【Unity VFX】VFX Introduction notes to special effects

Catalog ：

One 、 Preliminary knowledge of layout

Two 、 Make - link - Ideas - summary

3、 ... and 、 Specific implementation steps

Four 、 Case download link

Effect display

One 、 Preliminary knowledge of layout

VFX Create the initial section interface , It is divided into 4 large .

1、 Show build control

2、 initialization

3、 Real time updates

4、 Render settings

Two 、 Make - link - Ideas - summary

        The whole production is divided into three parts ：

         1、 Basic particle control

         2、 Color change control

         3、Force Position and direction control

Formula of special effect production idea ：

          Particle shape , color >> Number of particles >> The life cycle of particles >>

3、 ... and 、 Specific implementation steps

•       Basic particle control

1、 Click on Edit Open the editing interface , Or in the resource directory , Double click the resource , It can also be opened .

2、 Select the particle base image , And set the particles to , Launch in direction .

3、 Particle number control , The maximum number of particles is One hundred thousand , The display particles are set to Ten thousand individual .

Particle life cycle control increased to 3  -  5 second

4、 Control particles , The display increment is overlay ,

If it is set to passageway , The following effects will appear .

5、 Color control ：

6、 Particle size and shape control .

here Scale Y Control particle length ,Size Control the overall size .

Here we will control the size of the original default curve , Delete control .

7、 Add circular motion range

here , In the initialization module , stay Position Choose from Torus shape , And select Custom, For the options that appear , The ring controls .

8、 Delete the particle fixed direction control of the initialization module , stay Update Add... To the module Force,Turbulence（ Disturb the position ） Control .

This is the time , Can be observed , The particle shape has changed .

9、 Add surround motion playback for special effects .

utilize Update Module ,Position（Torus） In the component Arc Sequencer Options , Go around .

So motion surrounds , Will use about time Time The node of .

Here in the blank area Create by space Periodic Total Time Options

In nodes 20 Set... For speed , The bigger it is , The slower you exercise , This node loops from 0-1 The cycle of .

•   Color change control    

1、 stay BlackBoard Create a public int Parameters , Control the number of particles in Range in （ Limit the maximum , Minimum value ）

Enable Value Slide bar Control the maximum and minimum values

2、 Expose a color control variable Gradient

Add a default color to the color control

3、 Initialization module , add to set Color Components

4、 Add gradient input method sample gradient , control set color Component for color gradient

5、 Expose a color control variable , And a time control variable   control , Gradient color change .

•  Force Position and direction control

attract Particles move somewhere

Quote formula ： Vector difference = Target location - Particle position .

1、 stay update Add a Force Field force

· take Force The field force mode is set to Relative.( Relative position ), Make us get XYZ Vector control in three directions .

2、 stay Blackboard Declare a Vector3 Vector of type （ Set as the target point to attract particles ）

3、 establish 《 Operator (operator)>> mathematics (Math)>> Geometric operations (Geometry)>> Change the coordinate system (Change Space), Position the particles , You need to change the coordinate system to the coordinate system of particle local space .

4、 Create a vector representing the position of the particle itself , establish 《 In nodes (node)>> The operator (Operator)>> attribute (Attribute)>> Search for (search)>> Get property location (Get AttriBute:position(Current))》

5、 Now we have the information of two locations , We need a Minus nodes , Create a... Based on mathematical operators

establish 《Node()>>operator()>>math()>>Arithmetic( Count )>>Subtract( Subtracting the )》

6、 From the particle to the target vector , These vectors are of different sizes , If you just subtract , We don't want particles to have different velocities , therefore , We will add another node , To standardize each vector .

I will filter for Standardization , This will be each direction vector , Become a size of 1 Unit vector of , Let's add up the strength .

Multiply by the top multiplier , Then link it back to speed .

stay BlackBoard Create floating point numbers Float, Floating point type variables == The default number is 10.

Create a normalization node normallize

Create a multiplication node 《Multiply》

Put the vector after normal speed , Multiply by the variable that controls the speed .

7、 Go back to the scene , Create a target object , And for the special effect object Add name is VFX Parameter Binder (VFX Parameter binding ) Of Components .

Select... In the script component + Number , And add transform>>Position.

After selection , Click on V Symbol , Select the name of the variable that controls the speed disclosed in the special effect , Specify the target object .

• Case download link ：

https://download.csdn.net/download/Allen7474/15403250