axmol/core/navmesh/NavMeshObstacle.cpp

/****************************************************************************
 Copyright (c) 2015-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
 Copyright (c) 2019-present Axmol Engine contributors (see AUTHORS.md).

 https://axmol.dev/

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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#include "navmesh/NavMeshObstacle.h"
#if defined(AX_ENABLE_NAVMESH)

#    include "navmesh/NavMesh.h"
#    include "2d/Node.h"
#    include "2d/Scene.h"
#    include "recast/DetourTileCache.h"

NS_AX_BEGIN

NavMeshObstacle* NavMeshObstacle::create(float radius, float height)
{
    auto ref = new NavMeshObstacle();
    if (ref->initWith(radius, height))
    {
        ref->autorelease();
        return ref;
    }
    AX_SAFE_DELETE(ref);
    return nullptr;
}

std::string_view NavMeshObstacle::getNavMeshObstacleComponentName()
{
    static std::string comName = "___NavMeshObstacleComponent___";
    return comName;
}

NavMeshObstacle::NavMeshObstacle()
    : _radius(0.0f), _height(0.0f), _syncFlag(NODE_AND_NODE), _obstacleID(-1), _tileCache(nullptr)
{}

ax::NavMeshObstacle::~NavMeshObstacle() {}

bool NavMeshObstacle::initWith(float radius, float height)
{
    _radius = radius;
    _height = height;
    setName(getNavMeshObstacleComponentName());
    return true;
}

void ax::NavMeshObstacle::removeFrom(dtTileCache* /*tileCache*/)
{
    _tileCache->removeObstacle(_obstacleID);
    _tileCache  = nullptr;
    _obstacleID = -1;
}

void ax::NavMeshObstacle::addTo(dtTileCache* tileCache)
{
    _tileCache = tileCache;
    Mat4 mat   = _owner->getNodeToWorldTransform();
    _tileCache->addObstacle(&mat.m[12], _radius, _height, &_obstacleID);
}

void ax::NavMeshObstacle::onExit()
{
    if (_obstacleID == -1)
        return;
    Component::onExit();
    auto scene = _owner->getScene();
    if (scene && scene->getNavMesh())
    {
        scene->getNavMesh()->removeNavMeshObstacle(this);
    }
}

void ax::NavMeshObstacle::onEnter()
{
    if (_obstacleID != -1)
        return;
    Component::onEnter();
    auto scene = _owner->getScene();
    if (scene && scene->getNavMesh())
    {
        scene->getNavMesh()->addNavMeshObstacle(this);
    }
}

void ax::NavMeshObstacle::postUpdate(float /*delta*/)
{
    if ((_syncFlag & OBSTACLE_TO_NODE) != 0)
        syncToNode();
}

void ax::NavMeshObstacle::preUpdate(float /*delta*/)
{
    if ((_syncFlag & NODE_TO_OBSTACLE) != 0)
        syncToObstacle();
}

void NavMeshObstacle::syncToNode()
{
    if (_tileCache)
    {
        auto obstacle = _tileCache->getObstacleByRef(_obstacleID);
        if (obstacle && obstacle->type == DT_OBSTACLE_CYLINDER)
        {
            auto& cylinder = obstacle->cylinder;
            Vec3 localPos  = Vec3(cylinder.pos[0], cylinder.pos[1], cylinder.pos[2]);
            if (_owner->getParent())
                _owner->getParent()->getWorldToNodeTransform().transformPoint(localPos, &localPos);
            _owner->setPosition3D(localPos);
            _radius = cylinder.radius;
            _height = cylinder.height;
        }
    }
}

void ax::NavMeshObstacle::setRadius(float radius)
{
    _radius = radius;
}

void ax::NavMeshObstacle::setHeight(float height)
{
    _height = height;
}

void NavMeshObstacle::syncToObstacle()
{
    if (_tileCache)
    {
        auto obstacle = _tileCache->getObstacleByRef(_obstacleID);
        if (obstacle && obstacle->type == DT_OBSTACLE_CYLINDER)
        {
            Mat4 mat       = _owner->getNodeToWorldTransform();
            auto& cylinder = obstacle->cylinder;
            if ((mat.m[12] != cylinder.pos[0] && mat.m[13] != cylinder.pos[1] && mat.m[14] != cylinder.pos[2]) ||
                cylinder.radius != _radius || cylinder.height != _height)
            {
                _tileCache->removeObstacle(_obstacleID);
                _tileCache->addObstacle(&mat.m[12], _radius, _height, &_obstacleID);
            }
        }
    }
}

NS_AX_END

#endif  // AX_ENABLE_NAVMESH