Apple Motion 5.1.1 - Manual (Page 534)

Chapter 14 Particles 534
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Frequency: This slider, available when Wave is chosen in the Shape pop-up menu, defines the
number of waves. Higher values result in more waves.
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Phase: This dial, available when Wave is chosen in the Shape pop-up menu, defines the
degrees of the offset of the waves from the start and end points of the path. When set to 0
degrees (default), the wave begins and ends at half the distance from the highest point to the
lowest point in the wave. When set to 90 degrees, the wave begins and ends at the highest
point in the wave. When set to 90 degrees, the wave begins at the lowest point in the wave.
When set to 180 degrees, the waves are the same as 0 degrees, but inverted.
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Damping: This slider, available when Wave is chosen in the Shape pop-up menu, determines
the direction of progressive diminishment of the oscillation of the wave. Positive damping
values diminish the wave forward (from left to right); negative values diminish the wave
backward (from right to left).
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Offset: This slider becomes available when any of the following is chosen in the Shape pop-up
menu: Line, Rectangle (with Arrangement set to Outline), Circle (with Arrangement set to
Outline), Burst, Spiral, Wave, Geometry, or Image. This parameter offsets the emitter itself or the
particles generated on the shape. For example, when the emitter Shape is a Line, changing the
Offset value moves the emitter’s position in the Canvas. When the emitter Shape is a Rectangle
and Pattern is set to Outline, changing the Offset value moves the particles along the edge of
the shape.
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3D: When this checkbox is selected, the 3D emitter shapes (Box and Sphere) become available.
Because all emitter shapes can be used in 3D space, additional 3D parameters are available for
all emitter shapes when the 3D checkbox is selected: Render Particles, Emission Latitude, and
Emission Longitude. These additional parameters appear in the Emitter Inspector and HUD.
These parameters are available for all shapes, regardless of the Arrangement setting.
Note: When the 3D checkbox is selected, particles cannot receive reflections, and the
Reflections parameter (in the Properties Inspector) is no longer available for the emitter.
Additionally, when the 3D checkbox is selected, In Global 3D (Better) must be selected from
the Render Particles pop-up menu for particles to cast shadows and to be affected by lights.
For more information on the additional 3D controls in the HUD, see
Emitter HUD controls on
page 522.
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Emission Angle: This dial, available when the Shape pop-up menu is set to a 2D shape, sets
the direction in which particles travel. This parameter works in conjunction with the Emission
Range parameter. It is equivalent to one of the functions of the graphical emission control in
the Emitter HUD.
Note: When using an emitter shape other than a Point, such as a Line, Circle, Rectangle,
Spiral, Burst, or Wave, and Outline is chosen from the Arrangement pop-up menu, setting the
Emission Angle parameter to 180 degrees and the Emission Range parameter to 0 degrees
restricts the emission of particles to the inside of the shape. Setting the Emission Angle
parameter to 0 degrees and the Emission Range parameter to 0 degrees restricts the emission
of the particles to outside of the shape.
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Emission Range: A dial that restricts the area around the center of each emission point where
particles are generated, in the direction of the Emission Angle. It is equivalent to one of the
functions of the graphical emission control in the Emitter HUD.
Note: When using a Line, Circle, Rectangle, Spiral, Burst, or Wave (but not Geometry) shape,
setting the Emission Range parameter to 0 degrees keeps particles perpendicular to the
emitter when they emerge.
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