Rounded segments code.

src/libraries/vg/commands/filters.js

@@ -908,4 +908,73 @@ vg.compound = function (shape1, shape2, method) {
     return path;
 };
 
+function constructPath(points, closed) {
+    const segments = [];
+    let d = {};
+    let i = 0;
+    points.forEach(pt => {
+        if (i === 0) {
+          d._in = pt;
+        } else if (i === 1) {
+          d._pt = pt;
+        } else if (i === 2) {
+          d._out = pt;
+        }
+        i += 1;
+        if (i === 3) {
+            segments.push(d);
+            i = 0;
+            d = {};
+        }
+    });
+    const commands = [];
+    length = segments.length;
+    if (closed) { length += 1; }
+    for (i = 0; i < length; i += 1) {
+        let seg = segments[i % segments.length];
+        if (i === 0) {
+            commands.push({ cmd: "moveto", pt: seg._pt });
+        } else {
+            d = { cmd: "curveto", pt: seg._pt, ctrl1: segments[i - 1]._out, ctrl2: seg._in };
+            commands.push(d);
+        }
+    }
+    const path = new Path();
+    commands.forEach(el => {
+        if (el.cmd === "moveto") {
+            path.moveTo(el.pt.x, el.pt.y);
+        } else if (el.cmd === "curveto") {
+            path.curveTo(el.ctrl1.x, el.ctrl1.y, el.ctrl2.x, el.ctrl2.y, el.pt.x, el.pt.y);
+        }
+    });
+    return path;
+}
+
+vg.roundedSegments = function (shape, d) {
+    const points = vg.toPoints(shape);
+    const newPoints = [];
+    for (let i = 0; i < points.length; i +=1) {
+        let pt = points[i];
+        let prev;
+        if (i === 0) {
+            prev = points[points.length - 1];
+        } else {
+            prev = points[i - 1];
+        }
+        let next = points[(i + 1) % points.length];
+        let a = g.angle(prev, next);
+        let c1 = g.coordinates(pt.x, pt.y, a, -d[i % d.length]);
+        let c2 = g.coordinates(pt.x, pt.y, a, d[i % d.length]);
+        newPoints.push(c1);
+        newPoints.push(pt);
+        newPoints.push(c2);
+    }
+    let path = constructPath(newPoints, shape.isClosed());
+    path.fill = shape.fill;
+    path.stroke = shape.stroke;
+    path.strokeWidth = shape.strokeWidth;
+    return path;
+};
+
+
 module.exports = vg;