SpaceSim - Astrophysical Simulation Software

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SpaceSim is a particle-based simulation and rendering software primarily focused on astrophysical applications Important This is a non-realtime simulator Although low-resolution simulations are fast enough to be real-time simulations with millions of particles can take several hours to finish This is not a game It does not contain any game mechanics progression sandbox elements etc Please do not expect any gaming experience The goal of the project is to de-mystify scientific simulations and make them accessible to the general public SpaceSim uses the same approach albeit simplified and at lower resolution as the research simulations typically run on supercomputers but it can run on your desktop PC or laptop comes with an intuitive user interface and requires no extensive knowledge of mathematics physics or programming You can recreate some of the well-known simulations from the scientific literature such as the Moon-forming impact the formation of the ring system of Saturn or the DART kinetic impactor Or you can simply explore various initial conditions both grounded and realistic but also hypothetical what-if scenarios such as the collision of two planets made of matter and anti-matter.Fluid dynamics and gravitation Each deformable object in the simulation is discretized into particles that interact with each other through collisions by solving the Navier-Stokes equations and gravitational attraction Objects can also be rigid non-deformable they retain their shape which simplifies collisions between objects and optimizes simulation speed The particle-based solver is useful for simulating a number of astrophysical events such as the formation of planets from protoplanetary disks or the mutual interaction of galaxies Object customization The application has a number of object types planets stars asteroids disks clouds galaxies and more Each object has adjustable parameters that allow you to change its geometry materials appearance and simulation behavior The surface textures of planets and asteroids can be further tailored using procedural generation or by uploading custom images Or if you need even more control create your own objects using the Lua scripting language Black holes and white holes The renderer includes the effect of gravitational lensing bending the light rays that pass close to a black hole and creating realistic renderings of warped accretion disks duplicated images of objects behind black holes including other black holes or Einstein rings of galaxies Particle colors and gravity visualization SpaceSim provides additional insights into the simulation in a number of ways It can color particles based on values of a specific quantity velocity pressure material show the Roche limit indicating where satellites can have stable orbits or draw the potential field to see the gravity wells around celestial bodies Key features CPU and GPU simulation solver Optimized gravity simulation using the Barnes-Hut algorithm Simulation history store the entire simulation and replay it later Two render engines Real-time or Raymarcher Customizable camera paths with object tracking Lua scripting for custom objects and simulation systems Built-in video recording H.264 codec and various export options Alembic OpenVDB

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