diff --git a/d3/plugins/d3.superformula-tests.ts b/d3/plugins/d3.superformula-tests.ts
new file mode 100644
index 0000000000..3e7dd4d58e
--- /dev/null
+++ b/d3/plugins/d3.superformula-tests.ts
@@ -0,0 +1,40 @@
+/// <reference path="../d3.d.ts" />
+/// <reference path="d3.superformula.d.ts" />
+
+function superformula() {
+    var size = 1000;
+
+    var x = d3.scale.ordinal()
+        .domain(d3.superformulaTypes)
+        .rangePoints([0, 960], 1);
+
+    var svg = d3.select("body").append("svg")
+        .attr("width", 960)
+        .attr("height", 500);
+
+    var small = d3.superformula()
+        .type(function (d) { return d; } )
+        .size(size);
+
+    var big = d3.superformula()
+        .type("square")
+        .size(size * 50)
+        .segments(360);
+
+    svg.selectAll("a")
+        .data(d3.superformulaTypes)
+        .enter().append("a")
+        .attr("xlink:title", String)
+        .attr("transform", function (d, i) { return "translate(" + x(d) + ",40)"; } )
+        .append("path")
+        .attr("class", "small")
+        .attr("d", small)
+        .on("mousedown", function () { d3.select(this).style("fill", "aliceblue"); } )
+        .on("mouseup", function () { d3.select(this).style("fill", null); } )
+        .on("click", function (d) { d3.select(".big").transition().duration(500).attr("d", big.type(d)); } );
+
+    svg.append("path")
+        .attr("class", "big")
+        .attr("transform", "translate(450,250)")
+        .attr("d", big);
+}
\ No newline at end of file
diff --git a/d3/plugins/d3.superformula.d.ts b/d3/plugins/d3.superformula.d.ts
new file mode 100644
index 0000000000..ce649446bf
--- /dev/null
+++ b/d3/plugins/d3.superformula.d.ts
@@ -0,0 +1,38 @@
+/// <reference path="../d3.d.ts" />
+
+
+declare module D3 {
+    interface SuperformulaPath
+    {
+        superformulaPath(params: number[], n: number, diameter: number): Superformula;
+    }
+
+
+    interface SuperformulaType
+    {
+        (any): any;//hans
+        m: number;
+        n1: number;
+        n2: number;
+        n3: number;
+        a: number;
+        b: number;
+    }
+
+    interface Superformula
+    {
+        (): any;
+        type(any): any;
+        param(name: string, value: number): Superformula;
+        size(x: number): Superformula;
+        segments(x: number): Superformula;
+    }
+
+
+    interface Base extends Selectors
+    {
+        superformula: Superformula;
+        superformulaPath: SuperformulaPath;
+        superformulaTypes: SuperformulaType[];
+    }
+}
\ No newline at end of file
diff --git a/d3/plugins/superformula.ts b/d3/plugins/superformula.ts
deleted file mode 100644
index bb1703c14f..0000000000
--- a/d3/plugins/superformula.ts
+++ /dev/null
@@ -1,39 +0,0 @@
-
-interface ID3superformulaPath
-{
-    superformulaPath(params: number[], n: number, diameter: number): ID3superformula;
-}
-
-
-interface ID3superformulaType
-{
-    (any): any;//hans
-    m: number;
-    n1: number;
-    n2: number;
-    n3: number;
-    a: number;
-    b: number;
-}
-
-interface ID3superformula
-{
-    (): any;  
-    type(any): any;
-    param(name: string, value: number): ID3superformula;
-    size(x: number): ID3superformula;
-    segments(x: number): ID3superformula;
-}
-interface ID3Selectors
-{
-
-}
-
-
-interface ID3Base extends ID3Selectors
-{
-    keys: ID3superformulaType[];
-    superformula: ID3superformula;
-    superformulaPath: ID3superformulaPath;
-    superformulaTypes: ID3superformulaType[];
-}