caa a22 4500 605541124 CHVBK 20210128100914.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s00371-014-0995-5 doi (NATIONALLICENCE)springer-10.1007/s00371-014-0995-5 Real-time accumulation of occlusion-based snow [Elektronische Daten] [D. Reynolds, S. Laycock, A. Day] This paper describes a technique to allow the real-time simulation of snowfall accumulation in a dynamic 3D environment. The implementation maps surface-bound accumulation buffers to each object in the scene, forming height-maps of accumulated snow cover. The environment is rendered from above similar to the way shadow mapping is typically produced. However, unique buffer IDs and texture co-ordinates are output within each pixel of the render. A new technique for performing the mapping between buffers is proposed where a series of quads are rendered, one per pixel of the occlusion projection, to map directly visible surfaces to their corresponding accumulation height-map. Blurring is performed on the maps and per-pixel detail is given by procedurally generated normal maps of each surface updated frame by frame. Additional detail and shaping is performed using view-dependent tessellation and the snow surface is created by re-colouring and offsetting the existing scene geometry. This is the first implementation of snow simulation which allows persistent accumulation on a dynamic, moving scene in real-time. Springer-Verlag Berlin Heidelberg, 2014 Real-time simulation nationallicence Real-time rendering nationallicence Computer graphics nationallicence Snow simulation nationallicence Snow accumulation nationallicence Reynolds D. University of East Anglia, Norwich Research Park, NR4 7TJ, Norwich, UK aut Laycock S. University of East Anglia, Norwich Research Park, NR4 7TJ, Norwich, UK aut Day A. University of East Anglia, Norwich Research Park, NR4 7TJ, Norwich, UK aut The Visual Computer Springer Berlin Heidelberg 31/5(2015-05-01), 689-700 0178-2789 31:5<689 2015 31 371 https://doi.org/10.1007/s00371-014-0995-5 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00371-014-0995-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Reynolds D. University of East Anglia, Norwich Research Park, NR4 7TJ, Norwich, UK aut NATIONALLICENCE 700 1- Laycock S. University of East Anglia, Norwich Research Park, NR4 7TJ, Norwich, UK aut NATIONALLICENCE 700 1- Day A. University of East Anglia, Norwich Research Park, NR4 7TJ, Norwich, UK aut NATIONALLICENCE 773 0- The Visual Computer Springer Berlin Heidelberg 31/5(2015-05-01), 689-700 0178-2789 31:5<689 2015 31 371