ADVANCED GRAPHICS TECHNOLOGY INTERACTIVE RENDERING OF MASSIVE MODELS

GRIP项目为北卡罗来纳大学的高级 技术跟踪器工作，是由设计的跟踪器的客户 这支队伍。正如去年所指出的，北卡罗来纳大学的光学跟踪器很有吸引力 因为它不会受到由 幻影中的汽车。这种电噪声会导致严重的误差 在我们目前商用的磁力追踪器中。新的轻量化 在报告所述期间早期部署了光学跟踪器，并已 在此期间进行了测试、校准和算法改进 报告期，均方根位置噪声为0.1 mm，角度为0.03度 在定向方面。该系统测量26英寸的位置和方向 乘以30英尺的工作区域，每秒进行1500到2000次测量 延迟不到1毫秒。已经开发了软件 并对多个同时运行的跟踪器进行测试 上限(目前n=2)，以支持在 维修站。进行了实验，以确定最佳的模式 追踪器天花板瓷砖(追踪器的LED信标系统位于 磁片)，用于PIT双用户配置。我们预计将部署 在1998年3月底之前在矿坑上方安装追踪器。

The GRIP project has provided partial support for UNC's advanced technology tracker work and is a customer for trackers designed by this team. As noted last year, the UNC optical tracker is attractive in the PIT because it is immune to the electrical noise created by the motors in the PHANToM. This electrical noise causes significant error in our current commercial magnetic trackers. The new lightweight optical tracker was deployed early in the reporting period and has undergone testing, calibration and algorithmic refinement during this reporting period with RMS noise of 0.1 mm in position and 0.03 degrees in orientation. The system measures position and orientation in a 26 by 30 foot working area and makes 1500 to 2000 measurements per second with less than 1 millisecond of latency. Software has been developed and tested for multiple simultaneous trackers operating under the same ceiling (n = 2 currently) to support deployment of this tracker in the PIT. Experiments were conducted to determine an optimal pattern of tracker ceiling tiles (the tracker's LED beacon system is located in the tiles) for the PIT two-user configuration. We expect to deploy the tracker over the PIT before the end of March 1998.