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script.js
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const messages = ["TIM ", "ARIA ","CONNOR ", "JANE ", "MICELI "]
var pinkrain = 0;
var orangerain = 25
var yellowrain = 50;
var greenrain = 104;
var bluerain = 207;
var purplerain = 255;
var colorrain = greenrain;
var M = {
settings: {
COL_WIDTH: 20,
COL_HEIGHT: 25,
VELOCITY_PARAMS: {
min: 1,
max: 2
},
CODE_LENGTH_PARAMS: {
min: 3,
max: 20
}
},
animation: null,
c: null,
ctx: null,
lineC: null,
ctx2: null,
WIDTH: window.innerWidth,
HEIGHT: window.innerHeight,
COLUMNS: null,
canvii: [],
letters: ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '$', '+', '-', '*', '/', '=', '%', '"', '\'', '#', '&', '_', '(', ')', ',', '.', ';', ':', '?', '!', '\\', '|', '{', '}', '<', '>', '[', ']', '^ ', '~', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', ' '],
codes: [],
createCodeLoop: null,
codesCounter: 0,
init: function () {
"use strict";
if (typeof(G_vmlCanvasManager) != 'undefined') {
M.c = G_vmlCanvasManager.initElement('canvas');
} else {
M.c = document.getElementById('canvas');
}
M.ctx = M.c.getContext('2d');
M.c.width = M.WIDTH;
M.c.height = M.HEIGHT;
M.ctx.shadowBlur = 0;
M.ctx.fillStyle = '#000';
M.ctx.fillRect(0, 0, M.WIDTH, M.HEIGHT);
M.ctx.font = M.font;
var i = 0;
M.COLUMNS = Math.ceil(M.WIDTH / M.settings.COL_WIDTH);
for (i = 0; i < M.COLUMNS; i += 1) {
M.codes[i] = [];
M.codes[i][0] = {
'open': true,
'position': {'x': 0, 'y': 0},
'strength': 0
};
}
M.loop();
M.createLines();
M.createCode();
window.onresize = function () {
window.cancelAnimationFrame(M.animation);
M.animation = null;
M.ctx.clearRect(0, 0, M.WIDTH, M.HEIGHT);
M.codesCounter = 0;
M.ctx2.clearRect(0, 0, M.WIDTH, M.HEIGHT);
M.WIDTH = window.innerWidth;
M.HEIGHT = window.innerHeight;
M.init();
};
},
loop: function () {
"use strict";
M.animation = requestAnimationFrame(function () { M.loop(); });
M.draw();
},
draw: function () {
"use strict";
var velocity, height, x, y, c, ctx, i = 0;
M.ctx.shadowColor = 'rgba(0, 0, 0, 0.5)';
M.ctx.fillStyle = 'rgba(0, 0, 0, 0.5)';
M.ctx.fillRect(0, 0, M.WIDTH, M.HEIGHT);
M.ctx.globalCompositeOperation = 'source-over';
for (i = 0; i < M.COLUMNS; i += 1) {
if (M.codes[i][0].canvas) {
velocity = M.codes[i][0].velocity;
height = M.codes[i][0].canvas.height;
x = M.codes[i][0].position.x;
c = M.codes[i][0].canvas;
ctx = c.getContext('2d');
if ( i%2 ==0 ){
y = M.codes[i][0].position.y + height;
M.ctx.drawImage(c, x, y, M.settings.COL_WIDTH, height);
if ((M.codes[i][0].position.y + height) < M.HEIGHT) {
M.codes[i][0].position.y -= velocity;
} else {
M.codes[i][0].position.y = height;
}
}else{
y = M.codes[i][0].position.y - height;
M.ctx.drawImage(c, x, y, M.settings.COL_WIDTH, height);
if ((M.codes[i][0].position.y - height) < M.HEIGHT) {
M.codes[i][0].position.y += velocity;
} else {
M.codes[i][0].position.y = 0;
}
}
}
}
},
createCode: function () {
"use strict";
clearTimeout(M.createCodeLoop);
var randomInterval = M.randomFromInterval(0, 100), column = M.assignColumn(), codeLength = 0, i = 0, reverseString = "";
if (column) {
var codeVelocity = (Math.random() * (M.settings.VELOCITY_PARAMS.max - M.settings.VELOCITY_PARAMS.min)) + M.settings.VELOCITY_PARAMS.min, lettersLength = M.letters.length, newLetter = 0;
codeLength = M.randomFromInterval(M.settings.CODE_LENGTH_PARAMS.min, M.settings.CODE_LENGTH_PARAMS.max);
//if ( M.codesCounter%2 == 0 ){
M.codes[column][0].position = {'x': (column * M.settings.COL_WIDTH), 'y': 0};
M.codes[column][0].velocity = codeVelocity;
M.codes[column][0].strength = M.codes[column][0].velocity / M.settings.VELOCITY_PARAMS.max;
//}else{
// M.codes[column][0].position = {'x': (column * M.settings.COL_WIDTH), 'y': 0};
//M.codes[column][0].velocity = -codeVelocity;
//M.codes[column][0].strength = (M.codes[column][0].velocity * -1) / M.settings.VELOCITY_PARAMS.max;
//}
M.CheckArray(codeLength, messages, column, lettersLength)
M.createCanvii(column);
M.codesCounter += 1;
}
M.createCodeLoop = setTimeout(M.createCode, randomInterval);
},
CheckArray: function (codeLength, messages, column, lettersLength) {
"use strict";
var messageLengths = [];
messages.forEach(message => {messageLengths.push(message.length)});
