navArea.h

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/*******************************************************************************
** Copyright (c) 2015 MaK Technologies, Inc.
** All rights reserved.
*******************************************************************************/



#pragma once

#include "vrfNavigation/vrfNavigationDefines.h"
#include <string>
#include "vrfNavigation/navDataTag.h"
#include <matrix/vlVector.h>
#include "vrfutil/localVertexList.h"
#include "boost/shared_ptr.hpp"
#include "vrfutil/rwString.h"

class Coordinate_System;
class DtExtent;
class DtVrfObject;
class DtNavBot;

enum DtOnGraphVertexVisitedResult
{
   OnGraphVertexVisited_IgnoreVertex_GoOn,
   OnGraphVertexVisited_IgnoreVertex_StopWithBestSoFar,
   OnGraphVertexVisited_StopOnThisVertex,
   OnGraphVertexVisited_VertexIsTheBestSoFar_GoOn,
   OnGraphVertexVisited_NeedToCheckRefinePathToThisVertex
};

enum DtOnPathToGraphVertexComputedResult
{
   OnPathToGraphVertexComputed_IgnoreVertex_GoOn,
   OnPathToGraphVertexComputed_IgnoreVertex_StopWithBestSoFar,
   OnPathToGraphVertexComputed_StopOnThisVertex,
   OnPathToGraphVertexComputed_VertexIsTheBestSoFar_GoOn,
};

//Base class for asynchronous Nav Area queries.
//In this context asynchronous means non-blocking, but performed
//in a single-thread. These queries are time-sliced by
//gameware's infrastructure.  
//Will be ticked by the navArea's update function.

class DT_DLL_vrfNavigation DtNavAreaQuery
{
public:
   typedef boost::shared_ptr<DtNavAreaQuery> Ptr;

   DtNavAreaQuery() { };
   virtual ~DtNavAreaQuery() { };

   virtual bool complete() = 0;
   virtual bool tick() = 0;
   virtual bool success() = 0;

   virtual bool navDataChanged() = 0;
   virtual bool outOfWorkingMemory() = 0;
   virtual bool hadComputationError() = 0;

   virtual std::vector<DtVector> results() = 0;
   virtual void* internalQuery() = 0;
};

//Query that can be used when there is no valid navData.
class DT_DLL_vrfNavigation DtNavAreaNullQuery : public DtNavAreaQuery
{
public:
   DtNavAreaNullQuery() : DtNavAreaQuery() { };
   virtual ~DtNavAreaNullQuery() { };

   virtual bool complete() { return true; };
   virtual bool tick() { return true; };
   virtual bool success() { return true; };
   virtual bool navDataChanged() { return false; };
   virtual bool outOfWorkingMemory() { return false; };
   virtual bool hadComputationError() { return false; };
   virtual std::vector<DtVector> results() { return std::vector<DtVector>(); };
   virtual void *internalQuery(void) { return 0; };
};

struct DT_DLL_vrfNavigation DtNavAreaConfig
{
   DtNavAreaConfig() : workingMemorySize(16) {};

   int workingMemorySize;

};
class DT_DLL_vrfNavigation DtNavArea
{
public:
   struct DtNavDataDebugInfo
   {
      DtString navAreaName;
      int port;
      std::vector<DtRwString> profiles;
      DtString status;
   };

   typedef DtNavArea* (*DtNavAreaCreatorFcn)();
   typedef DtOnGraphVertexVisitedResult (*DtPointOfInterestEvaluatorFcn)(const DtVector& localPoint, void* userData);
   typedef void (*DtSearchAreaPointCostModifierEvaluatorFcn)(const DtVector& localPoint, float* currentCost, void* userData);
   typedef DtOnPathToGraphVertexComputedResult (*DtPathCalculatedEvaluatorFcn)(const DtVector& localPoint, double pathCost, void* userData);

   static DtNavArea* create();
   static void setNavAreaCreatorFcn(DtNavAreaCreatorFcn fcn);

   static bool navAreaDebuggingEnabled();
   static void setNavAreaDebuggingEnabled(bool enable);

   virtual ~DtNavArea() {};
   virtual bool initialize(Coordinate_System* coordSys, DtNavAreaConfig config,
      std::vector<DtString> profiles = std::vector<DtString>()) = 0;
   virtual void update(float deltaTimeInSeconds) = 0;
   virtual bool loadNavData(const DtString& path, const DtVariableBindingsList& variableBindings = 
      DtReaderWriter::nullVariableReference(), bool objectNavData = false) = 0;
   virtual bool inNavArea(const DtVector& localPos) = 0;
   virtual bool validPosition(const DtString& profile, const DtVector& localPos) = 0;
   
