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art/harmonograph-Ansh/index.js

@@ -0,0 +1,51 @@
+const width = 125;
+const height = 125;
+
+setDocDimensions(width, height);
+
+const t = new bt.Turtle();
+
+const e= 2.71828
+
+const polylines= t.lines();
+
+const scale = 30 
+const p1 = 1;
+const f1 = 1;
+const d1 = 0; 
+
+const p2 = 1;
+const f2 = 1;
+const d2 = 0; 
+
+const p3 = 1; 
+const f3 = 1; 
+const d3 = 0; 
+
+const p4 = 1; 
+const f4 = 1; 
+const d4 = 0; 
+
+function walk(step) {
+    const i = step / 100;
+    const x = Math.sin(f1 * i + p1) * Math.pow(e, -d1 * i) + Math.sin(f2 * i + p2) * Math.pow(e, -d2 * i);
+    const y = Math.sin(f3 * i + p3) * Math.pow(e, -d3 * i) + Math.sin(f4 * i + p4) * Math.pow(e, -d4 * i);
+    t.goTo([scale * x, scale * y]);
+    t.down();
+    return step < 10000;
+}
+
+
+let step = 0;
+while (walk(step)) {
+    step++;
+}
+function centerPolylines(polylines, documentWidth, documentHeight) {
+  const cc = bt.bounds(polylines).cc;
+  bt.translate(polylines, [documentWidth / 2, documentHeight / 2], cc);
+}
+
+let final = t.lines()
+centerPolylines(final,width,height)
+
+drawLines(final);