prototype for ice seperation

public/modules/renderers/draw-ice.js

@@ -0,0 +1,37 @@
+"use strict";
+
+// Ice layer renderer - renders ice from data model to SVG
+function drawIce() {
+  TIME && console.time("drawIce");
+
+  // Clear existing ice SVG
+  ice.selectAll("*").remove();
+
+  // Draw glaciers
+  pack.ice.glaciers.forEach((glacier, index) => {
+    ice
+      .append("polygon")
+      .attr("points", glacier.points)
+      .attr("type", "iceShield")
+      .attr("data-index", index)
+      .attr("class", "glacier");
+  });
+
+  // Draw icebergs
+  pack.ice.icebergs.forEach((iceberg, index) => {
+    ice
+      .append("polygon")
+      .attr("points", iceberg.points)
+      .attr("cell", iceberg.cellId)
+      .attr("size", iceberg.size)
+      .attr("data-index", index)
+      .attr("class", "iceberg");
+  });
+
+  TIME && console.timeEnd("drawIce");
+}
+
+// Re-render ice layer from data model
+function redrawIce() {
+  drawIce();
+}