20221117-优设笔记

AE 随机表达式

wiggle(2,30)  频率 抖动范围



seedRandom(index,1)

x = Random(30,100);

[x,x]

seedRandom(index,1)
random(0,360) + time*36 


// 位置属性

seedRandom(index,1)

x=random(0,1920)
y=random(0,1080)
[x,y]


// ----  随机循环表达式

freq = 2; 频率

amp = 500;
loopTime = 3
t= time%loopTime;

wiggle1 = wiggle(freq,amp,1,1.05,t)
wiggle2=wiggle(freq,amp,1,1.05,t-loopTime);

linear(t,0,loopTime,wiggle1,wiggle2)

// cycle 

loopOut(type="cycle",numKeyframes=0);
loopOut(type="pingpong",numKeyframes=0);
loopOut(type="offset",numKeyframes=0);


// 路径循环表达式

valueAtTime(time%key(numKeys).time)

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