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DarkBASIC Professional Discussion / Ideas about F-Zero style track collision

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David T
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Posted: 13th Aug 2003 21:04 Edited at: 14th Aug 2003 15:55
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Okay, do any one of have any ideas about to contruct some sort of workable track collision system (like f-zero / extreme g 3)?

My problem is getting the smooth bends to work correctly, expecially if they are banked. I could try and convert a CShop 3 .x to a bsp and use that sliding collision? [CS3 has the arch prefab]

But then the whole level would have to be boxed in, which is something I do NOT want!

At the moment my track is very long and very straight. Any ideas?

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Megaman Zero
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Posted: 13th Aug 2003 21:12
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You know, I encountered this, a .x model is about the only way to go at this time, unless you want to try & make a loop or a corkscrew in CShop 3.

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Toothpick
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Posted: 14th Aug 2003 01:17
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You could use the intersect object() command.
You use it to get the height of the x model track surface.
works just like the get ground height command for a matrix.

any help to ya?

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David T
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Posted: 14th Aug 2003 15:52
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Thanks, I'll try.

I've also had another idea how to make the car stay on the track when it banks / loops - by finding the angle the track is at (like rotating a car to fit on a matrix) I can then apply gravity in that direction, so if you were upside down then the gravity would actually be going up, so you would stick to the track.

Obviously, when you are going slow it will revert to good old downward gravity maing you can't crawl along at 20mph.

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Hamish McHaggis
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Posted: 14th Aug 2003 16:14
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To smooth the rotation out you could take many points of the track beneath you and make an average of them, rather than just taking 2. I have been trying to work out how to make a game like this for ages with DBC but the collision is just too slow, tis intersect object command sounds like the key. I'm thinking of getting DBPro soon.

Brains are for idiots.

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David T
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Posted: 14th Aug 2003 16:16
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Actualy, I'm just working out how to do the rotation now - I know my trigonometry and I'm sure that has something to do with it - I'll get the trusty Tank demo(tm) source code out and have a look.

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Hamish McHaggis
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Posted: 14th Aug 2003 21:25
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Yeah, just take the distance from each side of the car, to the track, and work out how far you need to rotate the car in order to make the distance equal on both sides.

Brains are for idiots.

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David T
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Posted: 14th Aug 2003 22:03
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I've decided that what I need is that collision DLL (can't remember name). My only problems are:

a) I can't model a decent track
b) Of only someone can port it over to DBPro? Drake did but his code didn't work for me.

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MrTAToad
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Posted: 15th Aug 2003 00:50
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Quote: "a) I can't model a decent track"

Thats the trouble I had, unfortunately...

Cant remember the collision DLL at the moment, either...


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Terabyte
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Posted: 15th Aug 2003 01:33 Edited at: 15th Aug 2003 01:41
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can you export .x files in c shop
sombody showed me recently how to get decent .x polygon collision. and .x files dont have to be enclosed


EDIT: ok soz i missed a post

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MrTAToad
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Posted: 15th Aug 2003 11:24
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Yes, you need the .X plug-in for CShop if I remember correctly (probably from the authors web site).


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Kensupen
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Posted: 15th Aug 2003 13:08
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I started working on this using intersect object, but gave up for now due to programming for my Pocket PC. Once I get bored with that, I'll get it working and release the snippet.

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David T
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Posted: 15th Aug 2003 14:46
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I'm using CShop 3, which has .x export adn many fancy prefabs incluyding a curved arch which could be used for a bendy track.

I also have Truespace 3.1 and if I can model some sort of bendy pipe in that then hollow it some how that could become my track?

I tired to get that collision DLL to work in DBPro but I had no luck (even with the DBP code). Well, I'll have to cope with straight track for now

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DMXtra
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Posted: 16th Aug 2003 02:12
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You should be able to do this a lot easier in Upgrade 6 as it provides octree support with new collision support from Mike.

The new nodetree(octree) feature is pretty cool, can use no portals at all for like terrain or use a smart portal system where you can even have multi-tier levels with portal support and increase your framerate. Also full shader effects can be used on the levels as well as a new collision system that has been designed for the nodetree in mind.

Its an alternative to just using BSP's.

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