First round of dead file removal

experimental/flocking_geese/nacl_app/flock.h

-// Copyright (c) 2011 The Native Client Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef FLOCK_H_
-#define FLOCK_H_
-
-#include <string>
-#include <tr1/memory>
-#include <vector>
-
-#include "boost/scoped_ptr.hpp"
-#include "nacl_app/goose.h"
-#include "nacl_app/locking_image_data.h"
-#include "nacl_app/frame_counter.h"
-#include "nacl_app/scoped_pixel_lock.h"
-#include "nacl_app/sprite.h"
-#include "nacl_app/vector2.h"
-#include "ppapi/cpp/point.h"
-#include "ppapi/cpp/rect.h"
-#include "ppapi/cpp/size.h"
-#include "threading/condition_lock.h"
-#include "threading/pthread_ext.h"
-
-namespace flocking_geese {
-// The main object that runs a simple flocking simulation.  This object owns
-// a flock of Geese.  See:
-// http://processingjs.org/learning/topic/flocking with references to
-// http://harry.me/2011/02/17/neat-algorithms---flocking.
-class Flock {
- public:
-  // The possible simulation modes.
-  enum SimulationMode {
-    kRunning,  // Running simulation ticks.
-    kRenderThrottle,  // Waiting for the browser to catch up.
-    kPaused
-  };
-
-  Flock();
-  virtual ~Flock();
-
-  // Start up the simulation thread.  The simultion is started in paused
-  // mode, to get the simulation running you have to set the simulation
-  // mode to kRunning (see set_simulaiton_mode());
-  void StartSimulation();
-
-  // Resize the simulation to |size|.  The new dimensions are used as the
-  // boundaries for the geese.
-  void Resize(const pp::Size& size);
-
-  // Create a flock of geese.  The geese start at the given location with
-  // random velocities.  Any previous geese are deleted and the simulation
-  // starts with an entirely new flock.
-  // @param size The size of the flock.
-  // @param initialLocation The initial location of each goose in the flock.
-  void ResetFlock(size_t size, const Vector2& initialLocation);
-
-  // Run one tick of the simulation.  This records the tick duration.
-  void SimulationTick();
-
-  // Render the flock into the shared pixel buffer.  Clears the rendering
-  // throttle.
-  void Render();
-
-  // Sleep on the condition that the current simulation mode is not the
-  // paused mode.  Returns the new run mode.
-  SimulationMode WaitForRunMode();
-
-  // Set the location of the attractor at the specified index.  The array of
-  // attractors is expanded to include |index|.
-  void SetAttractorAtIndex(const Vector2& attractor, size_t index);
-
-  SimulationMode simulation_mode() const {
-    return static_cast<SimulationMode>(simulation_mode_.condition_value());
-  }
-  void set_simulation_mode(SimulationMode new_mode);
-
-  double FrameRate() const {
-    return frame_counter_.frames_per_second();
-  }
-
-  void set_pixel_buffer(
-      const std::tr1::shared_ptr<LockingImageData>& pixel_buffer) {
-    shared_pixel_buffer_ = pixel_buffer;
-  }
-
-  // Flock takes ownership of |goose_sprite|.  The caller should not reference
-  // the pointer after this call.
-  void set_goose_sprite(Sprite* goose_sprite) {
-    goose_sprite_.reset(goose_sprite);
-  }
-  // Return |true| if the goose sprite data has been set.
-  bool has_goose_sprite() const {
-    return goose_sprite_ != NULL;
-  }
-
-  pthread_mutex_t* simulation_mutex() {
-    return &flock_simulation_mutex_;
-  }
-
-  // Set the condition lock to indicate whether the simulation thread is
-  // running.
-  bool is_simulation_running() const {
-    return sim_state_condition_.condition_value() != kSimulationStopped;
-  }
-  void set_is_simulation_running(bool flag) {
-    sim_state_condition_.Lock();
-    sim_state_condition_.UnlockWithCondition(
-        flag ? kSimulationRunning : kSimulationStopped);
-  }
-
-  // The simulation tick counter is locked by the simulation mode.
-  int32_t tick_counter() const {
-    return tick_counter_;
-  }
-  void set_tick_counter(int32_t count) {
-    tick_counter_ = count;
-  }
-  int32_t increment_tick_counter() {
-    return ++tick_counter_;
-  }
-
- private:
-  // The state of the main simulation thread.  These are values that the
-  // simulation condition lock can have.
-  enum SimulationState {
-    kSimulationStopped,
-    kSimulationRunning
-  };
-
-  // The main simulation loop.  This loop runs the Life simulation.  |param| is
-  // a pointer to the Life instance.  This routine is run on its own thread.
-  static void* FlockSimulation(void* param);
-
-  // Thread support variables.
-  pthread_t flock_simulation_thread_;
-  pthread_mutex_t flock_simulation_mutex_;
-  threading::ConditionLock sim_state_condition_;
-  std::tr1::shared_ptr<LockingImageData> shared_pixel_buffer_;
-
-  // Simulation variables.
-  pp::Rect flockBounds_;
-  threading::ConditionLock simulation_mode_;
-  std::vector<Goose> geese_;
-  std::vector<Vector2> attractors_;
-  FrameCounter frame_counter_;
-  int32_t tick_counter_;  // Number of sim ticks between Render() calls.
-
-  // Drawing support.
-  boost::scoped_ptr<Sprite> goose_sprite_;
-};
-
-}  // namespace flocking_geese
-
-#endif  // FLOCK_H_
-