POV-Ray : Newsgroups : povray.binaries.images : Castle Gard (WIP) : Re: Castle Gard (WIP) Server Time
2 Aug 2024 22:16:52 EDT (-0400)
  Re: Castle Gard (WIP)  
From: Florian Brucker
Date: 18 Feb 2007 06:32:47
Message: <45d8395f@news.povray.org>
Hi RusHHouR!

RusHHouR wrote:
> And the word "macro" scares me.

No need for that! It's really not too hard. Try this:

---%<---

/* We need a random seed if we want to use rand() */
#declare Seed = seed(54890);

#declare Stone = /* Your stone object here */

#macro Rotated_Stone()
	/* Create a vector with random components (within 0 and 1) */
	#local Random_Vector = <rand(Seed),rand(Seed),rand(Seed)>;

	/*
	Until now, the random vector has components from 0..1,
	we need them to go from -1 to 1. We subtract 0.5 (then
	it goes from -0.5 to 0.5 and double it, and multiply it
	by the maximum amount of rotation we want, here 10
	degrees.
	*/
	#local Random_Degrees = (Random_Vector - 0.5)*2*10;

	object {
		Stone
		rotate Random_Degrees
	}
#end

/*
Now everywhere you've used object { Stone } before just use
object { Rotated_Stone() }
*/


--->%---

Should work, although I haven't tested it :)


HTH,
Florian


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