Unity technical manual - limit velocity over lifetime sub module and inherit velocity sub module

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Premise

This is what Xiao Kong insisted on writing Unity Novice series , Welcome to taste .

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The particle section is a series of articles , And the introduction was very detailed , Suggest Collection .

Practice process

Life cycle speed limit （Limit Velocity Over Lifetime） Sub module

Separate Axes： Split the shaft into separate X、Y and Z component . When Dampen Not for 0 Is useful when

Speed： Set the speed limit of particles ,xyz The same value , When Dampen Not for 0 Is useful when .

Space： Choose whether the speed limit applies to local space or world space . Only if Separate Axes when , This option is only available .

Dampen： When the particle velocity exceeds Speed or Separate Axes When setting the speed limit value , The rate at which the particle velocity decreases .

Drag： Apply linear resistance to particle velocity .

Multiply by Size： When this property is enabled , Larger particles are more affected by the drag coefficient .

Multiply by Velocity： When this property is enabled , Faster particles are more affected by the drag coefficient .

The above attribute values basically support constant values , Curve change , Numerical range , Hyperbolic interval value .

Speed inheritance （Inherit Velocity） Sub module

The premise of using this module is that 【Simulation Space- Simulation space 】 by World The world .

Use scenarios such as automobile exhaust , Rocket exhaust , Steam engine steam these effects , When cars and rockets accelerate , The tail gas should also be produced with a little acceleration . This attribute is useful for moving objects to emit particles .

Mode： Specifies how the emitter velocity is applied to particles , Two options are available ,Current Indicates that the current velocity of the emitter will be applied to all particles at each frame . for example , If the transmitter decelerates , All particles will also decelerate .Initial Represents the speed at which each particle is born to apply the emitter once . Any change in the velocity of the emitter after a particle is born will not affect the particle .

Multiplier： The proportion of the emitter velocity that the particle should inherit .

You can also use curves to influence the effect over time . for example , Strong suction can be applied to newly created particles , Reduce the suction over time . This may be useful for steam train smoke , Because steam train smoke will drift slowly over time and stop following the train after it is sent out .

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author ： Xiaokong and Xiaozhi Xiaokong
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