heightfield meaning in English

用一图片的色彩数值来建立曲面。

Many fluid models just present only one aspect of fluid , and can " t present some important properties simultaneously , such as speed , heightfield etc . . which are necessary in many fluid simulation systems . although the traditional raytraced - based rendering algorithms can obtain high quality graphics , they can " t be used in real - time systems . this paper investigates the existing fluid models and rendering algorithms firstly
许多现有的流体模型只能单独描述流体的某些属性，不能同时描述流体的一些重要属性，如：速度，高度域等，而这些属性在很多与水流有关的仿真系统中是必不可少的；传统的光线跟踪渲染算法能够产生具有很强真实感的图形，但是不能够满足实时的需求。