Direct Multifield Volume Ray Casting of Fiber Surfaces
Direct Multifield Volume Ray Casting of Fiber Surfaces
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DOI：
10.1109/tvcg.2016.2599040
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发表时间：
2017
影响因子：
5.2
通讯作者：
Kui Wu;A. Knoll;Benjamin J. Isaac;Hamish A. Carr;Valerio Pascucci
中科院分区：
文献类型：
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作者：
Kui Wu;A. Knoll;Benjamin J. Isaac;Hamish A. Carr;Valerio Pascucci
多字段数据在可视化中很常见。然而，将这些数据简化为可理解的几何图形是一个具有挑战性的问题。纤维表面是一种类似于二元体积数据的等值面，是一种很有前途的理解多场体积的新机制。在这项工作中，我们从体积数据中探索纤维表面的直接射线投射，而不需要任何显式的几何提取。我们直接沿着区域空间中的射线进行采样，并使用从控制多边形导出的带符号距离场在定义光纤的范围空间中进行几何测试。我们的方法只需要很少的预处理，可以实时探索数据，动态修改和像素精确渲染光纤表面，并支持域空间的高阶插值。我们在几个双变量数据集上演示了这种方法，包括多场燃烧数据的分析。
Multifield data are common in visualization. However, reducing these data to comprehensible geometry is a challenging problem. Fiber surfaces, an analogy of isosurfaces to bivariate volume data, are a promising new mechanism for understanding multifield volumes. In this work, we explore direct ray casting of fiber surfaces from volume data without any explicit geometry extraction. We sample directly along rays in domain space, and perform geometric tests in range space where fibers are defined, using a signed distance field derived from the control polygons. Our method requires little preprocess, and enables real-time exploration of data, dynamic modification and pixel-exact rendering of fiber surfaces, and support for higher-order interpolation in domain space. We demonstrate this approach on several bivariate datasets, including analysis of multi-field combustion data.