connectable roads

[uprize]

Hi I am working on an isometric engine which is going to allow the user to create roads during the game.

I have thought about it long and hard and am interested in finding a simple yet effective way of making roads 'connect' when they are placed next to another road tile.
A good example of this is in the game Transport Tycoon.

My active object will contain 14 road pictures (one for each possible connection that can occur), i just need to find a good, simple code that will allow me to detect if the tile has been placed next to an existing road tile.

I should also mention that all data is stored in an array.

Any suggestions? (please do not suggest using sensors to detect objects...)

[wizkidweb]

I recall seeing an example of exactly what you are asking on TDC (www.create-games.com). If I find the link I'll post it.

[uprize]

I already had a look there but if you can find it I would greatly appreciate it!

EDIT: Is this the link?? http://www.create-games.com/article.asp?id=1869
It looks pretty cool i might test it out

[Werbad]

A road piece with 4 edges can have a total of 16 different variations... Or are you excluding some?

[Nick]

"A good example of this is in the game Transport Tycoon."

Well, in transport tycoon you actually have to do in manually :P

But if you want it automatically, when you place a piece of road, scan the 4 tiles at each side of it and change them accordingly!

[Dynasoft]

A better example of automatic connecting of roads is Sim City (all of them).

I also recommend checking out OpenTTD if you're a Transport Tycoon fan.

[SEELE]

I tried to make an example it's harder then i thought, i can't wait to see a working version.

[wizkidweb]

bigredron, that example is exactly the one that I was talking about. Good Luck with your project!

[uprize]

yes i mean 16 peices. I forgot 2 lol

Does anyone have the images that are missing in the TDC link i posted above?? it shows what images should be where, otherwise I have to do some testing to find it out