How big would the bang be from the fueltruck model if it was full? Cause I have an idea for something but I want to know the scale of the destruction. and would I even need ot bother with a destroyed model or would just making a "gib shooter" do?

If it was full, very very very big. I saw a video of this fuel truck in japan that got blown in a city. This flame, I swear on my life, was as big as the gas station and its parking lot(including the little mini-mart), of course it was like 50 ft. up. It was huge. Never will forget that.

So im guessing a big bang.

Yeah, a fuel truck explosion is huge...saw one clip of a tanker semi...it had a radius of at least a city block at it's peak.

So a gib model would do... I think I'll make it as full as I want IE, a big explosion. but a truly full truck would be OTT for the HL engine it seems.

Thing to remember is that the explosion just LOOKS big and powerful. It's really fairly weak (comparaitvely). For example: if you took enough C4 to create an explosion with the same size fireball, you'd have a massive crater in the middle of the ground because it's a better explosive. It burns like ****, though. Wheras gasoline is mostly a combustible (it burns), why the blast seems so big is because the gasoline is being spread throughout the air as the cloud expands, so the fire travels with it. But it's not exploding by that point, it's basically just a big, uncontrolled flame thrower. So you would want a destroyed fuel truck. Just burn the hell out of it, make the tank look like it's been torn open (the upper half should be gone, or at least it should be torn open like a monster escaped) and then make an assload of fire sprites around it with one or two big ones and you'll have a fairly accurate fuel truck explosion. Oh, and lots of smoke, too, if you can afford it. Gas smokes like it ain't no thang, even after the truck is blown and is just sitting there burning.

Originally posted by Cheeto
make an assload of fire sprites around it

*unloads his ass*

TY much better explanation of the explosion cheeto. thats gonna earn u a mention in the readme :P but I'm still gonna use a big shooter and rain down some bits of the tanker nearby. I'm sure it will be classic to see a wheel come bouncing down after a map shake and fireball.

No prob, and it would be cool to see little chunks of debris falling down. You might consider using func_trains and the avelocity settings to make them actually arc up through the air and spin like debris. Though I don't think you'd have a wheel come flying up, you'd vertainly have a fair bit of metal. Pretty much anything that's over the top of, or a part of, the top of the fuel tank would be sent flying. Are you going to destroy the whole truck or leave the charred wreck flaming?

Originally posted by Cheeto
Though I don't think you'd have a wheel come flying up, you'd certainly have a fair bit of metal.

I wouldn't say so much that a whell wouldn't come flying out or off the tanker, werid things happen when things explode, crash etc etc, it is entirely possible that a whole wheel not on fire or anything could come off and roll toward/past you, it would just be one of those werid freaky things that happen in real life sometimes.

well the entrie point of the expolsion is to set a mountain side off. the feultruck is partially in a tunnel so I'm thinking I'll have the chared wreckage surround by some rock deris.

I've been looking at the feultruck model. with the new transparencys we can hsave a few polys off that and spend them in areas the modeller really shouldn't have cut them.

Instead of func_trains and the such just use env_shooters to blow debris about...they are simple, use less entities and at least the model being shot has some physics and interacts with solid brushwork.

Get someone to make you a few small truck part models (like a tire/rim a radiator, exhaust pipe)...and use them in shooters...have the shooters named the same as your explosion sprite and since you're probably going to render in the "blown-up" truck having a few parts blow around isn't a bad idea

Ahhhhh, now the fact that it's in a tunnel changes things. See an explosion's strength is increased more and more by the confining space it's in. Because in an open air setting, there's much more surface area for the concussion, the heat, and the fire to spread out too. The air has all that room to expand and move the hell outta the way. But in a confined setting, such as a room, the sudden increase of energy in a confined space leaves the air nowhere to go. So the pressure builds up faster and faster until the walls breach and move themselves out of the way. Air and walls are the same, just that air has a very low resistance and doesn't harm anything as it's flying by (unless you're way to close to the blast, and then you got bigger things to worry about). A gasoline explosion in a mountain tunnel is still fairly weak combined to an actual explosive (maybe a supply truck carrying ammo would be more appropiate?) because it's still gas and air, so it'd mostly just divert itself out the ends of the tunnel. Though it would increase the strength of the blast a bit. I would suggest something like a supply truck carrying ammo, that WOULD collapse that tunnel really fast. Because ammo is loaded with gunpowder (blackpowder was no longer in use by the 40's, was it?) which, in great quantities, is a better explosive than gas. Plus you've got the actual high explosives contained in grenades, mortars, artillery rounds, tank shells, landmines, bazooka rounds, and infantry placed demolitions. More fun than throwing a molotov into a fireworks stand.

