Initial velocity animation changes the initial speed of a particle at time of emission.
Initial velocity is the speed instantaneously inherited when a particle is emitted from a particle emitter. If there is no effect of an external force, such as gravity, the particle will maintain this initial velocity as it moves.
You can configure Spread Out from Y Axis from the Speed item on the particle set panel. Causes particles to spread out horizontally outwardly from the central (Y) axis of the particle emitter.
You can specify the speed at which particles spread out from the Y axis. Speed is only applied in the X-Z plane.
Use the following parameters to configure Spread Out from Y Axis.
Parameters | Description |
---|---|
Speed | Specifies the speed at which particles spread out from the Y axis. |
The figure below shows how particles spread out from the Y axis for a point-shaped emitter.
You can configure Spread Out from Origin from the Speed item on the particle set panel. Causes particles to spread out from the emitter origin.
You can specify the initial speed at which particles spread out from the emitter origin. The direction of emission will differ depending on the emitter shape.
The emission directions for each emitter shape are as follows.
Emitter shape | Emission direction |
---|---|
Point | All directions |
Disc | Horizontal |
Sphere | Outwards from sphere surface |
Cylinder | Outwards from the cylinder face (though not from the cylinder ends) |
Rectangle | Horizontal |
Cube | Outwards from the inside of the cube |
Use the following parameters to configure Spread Out from Origin.
Parameters | Description |
---|---|
Speed | Specifies the speed at which particles spread out from the origin. |
The figure below shows how particles spread out from the origin of a disc-shaped emitter.
You can configure Random Direction from the Speed item on the particle set panel. You can randomly change the initial direction and speed of a particle at the time of emission.
Randomly changes a particle's direction and speed. Use this to emit multiple particles in random directions, much as for Spread Out from Origin.
Use the following parameters to configure Random Direction.
Parameters | Description |
---|---|
Speed | Specifies the initial speed. |
You can configure Specified Direction from the Speed item on the particle set panel. Specifies the initial direction and speed of a particle at the time of emission.
Gives a particle a specific direction and speed.
Use the following parameters to configure Specified Direction.
Parameters | Description |
---|---|
Direction: | Specifies the direction of movement. |
Speed | Specifies the initial speed. |
The figure below shows a direction (X, Y, Z = 1, 1, 0) and speed (0.1) applied to a particle after emission from an emitter.
You can configure Random Direction from the Speed item on the particle set panel. Particles can be made to spread out.
By setting a random value for the angle, you can make particles spread out in random directions from within the area of the conical shape versus the direction of advance of particles.
Parameters | Description |
---|---|
Direction: | Specifies the direction of movement. |
Speed | Specifies the initial speed. |
Random angle | Randomly specifies the angle at which a particle should spread versus the direction of advance of the particle. |
The figure below shows the direction (X, Y, Z = 1, 1, 0), speed (0.1) and random angle (45) applied to the particle after emission from an emitter.
You can configure Randomize Results from the Speed item on the particle set panel. Randomness can be applied to the instantaneous speed (initial velocity) when a particle is generated from a emitter.
Randomizes the speed of particles after emission by factoring with a random value.
Result Speed ± (Random Number × Result Speed)
Use the following parameters to configure Randomize Results.
Parameters | Description |
---|---|
Amplitude (%) | Specifies the random number ratio (0.5 in the formula) |
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