bennetleff / physim

Physics Simulator written in D

#PhySim This project plans to be a physics simulator. It is written in D using Derelict's OpenGL bindings. Currently only the graphics backend is being written. This is a work in progress and features are constantly being added. #To-Do's The project is still young however a good chunk of necessary code for the graphics backend has been written.

• Meshes, Textures, Shaders, Prefabs
• Transformations
• User Input plus Camera Movement
• Basic Lighting (Point Lights, Directional Lights)
• Shadows
• Start working on Physics
• Past physics, TBD

#Libraries/Dependencies

• Assimp
• gl3n
• DerelictGL3
• DerelictSDL2

#Learning Resources I've decided to compile a growing list of helpful resources I've used inorder to help others learn and attribute credit to code I've learned from tutorials.

• TheBennyBox
• TomDalling
• Countless trips to the D Language forums and various articles on Game Engine Design.

physim's Issues

Rotation matrix causing translation

Rotations are causing meshes to translate rather than rotate on their local axis.

• One fix would be translating to center, rotating, the translating back.
• A problem found is that the translation and x/y/zrotation functions from gl3n return an identity matrix. I'm currently calling translation() and rotatex(), but if I call translation() then xrotation(), xrotation() will return an identity matrix allowing for rotation.
  • However, xrotation()'s return matrix will overwrite translation()
    meaning I can currently pick between proper rotation and translation but not both.