Initial commit.

physics/transform.h

@@ -0,0 +1,25 @@
+// -*- C++ -*-
+
+#ifndef MBOSTOCK_TRANSFORM_H
+#define MBOSTOCK_TRANSFORM_H
+
+namespace mbostock {
+
+  class Transform {
+  public:
+    Transform();
+    virtual ~Transform() {}
+
+    void enable(bool enabled = true);
+    inline bool enabled() const { return enabled_; }
+
+    virtual void reset() = 0;
+    virtual void step() = 0;
+
+  private:
+    bool enabled_;
+  };
+
+}
+
+#endif