raylib-cpp

raylib-cpp is a C++ wrapper library for raylib, a simple and easy-to-use library to enjoy videogames programming. This C++ header provides object-oriented wrappers around raylib's struct interfaces.

Example

#include "raylib-cpp.hpp"

int main() {
    int screenWidth = 800;
    int screenHeight = 450;

    raylib::Window window(screenWidth, screenHeight, "raylib-cpp - basic window");
    raylib::Texture logo("raylib_logo.png");

    SetTargetFPS(60);

    while (!window.ShouldClose())
    {
        BeginDrawing();

        window.ClearBackground(RAYWHITE);

        DrawText("Congrats! You created your first window!", 190, 200, 20, LIGHTGRAY);

        // Object methods.
        logo.Draw(
            screenWidth / 2 - logo.GetWidth() / 2,
            screenHeight / 2 - logo.GetHeight() / 2);

        EndDrawing();
    }

    // UnloadTexture() and CloseWindow() are called automatically.

    return 0;
}

See the examples folder for more of the raylib examples that have been ported over to raylib-cpp.

Sample Applications

Ian Pan's Raylib Games

Features

There are a few conventions that raylib-cpp takes on when adopting raylib. See the raylib-cpp documentation for details on the entire API.

Constructors

Object constructors load raylib objects.

// raylib
Texture2D texture = LoadTexture("texture.png");

// raylib-cpp
raylib::Texture2D texture("texture.png");

Object Methods

When a raylib method has an object as one of its arguments, you can call the method on the object itself.

// raylib
Vector2 position(50, 50);
DrawPixelV(position, PURPLE);

// raylib-cpp
raylib::Vector2 position(50, 50);
position.DrawPixel(PURPLE);

Method Names

If a method's name contains an object's name, it is removed from its name to shorten the method name.

// raylib
DrawTexture(texture, 50, 50, WHITE);

// raylib-cpp
texture.Draw(50, 50, WHITE);

Optional Parameters

Many methods have optional parameters with sane defaults.

// raylib
DrawTexture(texture, 50, 50, WHITE);

// raylib-cpp
texture.Draw(50, 50); // WHITE is provided as the default tint.

Object Destructors

Objects will attempt to unload their respective raylib resources on destruction. This means no need to call Unload or Close methods. This applies to the window, textures, images, sounds, etc.

// raylib
InitWindow(640, 480, "Hello World");
CloseWindow();

// raylib-cpp
raylib::Window window(640, 480, "Hello World");
// window.Close() will be called automatically when the object is destructed.

Property Get/Set

Properties can be assigned through getter and setter methods. You still have access to the internal properties, however.

// raylib
Vector2 position;
position.x = 50;
position.y = 100;

// raylib-cpp
raylib::Vector2 position;
position.SetX(50);
position.SetY(100);

// ... or
position.x = 50;
position.y = 100;

Method Overrides

Many similar raylib method names have different name suffixes based on what arguments they take. With raylib-cpp, these cases use method overriding to allow using the same method names.

// raylib
Color color = GRAY;
DrawPixel(50, 50, color);
Vector2 position = {50.0f, 50.0f};
DrawPixelV(position, color); // Extra V in method name.

// raylib-cpp
raylib::Color color = raylib::Color::Gray();
color.DrawPixel(50, 50);
Vector2 position(50.0f, 50.0f);
color.DrawPixel(position); // No more V in method name.
position.DrawPixel(color); // Alternatively

Method Chaining

When there's a method that doesn't return anything, it'll instead return the object itself, allowing method chaining.

// raylib
Image cat = ImageLoad("cat.png");
ImageCrop(&cat, (Rectangle){ 100, 10, 280, 380 });
ImageFlipHorizontal(&cat);
ImageResize(&cat, 150, 200);

// raylib-cpp
raylib::Image cat("cat.png");
cat.Crop(100, 10, 280, 380)
   .FlipHorizontal()
   .Resize(150, 200);

Operators

There are operator overrides for objects.

// raylib
Vector2 position = {50, 50};
Vector2 speed = {10, 10};
position.x += speed.x;
position.y += speed.y;

// raylib-cpp
raylib::Vector2 position(50, 50);
raylib::Vector2 speed(10, 10);
position += speed; // Addition assignment operator override.

Vector-Based Returns

When there is a function that would return a pointer-array, there is a wrapper that allows returning a vector of objects instead.

// raylib
int count;
char** files = GetDirectoryFiles(".", &count);
printf("Count: %i\n", count);
for (int i = 0; i < count; i++) {
    printf("File: %s\n", files[i]);
}
ClearDirectoryFiles();

// raylib-cpp
std::vector<std::string> files = raylib::GetDirectoryFiles(".");
std::cout << "Count: " << files.size() << std::endl;
for (auto& file : files) {
    std::cout << "File: " << file << std::endl;
}

String Functions

Many of the raylib functions have std::string-related functions to allow calling them directly with std::strings to save having to use the .c_str() method.

// raylib
const char* url = "https://raylib.com";
OpenURL(url);

// raylib-cpp
std::string url = "https://raylib.com";
raylib::OpenURL(url);

RayMath

The raymath methods are included.

// raylib
Vector2 direction = {50, 50};
Vector2 newDirection = Vector2Rotate(direction, 30);

// raylib-cpp
raylib::Vector2 direction(50, 50);
raylib::Vector2 newDirection = direction.Rotate(30);

Getting Started

raylib-cpp is a header-only library. This means in order to use it, you must link your project to raylib, and then include include/raylib-cpp.hpp.

Set up a raylib project using the build and install instructions
Ensure C++ files are compiled with C++
Download raylib-cpp
Include include/raylib-cpp.hpp
```
#include "path/to/raylib-cpp.hpp"
```

Starter Projects

The projects directory includes some starter templates...

If there's a project template you would like to see added, feel free to make an issue and we can add it in.

Development

The following are some tools in order to build and contribute to raylib-cpp...

Compiling

raylib-cpp uses CMake as a primary target for development. To build it, and run the tests or examples, use...

git clone https://github.com/RobLoach/raylib-cpp.git
cd raylib-cpp
git submodule update --init
mkdir build
cd build
cmake ..
make
make test
./examples/core_basic_window

Documentation

To build the document with Doxygen, use...

doxygen projects/Doxygen/Doxyfile

Coding Standards

This uses cpplint to adopt coding standards.

cpplint --recursive include

Defines

RAYLIB_CPP_NO_MATH - When set, will skip adding the raymath.h integrations

License

raylib-cpp is licensed under an unmodified zlib/libpng license, which is an OSI-certified, BSD-like license that allows static linking with closed source software. Check LICENSE for further details.

msylvia / raylib-cpp Goto Github PK

raylib-cpp's Introduction