FAST TorchLight

this isn't truely a torch, im just trying to make something work, i've posted this code and someone could build on it?

this should work on ALL scenes! no matter what tho
its a very poor attempt to make a doom3 torch light tho

http://www.neochrome.co.uk/fhr.rar



there is a video clip of this too

http://www.neochrome.co.uk/fstdemo.mpg

the video clip rins at 25 FPS, using fraps, do know that the frame rate on THIS computer reaches 400+ FPS

1024 x 768, 32 Bit depth

i release this code free to use! if anyone can improve on this tho, i would like your updates ;)

this is probably my first every (semi usefull) demo

this doesn't DO shadows as of yet. THAT one hasn't light-bulbed me yet
im working on something for that tho

That is d**n clever.

What did you use to make the BSP world?
And does it work with non-BSP i.e. .3DS or .B3D rooms?

i should imagine so!
im using GTKRadient for BSP

im told that there arn't any issues with licencing anyways now.

but i see no reason for this to be limited to BSP
just a few tweeks on the code...
have you tried to code for your self?

this is highly experimental i dont know if it will work on other graphics, im assuming i've used the very basics of blitz to achieve this tho.

not quite Doom3 but it could be usefull?

Fast but looks like a sniper rifle scope. I would use texture projection instead.

very good! you see: you dont need a stencil buffer for that. also stenciled torch light would be slow and hard-edged. so a texture would do it much better...
you even managed the correct blending... i know that i didnt...

but i would try this instead

(this texture is from farCry)

It has to take the shape of the surface it's projected on like in Half-Life which has texture projection I think.

@Devils. actually i haven't quite optimised the code
i've used 2 textures.. one in white and one in black
i've included them in the Rar file.
if you wish i could send you the original photoshop format?

hm, since i dont know anything about BSP, i cant work on this... but my blending looks weird.


in half-life the flashlight works as follows: a texture UV coordinate in the lightmap image is picked and the lightmap image is getting white at this place. no decal engine, no overlay!

ah i see how that works!
you are not projecting anything on a map-overlay! you just position a "flashlight" sprite in front of the camera... well, thats why it looks like a scope :)

:) and that's why it doesn't take the shape of the surface it's reflected. It may be used as a night vision goggle with goggle sprite shape and greenish color IMO.

as i say, its not a very good copy lol

its designed to give you guys something to work on?

I was reading Devil childs comments about bleending textures. I presume he was talking about subtracting from the shadows in lightmaps with a tourch texture.
I did a lil project about this a while ago (is it the same method?) but it removes shadows from the lightmap using 3 layers of rendering and blending them together to get a single image... not the fastes thing in the world, but it works. (Apparently there are much better ways of doing it... but "hey", i'm simple =P )
here's my post:
http://www.blitzbasic.co.nz/Community/posts.php?topic=67347#751986

no media included... if you are intrested, just Email me, I'll post you a demo with source :)
Hope that helps someone.

I experimented a little with scaling the sprite in order to give a more realistic spot light effect, rather then the "rifle scope" effect, and this is what I came up with:

Before the main loop put:

EntityPickMode world%,2
pivot = CreatePivot()

And during the main loop put:

EntityPick cam, 10000
PositionEntity pivot, PickedX(), PickedY(), PickedZ()
ScaleSprite spot, 0.5 / (EntityDistance(cam,pivot) / 500), 0.5 / (EntityDistance(cam,pivot) / 500)

earok.
are you using the code i supplied?