소스코드 부분 최적

https://twitter.com/MittringMartin/status/912817354827907073

Visual studio :
#pragma optimize( "", off )
 ..code..
#pragma optimize( "", on )


GCC 44.4 and up:
https://news.ycombinator.com/item?id=4711571

#pragma GCC push_options
#pragma GCC optimize ("O0")

memset(a, 0, 3); // .. code ..

#pragma GCC pop_options

c++ template 연습 몇가지.

#include <iostream>
#include <string>
#include <memory>

template<typename T>
void swap(T& a, T& b){
    T tmp = a;
    a = b;
    b = tmp;
}

template<typename T>
void print(T a){
    std::cout <<"print1 : " << a << std::endl;
}

template<typename T>
void print(T a, T b){
    std::cout <<"print2 : " << a <<", " << b << std::endl;
}

template<typename... Args>
void prints(Args... args){
    print(args...);
    return;
}

class C{
    public:
    template<typename... Args>
    static std::shared_ptr<C> create(Args&&... args){
        return std::shared_ptr<C>(new C(args...));
    }
   
    private:
    explicit C(const int& a, int& b){
        printf("construct C(%d, %d)\n", a, b);
        int tmp = a;
        //a = b;
        b = tmp;
    }
};

int main()
{
    int a = 10;
    int b = 20;
    prints(a);  // variadic templates
    prints(a,b);
   
    printf("before swap : %d, %d\n", a, b);
    swap(a,b); // == swap<int>(a,b)
    printf("after swap : %d, %d\n", a, b);

    std::shared_ptr<C> c1 = C::create(a, b);
    printf("after construct : %d, %d\n", a, b);
   
    return 1;
}

gdb tui 모드

GDB 강의
: https://www.youtube.com/watch?v=PorfLSr3DDI


ctrl+x, 1 : 소스코드만 표시
ctrl+x, 2 : 소스코드 + 어셈블리 표시

gdb -> tui  메뉴얼

https://sourceware.org/gdb/onlinedocs/gdb/TUI-Commands.html


gdb 어셈블  한줄씩 디버깅

https://stackoverflow.com/questions/2420813/using-gdb-to-single-step-assembly-code-outside-specified-executable-causes-error

유튜브 방송

https://obsproject.com/

for ubuntu 16.0.4

  sudo add-apt-repository ppa:obsproject/obs-studio
  sudo apt-get update
  sudo apt-get install obs-studio

리눅스에서 문서화

리눅스에서 코드 문서화 작업하려는데, Playonlinux로 office2016 설치 시도하다가 포기하고 만든 차선책.

1) 온라인 파워포인트
https://office.live.com/start/PowerPoint.aspx
윈도우 버전처럼 그림의 배경색제거, 3D 회전같은 기능은 지원안됨.

2) https://pixlr.com/editor/
위 단점들 보완을 위해 사용.
create new iamge - transparent 투명 배경 선택
ㄴ 파워포인트에서 다른 이미지와 조합을 고려함.

새 layout  생성
컴퓨터에서 이미지 파일 열기 - wand(W) 또는 lasso (L) 툴로 오려내기
* wand 비활성화 : Marquee(Q) == 사각형 잘라내기 선택후 레이아웃 아무 자리 클릭.
배경제거 복사 붙여넣기. etc..
edit - free transform - 꼭지점 크기조정 / 꼭지점에서 offset 10  ~ 30? 픽셀 위치에서 rotation
edit - free distortion - 꼭지점 위치 옮겨서 3D 회전 연출.

steam / ubuntu

playonlinux 설치
* apt-get install은 구버전
* 홈페이지에서 최신 deb 파일 설치

playonlinux 실행해서,
tools - manage wine versions - 2.22-staging
* apt install wine 대신  이걸로 설치.

카카오톡
Configure 아이콘 - new - 32bit windows
- 2.22-staging - kakao (virtual drive 이름 지정)

virtual drive 선택 - install components 탭 -
(gdiplus /riched20 / riched30 / wmp9 )
다운로드중 에러발생시 될때가지 retry

Wine 탭 - wine configure - window 7 이상


AOE2 HD
install - aoe2hd - 스팀설치까지
Wine 탭 - wine configure - window xp
General 탭 - Arguments : -no-cef-sandbox
이상 steam black screen 버그 해결

그다음 게임 다운로드 버그는

https://askubuntu.com/questions/1046951/when-downloading-a-windows-steam-game-over-ubuntu-wine-i-get-the-error-content

