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Emitter Setting
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Emit On/Off
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You may define when the emitter starts to emit and when to stop by clicking the
On/Off buttons in the Emitter Setting
section. Once you click any one of the two buttons, you set an Emit key
on the timeline. Therefore, one emitter is able to send particles intermittently.
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Quota
&
Emit Rate
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Quota - This defines how many particles are
provided when the
project plays back. Once the amount of the particle
alive hits the number of Quota, the emitter pauses to send off particles.
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Emit Rate - This enforces the emitter to eject specified number of
particles per second.
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Emit Volume
&
Position |
Please keep in mind first that
there is an invisible cube container in which emitters distribute averagely.
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Emit Volume - There are three parameters which modify the
dimension of the container. Since the emitters spread averagely within this
container, they can create an illusion that the volume of the particles
is increased.
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Position - These X-Y-Z parameters move the cube of emitters to a specific
position in your project.
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(100, 100, 100)
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(0, 100, 100)
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(100, 0, 100)
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(100, 100, 0)
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Direction
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With the idea of longitude and latitude
system, the emitter obtains the direction for sending off the particles.
Please notice that the effect can be observed when the
Velocity parameter increases.
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Longitude - This value decides the degree of the angle on the
floor. 0 degree sets the direction along the positive X-axis. The range
is from -180 to 180 degrees.
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Latitude - This value lifts up/push down the direction to the
north/south pole. The range is from -90 to 90 degrees in which 90
degrees set the direction to up.
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(0, 0)
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(90, 0)
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(-135, 0)
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(0, 90)
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(0, -45)
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Spread
&
Diagonal
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To understand these two parameters, you
must think of a pyramid in your mind first. The top of the pyramid is the
position for the emitter and it ejects particles straight to the bottom of
the pyramid.
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Spread - This value decides the angle of the two opposite sides
(the red and green lines in the illustration as Diagonal equals to 0)
of the pyramid. The range is from 0 to 180.
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Diagonal - This value specifies the rotation angle of the diagonal line
(the blue line in the illustration) of the pyramid bottom. The range is also from 0 to 180. Please notice
that the area will be maximized when the Diagonal is set to 45
and 135 degrees.
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Diagonal = 0 degree
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Diagonal = 45 degrees
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Diagonal = 90 degrees
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"Diagonal
value changes from 0 to 90 degrees"
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Velocity
&
Direction Randomness
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Direction Randomness - Initially, each particle moves along a path of a
fixed straight line. This attribute distorts this line so the particles move
individually along different distorted lines. The range is from 0 to
359. Each particle slightly changes its direction randomly in accordance
with the angle from x, y and z axis. It is useful when you want
the particles to
imitate the motion of the snow or falling leaves.
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Direction Randomness = 0
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Direction Randomness = 30
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