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Try to fix overlapping trails

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Kai Vogelgesang 2022-10-11 14:54:47 +02:00
parent 822f97de4d
commit bf754adf8b
Signed by: kai
GPG Key ID: 0A95D3B6E62C0879
1 changed files with 38 additions and 7 deletions
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45
src/MatrixBackground.tsx
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@ -33,7 +33,7 @@ const ALPHABET = (() => {
const MEMES = [
"ABFAHRT",
"BALLERN",
"NOSLEEP",
"NO SLEEP",
"ｱﾔﾔｱﾔﾔ", // Ayaya Ayaya
"ｵﾏｴﾊﾓｳｼﾝﾃｲﾙ", // Omae wa mou shindeiru
]
@ -86,11 +86,22 @@ function randomTrail(): Trail {
// Pick and add a random meme
const meme = choice(MEMES);
content.push({
chars: meme,
fillStyle: MEME_STYLE,
});
totalLength += meme.length;
// If the meme has spaces, replace them with random characters
// This also places a random character after the meme, ensuring
// that two memes don't come immediately after each other
for (let chunk of meme.split(" ")) {
content.push({
chars: chunk,
fillStyle: MEME_STYLE,
});
content.push({
chars: choice(ALPHABET),
fillStyle: NORMAL_STYLE,
});
}
totalLength += meme.length + 1;
} else {
// No meme, just add one random character
current += choice(ALPHABET);
@ -136,7 +147,15 @@ const MatrixBackground = () => {
const width = canvas.width;
const height = canvas.height;
const trails: Trail[] = new Array(TRAIL_COUNT).fill(0).map((_) => randomTrail());
const safe = new Array(COLS).fill(ROWS);
const trails: Trail[] = new Array(TRAIL_COUNT).fill(null);
for (let i in trails) {
let trail = randomTrail();
trail.head = Math.min(trail.head, safe[trail.col]);
safe[trail.col] = Math.min(safe[trail.col], trail.head - trail.length - 1);
trails[i] = trail;
}
const matrixEffect = () => {
ctx.fillStyle = "#000";
@ -170,6 +189,12 @@ const MatrixBackground = () => {
}
}
// update the safe respawn locations
safe.fill(ROWS);
for (let trail of trails) {
safe[trail.col] = Math.min(safe[trail.col], trail.head - trail.length - 1);
}
// update all trails
for (let i in trails) {
trails[i].head += 1;
@ -177,6 +202,12 @@ const MatrixBackground = () => {
if (trails[i].head - trails[i].length > ROWS) {
// trail is completely off-screen, generate a new one
trails[i] = randomTrail();
// If the trail potentially overlaps, bump it up until it can't
trails[i].head = Math.min(trails[i].head, safe[i]);
// update the safe respawn locations
safe[i] = Math.min(safe[i], trails[i].head - trails[i].length - 1);
}
}
}