RDB 2
rdb-example-04-update-points.cpp
/*
*******************************************************************************
*
* Copyright 2023 RIEGL Laser Measurement Systems
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
*
*******************************************************************************
*/
/*!
*******************************************************************************
*
* \file rdb-example-04-update-points.cpp
* \author RIEGL LMS GmbH, Austria
* \brief RDB example 4: Update points
* \version 2015-10-14/AW: Initial version
* \version 2018-07-10/AW: Use new bindBuffer() instead of bind() function
*
* This example shows how to open an existing database and modify some points.
* This example is based on the database of rdb-example-1-create-database.
*
* Build instructions see "interface/cpp/riegl/README.TXT".
*
*******************************************************************************
*/
#include <vector>
#include <cstdint>
#include <iostream>
#include <exception>
#include <riegl/rdb.hpp>
int main()
{
try
{
// New RDB library context
// Access existing database
riegl::rdb::Pointcloud rdb(context);
rdb.open("pointcloud.rdbx", settings);
// Before we can modify the database, we must start a transaction
rdb, // point cloud object
"Update", // transaction title
"Point Classifier v1.0" // software name
);
// Prepare point attribute buffers
static const uint32_t BUFFER_SIZE = 10000;
std::vector< uint64_t > bufferPointNumber(BUFFER_SIZE);
std::vector< uint16_t > bufferPointClass (BUFFER_SIZE);
// Start new select query to get point id of points with reflectance below -20 dB
riegl::rdb::pointcloud::QuerySelect select = rdb.select("riegl.reflectance < -20.0");
select.bindBuffer(riegl::rdb::pointcloud::RDB_RIEGL_ID, bufferPointNumber);
// Start new update query and define buffers
update.bindBuffer(riegl::rdb::pointcloud::RDB_RIEGL_ID, bufferPointNumber);
update.bindBuffer(riegl::rdb::pointcloud::RDB_RIEGL_CLASS, bufferPointClass);
// Process all points block-wise
while (const uint32_t count = select.next(BUFFER_SIZE))
{
// Define new point class
for (uint32_t i = 0; i < count; i++)
{
bufferPointClass[i] = 7;
}
// Actually update points
update.next(count);
}
// Finally commit transaction
transaction.commit();
// Success
return 0;
}
catch(const riegl::rdb::Error &error)
{
std::cerr << error.what() << " (" << error.details() << ")" << std::endl;
return 1; // error
}
catch(const std::exception &error)
{
std::cerr << error.what() << std::endl;
return 1; // error
}
}
riegl::rdb::pointcloud::QueryUpdate::bindBuffer
void bindBuffer(const std::string &attribute, const ValueType &buffer, const std::int32_t stride=0)
Bind attribute buffer.
Definition: queryUpdate.hpp:141
riegl::rdb::Pointcloud::open
void open(const std::string &location, const pointcloud::OpenSettings &settings)
Open existing database.
riegl::rdb::Error::details
virtual const char * details() const RDB_NO_EXCEPT
Get error details.
riegl::rdb::pointcloud::TransactionScope::commit
void commit()
Commit transaction.
Definition: transactionScope.hpp:108
riegl::rdb::pointcloud::OpenSettings
Database open settings.
Definition: openSettings.hpp:61
riegl::rdb::Error::what
virtual const char * what() const RDB_NO_EXCEPT
Get error text.
riegl::rdb::pointcloud::QueryUpdate::next
std::uint32_t next(std::uint32_t count)
Update points.
riegl::rdb::pointcloud::TransactionScope
Point cloud transaction scope helper class.
Definition: transactionScope.hpp:59
riegl::rdb::Pointcloud
Main point cloud database class.
Definition: pointcloud.hpp:89
rdb.hpp
Main RDB library include file.
riegl::rdb::pointcloud::QuerySelect::next
std::uint32_t next(std::uint32_t count)
Select points.
riegl::rdb::pointcloud::QueryUpdate
Point update query.
Definition: queryUpdate.hpp:66
riegl::rdb::pointcloud::QuerySelect::bindBuffer
void bindBuffer(const std::string &attribute, ValueType &buffer, const std::int32_t stride=0)
Bind attribute buffer.
Definition: querySelect.hpp:142
default.hpp
Master include file for RIEGL defaults.
riegl::rdb::Pointcloud::select
pointcloud::QuerySelect select(const std::string &filter=std::string())
Select points.
riegl::rdb::Error
Database error class.
Definition: error.hpp:61
riegl::rdb::Pointcloud::update
pointcloud::QueryUpdate update()
Update points.
riegl::rdb::pointcloud::QuerySelect
Point select query.
Definition: querySelect.hpp:69
riegl::rdb::Context
Library context.
Definition: context.hpp:75