Apple Motion 5.1.1 - Manual (Page 524)

Chapter 14 Particles 524
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Emission Latitude/Emission Longitude Control (3D only): When using a 3D particle emitter (when
the 3D checkbox is selected in the Emitter Inspector), the emission control of the HUD lets you
modify the Emission Latitude and Emission Longitude parameters.
Drag the sphere in the center of the circle to modify the emission direction (in degrees
latitude and longitude) of the particles. You can also enter specific values in the
Emitter Inspector.
Drag the Emission Range slider (above the sphere) to define the range of degrees at which
particles are generated. In other words, this control defines the size of the cone that the
particles fill when generated in 3D space.
Adjust a particle emitter and its cells in the Inspector
Emitter and cell parameters overview
Particle emitter and particle cell parameters, though closely related, serve different purposes.
Emitter parameters control the overall shape and direction of the animated mass of particles.
Other emitter parameters simultaneously modify the parameters of all cells inside that emitter.
Particle cell parameters control the behavior of particles after they’re generated by the emitter.
For more information, see
Cell parameters on page 536.
To open a particle system’s Emitter Inspector
1 Select an emitter object in the Layers list, Timeline, or Canvas.
2 In the Inspector, click Emitter (if the pane is not already displayed).
The contents of the Emitter Inspector are dynamic—different parameters appear depending on
the number of cells in the particle system, the emitter shape that’s used, and whether the 3D
checkbox is selected or deselected.
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