axmol/tests/cpp-tests/Classes/TerrainTest/TerrainTest.cpp

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 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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#include "TerrainTest.h"

USING_NS_CC;

TerrainTests::TerrainTests()
{
    ADD_TEST_CASE(TerrainSimple);
    ADD_TEST_CASE(TerrainWalkThru);
    ADD_TEST_CASE(TerrainWithLightMap);
}

Vec3 camera_offset(0, 45, 60);
#define PLAYER_HEIGHT 0

TerrainSimple::TerrainSimple()
{
    Size visibleSize = Director::getInstance()->getVisibleSize();

    // use custom camera
    _camera = Camera::createPerspective(60, visibleSize.width / visibleSize.height, 0.1f, 800);
    _camera->setCameraFlag(CameraFlag::USER1);
    _camera->setPosition3D(Vec3(-1, 1.6f, 4));
    addChild(_camera);

    Terrain::DetailMap r("TerrainTest/dirt.jpg"), g("TerrainTest/Grass2.jpg"), b("TerrainTest/road.jpg"),
        a("TerrainTest/GreenSkin.jpg");

    Terrain::TerrainData data("TerrainTest/heightmap16.jpg", "TerrainTest/alphamap.png", r, g, b, a);

    _terrain = Terrain::create(data, Terrain::CrackFixedType::SKIRT);
    _terrain->setLODDistance(3.2f, 6.4f, 9.6f);
    _terrain->setMaxDetailMapAmount(4);
    addChild(_terrain);
    _terrain->setCameraMask(2);
    _terrain->setDrawWire(false);
    auto listener            = EventListenerTouchAllAtOnce::create();
    listener->onTouchesMoved = CC_CALLBACK_2(TerrainSimple::onTouchesMoved, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
    //     add Particle3D for test blend
    auto rootps = PUParticleSystem3D::create("Particle3D/scripts/mp_torch.pu");
    rootps->setCameraMask((unsigned short)CameraFlag::USER1);
    rootps->startParticleSystem();

    this->addChild(rootps, 0, 0);
}

std::string TerrainSimple::title() const
{
    return "Terrain with skirt";
}

std::string TerrainSimple::subtitle() const
{
    return "Drag to walkThru";
}

void TerrainSimple::onTouchesMoved(const std::vector<cocos2d::Touch*>& touches, cocos2d::Event* event)
{
    float delta           = Director::getInstance()->getDeltaTime();
    auto touch            = touches[0];
    auto location         = touch->getLocation();
    auto PreviousLocation = touch->getPreviousLocation();
    Point newPos          = PreviousLocation - location;

    Vec3 cameraDir;
    Vec3 cameraRightDir;
    _camera->getNodeToWorldTransform().getForwardVector(&cameraDir);
    cameraDir.normalize();
    cameraDir.y = 0;
    _camera->getNodeToWorldTransform().getRightVector(&cameraRightDir);
    cameraRightDir.normalize();
    cameraRightDir.y = 0;
    Vec3 cameraPos   = _camera->getPosition3D();
    cameraPos += cameraDir * newPos.y * 0.5 * delta;
    cameraPos += cameraRightDir * newPos.x * 0.5 * delta;
    _camera->setPosition3D(cameraPos);
}

std::string TerrainWalkThru::title() const
{
    return "Player walk around in terrain";
}

std::string TerrainWalkThru::subtitle() const
{
    return "touch to move";
}

TerrainWalkThru::TerrainWalkThru()
{
    auto listener            = EventListenerTouchAllAtOnce::create();
    listener->onTouchesBegan = CC_CALLBACK_2(TerrainWalkThru::onTouchesBegan, this);
    listener->onTouchesEnded = CC_CALLBACK_2(TerrainWalkThru::onTouchesEnd, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);

    Size visibleSize = Director::getInstance()->getVisibleSize();

    // use custom camera
    _camera = Camera::createPerspective(60, visibleSize.width / visibleSize.height, 0.1f, 200);
    _camera->setCameraFlag(CameraFlag::USER1);
    addChild(_camera);

    Terrain::DetailMap r("TerrainTest/dirt.jpg"), g("TerrainTest/Grass2.jpg", 10), b("TerrainTest/road.jpg"),
        a("TerrainTest/GreenSkin.jpg", 20);

    Terrain::TerrainData data("TerrainTest/heightmap16.jpg", "TerrainTest/alphamap.png", r, g, b, a, Size(32, 32),
                              40.0f, 2);
    _terrain = Terrain::create(data, Terrain::CrackFixedType::SKIRT);
    _terrain->setMaxDetailMapAmount(4);
    _terrain->setCameraMask(2);
    _terrain->setDrawWire(false);

