C API for PDAL now on GitHub

by Jaime SotoNo Comments
Simverge developed an application programming interface (API) in the C programming language for the Point Data Abstraction Library (PDAL) and published it under the BSD 3-Clause license at GitHub. PDAL is a library for point cloud data processing and analysis written in C++. The API exposes PDAL's JSON pipeline functionality just like the Python and Java bindings. Take a look at the unit tests for examples on how to use the API. A pdal-c package is also available for vcpkg and a conda-forge package is on its way. I hope that this library serves as a useful interface for other language bindings. Please submit an issue or pull request at GitHub if you have any suggestions! ...
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How to use protobuf with zlib compression in C++

by Jaime SotoNo Comments
It's been a while since my last post, where I explained how to build protobuf with zlib support. In this post I'll explain how you can use zlib-based streams in C++ to serialize and deserialize protobuf messages. We'll use a small Mona Lisa bitmap for this example, since its uncompressed format will compress well with zlib's default Deflate lossless compression algorithm. Take a look at Simverge/howto-protobuf-zlib in GitHub for a more complete implementation of this example. Define a Protobuf Message Schema First, let's create a file called blob.proto that defines a simple Protobuf message to store an arbitrary blob of data along with a string identifying its source: [crayon-6825ae67c3320814276043/] Compile blob.proto with the Protobuf compiler (protoc) using the instructions from the official Protobuf C++ tutorial. For example, the following command will generate the blob.pb.cc C++ source file and the blob.pb.h C++ header file in the same directory as blob.proto: [crayon-6825ae67c332b716197668/] You can instead use the FindProtobuf module if you are building with CMake, for example: [crayon-6825ae67c332e503217291/] Once blob.proto is...
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