This sounds like a very good idea... 
then one could use procedural textures for a hf... Very interesting...

//Spider

The Crazy Mule wrote:
> 
> I had this idea, it's not particularly inspired (seemed fairly logical to me),
> and i was just wondering what other ppl thought of it...
> 
> Currently, to create a decently size landscape, even a regular repeating one,
> you have to make a really big heightfield or make copies, translated, of a
> smaller one and bear the glitches running along the edges of each section - And
> even then you have to make heaps of copies.  Anyway, it seems to me that by
> making the bounding volume the intersection of two planes (ie, an infinite
> "slab"), using modulus arithmetic, you could implement infinitely tiling
> heightfields quite simply.
> 
> I shall refer to the bounding volume as the bounding slab, and the single
> repeating heightfield unit as a tile...
> 
> If we say a function RayHits finds out where, if anywhere, the ray hits on a
> single hf tile, then we can use the following recursive wrapper function to
> extend functionality to infinitely tiled:
> 
> Function RayHitsHF(Ray) {
>         Modulus the ray origin or entry point to find where on a single tile it
> enters/starts
>         If (RayHits) then return hitpoint
>         else {
>                 If(Ray Exits Top or bottom) then return no intersection
>                 Else RayHitsHF(ray_exitpoint translated to the opposite edge of the
tile
> bounding box)
>         }
> }
> 
> Some method of preventing endless loops would also probably be needeed
> 
> What do you think?
> --
> Sam Minnee
>     mailto:smi### [at] paradisenetnz
>     http://www.geocities.com/SiliconValley/Horizon/4152/
> 
> Ignorance is bliss - And don't you go telling me otherwise!

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