botmoveonnavmesh.h

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/*
* Copyright 2016 Autodesk, Inc. All rights reserved.
* Use of this software is subject to the terms of the Autodesk license agreement and any attachments or Appendices thereto provided at the time of installation or download,
* or which otherwise accompanies this software in either electronic or hard copy form, or which is signed by you and accepted by Autodesk.
*/


#pragma once

#include "gwnavruntime/queries/moveonnavmeshquery.h"

namespace Kaim
{

class BotMoveOnNavMesh
{
public:
    template<class TraverseLogic>
    static Vec3f ComputeMoveOnNavMesh(const BotMoveOnNavMesh& input)
    {
        if(input.m_simulationTimeInSeconds == 0.0f)
            return input.m_currentPosition;

        // compute new position
        Kaim::Vec3f move = input.m_velocity * input.m_simulationTimeInSeconds;

        // query the navMesh to ensure that we are moving to a valid location
        Kaim::Vec2f move2d;
        KyFloat32 dist = move.GetNormalized2d(move2d);

        if(dist == 0.0f)
            return input.m_currentPosition;

        Kaim::MoveOnNavMeshQuery<TraverseLogic> query;
        query.BindToDatabase          (input.m_database);
        query.SetTraverseLogicUserData(input.m_traverseLogicUserData);
        query.Initialize              (input.m_currentPosition, move2d, dist);
        query.SetStartTrianglePtr     (input.m_navTrianglePtr); // initialize the StartTrianglePtr with the triangle the current position is upon
        query.PerformQuery();

        switch (query.GetResult())
        {
        case Kaim::MOVEONNAVMESH_NOT_INITIALIZED:
        case Kaim::MOVEONNAVMESH_NOT_PROCESSED:
            return input.m_currentPosition;

        case Kaim::MOVEONNAVMESH_DONE_START_OUTSIDE:
        case Kaim::MOVEONNAVMESH_DONE_START_NAVTAG_FORBIDDEN:
        case Kaim::MOVEONNAVMESH_DONE_START_LINKONEDGE_ERROR:
        case Kaim::MOVEONNAVMESH_DONE_LACK_OF_WORKING_MEMORY:
        case Kaim::MOVEONNAVMESH_DONE_UNKNOWN_ERROR:
            return input.m_currentPosition + move;

        case Kaim::MOVEONNAVMESH_DONE_ARRIVALPOS_FOUND_AFTER_COLLISION:
        case Kaim::MOVEONNAVMESH_DONE_INTERMEDIARYPOS_FOUND:
        case Kaim::MOVEONNAVMESH_DONE_ARRIVALPOS_FOUND_NO_COLLISION:
            return query.GetArrivalPos();

        default:
            break;
        }

        return input.m_currentPosition;
    }

public:
    Vec3f          m_currentPosition;
    Vec3f          m_velocity;
    KyFloat32      m_simulationTimeInSeconds;
    Database*      m_database;
    void*          m_traverseLogicUserData;
    NavTrianglePtr m_navTrianglePtr;
};

} // namespace Kaim