Visualization with help from SCV Erik Brisson Boston University Scientific Computing and Visualization

BU Scientific Computing and Visualization 2 How can we help? What software / viz tools to use Managing data Understanding problems Use of color, scale, etc Making animations Programming Data transfer Data conversion Custom / specialized tools

BU Scientific Computing and Visualization 3 Packages we support Mathematics and Data Analysis Mathematica MATLAB IDL Scientific Visualization VTK (Paraview) Modeling, Rendering, and Animation Maya OpenGL (OpenSceneGraph) Image Tools ImageMagick

BU Scientific Computing and Visualization 4 R.I.P. SGI (NAG) Explorer, AVS, OpenDX

BU Scientific Computing and Visualization 5 Example math / analysis package (IDL) ; File: fit_xy.pro N = 10 xy = fltarr(2,N) openr, 1, 'dat/ex_xy.dat' readf, 1, xy close, 1 x = xy(0,*) y = xy(1,*) print, 'x' print, x print, 'y' print, y plot, psym=1, x, y ypoly = poly_fit(x, y, 3) yapprox = ypoly(0) + ypoly(1)*x + ypoly(2)*x^2 + ypoly(3)*x^3 print, 'yapprox' print, yapprox oplot, x, yapprox end

BU Scientific Computing and Visualization 6 Output from IDL program

BU Scientific Computing and Visualization 7 Plot from IDL program

BU Scientific Computing and Visualization 8 More from IDL

BU Scientific Computing and Visualization 9 VTK (Visualization Tool Kit) Open source software C++ class libraries Tcl/Tk, Java, Python interface layers Supports scalars, vectors, tensors Supports specialized modeling and visualization techniques

BU Scientific Computing and Visualization 10 Paraview

BU Scientific Computing and Visualization 11 Paraview

BU Scientific Computing and Visualization 12 More general graphics software Maya OpenGL OpenSceneGraph

BU Scientific Computing and Visualization 13 Maya rendered: vortex shedding

BU Scientific Computing and Visualization 14 Maya rendered: Fan pressure

BU Scientific Computing and Visualization 15 Maya rendered: Fan entropy isosurface

BU Scientific Computing and Visualization 16 Virtual Environments

BU Scientific Computing and Visualization 17 What's in a virtual world? An environment Representations of physical objects Visual models Auditory elements Interactions with objects Representations of people - avatars Communication Gesturing Typing / chatting Telephony Video

BU Scientific Computing and Visualization 18 Our goal with DAFFIE Distributed, interactive virtual environment Distributed Interactive Visually and aurally rich Input (models, images and sounds) from variety of available tools Simple import method Script driven Accessible to non-expert users Extensible by programmers

BU Scientific Computing and Visualization 19 The DAFFIE event system Communication between agents

BU Scientific Computing and Visualization 20 darp scripts: arproom file arproom 2.0 name cart-models enter_xyz enter_hpr group_xyz group_hpr group_path../models/purple_cube/ group purple_cube.arpg group_xyz group_hpr group_path../models/blue_cube/ group blue_cube.arpg group_xyz group_hpr group_path../models/orange_sphere/ group orange_sphere.arpg end

BU Scientific Computing and Visualization 21 The DVD Wall Tiled, rear projected, passive stereo display system Based on commodity components