Multiresolutional Visualisation of Triangulated Models Over Internet Sebastian Krivograd Laboratory for Geometric Modelling and Multimedia Algorithms

Introduction 3D flight over Slovenia internet application

Basic Idea client - server architecture different connection throughput different visualisation speed (hardware acceleration)

Problems huge 3D data transmission over internet visualisation of huge data

Server Side data stored in multiresolutions data divided into UPS cache for requests from clients

Data Storage on Server Side

Two Threads on Server Side for receiving the requests while (TRUE) {get request from client store request in cache of requests } for sending data according to requests while (TRUE) {if any request in cache of requests { get request from cache of requests send data to the client who sent request }

Client Side limited memory cache of packages that client gets UPS for all packages on client side

Functions on the Client Side request for low resolution data sending requests according to the users movement receiving the requested data from server visualise only packages that are needed from user point of view removing of packages that are not needed

Thread for R equests of Data while (TRUE) {find the vector of users movement travel from user position in vector direction to find missing packages send request for missing packages }

Prediction Which Packages Will be Needed

Thread for Receiving the Data while (TRUE) {if (package is received from server) { insert package in cache of received packages if (cache of received packages > MAX_SIZE) remove at least needed package from cache }

Main Thread of Client request for low resolution data and waiting for answer while (TRUE) {according to user position insert packages from cache in visualisation triangular mash if (visualisation triangular mash > MAXSIZE) remove not needed packages from visualisation triangular mash visualisation of triangular mash }

Insertion and Removal of Packages

Structure Of Whole System

Compression of Triangular Mesh V 0 V 1 V 2 b0V 4 b1V 5 b2V 6 c05 b3V 7 b1V 8 c42 d01 f3V 8 e513 d6 d2 d0

Operation Symbols

Additional Compression divide whole list on three parts –operations (b b b c b b c d f e d d d) –vertices (V 0 V 1 V 2 V 4 V 5 V 6 V 7 V 8 V 8 ) –edges ( ) compress each part by it self

My Future Work Implementation of this process of sending data over internet and making the application of flight over the Slovenia