面向钢结构建筑吊装施工,分析了实际施工场景的碰撞特点,提出了基于包围盒以及层次包围盒法的碰撞检测策略以满足虚拟吊装场景对碰撞检测性能的要求;重点研究了建筑施工中常用的大型吊装机械虚拟塔吊的碰撞检测方法,并基于先进虚拟现实...面向钢结构建筑吊装施工,分析了实际施工场景的碰撞特点,提出了基于包围盒以及层次包围盒法的碰撞检测策略以满足虚拟吊装场景对碰撞检测性能的要求;重点研究了建筑施工中常用的大型吊装机械虚拟塔吊的碰撞检测方法,并基于先进虚拟现实软件开发平台EON Professional 6.0及其碰撞组件实现;构建了3个虚拟吊装场景,实现了虚拟吊装场景碰撞检测性能测试;为了不影响虚拟塔吊各子部件之间牵连运动仿真的实现,同时兼顾提高碰撞检测的性能,基于哈夫曼树的应用特点,构建了虚拟塔吊碰撞检测哈夫曼树,并优化设计了存储结构,在此基础上,提出了虚拟塔吊CollisionDecHuffman碰撞检测算法。研究结果表明:基于包围盒以及层次包围盒的碰撞检测策略适用于虚拟吊装施工场景;虚拟塔吊层次树结构的设计会影响其碰撞检测的性能;CollisionDecHuffman碰撞检测算法降低了虚拟塔吊碰撞检测的平均查找长度,对于提高碰撞检测速度是有效的。展开更多
This paper builds a binary tree for the target based on the bounding volume hierarchy technology,thereby achieving strict acceleration of the shadow judgment process and reducing the computational complexity from the ...This paper builds a binary tree for the target based on the bounding volume hierarchy technology,thereby achieving strict acceleration of the shadow judgment process and reducing the computational complexity from the original O(N^(3))to O(N^(2)logN).Numerical results show that the proposed method is more efficient than the traditional method.It is verified in multiple examples that the proposed method can complete the convergence of the current.Moreover,the proposed method avoids the error of judging the lit-shadow relationship based on the normal vector,which is beneficial to current iteration and convergence.Compared with the brute force method,the current method can improve the simulation efficiency by 2 orders of magnitude.The proposed method is more suitable for scattering problems in electrically large cavities and complex scenarios.展开更多
文摘面向钢结构建筑吊装施工,分析了实际施工场景的碰撞特点,提出了基于包围盒以及层次包围盒法的碰撞检测策略以满足虚拟吊装场景对碰撞检测性能的要求;重点研究了建筑施工中常用的大型吊装机械虚拟塔吊的碰撞检测方法,并基于先进虚拟现实软件开发平台EON Professional 6.0及其碰撞组件实现;构建了3个虚拟吊装场景,实现了虚拟吊装场景碰撞检测性能测试;为了不影响虚拟塔吊各子部件之间牵连运动仿真的实现,同时兼顾提高碰撞检测的性能,基于哈夫曼树的应用特点,构建了虚拟塔吊碰撞检测哈夫曼树,并优化设计了存储结构,在此基础上,提出了虚拟塔吊CollisionDecHuffman碰撞检测算法。研究结果表明:基于包围盒以及层次包围盒的碰撞检测策略适用于虚拟吊装施工场景;虚拟塔吊层次树结构的设计会影响其碰撞检测的性能;CollisionDecHuffman碰撞检测算法降低了虚拟塔吊碰撞检测的平均查找长度,对于提高碰撞检测速度是有效的。
基金the National Natural Science Foundation of China under Grants No.62231021 and No.92373201.
文摘This paper builds a binary tree for the target based on the bounding volume hierarchy technology,thereby achieving strict acceleration of the shadow judgment process and reducing the computational complexity from the original O(N^(3))to O(N^(2)logN).Numerical results show that the proposed method is more efficient than the traditional method.It is verified in multiple examples that the proposed method can complete the convergence of the current.Moreover,the proposed method avoids the error of judging the lit-shadow relationship based on the normal vector,which is beneficial to current iteration and convergence.Compared with the brute force method,the current method can improve the simulation efficiency by 2 orders of magnitude.The proposed method is more suitable for scattering problems in electrically large cavities and complex scenarios.
