13个AE常用表达式：文本篇

(time*100).toFixed(0)+"%" 

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linear(time,0,2,1,100).toFixed(1)+"%"

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value = linear(time,0,2,1,100).toFixed(1);

"¥" + value

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timeToCurrentFormat(time)

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// 自定义起始时间（格式：小时、分钟、秒、毫秒）

startHours = 0; // 小时

startMinutes = 20; // 分钟

startSeconds = 0; // 秒

startMilliseconds = 0; // 毫秒

startOffset = startHours * 3600 + startMinutes * 60 + startSeconds + startMilliseconds / 100;

elapsedTime = time + startOffset;

hours = Math.floor(elapsedTime / 3600); 

minutes = Math.floor((elapsedTime % 3600) / 60); 

seconds = Math.floor(elapsedTime % 60); 

milliseconds = Math.floor((elapsedTime % 1) * 100); 

function padZero(num) {

return ("0" + num).slice(-2);

}

padZero(hours) + ":" + padZero(minutes) + ":" + padZero(seconds) + ":" + padZero(milliseconds);

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// 自定义起始时间（格式：小时、分钟、秒、毫秒）

startHours = 0; // 小时

startMinutes = 20; // 分钟

startSeconds = 0; // 秒

startMilliseconds = 0; // 毫秒

startTime = startHours * 3600 + startMinutes * 60 + startSeconds + startMilliseconds / 100;

elapsedTime = time + startTime;

hours = Math.floor(elapsedTime / 3600);

minutes = Math.floor((elapsedTime % 3600) / 60);

seconds = Math.floor(elapsedTime % 60);

milliseconds = Math.floor((elapsedTime % 1) * 100);

function padZero(num) { return ("0" + num).slice(-2); }

// 自定义格式

format = "hh:mm:ss:SS"; // 修改此变量以切换格式

output = format

.replace("hh", padZero(hours))

.replace("mm", padZero(minutes))

.replace("ss", padZero(seconds))

.replace("SS", padZero(milliseconds));

output;

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// 自定义起始时间（格式：小时、分钟、秒、毫秒）

startHours = 0; // 小时

startMinutes = 20; // 分钟

startSeconds = 0; // 秒

startMilliseconds = 0; // 毫秒

startTime = startHours * 3600 + startMinutes * 60 + startSeconds + startMilliseconds / 100;

remainingTime = Math.max(0, startTime - time);

hours = Math.floor(remainingTime / 3600);

minutes = Math.floor((remainingTime % 3600) / 60);

seconds = Math.floor(remainingTime % 60);

milliseconds = Math.floor((remainingTime % 1) * 100);

function padZero(num) { return ("0" + num).slice(-2); }

// 自定义格式

format = "hh:mm:ss:SS"; // 修改此变量以切换格式

output = format

.replace("hh", padZero(hours))

.replace("mm", padZero(minutes))

.replace("ss", padZero(seconds))

.replace("SS", padZero(milliseconds));

output;

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textContent = "Hello, After Effects!"; // 文本内容

chars = textContent.length;

speed = 14; // 每秒显示字符数

visibleChars = Math.min(chars, Math.floor(time * speed));

textContent.substr(0, visibleChars)

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data = ["广州", "青岛", "三亚", "杭州", "北京", "长沙", "新疆"];    // 自定义内容

stopText = "三亚";     // 停止时显示

stopTime = 2;     // 停止时间（秒）

if (time >= stopTime) {

output = stopText;

} else {

output = data[Math.floor(random(data.length))];

}

output;

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rows = 5; // 行数

cols = 5; // 列数

startValue = 100; // 基础数字

speed = 10; // 数字变化速度

randomFactor = 50; // 随机因子范围

s = "";

for (i = 0; i < rows; i++) {

for (j = 0; j < cols; j++) {

num = Math.round(

startValue +

time * speed +

i * j * 3 + 

random(-randomFactor, randomFactor)

);

s += num + " ";

}

s += "\n";

}

s;

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textContent = "A Password"; // 目标文本

randomChar = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; //随机文本

speed = 10; // 每秒显示字符数

chars = textContent.length;

visibleChars = Math.min(chars, Math.floor(time * speed));

result = "";

for (i = 0; i < chars; i++) {

if (i < visibleChars) {

result += textContent[i];

} else {

result += randomChar[Math.floor(random(randomChar.length))]; // 显示随机字符

}

}

result

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story = [

"从前有座山",

"山里有座庙",

"庙里有个老和尚和个小和尚",

"老和尚对小和尚说",

];

sentenceDuration = 1; // 每句的持续时间

currentSentence = Math.floor(time / sentenceDuration) % story.length;

story[currentSentence]

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lyrics = [

{ time: 0, text: "下雨天了怎么办" },

{ time: 3, text: "我好想你" },

{ time: 6, text: "不敢打给你" },

{ time: 9, text: "我找不到原因" }

];

currentLyric = "";

for (i = 0; i < lyrics.length; i++) {

if (time >= lyrics[i].time) {

currentLyric = lyrics[i].text;

}

}

currentLyric

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