   //Returns true if this area is valid for the given navigation profile. 
   virtual bool validForProfile(const DtString& profile) const = 0;

   virtual DtNavDataDebugInfo* debugInfo() = 0;

   virtual void setExtent(DtExtent* e) = 0;
   virtual DtExtent localExtent() = 0;

   virtual void cancelQuery(DtNavAreaQuery::Ptr) = 0;

   virtual DtNavAreaQuery::Ptr findNearbyPointOfInterest(const DtString& profile, const DtVector& startLocalPos,
      int tag = DtNavDataTagAny, double propagationRadius = 200.,
      DtPointOfInterestEvaluatorFcn evalFcn = 0, DtPathCalculatedEvaluatorFcn pathFcn = 0, void* evalFcnUserData = 0) = 0;

   virtual DtNavAreaQuery::Ptr findBestExitPoint(const DtString& profile, DtNavBot* searcher,
      const DtVector& startLocalPos, const DtVector& destination,
      int tag = DtNavDataTagAny, double propagationRadius = 200.,
      DtPointOfInterestEvaluatorFcn evalFcn = 0, DtPathCalculatedEvaluatorFcn pathFcn = 0, void* evalFcnUserData = 0) = 0;

   virtual bool findInsidePositionFromOutsidePosition(const DtString& profile,
      double searchRadius, const DtVector& fromFromHere, DtVector& result, int& halfEdgeType) = 0;

   virtual DtNavAreaQuery::Ptr findBestPathTo(const DtString& profile, const DtVector& start,
      const std::vector<DtVector>& localDestinationPositions, DtNavBot* searcher, int tag = -1,
      DtSearchAreaPointCostModifierEvaluatorFcn = 0, DtPointOfInterestEvaluatorFcn = 0, DtPathCalculatedEvaluatorFcn = 0,
      void* usrData = 0, bool startMovingWhenFound = false) = 0;

   //User callback to check randomly generated points. The callback function
   //should return true if the point is acceptable.
   typedef bool (*DtLocalPointUserEvalCallback)(const DtVector& localVector, DtNavAreaQuery* query, void* userData);
   static bool emptyCallback(const DtVector&, DtNavAreaQuery*, void*);

   //Generate some number of random points.
   //If localAccessibilityPoint is set, all points must be navigable
   //from the access point.
   //If boundingArea is set, all points must be inside the area, 
   //ignoring elevation. Note that this will not cause points to be
   //generated outside the navArea.
   //If boundingArea is not set, and radius is set, points will be generated
   //using radius as a maximum distance from accessibilityPoint.
   //If minDistanceBetweenPoints is set, generated points will be tested
   //against the rest of the set of random points to make sure none are within
   //the given distance of each other.
   //If callbackFcn is set, this user function is called on each generated
   //point, to test if each point is acceptable.
   virtual DtNavAreaQuery::Ptr generateRandomPoints(const DtString& profile,
      const DtVector& localAccessibilityPoint = DtVector::zero(),
      double radius = -1,
      const DtLocalVertexList& boundingArea = DtLocalVertexList(),
      unsigned numberOfPoints = 1,
      double minDistanceBetweenPoints = 0.0,
      DtLocalPointUserEvalCallback callbackFcn = emptyCallback,
      void* userData = 0) = 0;

   DtVrfObject* attachedObject() { return myAttachedObject; }
   void setAttachedObject(DtVrfObject* object) { myAttachedObject = object; }

  virtual  std::vector<DtVector> searchInArea(const DtString& profile,
      const DtVector& startLocalPos, double radius, double postSpacing, DtNavBot* searcher,
      DtPointOfInterestEvaluatorFcn evalFcn = 0, void* evalFcnUserData = 0, int tag = -1) = 0;

protected:
   static DtNavAreaCreatorFcn theNavAreaCreatorFcn;

   static bool theNavAreaDebuggingEnabled;

   DtVrfObject* myAttachedObject;
};