Whilst the weather over here has been swinging wildly between Winter
and Summer (it's yet to try Spring :-) I've tried my hand at Ridged
Multi-fractals.

It's a work in progress, comments are welcome.

---
Justin Whitton
_/\__/ mail: jus### [at] rayjayclaracouk \__/\_
 \/  \ web: www.rayjay.clara.co.uk             /  \/

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Attachments:
Download 'lstest.jpg' (48 KB)

Preview of image 'lstest.jpg'

So far, so good. :)

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Great thing for some Antarctica scene.  The ridges make for good snow drifts.

Bob

"Justin Whitton" <jus### [at] rayjayclaracouk> wrote in message
news:v8r1fscl83jeqv1009m53u4asac1ka86kt@4ax.com...
| Whilst the weather over here has been swinging wildly between Winter
| and Summer (it's yet to try Spring :-) I've tried my hand at Ridged
| Multi-fractals.

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Justin Whitton wrote:

> Whilst the weather over here has been swinging wildly between Winter
> and Summer (it's yet to try Spring :-) I've tried my hand at Ridged
> Multi-fractals.

What are those/how do you make them?

--
___     _______________________________________________
 | \     |_          <dav### [at] faricynet> <ICQ 55354965>
 |_/avid |ontaine        http://www.faricy.net/~davidf/

"The only difference between me and a madman is that I'm not mad." -Dali

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On Sun, 09 Apr 2000 17:11:21 -0500, David Fontaine <dav### [at] faricynet>
wrote:
>> I've tried my hand at Ridged
>> Multi-fractals.
>
>What are those/how do you make them?

Using MegaPov0.4 they are a function to be used within the IsoSurface
object. To use them, you read the docs, gain as much comprehension as
an ant has of the Empire State building, and then start experimenting
with the parameters :-)

What they give you is the ability to create good terrain without
having to use height fields and their limitations (no height
quantizing, or large file sizes if you want a hugh terrain).

The code for the landscape follows.

#declare _landscape = function { "ridgedmf",<1,2,10,1.1,2> }

#declare landscape = isosurface {
	function {
		_landscape(x,0,z)-y
	}
	eval
	accuracy 0.001
	sign -1
	contained_by { box { <-1000,-3,-1000> <1000,3,1000> } }
	scale <4,1,4>
	scale 1/3
	texture { T_Landscape }
	scale 3
	scale 250
	hollow
}

object { landscape }

The landscape is declared so that I can the use trace() to place
objects (and the camera) on it.

Hope this helps.

---
Justin Whitton
_/\__/ mail: jus### [at] rayjayclaracouk \__/\_
 \/  \ web: www.rayjay.clara.co.uk             /  \/

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Justin Whitton wrote:

> Using MegaPov0.4 they are a function to be used within the IsoSurface
> object. To use them, you read the docs, gain as much comprehension as
> an ant has of the Empire State building, and then start experimenting
> with the parameters :-)

I just read the docs; it helps to have an understanding of Perlin noise
:-)

--
___     _______________________________________________
 | \     |_          <dav### [at] faricynet> <ICQ 55354965>
 |_/avid |ontaine        http://www.faricy.net/~davidf/

"The only difference between me and a madman is that I'm not mad." -Dali

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I like very much :-)

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Justin Whitton wrote:
> 
> Whilst the weather over here has been swinging wildly between Winter
> and Summer (it's yet to try Spring :-) I've tried my hand at Ridged
> Multi-fractals.
> 
> It's a work in progress, comments are welcome.
> 

COOL :-)

Marc

-- 
Marc Schimmler

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Whoa.. that is really good.

Rick

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Ooah-! That's good! I've been playing around with mf-s but never achieved such
realistic results. (Source?)

Are you using a blue ambient value or is it radiosity? IMHO it would be better
with less blue in the shadows.

sig.

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