create terrain 中文意思是什麼
create terrain
解釋
創建新地形-
I n the past, engineering designers will find it very difficult to create a profile after finishing the terrain and the alignment
然而，傳統作業上，縱斷面依靠的是定線與等高線間的內插，因此，傳統作業必須一斷一斷的繪制縱斷面圖資料。 -
In an application using the terrain lib we must first create the terrain and the display list
我們使用地形庫之前我們必須先創建地形和顯示列表。 -
As mentioned in section height maps from images, the terrain lib has a function to create a display list using triangle strips
正如前面章節從圖象到高度圖所提到的，地形庫有一個函數使用三角形帶來創建一個顯示列表。 -
After the paper sufficiently considered creation algorithmic of triangulated irregular network in time and space and analyzed three creation algorithms of tin - divide - conquer, triangulation growth, incremental insertion, the paper adopts to a new algorithm that takes advantages of divide - conquer and triangulation growth. it can create tin quickly. the paper also uses break lines, terrain feature lines, building borderlines to be restriction condition and creates triangulated irregular network based on restriction
綜合考慮不規則三角網生成演算法的時間和空間性能，分析了常用的三種tin生成演算法：分割-歸並法、三角網生長法和逐點插入法，筆者採用分割-歸並法與三角網生長法相結合的演算法，快速生成了tin ，並以斷裂線、地性線、建築物邊界為約束條件，最終生成具有約束的不規則三角網。 -
The opposite route is also possible, i. e. form a terrain, and its height map, it is possible to create a greyscale image, where each pixel ' s intensity corresponds to a relative height
相反的路線一樣是可行，例如，從一個地形，它的高度圖，我們可以創建一個灰度圖，讓其每個象素的強度代表相應的高度值。 -
Shiphandling simulator is a device that can partly imitate the true environment at sea ， and is specially designed to satisfy marine education and trains and maritime research etc. one of its key techniques is to create the virtual environment at sea ， and the terrain is its important component. according to the needs of the real time visual display of the shiphandling simulator ， this paper analyses the requirements of the geometry precision of the important islands and background hills which are within the ships ' visible scope ， and brings forward the modeling methods of the hill ' s pileup and the hill ' s silhouette edges based on contour lines. it also presents the definition of error that the hill ' s silhouette edges graph has been given and the effective scope of application ， and firstly established the error criterion of terrain model that is built in shiphandling simulator. with these two kinds of method ， the size of data storage can be minimized greatly ， and the requirements of high update rate and geometry precision for the real time visual display of the shiphandling simulator can be satisfied
船舶操縱模擬器是一種能夠部分模仿海上真實情況，專門為滿足航海教育與培訓、航海技術研究等目的而設計研製的裝置，其核心技術之一是海上視景模擬，而地形地貌是海上視景中的重要組成部分.根據船舶操縱模擬器實時視景顯示的需要，在分析航行船舶對可視范圍內重要島嶼與背景山脈的幾何精度要求的基礎上，提出了基於等高線的山形堆積建模和山形輪廓建模方法，並給出了山形輪廓圖形的誤差定義、有效適用范圍，以及船舶操縱模擬器中地形建模的誤差準則，該方法生成圖形的數據量較小，其圖形更新速率與幾何精度能達到船舶操縱模擬器實時視景顯示的要求 -
The fractal model of terrain is established based on the theory of ivs. at the same time, a algorithm based on ivs and texture mapping is put forward which help to create the dynamic visible result. the results make sure that the algorithm can meet the construction of virtual scences, so do its validity and practicability
在基於隨機插值和紋理映射相結合的演算法基礎上，以vc + +為平臺，結合opengl三維圖形庫進行編程，以二者的有機結合對分形地形的模擬生成進行了可視化的動態實驗研究，結果證實了該方法的有效性和實用性，滿足了虛擬場景的需要。
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