    _terrain->setSkirtHeightRatio(3);
    _terrain->setLODDistance(64, 128, 192);
    _player = Player::create("MeshRendererTest/girl.c3b", _camera, _terrain);
    _player->setCameraMask(2);
    _player->setScale(0.08f);
    _player->setPositionY(_terrain->getHeight(_player->getPositionX(), _player->getPositionZ()) + PLAYER_HEIGHT);

    // add Particle3D for test blend
    auto rootps = PUParticleSystem3D::create("Particle3D/scripts/mp_torch.pu");
    rootps->setCameraMask((unsigned short)CameraFlag::USER1);
    rootps->setScale(30.0f);
    rootps->startParticleSystem();
    _player->addChild(rootps);

    // add BillBoard for test blend
    auto billboard = BillBoard::create("Images/btn-play-normal.png");
    billboard->setPosition3D(Vec3(0, 180, 0));
    billboard->setCameraMask((unsigned short)CameraFlag::USER1);
    _player->addChild(billboard);

    auto animation = Animation3D::create("MeshRendererTest/girl.c3b", "Take 001");
    if (animation)
    {
        auto animate = Animate3D::create(animation);
        _player->runAction(RepeatForever::create(animate));
    }

    _camera->setPosition3D(_player->getPosition3D() + camera_offset);
    _camera->setRotation3D(Vec3(-45, 0, 0));

    addChild(_player);
    addChild(_terrain);
}

void TerrainWalkThru::onTouchesBegan(const std::vector<cocos2d::Touch*>& touches, cocos2d::Event* event) {}

void TerrainWalkThru::onTouchesEnd(const std::vector<cocos2d::Touch*>& touches, cocos2d::Event* event)
{
    auto touch    = touches[0];
    auto location = touch->getLocationInView();
    if (_camera)
    {
        if (_player)
        {
            Vec3 nearP(location.x, location.y, 0.0f), farP(location.x, location.y, 1.0f);

            auto size = Director::getInstance()->getWinSize();
            _camera->unproject(size, &nearP, &nearP);
            _camera->unproject(size, &farP, &farP);
            Vec3 dir = farP - nearP;
            dir.normalize();
            Vec3 collisionPoint(-999, -999, -999);
            bool isInTerrain = _terrain->getIntersectionPoint(Ray(nearP, dir), collisionPoint);
            if (!isInTerrain)
            {
                _player->idle();
                return;
            }
            dir   = collisionPoint - _player->getPosition3D();
            dir.y = 0;
            dir.normalize();
            _player->_headingAngle = -1 * acos(dir.dot(Vec3(0, 0, -1)));
            dir.cross(dir, Vec3(0, 0, -1), &_player->_headingAxis);
            _player->_targetPos = collisionPoint;
            _player->forward();
        }
    }
}

bool Player::isDone() const
{
    return false;
}

void Player::update(float dt)
{
    auto player = (MeshRenderer*)this;
    switch (_playerState)
    {
    case PLAYER_STATE_IDLE:
        break;
    case PLAYER_STATE_FORWARD:
    {
        Vec3 curPos     = player->getPosition3D();
        Vec3 newFaceDir = _targetPos - curPos;
        newFaceDir.y    = 0.0f;
        newFaceDir.normalize();
        Vec3 offset = newFaceDir * 25.0f * dt;
        curPos += offset;
        player->setPosition3D(curPos);
    }
    break;
    case PLAYER_STATE_BACKWARD:
    {
        Vec3 forward_vec;
        player->getNodeToWorldTransform().getForwardVector(&forward_vec);
        forward_vec.normalize();
        player->setPosition3D(player->getPosition3D() - forward_vec * 15 * dt);
    }
    break;
    case PLAYER_STATE_LEFT:
    {
        player->setRotation3D(player->getRotation3D() + Vec3(0, 25 * dt, 0));
    }
    break;
    case PLAYER_STATE_RIGHT:
    {
        player->setRotation3D(player->getRotation3D() + Vec3(0, -25 * dt, 0));
    }
    break;
    default:
        break;
    }
    // transform player position to world coord
    auto playerPos      = player->getPosition3D();
    auto playerModelMat = player->getParent()->getNodeToWorldTransform();
    playerModelMat.transformPoint(&playerPos);
    Vec3 Normal;
    float player_h = _terrain->getHeight(playerPos.x, playerPos.z, &Normal);
    if (Normal.isZero())  // check the player whether is out of the terrain
    {
        player_h = playerPos.y;
    }
    else
    {
        player_h += PLAYER_HEIGHT;
    }
    player->setPositionY(player_h);
    Quaternion q2;
    q2.createFromAxisAngle(Vec3(0, 1, 0), (float)-M_PI, &q2);

