Real-time planetary collision sandbox powered by SPH physics: smash planets together and watch the destruction and its aftermath!

Space Crash Simulator is a real-time planetary collision sandbox powered by GPU-accelerated SPH (Smoothed Particle Hydrodynamics). Every planet, star, and fragment is built from interacting particles that deform, melt, and break apart under extreme forces.The simulator is designed as an open-ended tool rather than a traditional game. There are no missions or objectives. You set the initial conditions, run the simulation, and observe the results.You can control key physical parameters such as:<ul class="bb_ul"><li>particle count</li><li>particle mass</li><li>viscosity</li><li>impact velocity</li><li>spin and angular momentum</li></ul>Planets can be customized with built-in textures or user-imported images. A high-mass “black hole particle” is also available for experiments involving tidal disruption and extreme gravity.<h2 class="bb_tag" >Simulation Modes</h2>Two-Body Collisions Direct or glancing impacts between two celestial bodies.Three-Body Interactions Unpredictable gravitational dynamics where small differences in initial conditions produce very different outcomes.Protoplanetary Disc + Star Experiments involving accretion, disc formation, and early system evolution.Galaxy Mode Simplified large-scale interactions between galactic cores. This mode focuses on gravitational dynamics and does not apply full SPH fluid simulation due to scale.<h2 class="bb_tag" >Physics Approach</h2>Space Crash Simulator uses Smoothed Particle Hydrodynamics to model high-energy impacts and material flow. This method is commonly used in scientific simulation of fluids, pressure, and deformation. As a result, bodies behave like cohesive matter under stress rather than rigid objects. Fragmentation, shock fronts, stretching, and accretion emerge naturally from the underlying equations.<h2 class="bb_tag" >Intended Use</h2>The simulator is suited for players interested in:<ul class="bb_ul"><li>astrophysics</li><li>orbital mechanics</li><li>impact dynamics</li><li>scientific visualization</li><li>open-ended sandbox experimentation</li></ul>It is not a mission-based game and does not include a storyline, progression system, or competitive mechanics. The focus is entirely on constructing scenarios, adjusting parameters, and observing the physical behaviour that follows.

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