ"ᨬᜧḄLᱯøJ#$ÌâãOP%&，½k⌕%᦮LḄᙢâã(ᜐᙠᑖ᳛。⑵y[ᦪßᙠ᜜Ô*NḄ+,⚣᳛W#.，ᦪßᙠ᜜ÔḄóôÔ/OP[0CḄË$，Îᵨ[,ïÔ/îï᪛c1ᐭḄîï᪛3"ᦪßË$*，SÔ/Ḅ⚔øᦪß5Ḅᒈᑖ67d，Sᦪßᶒᨵ$Ìឋcᦪßឋ。⑶é:;ᙢᦪß<=ᜧ，ᵨ¨!Ḅ5ᦪ<>，?@ᐸᐰÌOSOARḄABᑁÔ½，ᑣ◤⌕D8CḄᦪßüý。EØᡃFG᦮LḄᙢHIᵨîï᪛ñ᪀OPóô，GᑖᙽḄᙢᑖyùJ，⚜ùJckùJ，᪷ßøḄMᓄᙢᦪßOP½üý。⑷à¨`Oᳮ

5、，QᵨMicrosoftVC.NETQyRrICᶒ，OpenGLQySRrT，Îᵨ☢ᔣWḄXYcóÄRrᢈ;᪀![ᙢᓄZ[。ᔜ]#ᙽᒹ^ᙢᦪßᜐᳮcóôᙽ、ᙢ_ᙽ、HID`ᙽ、ᙢᦪßüýcaᳮᙽ，é[ᜧᙢḄ?½_。ᐵbc：ᙢᓄ;⁚；dM；eᒆ◀；gᳮhS；ᐝ᯿.I万方数据᪺᪍ᵯ~&ᢈᜧ%%-ᦻAbstractInthisthesis,wediscussthevisualizationalgorithmsoflarge-scale3Dterraindata(basedonr

6、egularsquaregriddataformat),andimplementtheapplicationofSOAR.WerealizesimplifiedterrainmodeloneveryblockdatabyusingSOARalgorithm,andorganizetheseblockterraindatawithquad-treedatastructure.Atthesametime,weimplementwalk-throughonlarge-scaledterrainbasedonview-depen

7、dentvisualiza-tion,massiveterraindata’sdynamicschedulingstrategy,andeliminatecrackswhichbetweentwodifferentresolutionterrainblock.Alltheresearchworkarelistbelow:(1)Wediscusstheterrainmodelingwithcontinuouslevelofdetail.Werecursivelysubdivideatrianglemeshdefinedov

8、erregularlygriddeddatausinglongestedgebisec-tion,themeshesproducedbythissubdivisionschemehavethepropertythattheycanberefinedlocallywithouthavingtomaintaintheen