3D Maps Symbol Modeling Of Terrain Emulate

With the fast development of information technology which affects to the future military deeply, more and more countries try their best to build "digital battlefield". Using modern virtual reality of computer to build 3D maps is one of the most important taskes in "digital battlefield". It is a qickly way by using 2D maps which we had Digitaled before to modeling 3D maps.After making reference and analyzing the domestic and international articles and documents,Author makes a research on 3D Symbol modeling based on correlative theory and practice, and writes test progam by using Microsoft(?) DirectX development Tools; The main content are abstracted as following:(1) Introduce the character and meaning of 3D Symbol. 3D Symbol is the product of computer simulation technology, which accords with the format transfer theory of map and the rule of designing map symbol .The most important charater is by using 3D to transfer mapped objects because it looks like objects .(2) Introduce Microsoft(?) Direct3D API(Application Program Interface). Although Direct3D API is not used to write program of scientific calculate and had some shortages in the past, comparng with OpenGL, Direct3D API has more advantages by continually updating.(3) Analyze modeling theories and practices, and also state the elements of 3D symbol automatic modeling form 2D map,such as distribution of 3D objects,modeling 3D objects and effect on terrain.Automatic modeling is the most difficult part in 3D symbol designing, at the same time, it's import key of quckly...