| RDB 2

rdb-example-02-insert-points.cpp
/*
*******************************************************************************
*
* Copyright 2025 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-02-insert-points.cpp
* \author RIEGL LMS GmbH, Austria
* \brief RDB example 2: Insert 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 add some points.
* This example is based on the database of rdb-example-1-create-database.
*
* Build instructions see "interface/cpp/riegl/README.TXT".
*
*******************************************************************************
*/
#include <array>
#include <vector>
#include <random>
#include <cstdint>
#include <iostream>
#include <exception>
#include <riegl/rdb.hpp>
#include <riegl/rdb/default.hpp>
int main()
{
try
{
// New RDB library context
riegl::rdb::Context context;
// Access existing database
riegl::rdb::Pointcloud rdb(context);
riegl::rdb::pointcloud::OpenSettings settings;
rdb.open("pointcloud.rdbx", settings);
// Query some attribute details
using riegl::rdb::pointcloud::PointAttribute;
const PointAttribute detailsCoordinates = rdb.pointAttribute().get("riegl.xyz");
const PointAttribute detailsReflectance = rdb.pointAttribute().get("riegl.reflectance");
// Prepare random number generator (for dummy points)
std::uniform_real_distribution<double> randomCoordinates(
detailsCoordinates.minimumValue,
detailsCoordinates.maximumValue
);
std::uniform_real_distribution<float> randomReflectance(
float(detailsReflectance.minimumValue),
float(detailsReflectance.maximumValue)
);
std::default_random_engine rng;
// Before we can modify the database, we must start a transaction
riegl::rdb::pointcloud::TransactionScope transaction(
rdb, // point cloud object
"Import", // transaction title
"Point Importer v1.0" // software name
);
// Prepare point attribute buffers
const uint32_t BUFFER_SIZE = 10000; // point block/chunk size
const uint32_t POINT_COUNT = 150000; // total number of points
std::vector< std::array<double, 3> > bufferCoordinates(BUFFER_SIZE);
std::vector< float > bufferReflectance(BUFFER_SIZE);
// Start new insert query
riegl::rdb::pointcloud::QueryInsert query = rdb.insert();
// Tell insert query where to read the "reflectance" values from
if (0) // you can either specify the name of the point attribute...
{
query.bindBuffer(
"riegl.reflectance",
bufferReflectance
);
}
else // ...or use one of the constants from "riegl/rdb/default.hpp":
{
query.bindBuffer(
riegl::rdb::pointcloud::RDB_RIEGL_REFLECTANCE,
bufferReflectance
);
}
// Tell insert query where to read the point coordinates from
if (0) // buffers for vectors can be bound for all vector elements at once...
{
query.bindBuffer("riegl.xyz", bufferCoordinates);
}
else // ...or for each vector element separately:
{
// The 'stride' defines the number of bytes between the buffer
// locations of the attribute values of two consecutive points.
const int32_t stride = sizeof(bufferCoordinates[0]);
query.bindBuffer("riegl.xyz[0]", bufferCoordinates[0][0], stride);
query.bindBuffer("riegl.xyz[1]", bufferCoordinates[0][1], stride);
query.bindBuffer("riegl.xyz[2]", bufferCoordinates[0][2], stride);
}
// Insert points block-wise
for (uint32_t total = 0; total < POINT_COUNT;)
{
// Fill buffers with some random data
for (uint32_t i = 0; i < BUFFER_SIZE; i++)
{
bufferCoordinates[i][0] = randomCoordinates(rng);
bufferCoordinates[i][1] = randomCoordinates(rng);
bufferCoordinates[i][2] = randomCoordinates(rng);
bufferReflectance[i] = randomReflectance(rng);
}
// Actually insert points
total += query.next(BUFFER_SIZE);
static uint32_t block = 1;
std::cout << "block: " << block++ << ", "
<< "total: " << total << std::endl;
}
// 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
}
}