Create numbers.js

src/programs/demos/numbers.js

@@ -0,0 +1,78 @@
+/**
+@author ertdfgcvb
+@title  Numbers
+@desc   Fun with BigInts
+[header]
+?fullscre
+*/
+
+import { map } from '/src/modules/num.js'
+import { CGA } from '/src/modules/color.js'
+
+CGA.splice(10, 1)
+//CGA.splice(6, 1)
+CGA.splice(4, 1)
+CGA.splice(2, 1)
+CGA.splice(0, 1)
+
+export const settings = {
+	background : 'black'
+}
+
+const numbers = [
+	488162862,
+	147460255,
+	487657759,
+	1042482734,
+	71662658,
+	1057949230,
+	487540270,
+	1041305872,
+	488064558,
+	488080430
+]
+
+// Read a bit of a BigInt (probably slow?)
+const bit = (n, k) => n >> k & 1
+
+const numX = 5 // number width
+const numY = 6 // number height
+
+const spacingX = 2 // spacing, after scale
+const spacingY = 1
+
+export function main(coord, context, cursor, buffers){
+
+	const f = context.frame
+
+	const scale = (map(Math.sin(f * 0.01), -1, 1, 0.99, context.rows / numY))
+
+	const x = coord.x / scale
+	const y = coord.y / scale
+
+	const sx = numX + spacingX / scale
+	const sy = numY + spacingY / scale
+	const cx = Math.floor(x / sx) // cell X
+	const cy = Math.floor(y / sy) // cell Y
+
+	const offs = Math.round(map(Math.sin(f * 0.012 + (cy * 0.5)), -1, 1, 0, 100))
+	const num = (cx + cy + offs) % 10
+
+	const nx = Math.floor(x % sx)
+	const ny = Math.floor(y % sy)
+
+	let char
+
+	if (nx < numX && ny < numY) {
+		char = bit(numbers[num], (numX - nx - 1) + (numY - ny - 1) * numX)
+	} else {
+		char = 0
+	}
+
+	let color = num % CGA.length
+	return {
+		char : '.▇'[char],
+		color : char ? CGA[color].hex : CGA[5].hex
+	}
+}
+