Type & Text

Introduction

A library of After Effects expressions to be used for sourceText property of a Text Layer.

Repetition

Repeat input string

repeat()

n = 10; // number to times to repeat
value.repeat(n)

for-loop

vertical

Text Grid - Uniform Repetition

repeat()

Explicit

var s = value;  // Source text
var numColumns = 5;  // Number of columns
var numRows = 10;  // Number of rows

var row = s.repeat(numColumns) + "\r";  
row.repeat(numRows);

Concise

(value.repeat(5) + "\r").repeat(10);

For-loop

Text Grid - Multiple Line Repetition

This code splits a comma-separated string into an array, then formats it into a text block with rows and columns by repeating each item with added prefixes and suffixes.

For Loop

const str = value;
const strArr = str.split(",");
const prefix = ""; 
const suffix = " ";
const numColumns = 5;
const numRows = 10;

let result = "";

for (let i = 0; i < numRows; i++) {
    const eleIndex = i % strArr.length;
    result += (prefix+strArr[eleIndex]+suffix).repeat(numColumns) + "\r"; 
}

result;

repeat()

Text Grid - Number Sequence

This code creates a string of sequential numbers between a start and end range. The numbers are arranged in rows and columns, and each number can have leading zeros and spaces after it.

//user variables
var startNum = 0;
var maxNum = 200;
var numCol = 10;
var numZero = 2;
var numSpace = 1;

var s = "";


for (var i = 1; i <= maxNum; i++) {
    // add startNum 
    var n = startNum + i - 1;

    // add zeroes
    for (var j = 1; j <= numZero; j++) {
        if (n < Math.pow(10, j)) s += 0
    }
    // add number to string
    s += n;

    // add spaces 
    for (var j = 0; j < numSpace; j++) s += ' '

    // add line break 
    i % numCol == 0 ? s += '\n' : s

}

Text Grid - Random Letter

This function generates a grid of random letters, and the user specify the total number of letters and letters per row.

function genLetter() {
    r = random(65, 90); //from a to z
    return String.fromCharCode(r);
}

function randAlphabet(maxNum, col, seed) {
    seedRandom(seed, true);
    var s = "";
    for (i = 1; i <= maxNum; i++) {
        s += genLetter() + ' ';
        if (i % col == 0) s += '\n'; // add line break
    }
    return s
}
randAlphabet(500, 25, 1)

Text Grid - Random Binary

1

function binary(maxNum, col, seed) {
    seedRandom(seed, true);
    var s = "";
    for (var i = 1; i <= maxNum; i++) { 
        s += Math.round(random()) + ' ';
        if (i % col == 0) s += '\n'; 
    }
    return s;
}

// Usage
binary(500, 25, 1);

2

---

Randomization

Random Letter

Solution 1

// User Input
var numOfLetters = 10; // Modify the number of letters to generate
var useSpaces = true; // Modify to include spaces between letters (true) or not (false)
var changeEveryFrame = false; // Modify if the generated letters should change every frame

// Don’t modify below this line
seedRandom(index, !changeEveryFrame);

function genLetter() {
  var r = random(65, 90); // Generate a random number representing a letter (ASCII code for A to Z)
  return String.fromCharCode(r); // Convert the number to the corresponding letter character
}

var result = "";
for (var i = 0; i < numOfLetters; i++) {
  result += genLetter();
  if (useSpaces) {
    result += " "; // Add a space between letters if useSpaces is true
  }
}
result; 

//source: https://creativecow.net/forums/thread/random-letters-4/

Solution 2

Random Digit

seedRandom(10,true);
Math.round(random(9));

---

String Manipulation

Search and replacing string instances

var searchString = /\r/g; // \r: lien break; \g: global flag
var replaceString = "newString";
value.replace(searchString, replaceString);

Parsing Text

Sourcetext from Comp Name

// if comp name is "comp_05", to get number use this
thisComp.name.split("_")[1] // replace delimiter based on your needs

