Zeger Knaepen wrote:
> 
> > BTW, i wonder how much slower it would be not to store the normals and
> > calculate them from the vertices during trace.  This could save a lot of
> > space when dealing with large heightfields.
> Actually, after a quick look at the code, I had the idea that that's how it's
> done now...
> But it was a *very* quick look! :)
> 

The normals for all vertices are calculated in 'smooth_height_field()' in
hfield.c, the code in 'HField_Normal()' only interpolates these normals.

Christoph

-- 
POV-Ray tutorials, IsoWood include,                 
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Last updated 21 Feb. 2002 _____./\/^>_*_<^\/\.______

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> The normals for all vertices are calculated in 'smooth_height_field()' in
> hfield.c, the code in 'HField_Normal()' only interpolates these normals.
oh, I see :)

cu!
--
camera{location-z*3}#macro G(b,e)b+(e-b)*(C/50)#end#macro L(b,e,k,l)#local C=0
;#while(C<50)sphere{G(b,e),.1pigment{rgb G(k,l)}finish{ambient 1}}#local C=C+1
;#end#end L(y-x,y,x,x+y)L(y,-x-y,x+y,y)L(-x-y,-y,y,y+z)L(-y,y,y+z,x+y)L(0,x+y,
<.5,1,.5>,x)L(0,x-y,<.5,1,.5>,x)               // ZK http://www.povplace.be.tf

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