集成阶段 4：使用查询在运行时计算路径

#include "gwnavruntime/queries/astarquery.h"
...

class MyGameLevel
{
public:
    ...    
    void Update(float deltaTimeInSeconds);
    ...
    void TestAStarQuery(Kaim::World* world);
    ...
protected:
    ...
    Kaim::Ptr<Kaim::AStarQuery<Kaim::DefaultTraverseLogic> >  m_astarQuery; // Not used for the entity, but simply to demonstrate how to run a query
    ...
};
...

bool MyGameLevel::Initialize(Kaim::World* world)
{ 
    ...
    m_astarQuery = *KY_NEW Kaim::AStarQuery<Kaim::DefaultTraverseLogic>;
    m_astarQuery->BindToDatabase(world->GetDatabase(0));
    ...
}
...

void MyGameLevel::TestAStarQuery(Kaim::World* world)
{
    // Choose two positions (in Navigation space) you want to test.
    // You can use the Navigation Lab to choose them.
    Kaim::Vec3f startPos = Kaim::Vec3f(-11.5963f,1.06987f,10.4563f);
    Kaim::Vec3f destPos  = Kaim::Vec3f(-16.636f,-26.7078f,8.10107f);

    // Leverage the visual debugging system.
    Kaim::ScopedDisplayList displayList(world, Kaim::DisplayList_Enable);
    displayList.InitSingleFrameLifespan("Test AStar Query", "My Game");
    displayList.PushLine(startPos, startPos + Kaim::Vec3f::UnitZ(), Kaim::VisualColor::Blue);
    displayList.PushLine(destPos,  destPos  + Kaim::Vec3f::UnitZ(), Kaim::VisualColor::Blue);

    if(m_astarQuery->m_processStatus == Kaim::QueryNotStarted)
    { 
        // Each AstarQuery must be set up to run on a specific Database. 
        m_astarQuery->Initialize(startPos, destPos);

        // Blocking means that we want the result immediately.
        // Alternatively, a query can be asynchronous and time-sliced. 
        m_astarQuery->PerformQueryBlocking();

    } else if (m_astarQuery->m_processStatus == Kaim::QueryDone)
    {
        // When the query is done, we ask for the result.
        Kaim::AStarQueryResult result = m_astarQuery->GetResult();

        // Kaim::AStarQueryResult enumerates many possible query results.
        // For now, let's focus on success.
        switch( result )
        {
        case Kaim::ASTAR_DONE_PATH_FOUND:
            {
                displayList.PushText(destPos + Kaim::Vec3f::UnitZ(), Kaim::VisualColor(0, 255, 0), "AStar query success !");
                break;
            }
        default:
            displayList.PushLine(startPos,  destPos , Kaim::VisualColor::Red);
            displayList.PushText(destPos + Kaim::Vec3f::UnitZ(), Kaim::VisualColor(255, 0, 0), "AStar query failed !");
            break;
        }

        // Here, we build and send a query, so it can be displayed into the NavigationLab.
        // cf. IQuery::SendVisualDebug() for more details.
        m_astarQuery->SendVisualDebug();
    }
}
...

void MyGameLevel::Update(float deltaTimeInSeconds)
{
    ...
    TestAStarQuery(m_entity.m_navBot->GetWorld());
    ...
}
...

void MyGameWorld::Update(float deltaTimeInSeconds)
{
    ...
    m_world->Update(deltaTimeInSeconds);
    m_gameLevel.Update(deltaTimeInSeconds);
}