messages.forEach(item => {
if (item.length == codeLength - 1) {
M.insertCustomMessages(codeLength, item, column);
} else {
M.randomMessage(codeLength, column, lettersLength, messageLengths);
}
});
},
insertCustomMessages: function (codeLength, message, column) {
"use strict";
for (var i = 1; i <= codeLength; i = i + 1) {
var reverseString = message.split('').reverse().join('');
M.codes[column][i] = reverseString.substring(i - 1, i);
}
},
randomMessage:function (codeLength, column, lettersLength, messageLengths){
"use strict";
if(messageLengths.includes(codeLength - 1)){
return;
}
for (var i = 1; i <= codeLength; i = i + 1) {
var newLetter = M.randomFromInterval(0, (lettersLength - 1));
M.codes[column][i] = M.letters[newLetter];
}
},
createCanvii: function (i) {
"use strict";
var j, text, fadeStrength, codeLen = M.codes[i].length - 1, canvHeight = codeLen * M.settings.COL_HEIGHT, velocity = M.codes[i][0].velocity, strength = M.codes[i][0].strength, newCanv = document.createElement('canvas'), newCtx = newCanv.getContext('2d');
newCanv.width = M.settings.COL_WIDTH;
newCanv.height = canvHeight;
newCtx.shadowOffsetX = 0;
newCtx.shadowOffsetY = 0;
newCtx.shadowBlur = 0;
newCtx.globalCompositeOperation = 'source-over';
newCtx.font = '30px matrix-code';
if (i %2 == 1){
for (j = 1; j < codeLen; j += 1) {
text = M.codes[i][j];
if (j < 3) {
newCtx.shadowColor = 'hsla(' + colorrain + ', 79%, 72%)';
newCtx.shadowBlur = 3;
newCtx.fillStyle = 'hsla(' + colorrain + ', 79%, ' + (100 - (j * 3)) + '%, ' + strength + ')';
} else if (j > (codeLen - 3)) {
fadeStrength = 1 - (j / codeLen);
newCtx.fillStyle = 'hsla(' + colorrain + ', 79%, 74%, ' + (fadeStrength + 0.3) + ')';
} else {
newCtx.fillStyle = 'hsla(' + colorrain + ', 79%, 74%, ' + strength + ')';
}
newCtx.fillText(text, 0, (canvHeight - (j * M.settings.COL_HEIGHT)));
}
}else{
for (j = codeLen; j > 1; j -= 1) {
text = M.codes[i][j];
if (j < (codeLen -3 ) ) {
newCtx.shadowColor = 'hsla(' + colorrain + ', 79%, 72%)';
newCtx.shadowBlur = 3;
newCtx.fillStyle = 'hsla(' + colorrain + ', 79%, ' + (j * 3) + '%, ' + strength + ')';
} else if (j < 3) {
fadeStrength = 1 - (j / codeLen);
newCtx.fillStyle = 'hsla(' + colorrain + ', 79%, 74%, ' + (fadeStrength + 0.3) + ')';
} else {
newCtx.fillStyle = 'hsla(' + colorrain + ', 79%, 74%, ' + strength + ')';
}
newCtx.fillText(text, 0, (canvHeight - (j * M.settings.COL_HEIGHT)));
}
}
M.codes[i][0].canvas = newCanv;
},
swapCharacters: function () {
"use strict";
var randomCodeIndex, randomCode, randomCodeLen, randomCharIndex, newRandomCharIndex, newRandomChar, i = 0;
for (i = 0; i < 20; i += 1) {
randomCodeIndex = M.randomFromInterval(0, (M.codes.length - 1));
randomCode = M.codes[randomCodeIndex];
randomCodeLen = randomCode.length;
randomCharIndex = M.randomFromInterval(2, (randomCodeLen - 1));
newRandomCharIndex = M.randomFromInterval(0, (M.letters.length - 1));
newRandomChar = M.letters[newRandomCharIndex];
randomCode[randomCharIndex] = newRandomChar;
}
M.swapCharacters();
},
createLines: function () {
"use strict";
M.linesC = document.createElement('canvas');
M.linesC.width = M.WIDTH;
M.linesC.height = M.HEIGHT;
M.linesC.style.position = 'absolute';
M.linesC.style.top = 0;
M.linesC.style.left = 0;
M.linesC.style.zIndex = 10;
document.body.appendChild(M.linesC);
var linesYBlack = 0, linesYWhite = 0;
M.ctx2 = M.linesC.getContext('2d');
M.ctx2.beginPath();
M.ctx2.lineWidth = 1;
M.ctx2.strokeStyle = 'rgba(0, 0, 0, 0.7)';
while (linesYBlack < M.HEIGHT) {
M.ctx2.moveTo(0, linesYBlack);
M.ctx2.lineTo(M.WIDTH, linesYBlack);
linesYBlack += 5;
}
M.ctx2.lineWidth = 0.15;
M.ctx2.strokeStyle = 'rgba(255, 255, 255, 0.7)';
while (linesYWhite < M.HEIGHT) {
M.ctx2.moveTo(0, linesYWhite + 1);
M.ctx2.lineTo(M.WIDTH, linesYWhite + 1);
linesYWhite += 5;
}
M.ctx2.stroke();
},
assignColumn: function () {
"use strict";
var randomColumn = M.randomFromInterval(0, (M.COLUMNS - 1));
return randomColumn;
},
randomFromInterval: function (from, to) {
"use strict";
return Math.floor(Math.random() * (to - from + 1 ) + from);
},
snapshot: function () {
"use strict";
window.open(M.c.toDataURL());
}
};
window.onload = function () {
"use strict";
M.init();
};