$cd ~

$vim .PlayOnLinux/wineprefix/AOE2HD/drive_c/Program\ Files/Steam/config/config.vdf

cip, cm 항목 밑에

"CS" "valve511.steamcontent.com;valve501.steamcontent.com;valve517.steamcontent.com;valve557.steamcontent.com;valve513.steamcontent.com;valve535.steamcontent.com;valve546.steamcontent.com;valve538.steamcontent.com;valve536.steamcontent.com;valve530.steamcontent.com;valve559.steamcontent.com;valve545.steamcontent.com;valve518.steamcontent.com;valve548.steamcontent.com;valve555.steamcontent.com;valve556.steamcontent.com;valve506.steamcontent.com;valve544.steamcontent.com;valve525.steamcontent.com;valve567.steamcontent.com;valve521.steamcontent.com;valve510.steamcontent.com;valve542.steamcontent.com;valve519.steamcontent.com;valve526.steamcontent.com;valve504.steamcontent.com;valve500.steamcontent.com;valve554.steamcontent.com;valve562.steamcontent.com;valve524.steamcontent.com;valve502.steamcontent.com;valve505.steamcontent.com;valve547.steamcontent.com;valve560.steamcontent.com;valve503.steamcontent.com;valve507.steamcontent.com;valve553.steamcontent.com;valve520.steamcontent.com;valve550.steamcontent.com;valve531.steamcontent.com;valve558.steamcontent.com;valve552.steamcontent.com;valve563.steamcontent.com;valve540.steamcontent.com;valve541.steamcontent.com;valve537.steamcontent.com;valve528.steamcontent.com;valve523.steamcontent.com;valve512.steamcontent.com;valve532.steamcontent.com;valve561.steamcontent.com;valve549.steamcontent.com;valve522.steamcontent.com;valve514.steamcontent.com;valve551.steamcontent.com;valve564.steamcontent.com;valve543.steamcontent.com;valve565.steamcontent.com;valve529.steamcontent.com;valve539.steamcontent.com;valve566.steamcontent.com;valve165.steamcontent.com;valve959.steamcontent.com;valve164.steamcontent.com;valve1611.steamcontent.com;valve1601.steamcontent.com;valve1617.steamcontent.com;valve1603.steamcontent.com;valve1602.steamcontent.com;valve1610.steamcontent.com;valve1615.steamcontent.com;valve909.steamcontent.com;valve900.steamcontent.com;valve905.steamcontent.com;valve954.steamcontent.com;valve955.steamcontent.com;valve1612.steamcontent.com;valve1607.steamcontent.com;valve1608.steamcontent.com;valve1618.steamcontent.com;valve1619.steamcontent.com;valve1606.steamcontent.com;valve1605.steamcontent.com;valve1609.steamcontent.com;valve907.steamcontent.com;valve901.steamcontent.com;valve902.steamcontent.com;valve1604.steamcontent.com;valve908.steamcontent.com;valve950.steamcontent.com;valve957.steamcontent.com;valve903.steamcontent.com;valve1614.steamcontent.com;valve904.steamcontent.com;valve952.steamcontent.com;valve1616.steamcontent.com;valve1613.steamcontent.com;valve958.steamcontent.com;valve956.steamcontent.com;valve906.steamcontent.com"

추가 후, steam 재실행

드라이브 열어서, AoK HD.exe -> Launcher.exe 

코딩/네이밍 컨벤션 툴

내 경우 c++은 구글 스타일 가이드, python은 pep8을 따르려고 한다.
다만, 주로 작업하는 언어가 boost python을 이용한 python + c++ 혼합이라 naming convention이 서로 충돌하기 때문에 c++, python 모두 naming convention은 pep8-naming convention으로 통일.

* Python을 쓰기 전에는 함수는 lower camelCase, 클래스는 upper CamelCase를 사용했는데, 생각해보니 opencv naming convention  영향을 많이 받은듯.

아래는 컨벤션 체크에 사용하려고 알아본 프로그램.

# c++
1-1 cpplint
https://github.com/cpplint/cpplint
* 구글 스타일 체크.
* 단점 :  네이밍 컨벤션 체크는 지원안함.

1-2 cncc
* https://github.com/mapbox/cncc
* 굉장히 단순한 파이썬 코드+정규식 정의로 c++ 네이밍 컨벤션을 체크해줌.
* 정규식으로 style파일을 만들어 프로젝트에서 약속한 네이밍 컨벤션을 지정할 수 있음.
* cpplint를 보완해서 쓰면 좋음.

# python
2-1 flake8
* http://flake8.pycqa.org/en/latest/index.html#quickstart
* 코딩 컨벤션 / 네이밍 컨벤션 모두 체크해줌.