Unity technical manual - interference / noise sub module

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Premise

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

Novice （√√√）

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

Practice process

You can achieve the effect of turbulence for particles （ It can gather mosquitoes flying around , Or the motion picture of a male tadpole ）, Move back and forth , Consumption performance . The technical algorithm uses Curl Noise Technology , suffer Edit-Project Settings-Quality The setting of window type affects , If the selected render level is low , Good performance Noise Module reuse results in less dynamic and diverse , On the contrary, the selected rendering level is high , Poor performance but increased diversity .

Separate Axes- Separation shaft ： After activation, it can be controlled separately x Axis y Axis z Axis .

Strength- Strength ： A curve can be used to define how much noise affects particles in their life cycle . The higher the number is , The faster and farther the particles move . This value can be a curve, a constant, or a random hyperbolic interval and a double constant .

Frequency- frequency ： This attribute can control the frequency of the direction change of the particles and the sudden degree of the direction change （ For example, ten particles ）. Lower values produce a soft and smooth effect , In the actual experiment, you can see the process of the effect swinging back and forth , A high value will produce a rapid change effect , It is difficult for the naked eye to see the swinging process , Sudden Flashes come and go .

Scroll Speed- Rolling speed ： control Noise（ noise ） The moving speed of the graph , So as to realize more unstable, irregular and unpredictable particle movement trajectory .

Damping- damping ： Xiaokong doesn't know the actual application , The official explanation is that when this attribute is enabled , Intensity is proportional to frequency . Tying these values together means that the noise field can be scaled while maintaining the same behavior but with different sizes .

Octaves- Magnification ： The default is 1, It is recommended to keep the default for actual projects , Because the performance consumption will be doubled if the number is increased . This attribute roughly means default Noise The module uses 1 A noise map , If the magnification is not 1 Just a few noise maps . Think about how a piece of paper would have worked , If you use it N A piece of paper to do , The performance must be poor .

Octive Multiplier- Multiplier ： When Octaves Property is not 1 When enabled , Represents the result of multiplying each noise graph . and Octaves Properties are the same, and performance consumption is basically unnecessary .

Octave Scale- Magnification scaling ： When Octaves Property is not 1 When enabled , Represents the result of multiplying each noise graph . and Octaves Properties are the same, and performance consumption is basically unnecessary .

Quality- quality ： Three options are available - Low, medium and high , The higher the height, the more particle turbulent motion effect trajectories , On the contrary, the trajectory decreases . Can significantly reduce performance , The performance is reduced and the noise effect is much worse , After all, you can't have both performance and effect .

Remap- Remap ： Xiao Kong hasn't learned yet , I haven't used it very much , You are welcome to point out the maze . When this attribute is activated, it will add Remap Curve Polyline operation attribute ,

Position Amount- Position measurement ： Used to control the magnitude of the effect of noise on the position of particles , The bigger the value is. , The larger the particle's swing trajectory . The default is 1.

Rotation Amount- Rotation ： Used to control the noise on the particle rotation amplitude （ How many degrees per second ）, Larger particles spin faster . The default is 0.

Size Amount- Dimension ： Used to control the magnitude of particle size , The larger the particle size, the larger the particle size .

Amount Three attributes can be used properly to achieve the flower revealing effect 、 Seafloor bubble breathing bubble effect 、 The effect of boiling and bubbling .

other

author ： Xiaokong and Xiaozhi Xiaokong
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