Dec 1, 2012 · In this paper, an efficient GPU implementation of the 3D-DDA algorithm is proposed, which effectively reduces such branch divergence and improves performance of the C∕S dose calculation...

3DDDA是一个算法（前面的3.是章节！ ），实际是3D-DDA这样拆分。 它解决了这么个问题：我们的regular grid显然不可能与每个voxel做交，我们需要高效的判断出哪些voxel会与光线相交。 熟悉 光栅化 原理的朋友肯定可以联想到这就是2D画线算法（DDA/Bresenham）的3D版本。 3DDDA也就是DDA的3D版本。 回顾一下DDA，其计算了一个单位增量，（以斜率绝对值小于1情况为例）该增量沿着直线方向使得x每步进1，然后给离y最近的像素画上；结果是x轴每个单位 …

Nov 1, 2021 · In this study, an explicit three-dimensional discontinuous deformation analysis (3D-DDA) is parallelized. Using explicit contact force circumvents the open-close iteration and makes the global stiffness matrix block-diagonal.

In this paper, an efficient GPU implementation of the 3D-DDA algorithm is proposed, which effectively reduces such branch divergence and improves performance of the C∕S dose calculation programs running on GPU.

Mar 15, 2025 · In this study, aiming at the continuous-discontinuous simulation of 3D-DDA, a highly efficient contact detection strategy is proposed. The GDS method is embedded in 3D-DDA to deal with intricate contact scenarios.

Jul 23, 2015 · The three-dimensional discontinuous deformation analysis (3D-DDA) is a promising numerical method for both static and dynamic analyses of rock systems. Lacking mature software, its popularity is far behind its ability.

Jun 1, 2022 · Three-dimensional discontinuous deformation analysis (3D-DDA) is a powerful deformable discrete element method that is derived from the principle of minimum potential energy.

Nov 29, 2012 · The three-dimensional digital differential analyzer (3D-DDA) algorithm is a widely used ray traversal method, which is also at the core of many convolution/superposition (C/S) dose calculation approaches.

In this paper, an efficient GPU implementation of the 3D–DDA algorithm is proposed, which effectively reduces such branch divergence and improves performance of the C/S dose calculation...

The Digital Differential Analyzer (DDA) algorithm, adapted to 3D, is exactly the thing one needs to travel along a line (or a ray) through a grid of voxels.