Volumetric Ground Clouds

[jK]

no, that would be particle fog.
this is raymarching fog.

[Anarchid]

no, that would be particle fog.

Maybe that "would" should be a "should":

Code: Select all

vec3 savannahFire(vec3 pos, float groundHeight, int timeSinceSpotStartedBurning)

This seems to basically do what mapClouds does in the actual topic.

[jK]

Code: Select all

vec3 savannahFire(vec3 pos, float groundHeight, int timeSinceSpotStartedBurning)

This seems to basically do what mapClouds does in the actual topic.

It returns a vec3 and not a opacity, indicating to me that it returns a pos -> it spawns new particles

[smoth]

Is it possible to have this extend beyond the map edge a bit rather than cut off abruptly?

[Anarchid]

Is it possible to have this extend beyond the map edge a bit rather than cut off abruptly?

The bounding box can be made to be larger than the map, or you could even make the volume infinite by putting it between two parallel planes, instead of inside a box. It doesn't do that atm because i didn't like how it looked.

It returns a vec3 and not a opacity, indicating to me that it returns a pos -> it spawns new particles

I think that's because a fire would have different colors in its volume, so it would make sense to return rgb to do that (under assumption that raymarch fires make sense).

[PicassoCT]

it returns a rgb value, indicating the colour of fire.. i forgot the opacity..

i thought i could estimate that out of "How long is this place on fire!" but then i would have needed wind in addition.

[jK]

[smoth]

That looks great JK any possibility you could fade the distant edge though? the sudden cutoff is a bit rough. Also what about cloud shadows on the ground?

[Anarchid]

Also what about cloud shadows on the ground?

It's possible to make them drop standard sharp spring shadows. That is either there is a shadow, or there is not.

[gajop]

Does Spring support "transparent" shadows? I think not.

[jK]

Does Spring support "transparent" shadows? I think not.

not yet, but I always wanted to implement it (it's not that complicated)

That looks great JK any possibility you could fade the distant edge though? the sudden cutoff is a bit rough.

[smoth]

cool! so, sky.jpg was an early version!

[1v0ry_k1ng]

I would love something like this to fill the 'pits' on Trojan hills/bandit plains with mist!

[Anarchid]

I've merged jK's changes, gonna be updating the instructions here and adding a readme to repo.

[qray]

I am currently working on a map where I would like to include this. So far it seems to work like a charm, but since I saw a few FIXMEs and TODOs in the code, I wanted to check if you consider it applicable in its current state or if I should better wait for future updates?

[Anarchid]

It should be usable in current state, and it's somewhat unlikely i'll get to the TODO's and FIXME's anytime soon.

P.S. three fragment shaders on one map? Some GPU's might end up looking like your screenshot

[qray]

THX for the quick reply!

three fragment shaders on one map? Some GPU's might end up looking like your screenshot

Was afraid of this too, but on my system (GTX 660, i5-3470) the framerate drop is not so bad and it's still well playable. And these 3 just fit so well together

[PicassoCT]

But what if the floor is lava?

[qray]

Just FYI: I noticed that the widget clashes with the map blueprint if the options "dawn" or "night" are used.

Infolog error message:

Code: Select all

[f=0000000] Failed to load: gfx_volumetric_clouds.lua  (error = 2, mapinfo.lua, error = 2, mapconfig/mapinfo/10_dawn.lua, [string "return mapinfo.lighting.groundambientcolor"]:1: attempt to index global 'mapinfo' (a nil value))