
The range limiter box for
an oblong
Example 4: Creating an Oblong
This time select the
Shape FX
Ellipse
preset, and drag the top and
bottom handles so that the edges of the limiter box fall inside the
ellipse.
When you run that FX scene the fixtures will try to trace the
ellipse but will be restricted to all four edges of the limiter box,
and so will trace the shape of an oblong instead.
We have used the range limiter with
Shape FX
to modify the
preset shapes, but you can use the range limiter in a different way
to achieve even more effects
With
Shape FX
presets the shape is normally centred on the ‘reference’ pan & tilt positions recorded
in the original scene. This can be useful if you wish to ‘fix’ shapes to specific areas - such as spots
on a dance floor - with one fixture covering one area around its ‘fixed’ central point, and another
fixture covering another area etc.
However, you can use the
Pan FX
and
Tilt FX
presets in conjunction with
Shape FX
presets to
move
the shapes around a specific area instead. The range limiter box defines the area that the shapes will
move around in, and the rate of movement of the shape is defined by the
Pan FX
and
Tilt FX
Speed
fader settings.
Here’s an example:
1) Select the
Shape FX
Circle
preset and drag the centre handle to make the circle quarter-size.
2) Select the
Pan FX
Straight
and
Tilt FX
Straight
presets. A
Pan FX
Speed fader and
Tilt FX
Speed fader will then be accessible. These are used to set how fast the shape will move
around the area defined by the Range Limiter box. These speeds are relative to the
Shape FX
Speed. Slide both of these to
FL
to set the fastest speed.
3) Run the FX scene and you will see the fixtures moving around the range limit as they trace
the circles.
4) Select
Tilt FX
Random
and you will see the shapes moving between randomly picked tilt
positions but sweeping to and fro on the pan.
5) Select
Pan FX
Random
and the shapes will move between randomly picked pan and tilt
positions.
Now that you have learned the principles of the FX generator, experimentation should provide you
with plenty of effects and enable you to find the effect you require. To leave the FX generator panel
and return to the normal scene panel, simply click on the
Exit
button.
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