Grant Kot

Space demo: | | physics

[Grant Kot @kotsoft]

another little planet

[Grant Kot @kotsoft]

added surface tension and a couple new materials.

[Grant Kot @kotsoft]

@DanzNewz Yes I really want to soon. At the moment the data structuring for the materials is still changing around (but almost settled). Once that is done I can simply snapshot material params and settings.

[Grant Kot @kotsoft]

fusion

[Dan Gidlow 🦇🏳️‍🌈 @DanzNewz]

@kotsoft The fact that my central star radiates is crazy! Having multiple planetoids orbit naturally and being able to see their elemental makeup... such an incredible sim. Scratches my brain in a really fun way. 😄🌞

[Grant Kot @kotsoft]

@DanzNewz Nice! Awesome that you got it to that stage of solar system formation!

[Grant Kot @kotsoft]

@1982Santana109 Yeah I’d be open to suggestions. I can’t guarantee the accuracy of my sims as this is mostly being developed as a toy but maybe they can provide rough insights

[Grant Kot @kotsoft]

@tsupdawgs i added heating due to compression (which happens as i keep feeding the center with hydrogen)
once it gets to some temperature, the hydrogen reacts with itself to form helium (simpified fusion rules for realtime-sake)
as it reacts the sim emits light.

[Grant Kot @kotsoft]

@sentient_Mas Mostly just custom WebAssembly + WebGL2, and the UI is React with shadcn/base ui.

[Grant Kot @kotsoft]

@insanovic At the moment it’s on the edge of stability so I don’t know if the timestep can be increased much (I could add a slowmo feature though). There are the new sliders for nbody in the settings which can maybe help speed up the orbits.

[Grant Kot @kotsoft]

Orbits from n-body simulation
Added sliders for G and softening (so planets don't collapse too easily).

[Grant Kot @kotsoft]

@DEM7701 I’m working things out in 2d and then I can do 3d later on. 2d is also useful since people can see all the cross section internals at all times

[Grant Kot @kotsoft]

@amyneurons Thanks! It’s a combination of Material Point Method and n-body gravity for physics and radiance cascades for lighting

[Grant Kot @kotsoft]

chemical reaction between sodium and water

[Grant Kot @kotsoft]

@kvickart Yeah I think this is why I build this sim in the open because there are people who know far more than me on the chemistry and even physics side. A couple people pointed out I’m not properly modeling the Coulomb explosion so I will try to introduce charge soon

[Grant Kot @kotsoft]

Yeah this sim is not handling Coulomb explosion. I think I will need to add the concept of charged particles. I think at the time of reaction because of ionization the sodium becomes positively charged and the particles need to shoot outwards thus greatly increasing contact with the water. Still lots of work to do

[Grant Kot @kotsoft]

@BenediktHolm @cemdemir I think the creator mentioned they’re running on a simple plane so maybe it’s the height of the player not staying constant above the terrain?

[Grant Kot @kotsoft]

The red is lava and where it meets the water there is some heat transfer producing basalt and steam. The materials have a gradient based on temperature to help visualize convection (water goes from blue to lighter greenish-blue). I think some of the white coming down is one of the reaction products, sodium hydroxide. I definitely need to add something to the cursor to better identify materials.

[Grant Kot @kotsoft]

@DevZippy Yeah black holes are supported. It can be fun to form several even.

[Grant Kot @kotsoft]

@codetaur Thanks! I also really like your creations