Not bad!

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Honestly, I preferred the one without the lens flare (?) and the curved path
does not look very realistic, IMHO.

Fernando.

"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:3c4ca002@news.povray.org...
> 2 minutes 28 seconds per frame.
>
> 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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> Honestly, I preferred the one without the lens flare (?) and the curved path
> does not look very realistic, IMHO.
Hmmm, I agree about the lensflare, but I think the curved path, although not
realistic,
makes things a bit more interesting.  And if it's not an asteroid falling down to
earth,
but a spaceship entering our atmosphere (don't forget it's inspired by HE Day's
animation,
where this sort of effect is used for the fighters entering the atmosphere), then the
curved path, imho, looks a lot better than a straight path.

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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"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:3c4cf83e@news.povray.org...
> > Honestly, I preferred the one without the lens flare (?) and the curved path
> > does not look very realistic, IMHO.
> Hmmm, I agree about the lensflare, but I think the curved path, although not
realistic,
> makes things a bit more interesting.  And if it's not an asteroid falling down
to earth,
> but a spaceship entering our atmosphere (don't forget it's inspired by HE
Day's animation,
> where this sort of effect is used for the fighters entering the atmosphere),
then the
> curved path, imho, looks a lot better than a straight path.
>

I think the lens flare is good. When something enters the atmosphere it usually
looks like a star. Maybe its just a bit to big.

--
#local X=20*<-2,2,5>;sphere_sweep{catmull_rom_spline 6<-8,-8>1<-8,-8>1<-8,8>1<
8,-8>1<8,8>1<8,8>1translate 20*z pigment{gradient z scale 3color_map{[0rgb<0,9
,18>][1rgb 0]}}}#local K=2*z*X-X;#local R=seed(clock);blob{#while(K.x>X.x)
#local N=X+<rand(R)rand(R)1>/3;#local X=(vlength(N-K)<vlength(X-K)?N:2*X-N);
sphere{X,1,1rotate z*90}sphere{X,1,1}#end pigment{rgbt 1}interior{media{//Nekar
emission<2,4,5>*5}}hollow scale.05}//   http://nekar_xenos.tripod.com/metanoia/


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> I think the lens flare is good. When something enters the atmosphere it usually
> looks like a star. Maybe its just a bit to big.
I think it's a bit to static.  It should, I don't know, maybe rotate a bit, or flicker
some.
Anyway, no more Great Balls Of Fire.  I think you've had enough of that :)

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

Post a reply to this message

emission<2,4,5>*5}}hollow scale.05}//   http://nekar_xenos.tripod.com/metanoia/
"Zeger Knaepen" <zeg### [at] studentkuleuvenacbe> wrote in message
news:3c4d379e$1@news.povray.org...

> Anyway, no more Great Balls Of Fire.  I think you've had enough of that :)
>

I don't think I've had enough of fireballs yet, as I've yet to see a good one
done completely in Pov-Ray 3.5.

--
#local X=20*<-2,2,5>;sphere_sweep{catmull_rom_spline 6<-8,-8>1<-8,-8>1<-8,8>1<
8,-8>1<8,8>1<8,8>1translate 20*z pigment{gradient z scale 3color_map{[0rgb<0,9
,18>][1rgb 0]}}}#local K=2*z*X-X;#local R=seed(clock);blob{#while(K.x>X.x)
#local N=X+<rand(R)rand(R)1>/3;#local X=(vlength(N-K)<vlength(X-K)?N:2*X-N);
sphere{X,1,1rotate z*90}sphere{X,1,1}#end pigment{rgbt 1}interior{media{//Nekar


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> 2 minutes 28 seconds per frame.

very artistic, and wonderful colours - think the lens flare would be better
if it faded out

also how about a different path, and perhaps some camera motion, try to give
some impression of speed - perhaps whizzing past the camera (which then
judders slightly) etc etc


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Rick

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> very artistic, and wonderful colours - think the lens flare would be better
> if it faded out
tnx.
That might be a good idea, but I'm tired of Great Balls Of Fire, so I'm not gonna try
it.

> also how about a different path, and perhaps some camera motion, try to give
> some impression of speed - perhaps whizzing past the camera (which then
> judders slightly) etc etc
that wouldn't work with the shader.  I tried it, but it didn't look good.
Shaders aren't the perfect way to create smoke, but they are fast compared to media.

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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> > also how about a different path, and perhaps some camera motion, try to
give
> > some impression of speed - perhaps whizzing past the camera (which then
> > judders slightly) etc etc
> that wouldn't work with the shader.  I tried it, but it didn't look good.
> Shaders aren't the perfect way to create smoke, but they are fast compared
to media.

You mean, the camera can't move?  Ooh.... :o(  Anyway you've demonstrated
something that has increased my interest in Povman, and you've done much
better smoke than I've ever seen in Pov.. If you'd explain just the basic
idea, so I can learn how to do it with media eventually ...or would it be
great to use glows? (if Pov3.5 had them...)  Negative glows or glows that
aren't fully transparant..

Hugo

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> You mean, the camera can't move?  Ooh.... :o(  Anyway you've demonstrated
> something that has increased my interest in Povman, and you've done much
> better smoke than I've ever seen in Pov.. If you'd explain just the basic
> idea, so I can learn how to do it with media eventually ...or would it be
> great to use glows? (if Pov3.5 had them...)  Negative glows or glows that
> aren't fully transparant..
Nono, the camera can move, but the method I used to "detect" the edges of the object
isn't
really perfect.  Things wouldn't look good if the fireball was coming towards the
camera,
because too much of the object would be considered as an edge, so it would be almost
completely transparent.
Well, more or less.  It depends on the object you use of course...

I don't think you could learn how to do it with media by knowing how I did this smoke.
Media and shaders are a totally different feature, although very simple media-effects
can
be simulated using shaders.  Using media might be a better idea for smoke, but it's
rather
slow, and shaders are more fun :)

I've been thinking of making smoke with glows, but there is one little problem: glows
are
visible through other objects.  As far as I know, there's no way of letting a glow get
blocked by an object.   So you'd have to check for visibility for each glow.

I'll post the source of the shader and the animation to p.b.s-f, so anyone who wants,
can
play with it :)

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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