Lightnews — Scholar-powered news

Morten Vassvik

@vassvik.bsky.social

1.8K followers 1.6K following 770 posts

Simulation and rendering nerd. Co-founder and CTO @JangaFX Working on EmberGen and more. Discord: vassvik @[email protected]

Posts Media Videos Starter Packs

Pinned

Morten Vassvik @vassvik.bsky.social · Nov 16

Never to late for an introduction post, eh

Hi I'm Morten. I work at JangaFX, where I primarily work on EmberGen, but I occasionally work on our other tools as well.

I hope to eventually start posting more fluid sim and graphics content, hopefully even blogposts and some code too.

3 2 81

Morten Vassvik @vassvik.bsky.social · 1d

Fixed a bug and tried beefing up the voxel count: 1.275B active voxels, 3072x3136x1312 bounding box.

Realtime capture in the viewport on 4090.

The projection struggles a bit on this scale, so I brute forced it a bit, so it's a bit slower than it has to be. FMG to initialize should help a lot here.

Morten Vassvik @vassvik.bsky.social · 3d

Roughly 1800x1800x500 bounds if this was a dense sim, 134M (same as 512x512x512) active voxels towards the end. Roughly 3.5 GiB used by the entire app, should be able to push that below 3 GiB for this, maybe close to 2.5 GiB

1 5

Morten Vassvik @vassvik.bsky.social · 3d

Finally adding ground collisions

2 42

Reposted by Morten Vassvik

Topotoy Labs @topotoylabs.bsky.social · 12d

Extended my topology libs to work on non-Euclidean domains (spherical, toroidal, etc.) by turning mesh edges into geodesics. Below: Bridson's Poisson disk sampling across different domains.

#indiedev #gamedev #computergraphics #computationalgeometry #topology

2 7 48

Morten Vassvik @vassvik.bsky.social · 12d

Yes

Reposted by Morten Vassvik

Gil Damoiseaux @gaxil.bsky.social · 12d

Some progress on the VAT export in #illugen. Complex mesh animations can be imported in game engines ... (made with an internal build)
#VFXFriday #realtimevfx #vfx

2 17

Morten Vassvik @vassvik.bsky.social · 13d

Meaning trying to detect inside/out by any means on a mesh that isn't very "nice" is rough, and things that are usually out of sight out mind to an artist or someone who's made the mesh doesn't exactly make your job of voxelizing such meshes easier :D

Morten Vassvik @vassvik.bsky.social · 13d

Therein lies the madness that is sloppy meshes

1 1

Morten Vassvik @vassvik.bsky.social · 17d

I need to try some hysteresis for my sparse sim at some point

Morten Vassvik @vassvik.bsky.social · 18d

Few stills

1664x1568x576 bounding box, 536M active voxels. Roughly 65% sparsity.

Morten Vassvik @vassvik.bsky.social · 18d

Dimmer RGB colors

1 2

Morten Vassvik @vassvik.bsky.social · 18d

Bright Red-Blue-Yellow primaries

Morten Vassvik @vassvik.bsky.social · 18d

Some tests I did with hacking in mixbox (github.com/scrtwpns/mix...) support today

Left: RGB blending
Right: Mixbox blending

Interestingly I there's a lot to take from this for smoke scattering, which generally has an absorption component, so subtractive color mixing makes sense I think?

1 28

Morten Vassvik @vassvik.bsky.social · 19d

Tile* level

Morten Vassvik @vassvik.bsky.social · 19d

Time level yeah, and I have large tiles (so there's not a lot of tiles, max 64K by design). And I have a wave size of at least 32 (never heard of anything less, I swear!), so fetching 32 values at once and distributing them across a wave sort of fits nicely

Morten Vassvik @vassvik.bsky.social · 20d

A graph

Morten Vassvik @vassvik.bsky.social · 20d

Singly linked lists? Doubly linked lists? On the GPU?

I use 27-way linked lists on the GPU, and it's good and highly appropriate!

2 12