Initial commit.

simulation.h

@@ -0,0 +1,34 @@
+// -*- C++ -*-
+
+#ifndef MBOSTOCK_SIMULATION_H
+#define MBOSTOCK_SIMULATION_H
+
+#include <stdint.h>
+
+namespace mbostock {
+
+  class Simulation {
+  public:
+    Simulation(uint32_t timeStepMs);
+    virtual ~Simulation() {}
+
+    virtual void togglePaused();
+    inline bool paused() const { return paused_; }
+
+    void simulate();
+
+  protected:
+    virtual void step() = 0;
+
+  private:
+    uint32_t elapsedMillis();
+
+    uint32_t timeStepMs_;
+    uint32_t skippedMs_;
+    uint32_t lastTimeMs_;
+    bool paused_;
+  };
+
+}
+
+#endif