If you skipped cheeto's post, it basically said an exploision is like a fire cracker in your hand, with an open hand, the firecracker burns the palm of your hand, with a closed fist, the firecracker blows up your hand.

My guess is, people dont care if the explosion is 100% realistic. Most people know that, a nuke in a tunnel would blow the mountain, and that a concentrated container of gasoline,(like....a fuel truck!)or a substance like it, would most likely just push out the sides.

And he never said it was a closed off tunnel, obviously 1 side of it is open(the fuel truck side, and assuming your taking gameplay into account and not making the player walk a long ways down the tunnel), so its safe to assume that most of the force would just escape out into the open air.

And about pushing the debre, I'd get a func_push. MIght be hard to get it just right, but i think that'd be cool, a big ass explosion goes off and your pushed back form it.....

one step ahead of you there. yeah i know an ammo truck would be more realistic than a feul truck, but
1- I don't have a decent allied ammo truck model
2- I have a feultruck model, but it needs a bit of work.
3- Would it honestly occour to you to shoot the truck without checking the back or having a truck for the objective pic? a feultruck is sooooo mcuh more obvious to shoot.

I was planning on using gib shooters rather than func_trains and I had planned on the fact the tunnel would confine and foucs the blast a bit better.

You guys (me included) think too much...who cares if the explosion is "focused" or realistic...just use a big-ass scaled up sprite (explosion1.spr) with a couple of shooters...maybe place some wall toggles in position after the explosion like rocks that fell and crushed the truck...make them invisible at start...mebbie place some wall toggles on the top of the rock wall set to be visible at the start then when all is fired they disappear in the explosion sprite and magically appear as the other set of wall toggles comes visible.

Here's a test map i made to show how you can "fire" a 88mm cannon (go in as axis)...but take a look at the guard shack...two wall toggles...a "nice" shack and a "destroyed" shack...you can use the same principle for your fuel truck (Sorry for the shell1 and shell2 models...i don't have the shells built yet so i used some standard DoD models in their place)

http://users.invasionworks.com/~fuzzdad/testshot2.zip

Originally posted by Angry Beaver
one step ahead of you there. yeah i know an ammo truck would be more realistic than a feul truck, but
1- I don't have a decent allied ammo truck model
2- I have a feultruck model, but it needs a bit of work.
3- Would it honestly occour to you to shoot the truck without checking the back or having a truck for the objective pic? a feultruck is sooooo mcuh more obvious to shoot.

I was planning on using gib shooters rather than func_trains and I had planned on the fact the tunnel would confine and foucs the blast a bit better. Well I can make you a model of an Allied Deuce and a half truck (the standard Allied truck) since I plan to anyways, and I can just leave the canvas covering off of it and have a couple of boxes that are labeled 'High Explosive' or some such. Partly because, no I wouldn't think to destroy a fuel truck since it'd be something worth saving (gas, unlike ammo, isn't nation specific, anyone can use it) and because I'd be reading the map briefing my first time or two anyways to see what to do. As for the fun_trains, I suggested those since you can have them arc up into the air, but if you're just doing it in a tunnel, they yeah, gib shooters would be fine. Though depending on the layout of the tunnel and mountain side, having func_trains as the rocks might not be a bad idea, since then you can have big ass boulders come rolling down the side and crush stuff.

And FD, I'm serious about it cos it's fun to talk about things that go 'boom'. :p

I know exactly how to everytihng involved and will decide for sure by trial and error. the main point of this post was to try get some feedback. cheeto I'd love that model, it would prly be better. heck I can even help you with it.

Help me find good pics of a Deuce and a half and it'll make my job easier.

Hope this is enough
http://www.legeros.com/toys/gallery/mb-deuce.jpg
http://www.usarc.army.mil/88thRSC/other_units/history_museum/collection_images/Deuce%20Auger%20Truck.jpg
http://www.militaryconvoy.com/deuce.jpg
http://www.1starmy.com/Prod_images/1616459001%5B2%5D.jpg
http://www.greensix.simonides.org/owners/mike-colerick/deuce1a.jpg
http://www.geocities.com/MotorCity/Highway/3969/Deuceforsale.html
http://www.easternsurplus.net/
http://www.allroutes.to/sth/2000/200008061519to1630/images/MVC-026S.JPG
http://www.jotus.com/us50204-fa.jpg