3维地形环境仿真中点阵文本技术研究

Research on Lattice Text in VxWorks-Based 3 D Terrain Environment Simulation

在3维地形环境仿真中,经常需要输出大量文本信息。通常的做法是用位图方式进行渲染,但在某些情况下(如嵌入式操作系统)无法实现这一功能。针对某些3维地形环境仿真中位图方式渲染文本的局限性,研究如何用点阵方式渲染文本。研究内容包括点阵字库的创建和点阵文本的渲染,并根据实时渲染中不同类型文本的特点,将点阵文本的渲染分为缓存和非缓存两种方式。最后在基于VxWorks嵌入式系统的3维地形环境中实现了点阵文本的渲染。

There are always many text to be rendered in 313 terrain environment simulation. However, it is impossible to do so in some situations, such as in embedded operating systems. A research on how to render lattice text in 3D simulation was put forward,just because the way of bitmap could not be used in some special situations. The emphasis lied on how to design and implement a lattice font library, and how to render lattice text by way of buffered and unbuffered. At last, a VxWorks-based prototype was given to test the above.