GDK - Gamemode SDK for C/C++

Introduction

The GDK (Gamemode Development Kit) is a library that allows you to write SA-MP gamemodes in C/C++. It mirrors the Pawn scripting API provied by the SA-MP server and lets you handle various SA-MP events a.k.a callbacks in a similar fashion.

For the impatient, here is what it looks like in C++:

#include <stdio.h>
#include <string.h>

#include <sampgdk/a_players.h>
#include <sampgdk/a_samp.h>
#include <sampgdk/core.h>
#include <sampgdk/sdk.h>

void SAMPGDK_CALL PrintTickCountTimer(int timerid, void *params) {
  sampgdk::logprintf("Tick count: %d", GetTickCount());
}

PLUGIN_EXPORT bool PLUGIN_CALL OnGameModeInit() {
  SetGameModeText("Hello, World!");
  AddPlayerClass(0, 1958.3783f, 1343.1572f, 15.3746f, 269.1425f,
                 0, 0, 0, 0, 0, 0);
  SetTimer(1000, true, PrintTickCountTimer, 0);
  return true;
}

PLUGIN_EXPORT bool PLUGIN_CALL OnPlayerConnect(int playerid) {
  SendClientMessage(playerid, 0xFFFFFFFF, "Welcome to the HelloWorld server!");
  return true;
}

PLUGIN_EXPORT bool PLUGIN_CALL OnPlayerRequestClass(int playerid,
                                                    int classid) {
  SetPlayerPos(playerid, 1958.3783f, 1343.1572f, 15.3746f);
  SetPlayerCameraPos(playerid, 1958.3783f, 1343.1572f, 15.3746f);
  SetPlayerCameraLookAt(playerid, 1958.3783f, 1343.1572f, 15.3746f, CAMERA_CUT);
  return true;
}

PLUGIN_EXPORT bool PLUGIN_CALL OnPlayerCommandText(int playerid,
                                                   const char *cmdtext) {
  if (strcmp(cmdtext, "/hello") == 0) {
    char name[MAX_PLAYER_NAME];
    GetPlayerName(playerid, name, sizeof(name));
    char message[MAX_CLIENT_MESSAGE];
    sprintf(message, "Hello, %s!", name);
    SendClientMessage(playerid, 0x00FF00FF, message);
    return true;
  }
  return false;
}

Build Instructions

In order to build the GDK you first you need to download and install the following dependencies:

• SA-MP plugin SDK
• CMake 2.8.12+
• Python 2.7+
• PLY (Python Lex-Yacc) can be installed via pip
• C compiler
• C++ compiler (optional, for building example plugins)

Once all dependencies are installed you can use the following commands to build and install the library:

cd path/to/sampgdk
mkdir build && cd build
cmake .. -DSAMP_SDK_ROOT=path/to/sdk
cmake --build . --config Release
cmake --build . --config Release --target install

You can pass additional arguments to CMake and change one or more of the following options:

• SAMPGDK_STATIC - Build as static library (default is OFF)
• SAMPGDK_BUILD_PLUGINS - Build example plugins (default is OFF)
• SAMPGDK_BUILD_AMALGAMATION - Build amalgamation (default is OFF)
• SAMPGDK_BUILD_DOCS - Build Doxygen documentation (default is ON)

For example, to build GDK as a static library together with example plugins:

cmake .. -DSAMPGDK_STATIC=ON -DSAMPGDK_BUILD_PLUGINS=ON

The following built-in variables may also be useful:

• CMAKE_BUILD_TYPE - Bulid type: Debug, Release, RelWIthDebInfo, MinSizeRel
• CMAKE_INSTALL_PREFIX - Where to install files

For more information or questions about CMake please read the CMake FAQ.

Getting Started

You can start with downloading the source code and playing a little bit with the helloworld plugin. In case you need documentation it's available online here, in a browsable form, as well as in the GDK header files.

If you feel like making a new project there's a step-by-step guide on setting up a GDK project with CMake. No prior knowledge of CMake is required to follow it.

Using Git

If you know Git and you've already managed to build the library successfully the easiest way to get started is probably to clone this repo (if you haven't done so) and create a new local branch for your personal project:

git clone git://github.com/Zeex/sampgdk.git
git checkout -b my-project

and begin working on it right inside the GDK source tree. You could either edit the helloworld project or create a new project in a separate folder under the plugins/ directory. The latter is recommended as it would avoid possible merge conflicts if helloworld suddenly gets updated in upstream.

Later if you decide that it's time to update the library, say to version v1.2.3, you would simply fetch master from upstream and merge the changes into your project's branch:

git fetch origin master
git merge v1.2.3

License

Licensed under the Apache Licese version 2.0. See the LICENSE.txt file.