RenderingEngine in C with OpenGL

Objectives:

• Simple OpenGL-Wrapper functions
  • Located in the engine-core
• Example applications that use the wrapper functions
  • Sandbox: Box-Picker (2D)
  • WrathGL: Terrain-Creator (3D)
  • PowderTrain: Falling-Sand-Simulation (2D)
• Written entirely in C
• Bulletpoints marked with (X) are already implemented

General functionalities

• Basic OpenGL-Wrapping (VAO, VBO, IBO, Shader, Texture, Errorhandling) (X)
• Windowcreation for 2D and 3D (X)
• GUI-Library (X)
• 2D Sprite-Renderer (X)
  • Instanced rendering (X)
• 3D Model-Renderer (X)
  • Dynamic mesh creation (X)
  • OBJ-Loading
• Text rendering (X)
  • Batch rendering system (X)
• Camerasystem (X)
• Audiomanager for sounds and backgroundmusic

Example applications

Sandbox App (2D)

  - GUI (X)
  - Box picking and placing (X)
     - Instanced rendering (X)
  - 2D Physics (X)
  - Liquids   
  - AI

WrathGL App (3D)

  - 3D Mesh creation (planes, tiles) (X)
  - Terrain creation (X)
     - Vertices (X)
        - Procedural generated with noise-function (X)
        - Dynamic and changeable (X)
        - Backgroundthread calculates new terrain (X)
        - Renderthread renders new terrain (X)
     - Colors (X)
        - Dynamic, based on height (X)
     - Lighting (X)
  - Water (X)

PowderTrain App (2D)

  - GUI (X)   
  - Pixel-Renderer (X)
  - Sand-Simulation (X)
     - Different materials/substances -> different reactions (X)

Credits

• log.c
• stb_image
• cglm
• glad
• FreeType
• Chipmunk2D
• GLFW

Using & Compiling

• Currently only for linux, using CMake as a buildsystem
  • Clone the repository
  • Install the dependencies (cglm, FreeType, Chipmunk2D, GLFW)
    • Take a look at the credits to find the repositories
  • mkdir build
  • cd build/
  • cmake ..
  • make
  • Run the demo applications

License

• This code is provided under a BSD-style license. See the file LICENSE for details

Structure of the example application "Sandbox"

• To show the collaboration of the different modules
• Just for visualization purposes, not UML conform

Look of the Sandbox App

Look of the WrathGL App

Look of the PowderTrain App