Moe - Minimalist OpenGL Engine

Moe is a set of C++ classes that simplifies the creation of an OpenGL application. It provides a easy method to load shaders and textures using a TOML file provided. It allows developers to focus on creating the application rather than micro-managing each file.

Create an OpenGL application

The example below shows how to create a small OpenGL-based app called MyApplication. First, create create settings.toml as shown below.

settings.toml

[shaders]

    # The shader program will be named shader1
    [shaders.shader1]
    vert = "vert_shader.vert"
    frag = "frag_shader.frag"


[textures]

# The texture will be named texture1
texture1 = "dirt.jpg"

Then, create class MyApplication and inherit class Engine. Implement the virtual functions.

MyApplication.h

# include "Engine.h"

class MyApplication : public moe::Engine
{
private:

    void RendorScene();            // Render the scene in each frame
    void ProcessKeyEvents();       // Implement logic for key inputs
    void ProcessMouseEvents();     // Implement logic for mouse inputs

public:
    
    void Initialize();             // Configure shaders, load models etc

};

MyApplication.cpp

void MyApplication::RendorScene() 
{
    // The base class Engine uses map and unique pointer manage shader and
    // textures. Next line shows how to use a shader program.
    shaders_.at("shader1")->Activate();

    // Similarly, to activate a texture, use the following code.
    unsigned int texture_unit = 0;
    textures_.at("texture1")->Activate(texture_unit);

    // Finally, we rendor an object that we created.
    objects_.at("object1")->Rendor();
}

Finally, in main.cpp, run MyApplication as such:

#include "MyApplication.h"

int main ()
{
    // some code above

    GLFWwindow* window = glfwCreateWindow(1280, 768, "Window", NULL, NULL);

    MyApplication app(window, "settings.toml");
    app.Initialize();
    app.Run();

    // some code below
}

It is recommended to take a look at the header files to understand what each class does.

Dependencies

Moe is depended on various libraries. Remember to link them in your source code.

Library	Description
GLFW	Window creation and mouse/keyboard inputs
glad	Modern OpenGL loader/generator
glm	Linear algebra for computer graphics
stb	Loading image files for texture generation
toml++	Reading settings from a TOML file

Note: stb is quite a large library. Moe only uses stb_image.h.