Separating source text line feeds into an array

// Method 1 
txt = thisComp.layer("insert Text").text.sourceText;

txt.split("\r")[3]; // Regex


// Method 2:using name as index
txt = thisComp.layer("insert Text").text.sourceText;
myIndex = thisLayer.name;

txt.split("\r")[myIndex];

Number from comp name

myNum = parseInt(thisComp.name.split(" ")[1],10);

Numbers

Rounding numbers

to integer

// Use any of the following
Math.floor(value);
Math.ceil(value);

pow

toFixed

Round up if above threshold

function roundSpecific(num,thres){
    dec = num - Math.floor(num)
    if(dec>=thres) {num = Math.ceil(num);
}
return num
}
// usage 
roundSpecific(385.96,.9)

Counter

startTime = 0
endTime = 2;
startNum = 0;
endNun = 10000
linear(time,startTime,endTime,startNum,endNum);

Dates

Current date

D = new Date(Date(0));
“” + D.getDate() + “/” + (D.getMonth()+1) + “/” + D.getFullYear()

// get year
D = new Date(Date(0));
D.getFullYear()

// get month 
D = new Date(Date(0));
D.getMonth()+1

// get day
D = new Date(Date(0));
 D.getDate()

Expressions selector

Recommended readings

• WorkBench 34: Expression Selector Intro

Default

selectorValue * textIndex/textTotal

Alternating Effector

if(textIndex%2) -100; else 100

Random position from textIndex

seedRandom(textIndex,true);
random([100,100]);

Select text indexes explicitly; e.g. 1, 3, 7, 14, 22, etc.?

If you don't have a lot of numbers, then this works:

if(textIndex === 1 || textIndex ===3) {
 100;
} else {
 0;
}

If you do have a ton of numbers, then this works:

i = [1,3,5,7,10,11];
inArray(i);

function inArray(obj) {
 b = 0;
 for(i = 0; i < obj.length; i++) {
  if(obj[i] === textIndex) {
   b = 100;
   break;
  }
 }
 return b;
}

Sin wave effector [source]

freq = .5;
selectorValue*Math.sin(time*freq*Math.PI*2 + Math.PI*2* textIndex/textTotal)

Basics

// getting the character count
l = thisComp.layer("your text layer").text.sourceText.length;

// getting word count 
l = thisComp.layer("your text layer").text.sourceText;
wordsCount = l.split(/ ,| | \./).length;



// Matching text with regex
thisComp.layer("text").text.sourceText.toLowerCase().match(/\w+\./))

// includes() — determines whether a string contains the characters of a specified strin
var str = "Hello world, welcome to the universe.";
var n = str.includes("world");

Utility Functions

Find Number of Layers that includes string

function findLayerbyName(str) {
    var n = thisComp.numLayers;
    var numMattes = 0;
    for (i = 1; i <= n; i++) {
        thisComp.layer(i).name.includes(str) == 1 ? numMattes += 1 : 0;
    }
    return numMattes
}

findLayerbyName("matte")

Expression Selector (Regex)

https://forums.creativecow.net/thread/227/41461
Oleg Pirogov
https://dribbble.com/zeplin

var t = text.sourceText;
var regex = /\d[a-z]+(?=,)/g;

function indexMatched(index){
var matched = false;
var match;
var i=[];

while ((match = regex.exec(t)) !== null){
matched |= match.index<index & index<match.index+match[0].length;
i.push([match, match.index, match.index+match[0].length]);
}
return matched;
}

indexMatched(textIndex-1) ? 100 : 0;

Words inside parentheses

var t = text.sourceText;
var regex = /\(([^)]+)(?=\))/g;

function indexMatched(index){
var matched = false;
var match;

while ((match = regex.exec(t)) !== null){
matched |= match.index<index & index<match.index+match[0].length;
}
return matched;
}

indexMatched(textIndex-1) ? 100 : 0;

Hexcode

var t = text.sourceText;
var regex = /[A-Fa-f0-9]{6}/g;

function indexMatched(index){
var matched = false;
var match;

while ((match = regex.exec(t)) !== null){
matched |= match.index<index & index<=match.index+match[0].length;
}
return matched;
}

indexMatched(textIndex) ? 100 : 0;