High resolution heightmaps?

[asia]

Is it possible to have an heightmap with more than 256 levels? If yes how?
I did try with red, green, blue but with no success. Any idea?
Fabio

[Lenn]

You can use an array of floating point values as your image, and set it to the landscape using TVLandscape.SetHeightArray.

[asia]

Thanks Lenn, You are always very collaborative!
Fabio

[Lenn]

No problem

(unless ... you were being sarcastic and expected me to give you a code example )

[asia]

Dear people,
after a bit of struggling I discovered that landscape precision can be set via the following method:

Code:

Land.SetHeightmapMode TV_HEIGHTMAP_ALLBGR

(to be called before the GenerateTerrain method)
This method allows height H at a given position (pixel) coded by the following:

Code:

green = Int(H / 256)
blue = H - green * 256
color = RGB(0, green, blue) ‘ VB6 syntax

Hope this can be useful to some one in the future…
Ciao
Fabio

[Lenn]

Of course, didn't you see that before?
But height array is still more precise.
Or at least simpler for me anyway.

btw, why aren't you using the red channel? Maybe a small mistake there?

[asia]

didn't you see that before?

yes! I forgot!
I have only the highest montain at 2300 m and I keep 1 meter precision. With such a precision I do not need the red channal. Mont Everest is 8850 m. (less the 65536) so many of us wont need the red channel .

[Lenn]

only 1m  precision?  oh... well okay then. you're good to go

[TecnoBacon]

One trick I use for less than 1 m  is to set it to an expanded terrain then rescale it by a fraction such as .5 for half meter resolution then save it as a height array.