New techniques in 3D scalar and vector field visualization

Conference · Wed May 05 00:00:00 EDT 1993

OSTI ID:10170925

Max, N; Crawfis, R; Becker, B

At Lawrence Livermore National Laboratory (LLNL) we have recently developed several techniques for volume visualization of scalar and vector fields, all of which use back-to-front compositing. The first renders volume density clouds by compositing polyhedral volume cells or their faces. The second is a ``splatting`` scheme which composites textures used to reconstruct the scalar or vector fields. One version calculates the necessary texture values in software, and another takes advantage of hardware texture mapping. The next technique renders contour surface polygons using semi-transparent textures, which adjust appropriately when the surfaces deform in a flow, or change topology. The final one renders the ``flow volume`` of smoke or dye tracer swept out by a fluid flowing through a small generating polygon. All of these techniques are applied to a climate model data set, to visualize cloud density and wind velocity.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10170925
• Report Number(s): UCRL-JC-113517; CONF-9308128-1; ON: DE93016415; TRN: 93:017832
• Resource Relation: Conference: Pacific graphics `93,Seoul (Korea, Republic of),30 Aug - 2 Sep 1993; Other Information: PBD: 5 May 1993
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
54 ENVIRONMENTAL SCIENCES
CLOUDS
FLOW VISUALIZATION
GREENHOUSE EFFECT
COMPUTER CALCULATIONS
THREE-DIMENSIONAL CALCULATIONS
COMPUTERIZED SIMULATION
WIND
990200
540120
MATHEMATICS AND COMPUTERS
CHEMICALS MONITORING AND TRANSPORT