1 files changed, 50 insertions, 0 deletions
diff --git a/solve/findoff.js b/solve/findoff.js
new file mode 100644
index 0000000..9749910
--- /dev/null
+++ b/solve/findoff.js
@@ -0,0 +1,50 @@
+const { noise } = require("./perlin.js");
+const { argv } = require("process");
+const crypto = require("node:crypto");
+const sharp = require("sharp");
+const fs = require("fs");
+
+const WIDTH = 256;
+const HEIGHT = 256;
+
+const main = async() => {
+	var buffer = fs.readFileSync("tmp.webp")
+	const image = await sharp(buffer, {
+			webp: {
+				width: WIDTH,
+				height: HEIGHT,
+				channels: 1
+			}
+		}).raw().toBuffer()
+	var ivals = Uint8Array.from(image);
+	console.log(ivals.length, 256 * 256 * 3)
+
+	for (let seed = 0; seed < 65536; seed++) {
+		noise.seed(seed);
+		//let ox = parseInt(argv[2]);
+		for (let ox = 0; ox < 256; ox++) {
+			//let p = parseInt(argv[3]);
+			//console.log(p);
+			for (let p = 0; p < 16; p++) {
+				let match = true;
+				for (let y = 0; y < 40; y++) {
+					for (let x = 0; x < 40; x++) {
+						let v = noise.perlin2(ox + p * 0.0625 + x * 0.05, y * 0.05);
+						v = (v + 1.0) * 0.5;
+						v = (v * 256) | 0;
+						if (ivals[(y * 256 + x) * 3] != v) {
+							match = false;
+							break;
+						}
+					}
+					if (!match)
+						break;
+				}
+				if (match)
+					console.log("IDX", ox);
+			}
+		}
+	}
+}
+
+main();