Hand Made Hero Day 1

A following along for HMH day 1

Guowei Lv

2 minute read

Project Setup

Use the command subst to create an alias to the working directory:

subst w: C:\Users\lv\work

Our project is actually created inside the work directory like this: \work\handmadehero.

Inside handmadehero, create two folders misc and code.

Inside code, create file win32_handmade.cpp.

Windows Entry Point

All windows program has a entry point as follows, just put it in our code.

int CALLBACK WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                     LPSTR lpCmdLine, int nCmdShow) {
  return 0;
}

How to Build

We build our project from command line. The compiler in Windows we are using is called cl. But it is not on the path by default. So you have to exec a bat file to make it usable.

@echo off
call "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\vcvarsall.bat" x64
set path=w:\handmadehero\misc;%path%

Configure the cmd to automatically call this at start up by modifying the target in properties to

%windir%\system32\cmd.exe /k W:\handmadehero\misc\shell.bat

Now close and reopen the cmd and you should be able to call cl.

We also can lauch emacs from cmd.

Create a emacs.bat in misc folder:

@echo off
call "C:\Program Files\emacs\bin\runemacs.exe"

Since misc folder is in the path, you should now be able to type “emacs” to lauch it.

Let’s create a build.bat inside code.

@echo off
mkdir ..\..\build
pushd ..\..\build
cl -Zi ..\handmadehero\code\win32_handmade.cpp
popd

Make a data directory in handmadehero to put all the things needed for the game.

Now launch the VisualStudio by calling

devenv w:\build\win32_handmade.exe

Right click on the solution, and change the working directory to the new data directory.

Now let’s add a dialog. 

#include <stdint.h>
#include <windows.h>
int CALLBACK WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
                     LPSTR lpCmdLine, int nCmdShow) {
  MessageBox(0, "This is Handmade Hero", "Handmade Hero", MB_OK|MB_ICONINFORMATION);
  return 0;
}

We have to also modify the build script to cl -Zi ..\handmadehero\code\win32_handmade.cpp user32.lib.

~The End~

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