| 1. | Research on primitive geometric elements intersection test in virtual environment
虚拟场景中基本几何元素相交测试技术 |
| 2. | Thus the intersection test between two bounding volumes need only at most k comparisons , ( k is the size of fixed direction set . )
通过这种简单的区间测试法，两个包围盒间的相交测试最多只需要k次比较运算( k为固定方向集合的大小) 。 |
| 3. | The arithmetic method of intersection tests in an ahs simulation system based on magnetic - marker navigation , using the way named by " transparent walls " . and this method is put into use in the virtual scene system now
尤其利用“隐形墙”技术设计了基于磁性导航的磁道钉系统的碰撞检测算法，并在视景系统中得到应用。 |
| 4. | ( 3 ) the intersection tests of dynamic objects and static ones in the scene such as the bump between a car and the parterre on the roadside are developed , and the clues is given on the screen
( 3 )实现了动态物体和静态物体的碰撞检测，并提示相应信息；在虚拟试验场场景中实现了对车辆相对于磁道钉位置的检测模拟，以利于后续自动控制模型的处理。 |
| 5. | Based on researching and developing intrinsic character of fixed direction hulls , this paper develops and proves the property which make it can be apply to collision detection in complex environment and resolves the problems about intersection tests between bounding volumes , updating bounding volumes after rotation and updating bounding volume hierarchy after deformation
本文在充分研究了固定方向凸包的固有特性的基础上，开发并证明了它适用于复杂环境中软体碰撞检测的性质，并着重解决了包围盒间的相交测试、对象运动后包围盒的更新、对象变形后包围盒树的更新等问题。 |
| 6. | The idea behind it is to approximate the object with a simpler bounding volume that is a little bigger than the object . in building hierarchies on object , one can obtain increasingly more accurate approximations of the objects . so during traversing bounding volume hierarchy , it speeds up collision detection by prune away primitive pairs , which will not intersect clearly though rapid intersection test between bounding volumes and just deal with those whose bounding volume is intersected
层次包围盒方法是解决碰撞检测问题固有时间复杂性的一种有效的方法，它是用体积略大而几何特性简单的包围盒来近似地描述复杂的几何对象，并通过构造树状层次结构来逼近对象的几何模型，从而在对包围盒树进行遍历的过程中，通过包围盒间的快速相交测试来及早地排除明显不可能相交的基本几何元素对，而只对包围盒重叠的部分元素进行进一步的相交测试，以提高碰撞检测的速度。 |
| 7. | This paper brings forward and proves a rapid interval test for resolving intersection tests between bounding volumes . it determine two bounding volume do not overlap by checking if one of their bound intervals on direction axis defined by the fix direction set does not overlap
文中提出并证明了一种快速区间测试法以解决两个固定方向凸包包围盒间的相交测试问题，通过查找两个包围盒在由固定方向集合所定义的方向轴上的范围区间是否存在不重叠的情况，来判断它们是否不相交。 |
| 8. | This is a heuristic strategy . it can reduce the intersection tests need to be computed between bounding volumes by tracing the traverse process in previous time to gain traverse path in current time . the correctness and validity of collision detection can be guaranteed by maintaining the tracing list
这是一个启发式的策略，通过跟踪国防科学技术大学研究生院学位论文上一时间采样点对包围盒树的遍历过程，确定当前时间采样点的遍历路径，从而有效地减少了遍历过程中包围盒相交测试的次数，提高了算法效率，同时通过对跟踪表的维护，保证了碰撞检测的正确性和有效性。 |
