imodelui - room image model visualization with user-interface.
imodelui provides a user interface for imodel. The SX, SY, and SZ sliders
control source location (note: the source can be placed outside of the room).
The XP-ZN sliders control the location of the walls. The first letter of the
slider label indicates the axis; the second letter indicates the positive (P)
or negative (N) side of the axis. This convention is used for labeling the
reflections as well. The V, Z, and U (see below) check boxes enable and
disable the display of mirror rooms ([1], Fig.1).
In the 3D-plot, the sound source is denoted by an 'x'. 1st-order reflections
are displayed using red lower-case letters, 2nd-order using blue. Mirror
rooms are dotted. The command-line lists the image locations by reflection
label (D = 'direct path', aa (1st-order) and aabb (2nd-order) = surface(s)
reflected off of).
The following terms are defined to aid in visualization (the first letter
is chosen to roughly resemble the sound path):
V-type = 1st-order reflection, labeled aa
Z-type = 2nd-order reflection, parallel walls, labeled aPaN and aNaP
U-type = 2nd-order reflection, orthogonal walls, labeled aabb (aabb is
equivalent to bbaa, i.e., the algorithm doesn't know which wall
was encountered first)
To rotate axes and zoom, use the Figure Toolbar (see the Figure dialog View
menu).
Reference:
[1] J. Allen and D. Berkley, "Image method for efficiently simulating
small-room acoustics", JASA 65(4), 1979.
See Also: imodel.m, imodelab.m, imodel_cb.m, imodel_h.m