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首页> 外文会议>Graphics Interface; 20050509-11; Victoria(CA) >Moving Objects with 2D Input Devices in CAD Systems and Desktop Virtual Environments
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Moving Objects with 2D Input Devices in CAD Systems and Desktop Virtual Environments

机译：在CAD系统和桌面虚拟环境中使用2D输入设备移动对象

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摘要

Part assembly and scene layout are basic tasks in 3D design in Desktop Virtual Environment (DVE) systems as well as Computer Aided Design (CAD) systems. 2D input devices such as a mouse or a stylus are still the most common input devices for such systems. With such devices, a notably difficult problem is to provide an efficient and predictable object motion in 3D based on their 2D motion. This paper presents a new technique to move objects in CAD/DVE using 2D input devices. The technique presented in this paper utilizes the fact that people easily recognize the depth-order of shapes based on occlusions. In the presented technique, the object position follows the mouse cursor position, while the object slides on various surfaces in the scene. In contrast to existing techniques, the movement surface and the relative object position is determined using the whole area of overlap of the moving object with the static scene. The resulting object movement is visually smooth and predictable, while avoiding undesirable collisions. The proposed technique makes use of the framebuffer for efficiency and runs in real-time. Finally, the evaluation of the new technique with a user study shows that it compares very favorably to conventional techniques.
机译：零件装配和场景布局是桌面虚拟环境（DVE）系统和计算机辅助设计（CAD）系统中3D设计的基本任务。诸如鼠标或手写笔之类的2D输入设备仍然是此类系统最常用的输入设备。对于这样的设备，一个显着困难的问题是基于其2D运动在3D中提供有效且可预测的对象运动。本文提出了一种使用2D输入设备在CAD / DVE中移动对象的新技术。本文介绍的技术利用了这样一个事实，即人们可以轻松地基于遮挡识别形状的深度顺序。在提出的技术中，对象位置跟随鼠标光标的位置，而对象在场景中的各个表面上滑动。与现有技术相反，使用运动对象与静态场景重叠的整个区域来确定运动表面和相对对象位置。最终的对象运动在视觉上是平滑且可预测的，同时避免了不希望的碰撞。所提出的技术利用帧缓冲器来提高效率并实时运行。最后，通过一项用户研究对新技术的评估表明，它与传统技术相比非常有利。

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