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art/jitter-scarlettekk/jitter.js

@@ -6,31 +6,42 @@
 
 
 /* VARIABLES */
-const spiralTightness = 0.00025;
-const spiralSize = 1;
-const jitterIterationDampener = 0.0001;
-const jitterLengthDampener = 0.0005;
-const jitterMaxAngle = 360;
+var spiralTightness = bt.randInRange(0.5, 1);
+var spiralSize = bt.randInRange(0.5, 1);
+var jitterIterationDampener = bt.randInRange(0.1, 1);
+var jitterLengthDampener = bt.randInRange(0.1, 1);
+var jitterMaxAngle = bt.randInRange(180, 360);
+
+/* allow normalization of variables to 1 */
+spiralTightness *= 0.00025;
+jitterIterationDampener *= 0.0001;
+jitterLengthDampener *= 0.0005;
 
 setDocDimensions(125, 125); // center is 63, 63
+const bounds = [[[0, 0], [0, 125], [125, 125], [125, 0], [0, 0]]];
 const t = new bt.Turtle();
-const tt = new bt.Turtle(); //used for tracking the pure spiral
-
+const tt = new bt.Turtle(); //used for introducing wobble
+const ttt = new bt.Turtle(); //used for tracking the pure spiral
 t.jump([63,63]);
 tt.jump([63,63]);
+ttt.jump([63,63]);
+ttt.up();
 tt.up();
 t.down();
 
 for (var i = 0; i <= 4000; i++) {
-  tt.forward(i * spiralTightness); // track the 
-  tt.right(spiralSize);            // pure spiral
+  ttt.forward(i * spiralTightness); // track the 
+  ttt.right(spiralSize);            // pure spiral
+  tt.right(bt.randInRange(0, 30));
+  tt.forward(5);
   for (var z = 0; z < bt.randIntInRange(0, 50) * i * jitterIterationDampener; z++) {
   t.right(bt.randInRange(0, jitterMaxAngle));       // introduce the jitter to the
   t.forward(bt.rand() * i * jitterLengthDampener);  // drawing turtle
   }
   t.goTo(tt.pos); // reset jitter for the next step
+  tt.goTo(ttt.pos);
 }
 
-drawLines(t.lines());
+drawLines(bt.cut(t.lines(), bounds));
 drawLines(bt.text("the downward spiral", [3,10], 0.5));
-drawLines(bt.text("coraline shuryn", [3,5], 0.5));
+drawLines(bt.text("coraline shuryn", [3,5], 0.5));