虚拟城市中世界坐标的精度问题及解决方法

Precision of World Coordinates in Virtual Cities: Problem and Solution

由于决定在虚拟现实技术中决定现实感最主要的问题指标就是浮点数的运算的精度和速度问题。所以如何在虚拟城市的输出过程中有效地解决浮点精度相关的问题,对能否精确的生成世界坐标有着重要的影响。通过使用空间分片的方法可以为浮点精度问题提供了一个解决途径。它速度快、硬件兼容性良好、可调,且不需要较高的精确浮点数或是浮点运算技巧。

In virtual reality technology,factors that affect the sense of reality most are the precision and speed of floating point calculation.Therefore,how to solve the floating point precision and correlated problems plays an important role in the settlement of world coordinates.The spatial lamination method proposed in this paper proves to be an effective way to solve the problem with high speed,good hardware compatibility and adjustable property.Moreover,high precise floating number and skill of floating point calculation are not needed.