simpler worker

turtle-svg-worker.js

@@ -0,0 +1,34 @@
+// Worker setup
+self.onmessage = function(e) {
+  importScripts('./turtle-parse.js');
+  _resetTurtle();
+
+  try {
+    eval(e.data);
+
+    // Build SVG string
+    var svg = '<svg id="turtle-svg" xmlns="http://www.w3.org/2000/svg" version="1.1" width="'+
+      Math.ceil(_max.x) + '" height="' +
+      Math.ceil(_max.y) +'">'+"\n";
+    for (var i=0; i<_paths.length; i++) {
+      var path = _paths[i];
+      svg += '  <path id="turtle-path-'+ i +'" '+
+        'stroke="' + path.color + '" '+
+        'd="' + path.d + '" '+
+        'fill="' + (path.fill ? path.fill : 'none') + '" vector-effect="non-scaling-stroke" />' + "\n";
+    }
+    svg += '</svg>';
+
+    self.postMessage({
+      svg: svg,
+      code: e.data,
+      paths: _paths
+    });
+
+    // Terminate self
+    self.close();
+  } catch (error) {
+    // err
+    self.postMessage("");
+  }
+};