Tutorial request: Guided Missiles (MGS style).

[MDave]

I'm reaching the limits of my quake c abilities so I've decided to ask for help on how to make guided missiles like the ones seen in metal gear solid (the nikita missiles specifically).

Basically, a controllable first person view of a rocket that is constantly moving forwards, slows down to a crawl when turning and slowly speeds up again when not turning the view.

The code I have is a mess/hacky and dosn't work, so I'd rather start off on a good foot

I think it would be a pretty fun weapon

- Thanks for reading.

[Orion]

[url]ftp.gamers.org/pub/idgames2/quakec/weapons/guidemis.zip[/url]

It's a mod from another guy, qc files are included, you can give'em a read!

If you see the files you'll notice that it should do some hacks, I don't understand that changing point of view thing very well... But notice that it copies every player's stats...

[xaGe]

ftp://archives.gamers.org/pub/idgames2/quakec/weapons/guidemis.txt
ftp://archives.gamers.org/pub/idgames2/quakec/weapons/guidemis.zip

[MDave]

Thanks a bunch! I promise I'll show the fruits of my labour after I've finished a demo up

[Wazat]

For those of you who have played Super Smash Bros Brawl, Snake's missile launcher is similar to what he wants (but he wants a first person view). The missile travels rather fast unless it's turning, in which case it travels quite slowly.

MDave: To do the "slowing down during a turn" thing, simply keep track of your last orientation and watch for differences:

*If you track angles, you can do an angle comparison to see if you've turned more than a certain threshold and slow yourself down.

*If you track a direction instead of angles you can do a dot product (which is easier than angle compare imo) by multiplying the current direction and the old direction (make sure both are normalized). The result is a number from -1 to 1, where -1 means they're opposite, 0 means they're perpendicular, and 1 means they're exactly the same. A threshold of 0.95 or so ought to do.

Example:

Code: Select all

// check if I'm turning
dot = self.mangle * self.v_angle;
if(dot < 0.95) // if I've turned too much
{
  // slow me down
}

// track last angle
self.mangle = self.v_angle;


Hope that helps.

[MDave]

Most helpful, thanks Wazat