增强现实系统中抛体实时旋转的研究与实现

Research and Implementation of Projectile's Real-time Rotation in Augmented Reality System

增强现实系统中的抛体运动要具有真实感,必须能让用户用手抓取、抛掷虚拟物体,并且物体的空中姿态和飞行轨迹能完全由抛掷动作所决定。研究从刚体运动学、空气动力学原理入手,分析了自然界的抛体运动。着重分析了物体旋转的原因和方式、找出抛掷动作的特征和角速度实时变化的规律,在增强现实系统中进行了技术验证。实验结果表明,该系统使用户获得了如在抛掷真实物体的体验。

The system should allow users to grasp and throw the virtual object,and the object＇s posture and trajectory should be decided by the throwing.Only by this way,projectile moving can be looked realistic in this augmented reality system.The research made use of the theories of rigid body kinematics and Aerodynamics to analyze the reasons of rotation of object and how to rotate,and found out the character of throwing and the method of computing angular velocity.The experiment demonstrates the system gives participators experiences of throwing real object.