    Quaternion headingQ;
    headingQ.createFromAxisAngle(_headingAxis, _headingAngle, &headingQ);
    player->setRotationQuat(headingQ * q2);
    auto vec_offset = Vec4(camera_offset.x, camera_offset.y, camera_offset.z, 1);
    vec_offset      = player->getNodeToWorldTransform() * vec_offset;
    _cam->setPosition3D(player->getPosition3D() + camera_offset);
    updateState();
}

void Player::turnLeft()
{
    _playerState = PLAYER_STATE_LEFT;
}

void Player::turnRight()
{
    _playerState = PLAYER_STATE_RIGHT;
}

void Player::idle()
{
    _playerState = PLAYER_STATE_IDLE;
}

void Player::forward()
{
    _playerState = PLAYER_STATE_FORWARD;
}

void Player::backward()
{
    _playerState = PLAYER_STATE_BACKWARD;
}

void Player::updateState()
{
    auto player = (MeshRenderer*)this;
    switch (_playerState)
    {
    case PLAYER_STATE_FORWARD:
    {
        Vec2 player_pos = Vec2(player->getPositionX(), player->getPositionZ());
        Vec2 targetPos  = Vec2(_targetPos.x, _targetPos.z);
        auto dist       = player_pos.distance(targetPos);
        if (dist < 1)
        {
            _playerState = PLAYER_STATE_IDLE;
        }
    }
    break;
    default:
        break;
    }
}

Player* Player::create(const char* file, Camera* cam, Terrain* terrain)
{
    //
    auto player = new Player();
    if (player->initWithFile(file))
    {
        player->_headingAngle = 0;
        player->_playerState  = PLAYER_STATE_IDLE;
        player->_cam          = cam;
        player->_terrain      = terrain;
        player->autorelease();
        player->scheduleUpdate();
        return player;
    }
    CC_SAFE_DELETE(player);
    return nullptr;
}

TerrainWithLightMap::TerrainWithLightMap()
{
    Size visibleSize = Director::getInstance()->getVisibleSize();

    // use custom camera
    _camera = Camera::createPerspective(60, visibleSize.width / visibleSize.height, 0.1f, 800);
    _camera->setCameraFlag(CameraFlag::USER1);
    _camera->setPosition3D(Vec3(-1, 1.6f, 4));
    addChild(_camera);

    Terrain::DetailMap r("TerrainTest/dirt.jpg"), g("TerrainTest/Grass2.jpg"), b("TerrainTest/road.jpg"),
        a("TerrainTest/GreenSkin.jpg");

    Terrain::TerrainData data("TerrainTest/heightmap16.jpg", "TerrainTest/alphamap.png", r, g, b, a);

    _terrain = Terrain::create(data, Terrain::CrackFixedType::SKIRT);
    _terrain->setLODDistance(3.2f, 6.4f, 9.6f);
    _terrain->setMaxDetailMapAmount(4);
    addChild(_terrain);
    _terrain->setCameraMask(2);
    _terrain->setDrawWire(false);
    _terrain->setLightMap("TerrainTest/Lightmap.png");
    auto listener            = EventListenerTouchAllAtOnce::create();
    listener->onTouchesMoved = CC_CALLBACK_2(TerrainWithLightMap::onTouchesMoved, this);
    _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
}
std::string TerrainWithLightMap::title() const
{
    return "Terrain using light map";
}
std::string TerrainWithLightMap::subtitle() const
{
    return "Drag to walkThru";
}
void TerrainWithLightMap::onTouchesMoved(const std::vector<cocos2d::Touch*>& touches, cocos2d::Event* event)
{
    float delta           = Director::getInstance()->getDeltaTime();
    auto touch            = touches[0];
    auto location         = touch->getLocation();
    auto PreviousLocation = touch->getPreviousLocation();
    Point newPos          = PreviousLocation - location;

    Vec3 cameraDir;
    Vec3 cameraRightDir;
    _camera->getNodeToWorldTransform().getForwardVector(&cameraDir);
    cameraDir.normalize();
    cameraDir.y = 0;
    _camera->getNodeToWorldTransform().getRightVector(&cameraRightDir);
    cameraRightDir.normalize();
    cameraRightDir.y = 0;
    Vec3 cameraPos   = _camera->getPosition3D();
    cameraPos += cameraDir * newPos.y * 0.5 * delta;
    cameraPos += cameraRightDir * newPos.x * 0.5 * delta;
    _camera->setPosition3D(cameraPos);
}