TransCut: Interactive Rendering of Translucent Cutouts

TransCut: Interactive Rendering of Translucent Cutouts
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TransCut:半透明切口的交互式渲染

DOI:
10.1109/tvcg.2012.127
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发表时间:
2013-03
影响因子:
5.2
通讯作者:
任重
任重
中科院分区:
计算机科学1区
文献类型:
--
作者:
任重

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我们提出了TransCut,一种技术进行压裂和切割操作的半透明物体的交互式渲染。当物体断裂或切开时,用户可以直接检查并直观地了解复杂的半透明内部,以及通过在横截面上绘画和重新组合断裂部分来编辑材料属性-所有这些都具有即时和逼真的视觉反馈。这种与半透明体交互的新模式是通过两项技术贡献实现的。第一个是四面体网格上扩散方程(DE)的新型求解器,其产生的高质量结果与Arbree等人[1]的最新有限元法(FEM)相当,但速度更高。这种精度和效率是通过计算扩散方程的离散发散和构造DE矩阵使用线性有限元导出的解析公式获得的。第二个贡献是一个多分辨率算法,显着加快我们的DE求解器,同时适应频繁变化的动态对象的拓扑结构。整个多分辨率DE求解器是高度并行的,并且很容易在GPU上实现。我们相信,TransCut为经历断裂和切割操作的异质半透明物体提供了一种新颖的视觉效果。
We present TransCut, a technique for interactive rendering of translucent objects undergoing fracturing and cutting operations. As the object is fractured or cut open, the user can directly examine and intuitively understand the complex translucent interior, as well as edit material properties through painting on cross sections and recombining the broken pieces-all with immediate and realistic visual feedback. This new mode of interaction with translucent volumes is made possible with two technical contributions. The first is a novel solver for the diffusion equation (DE) over a tetrahedral mesh that produces high-quality results comparable to the state-of-art finite element method (FEM) of Arbree et al. [1] but at substantially higher speeds. This accuracy and efficiency is obtained by computing the discrete divergences of the diffusion equation and constructing the DE matrix using analytic formulas derived for linear finite elements. The second contribution is a multiresolution algorithm to significantly accelerate our DE solver while adapting to the frequent changes in topological structure of dynamic objects. The entire multiresolution DE solver is highly parallel and easily implemented on the GPU. We believe TransCut provides a novel visual effect for heterogeneous translucent objects undergoing fracturing and cutting operations.
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