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Johannes Hubert schrieb in Nachricht <36af188d.0@news.povray.org>...
>Maybe it is a distortion rue to a wide camera angle?
>
>Johannes.
Something like it, yes, I think so too.
--
Rudy
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Mike wrote:
> Mikey likes it too, and he hates everything.
>
> Ken wrote:
>
> > Ken likes it.
Bob likes it too, but thinks the beam is just a teensy bit too
solid.
--
Bob & Kelly Crispen
cri### [at] hiwaay net
A polar bear is just a rectangular bear in a different coordinate system.
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<HTML>
I was inspired by your post to start playing with media, I came up with
the following scene (very sparce) with what I think the beam should look
like.
<P>Would anyone like to comment on the beam effect? any ideas are
welcome.
<P><IMG SRC="cid:par### [at] earthlinknet" HEIGHT=480 WIDTH=640>
<P>the source:
<P>//begin*******************************
<P>// Persistence of Vision Ray Tracer Scene Description File
<BR>// File: lighthouse.pov
<BR>// Vers: 3.1
<BR>// Desc: spotlight/media interaction test
<BR>// Date: 02/07/99
<BR>// Auth: Mark Palmquist
<BR>// uses bricks.inc by Jeff Lee
<BR>//
<BR>#include "colors.inc"
<BR>#include "metals.inc"
<BR>#include "glass.inc"
<BR>
<P>camera {location < 0, 16, -600>
<BR> right 4/3*x
<BR> up y
<BR> direction z
<BR> angle 65
<BR> look_at <0, 105, 0>
<BR>}
<P>light_source { <150, 500, 500>
<BR> color rgb 2
<BR> media_interaction off
<BR> //shadowless
<BR>}
<P>#declare Lightbulb = union {
<BR> merge {
<BR> sphere { <0,0,0>,1 }
<BR> cylinder { <0,0,1>, <0,0,0>, 1
<BR> scale <0.35, 0.35, 1.0>
<BR> translate 0.5*z
<BR> }
<BR> texture {
<BR> pigment {color rgb <1,
1, 1>}
<BR> finish {ambient .8 diffuse
.6}
<BR> }
<BR> }
<BR> cylinder { <0,0,1>, <0,0,0>, 1
<BR> scale <0.4, 0.4, 0.5>
<BR> texture { T_Brass_1A }
<BR> translate 1.5*z
<BR> }
<BR> //rotate -90*x
<BR> scale 2
<BR>}
<BR>#declare beam=
<BR>union{
<BR> light_source { <0, .1, 0> color rgb<1, 1, 1>*4
<BR> spotlight
<BR> point_at <0, 10, 0>
<BR> radius 1
<BR> falloff 8
<BR> media_attenuation on
<BR> looks_like {Lightbulb}
<BR> }
<BR> cone {<0,0,0>, 0, <0,1000,0>, 360 open hollow interior
{media
<BR> {
<BR> intervals 43
<BR> absorption .01
<BR> scattering {1, rgb 0.02}
<BR> samples 1, 10
<BR> confidence 0.9999
<BR> variance 1/1000
<BR> ratio 0.9
<BR> }
<BR> }
<BR> pigment{Clear}
<BR> }
<BR> rotate <0,0,-93>
<BR>}
<P>#declare newBrickMidtone=colour rgb <0.60,0.60,0.60>
<BR>#declare newBrickHighlight=colour rgb <0.75,0.70,0.70>
<BR>#declare newBrickLowlight=colour rgb <0.35,0.35,0.35>
<BR>#include "bricks.inc" //Author: Jeff Lee
<BR>
<BR>#declare lighthouse=
<BR>union{
<BR> object { beam translate <12.1,110,0>}
<BR> cone {<0,0,0>, 20, <0,100,0>, 15 texture { T_newBrick
scale <1,2,18>}}
<BR> merge{
<BR> cylinder{ 100*y, 120*y, 12 texture
{T_Glass3}}
<BR> difference {
<BR> sphere { 120*y, 12}
<BR> box { <-15,100,-15> <-15,120,-15>}
<BR> texture {T_Brass_3C}
<BR> }
<BR> }
<BR>}
<P>object {lighthouse translate <-200,0,0>}
<P>//end*******************************
<P>Darcy Johnston wrote:
<BLOCKQUOTE TYPE=CITE>Well, some time ago, I posted an image depicting
my model of the Hatteras
<BR>lighthouse. Here it is again in a scene.
<P>Please let me know what you think of it.
<BR>Thanks,
<BR>Darcy
<BR>djo### [at] inamecomNOSPAM
<BR><A
HREF="http://www.geocities.com/SiliconValley/Sector/4317">http://www.geocities.com/SiliconValley/Sector/4317</A></BLOCKQUOTE>
</HTML>
Post a reply to this message
Attachments:
Download 'c:\windows\temp\nsmailar.jpeg.jpg' (8 KB)
Preview of image 'c:\windows\temp\nsmailar.jpeg.jpg'
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Very nice image, and I agree with you on the light, but I'd make it go
even further out, since it is not a very good comparison wiht the
lighthouse and the length of the beam..
Can you please post with all images as attachments, and with only plain
text when you send ?
There has been much argumants about this erlier, and several of the
people on the newsgroup has readers that don't support html, or pay by
the minute, and therefore is put at an disadvangtage when you post like
this..
//Spider
Mark Palmquist wrote:
>
> I was inspired by your post to start playing with media, I came up
> with the following scene (very sparce) with what I think the beam
> should look like.
