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   alcinnz (alcinnz@floss.social)'s status on Wednesday, 09-Jul-2025 13:16:08 JST alcinnz

   Particle simulations are a useful technique for livening up your computer animations!

   A particle here refers to a point which moves in a way, often in relation to nearby particles, that looks interesting in aggregate.
   The trick is to make each individual particle fast to update & render, such that you can fill the screen with as many as you want!

   Often, but not always, they render as images facing the screen.

   1/2!

   • Embed this notice
     alcinnz (alcinnz@floss.social)'s status on Wednesday, 09-Jul-2025 13:16:06 JST alcinnz

     in reply to

     My minds jumping to how Shrek (2001)'s cinematography was so often like "Ooooo, look at this fancy fluid sim!" Yawn!

     2.1/2.1 Fin!

     Haelwenn /элвэн/ :triskell: likes this.
   • Embed this notice
     alcinnz (alcinnz@floss.social)'s status on Wednesday, 09-Jul-2025 13:16:07 JST alcinnz

     in reply to

     The biggest challenge in making particle sims fast & thus appealing is in allowing particles to react to nearby particles.

     One solution is Spatial Hash Grids, where the scene's split into cubes, such that we can look up all particles in a cube by hashing the cube's coordinate. Look up all contiguous cubes as well to cut down how many other particles we examine when updating the position of each particle.

     Particle sims can be used to render hair/fur/grass, fire/liquid, & more!

     2/2.1!

   • Embed this notice
     Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Wednesday, 09-Jul-2025 13:18:29 JST Haelwenn /элвэн/ :triskell:

     in reply to
     @alcinnz Heh, reminds me of re-watching Toy Story few years ago with still quite having the mindset/context of the 2000's but then from time to time noticing how the CGI just aged.
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     alcinnz (alcinnz@floss.social)'s status on Thursday, 10-Jul-2025 01:44:29 JST alcinnz

     in reply to

     • Haelwenn /элвэн/ :triskell:

     @lanodan For the *most* part I find Toy Story still looks great to this day, but there's definite exceptions.

     Which highlights that PIXAR was right to make the story about toys in inside rooms!

     Haelwenn /элвэн/ :triskell: likes this.
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     Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Thursday, 10-Jul-2025 01:51:04 JST Haelwenn /элвэн/ :triskell:

     in reply to
     @alcinnz Oh yeah, Toy Story would have aged horribly badly if it wouldn't be centered on toys and having humans be kind of deformed+simplified like in cartoons so there isn't an uncanny valley effect.
     
     I think it more has aged in terms of the lack of chaos/entropy, specially in the outdoors scenes.