The CATT 3D-viewer is a small stand-
alone application that can be used for enhanced 3D-viewing ofCATT-Acoustic
models as well as customer presentations.
color surface coding (actual color, absorption coefficient,
scattering coefficient, specularity, diffusitivity for each octave)
WAV-file playing in walkthroughs
animated viewpoint transitions
viewpoint lists that can be saved and loaded for
source viewpoints allowing for interactive aim and
positioning while viewing through -3, -6 and/or -9 dB contours.
interactive plane sub-division selection
and data readout (plane name, absorption and scattering coeffiicients,
interactive plane list selection for pasting
into CATT-Acoustic plane
selection (Free from edit dialogs, e.g. for selection of Audience
on/off selection of all elements: surfaces, edges,
source-items (id, coord system, aim, box), receiver-items (id, coord-system
head direction, sphere), lamps, coordinate system, palette, viewpoints
elements can be individually colored
the viewer requires OpenGL 1.1 to be installed on your system
(preinstalled on all Windows versions except 95 OSR1 but can
then be downloaded for free from http://www.opengl.org). An advantage with OpenGL
3D graphics is that it will automatically make use of hardware 3D support
if the card installed supports OpenGL. Note that many cheap
3D cards for games may only support Direct3D and not an Installable
Client Driver (ICD) for OpenGL. However, also without hardware
acceleration the generic OpenGL 1.1 renderer is very fast
and for normal use of the CATT 3D-Viewer no acceleration is necessary.
for anyone that needs to view CATT
OGL, v8 PLT and v9 PL9-files without a CATT-Acoustic license or demo the standalone viewers can be downloaded.