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"NASA Technical Reports Server (NTRS) 19970021350: Hierarchical And Parallelizable Direct Volume Rendering For Irregular And Multiple Grids" and the language of the book is English.


“NASA Technical Reports Server (NTRS) 19970021350: Hierarchical And Parallelizable Direct Volume Rendering For Irregular And Multiple Grids” Metadata:

  • Title: ➤  NASA Technical Reports Server (NTRS) 19970021350: Hierarchical And Parallelizable Direct Volume Rendering For Irregular And Multiple Grids
  • Author: ➤  
  • Language: English

Edition Identifiers:

  • Internet Archive ID: NASA_NTRS_Archive_19970021350

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"NASA Technical Reports Server (NTRS) 19970021350: Hierarchical And Parallelizable Direct Volume Rendering For Irregular And Multiple Grids" Description:

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A general volume rendering technique is described that efficiently produces images of excellent quality from data defined over irregular grids having a wide variety of formats. Rendering is done in software, eliminating the need for special graphics hardware, as well as any artifacts associated with graphics hardware. Images of volumes with about one million cells can be produced in one to several minutes on a workstation with a 150 MHz processor. A significant advantage of this method for applications such as computational fluid dynamics is that it can process multiple intersecting grids. Such grids present problems for most current volume rendering techniques. Also, the wide range of cell sizes (by a factor of 10,000 or more), which is typical of such applications, does not present difficulties, as it does for many techniques. A spatial hierarchical organization makes it possible to access data from a restricted region efficiently. The tree has greater depth in regions of greater detail, determined by the number of cells in the region. It also makes it possible to render useful 'preview' images very quickly (about one second for one-million-cell grids) by displaying each region associated with a tree node as one cell. Previews show enough detail to navigate effectively in very large data sets. The algorithmic techniques include use of a kappa-d tree, with prefix-order partitioning of triangles, to reduce the number of primitives that must be processed for one rendering, coarse-grain parallelism for a shared-memory MIMD architecture, a new perspective transformation that achieves greater numerical accuracy, and a scanline algorithm with depth sorting and a new clipping technique.

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  • Internet Archive Link: Archive.org page
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