README.md

OSP (OpenGL + C++ Experiments)

This repo hopes to become a space exploration game along the lines of Squad's Kerbal Space Program; as of today it's a place to experiment implementing different features in C++/OpenGL.

Features

(Those marked with a ✔️ are already implemented) (Those marked with a ♻️ are ongoing or started)

(The list may be expanded at any time)

✔️ Keplerian Orbit Simulator for on-rails solar system

• ✔️ Simulating elliptic orbits
• ♻️ Simulating parabolic and hyperbolic orbits (Not really neccesary for now)

Vessel Building and Controlling

• Vessel assembly from a list of parts
  • ♻️ Procedural parts
    • ♻️ Procedural Engines
      • ✔️ Nozzle simulator
      • Liquid fueled engines
      • Solid fueled engines
    • Procedural structures (tanks, fuselage...)
  • Pre-made parts
• Vessel controlling
  • ♻️ Navball
    • ✔️ Navball aligns with vessel
    • ♻️ Navball aligns to reference frames
  • S.A.S

♻️ Planetary Surfaces

• Either very big view distance or joining together multiple scaled cameras
• Rendering of planets from far away
  • Simple billboard shader
• ♻️ Rendering of planets from the surface and near space
  • ♻️ Near space rendering
    • ♻️ Rocky bodies
      • ♻️ Cubesphere rendering
        • Very complex cubespheres for asteroids and weird-shaped bodies
        • Not spheric planets (see above, could be related)
        • Very big scale shadow rendering (Per vertex?)
      • LOD
        • Seamless LOD transitions
        • Removing seams between quads
      • Atmospheres
        • Atmospheric shader
        • Seamless transition from space to ground
        • Clouds / Cloud shadows
    • Other bodies
      • Gas body rendering
        • Clouds and animations?

In-Vessel physics

• Rigidbody physics simulator
• Extraction of acceleration and rotation from the simulation
• Applying forces to the vessel from outside (Gravitational gradient?)
• Seamless transition from in-vessel physics to the orbit simulator
  • Maybe they don't need to be separated, but perfomance could suffer
• Interaction with the terrain system

♻️ Newtonian Orbit Simulator for vessels

• ✔️ Orbit propagation
• ✔️ Orbit predictor (threaded)
• ♻️ Maneouver planning
• Improving perfomance so many vessels can be simulated at high warp speeds

Modding

The engine is data-driven, so pretty much no hardcoded stuff. Custom behaviour may be implemented using a scripting language (lua, squirrel...), or even a bigger language like C# (Mono)

Screenshots (may be outdated)