9

Sound VRML97 Helper 601
V isibility R ange—
Specifies the distance from the
viewer at w h ich objects are totally obscured by the
fog.Thesmallerthisvalueis,thecloserthefogis
to the camera, and the less your scene is visible.
Thelargerthisvalueis,themoreofyoursceneis
v isible to the camer a . A value of 0 turns off the
effect, making e verything in the scene visible. A
value of 0 m e ans that there is no fog effect.
Icon Size—Adjusts the size of the helper object in
the viewports.
Sound V RML97 Helper
Create panel > Helpers > VRML97 > Object Type rollout
>Sound
The Sound helper lets you place 3D (spatial) or
ambientsoundsinascene. Thesoundmaybe
locatedatapointandemitsoundinaspherical
or ellipsoid pattern. The ellipsoid is pointed in a
particular direction and may be shaped to provide
more or less directional focus from the location
of the sound. The sound node may also be used
to describe an ambient s ound that tapers off at a
specified distance from the sound node.
The red ellipsoid of the helper represents the
outermost range for which the sound can be
heard.Theblueellipsoidrepresentstherangeof
the m aximum strength of the sound. T he area
between the red and blue ellipsoids represents a
falloff area in which the volume varies in intensity.
The helper’ s arrow points in the direction toward
which the sound is emanat ing.
Note: The Sound helper object must be linked to
an existing audio clip in the scene. Therefore, you
must have an AudioClip (page 3–606) helper object
in the scene in order for the Sound helper to pla y.
Procedures
To crea te a S ound helper object:
1.
AddaSoundhelperbyclickingtheSound
button, then click-drag in the Top v iewport to
create its icon.
2. Press Pick A udio Clip and select an AudioClip
helper object in the scene.
3. Rotate the icon to determine the direction in
which the sound is emanated.
4. Use the controls to adjust the range and
strength of the playback sound.
Interfa ce
The Sound rollout contains the following options:
Intensity—Sets the loudness of the s ound. 1.0 is
full volume.
Prior it y—Sets the relative importance of the s ound,
ifyouhavemorethanonesoundinthesceneand
the browser cannot play all of them. 0 is least
important. 1 is most important.