Harold2017

/**
 * @brief   Mapping functions from Eigen data types to OpenCV
 * @author  Eugene Khvedchenya <ekhvedchenya@gmail.com>
 * @details This header file contains code snippet for easy mapping Eigen types to OpenCV and back with minimal overhead.
 * @more    computer-vision.talks.com/articles/mapping-eigen-to-opencv/
 * Features:
 *  - Mapping plain data types with no overhead (read/write access)
 *  - Mapping expressions via evaluation (read only acess)
 *
 * Known issues:

Harold2017

compile error occurs when link flann as follows:

[ 77%] Linking CXX executable ../../bin/ConvertPointCloud

Undefined symbols for architecture x86_64:

  "_LZ4_compress_HC_continue", referenced from:

Harold2017

Qt without Xcode

How to use Qt Creator for software development on macOS without having to install Xcode

Justification

Qt refuses to install on macOS unless Apple's Xcode is installed beforehand. This is unfortunate because:

Harold2017

// A simple quickref for Eigen. Add anything that's missing.
// Main author: Keir Mierle

#include <Eigen/Dense>

Matrix<double, 3, 3> A;               // Fixed rows and cols. Same as Matrix3d.
Matrix<double, 3, Dynamic> B;         // Fixed rows, dynamic cols.
Matrix<double, Dynamic, Dynamic> C;   // Full dynamic. Same as MatrixXd.
Matrix<double, 3, 3, RowMajor> E;     // Row major; default is column-major.
Matrix3f P, Q, R;                     // 3x3 float matrix.

Harold2017

mysql> create database db_name;
mysql> use db_name;
mysql> set autocommit=0;
mysql> source dump_file.sql;
mysql> commit;

Harold2017

template<class Vector3>
std::pair<Vector3, Vector3> best_plane_from_points(const std::vector<Vector3> & c)
{
	// copy coordinates to  matrix in Eigen format
	size_t num_atoms = c.size();
	Eigen::Matrix< Vector3::Scalar, Eigen::Dynamic, Eigen::Dynamic > coord(3, num_atoms);
	for (size_t i = 0; i < num_atoms; ++i) coord.col(i) = c[i];

	// calculate centroid
	Vector3 centroid(coord.row(0).mean(), coord.row(1).mean(), coord.row(2).mean());

Harold2017

replace Homebrew git repo

git -C "$(brew --repo)" remote set-url origin https://mirrors.ustc.edu.cn/brew.git

replace Homebrew Core git repo

git -C "$(brew --repo homebrew/core)" remote set-url origin https://mirrors.ustc.edu.cn/homebrew-core.git

replace Homebrew Cask git repo

git -C "$(brew --repo homebrew/cask)" remote set-url origin https://mirrors.ustc.edu.cn/homebrew-cask.git

replace Homebrew-bottles

Harold2017

cmake

compile libtcmalloc_minimal with Release-Patch

link libtcmalloc_minimal.lib in CMakeList

copy libtcmalloc_minimal.dll to execution folder

without cmake

Harold2017

# install vcpkg
git clone https://github.com/Microsoft/vcpkg
cd vcpkg
./bootstrap-vcpkg.sh -disableMetrics
sudo ln -s /xxx/vcpkg/vcpkg /usr/local/bin
vcpkg help

# use it in CMakeLists.txt
set(ENV{VCPKG_ROOT} "/xxx/vcpkg/vcpkg")

Harold2017

C++         3 hrs 24 mins  ██████████████████▍░░  87.7%
JSON        15 mins        █▍░░░░░░░░░░░░░░░░░░░   6.7%
CMake       12 mins        █░░░░░░░░░░░░░░░░░░░░   5.3%
Other       0 secs         ░░░░░░░░░░░░░░░░░░░░░   0.2%
C           0 secs         ░░░░░░░░░░░░░░░░░░░░░   0.1%