start new slice / layer / render system

src/kiri/render.js

@@ -0,0 +1,50 @@
+/** Copyright Stewart Allen <sa@grid.space> -- All Rights Reserved */
+
+"use strict";
+
+(function() {
+    class Render {
+        constructor() {
+            this.layers = {};
+        }
+
+        setLayer(layer, color) {
+            let layers = this.layers;
+            this.current = layers[layer] = layers[layer] || {
+                lines: [],
+                polys: [],
+                faces: [],
+                color: color || 0
+            };
+            return this;
+        }
+
+        addLine(p1, p2) {
+            this.current.lines.push(p1, p2);
+            return this;
+        }
+
+        addPoly(poly) {
+            this.current.polys.push(poly);
+            // const lines = this.current.lines;
+            // const points = poly.points;
+            // const len = points.length;
+            // for (let i=1; i<len; i++) {
+            //     lines.push(points[i-1], points[i]);
+            // }
+            // if (!poly.open) {
+            //     lines.push(points[len - 1], points[0]);
+            // }
+            return this;
+        }
+
+        addPolys(arr) {
+            for (let i=0; i<arr.length; i++) {
+                this.addPoly(arr[i]);
+            }
+            return this;
+        }
+    }
+
+    self.kiri.Render = Render;
+})();