Method delMeshCallback

tests/cpp-tests/Source/Camera3DTest/Camera3DTest.cpp:904–931

}

void CameraCullingDemo::delMeshCallback(Object* sender)
{
    if (_row == 0)
        return;

    _layer3D->removeAllChildren();
    _objects.clear();

    --_row;
    for (int x = -_row; x < _row; x++)
    {
        for (int z = -_row; z < _row; z++)
        {
            auto sprite = MeshRenderer::create("MeshRendererTest/orc.c3b");
            sprite->setPosition3D(Vec3(x * 30.0f, 0.0f, z * 30.0f));
            _objects.emplace_back(sprite);
            _layer3D->addChild(sprite);
        }
    }

    // set layer mask.
    _layer3D->setCameraMask((unsigned short)CameraFlag::USER1);

    // update sprite number
    char szText[64];
    auto text = fmt::format_to_z(szText, "{} sprits", static_cast<int32_t>(_layer3D->getChildrenCount()));
    _labelMeshCount->setString(text);
}

void CameraCullingDemo::drawCameraFrustum()
{