CEIG16

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https://diglib.eg.org/handle/10.2312/2630887

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Browsing CEIG16 by Subject "I.3.3 [Computer Graphics]"

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    Deployment of Volume Rendering Interactive Visualizations in Web Platforms With Intersected 3D Geometry
    (The Eurographics Association, 2016) Arbelaiz, Ander; Moreno, Aitor; Kabongo, Luis; Alejandro Garcia-Alonso and Belen Masia
    Volume rendering is a visualization technique focused in volumetric datasets, which requires a great amount of computational power and memory resources. This situation is even more severe when HTML5 and WebGL implementations are used in ubiquitous platforms to render the virtual scene. This paper presents a WebGL based volume rendering algorithm to support 3D geometries (provided as a set of 3D triangles) inside the volumetric datasets. Implementation details to achieve interactive rates along the volume rendering methods are also discussed.
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    Ordering Triangles in Triangulated Terrains Over Regular Grids
    (The Eurographics Association, 2016) Alonso, Jesús; Joan-Arinyo, Robert; Alejandro Garcia-Alonso and Belen Masia
    In this work we report on a set of rules to visit triangles in triangulated height fields defined over regular grids in a back-to- front order with respect to an arbitrary viewpoint. With the viewpoint, we associate an axis-alligned local reference framework. Projections on the XY plane of the local axis and the bisector of the first and third quadrants define six sectors. Specific visiting rules for collections of triangles that project on each sector are then defined. The experiments conducted show that the implementation of a simple algorithm based on the set of visiting rules defined allows real time interaction when the viewing position moves along an arbitrary 3D path.