Navier-Stokes fluid simulation explained with Godot game engine

3 comments

• myzek3 days ago
  So once upon a time I stumbled upon simulating fluids in gamedev and I really wanted to learn how it works. Fast forward 2 months and I decided to write down everything I learned to hopefully make it easier for others in the future!
  • magicalhippo3 days ago
    Fluid sims are just so darn fun! Nice writeup, very accessible.<p>Couple of notes, I think you forgot to apply timestep when adding rocket exhaust velocity, pretty sure it should be<p><pre><code> u[idx] += backward.x * flame_velocity_amount * falloff * delta v[idx] += backward.y * flame_velocity_amount * falloff * delta </code></pre> You need to compensate by scaling up flame_velocity_amount, I used 85, seemed about the same.
    • myzek3 days ago
      Yeah it seems I missed that, adding the rocket at the end was a cherry on the top and I was so exhausted already I&#x27;m surprised it even works lol
      • magicalhippo2 days ago
        It made it very fun to play with though :D
  • nick__m16 minutes ago
    excellent article, great vulgarisation and human written !<p>Thank you
• frankdlc2223 days ago
  This is really cool. I love how much detail you went into explaining the setup and walking through each piece of the simulation. Definitely bookmarking this to play around with later!
• nryoo16 minutes ago
  [flagged]