>
> Would anyone like to comment on the beam effect? any ideas are
> welcome.
>
> [Image]
>
> the source:
>
> //begin*******************************
>
> // Persistence of Vision Ray Tracer Scene Description File
> // File: lighthouse.pov
> // Vers: 3.1
> // Desc: spotlight/media interaction test
> // Date: 02/07/99
> // Auth: Mark Palmquist
> // uses bricks.inc by Jeff Lee
> //
> #include "colors.inc"
> #include "metals.inc"
> #include "glass.inc"
>
>
> camera {location < 0, 16, -600>
> right 4/3*x
> up y
> direction z
> angle 65
> look_at <0, 105, 0>
> }
>
> light_source { <150, 500, 500>
> color rgb 2
> media_interaction off
> //shadowless
> }
>
> #declare Lightbulb = union {
> merge {
> sphere { <0,0,0>,1 }
> cylinder { <0,0,1>, <0,0,0>, 1
> scale <0.35, 0.35, 1.0>
> translate 0.5*z
> }
> texture {
> pigment {color rgb <1, 1, 1>}
> finish {ambient .8 diffuse .6}
> }
> }
> cylinder { <0,0,1>, <0,0,0>, 1
> scale <0.4, 0.4, 0.5>
> texture { T_Brass_1A }
> translate 1.5*z
> }
> //rotate -90*x
> scale 2
> }
> #declare beam=
> union{
> light_source { <0, .1, 0> color rgb<1, 1, 1>*4
> spotlight
> point_at <0, 10, 0>
> radius 1
> falloff 8
> media_attenuation on
> looks_like {Lightbulb}
> }
> cone {<0,0,0>, 0, <0,1000,0>, 360 open hollow interior {media
> {
> intervals 43
> absorption .01
> scattering {1, rgb 0.02}
> samples 1, 10
> confidence 0.9999
> variance 1/1000
> ratio 0.9
> }
> }
> pigment{Clear}
> }
> rotate <0,0,-93>
> }
>
> #declare newBrickMidtone=colour rgb <0.60,0.60,0.60>
> #declare newBrickHighlight=colour rgb <0.75,0.70,0.70>
> #declare newBrickLowlight=colour rgb <0.35,0.35,0.35>
> #include "bricks.inc" //Author: Jeff Lee
>
> #declare lighthouse=
> union{
> object { beam translate <12.1,110,0>}
> cone {<0,0,0>, 20, <0,100,0>, 15 texture { T_newBrick scale
> <1,2,18>}}
> merge{
> cylinder{ 100*y, 120*y, 12 texture {T_Glass3}}
> difference {
> sphere { 120*y, 12}
> box { <-15,100,-15> <-15,120,-15>}
> texture {T_Brass_3C}
> }
> }
> }
>
> object {lighthouse translate <-200,0,0>}
>
> //end*******************************
>
> Darcy Johnston wrote:
>
> > Well, some time ago, I posted an image depicting my model of the
> > Hatteras
> > lighthouse. Here it is again in a scene.
> >
> > Please let me know what you think of it.
> > Thanks,
> > Darcy
> > djo### [at] inamecomNOSPAM
> > http://www.geocities.com/SiliconValley/Sector/4317
>
>
Post a reply to this message
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I see you're keeping the tilted lighthouse though ;)
Spiders may be right, and maybe not. The beam crosses nearly
perpendicular, I would suppose, to the observer due to the perspective
camera angle. This would be seen as a much diminished beam at such a
point. Are you using 'scattering' type 5? If not, you might want to try
it out, and set 'eccentricity' to greater than 0.
Mark Palmquist wrote:
>
> I was inspired by your post to start playing with media, I came up
> with the following scene (very sparce) with what I think the beam
> should look like.
>
> Would anyone like to comment on the beam effect? any ideas are
> welcome.
>
> [Image]
>
> the source:
>
> //begin*******************************
>
> // Persistence of Vision Ray Tracer Scene Description File
> // File: lighthouse.pov
> // Vers: 3.1
> // Desc: spotlight/media interaction test
> // Date: 02/07/99
> // Auth: Mark Palmquist
> // uses bricks.inc by Jeff Lee
> //
> #include "colors.inc"
> #include "metals.inc"
> #include "glass.inc"
>
>
> camera {location < 0, 16, -600>
> right 4/3*x
> up y
> direction z
> angle 65
> look_at <0, 105, 0>
> }
>
> light_source { <150, 500, 500>
> color rgb 2
> media_interaction off
> //shadowless
> }
>
> #declare Lightbulb = union {
> merge {
> sphere { <0,0,0>,1 }
> cylinder { <0,0,1>, <0,0,0>, 1
> scale <0.35, 0.35, 1.0>
> translate 0.5*z
> }
> texture {
> pigment {color rgb <1, 1, 1>}
> finish {ambient .8 diffuse .6}
> }
> }
> cylinder { <0,0,1>, <0,0,0>, 1
> scale <0.4, 0.4, 0.5>
> texture { T_Brass_1A }
> translate 1.5*z
> }
> //rotate -90*x
> scale 2
> }
> #declare beam=
> union{
> light_source { <0, .1, 0> color rgb<1, 1, 1>*4
> spotlight
> point_at <0, 10, 0>
> radius 1
> falloff 8
> media_attenuation on
> looks_like {Lightbulb}
> }
> cone {<0,0,0>, 0, <0,1000,0>, 360 open hollow interior {media
> {
> intervals 43
> absorption .01
> scattering {1, rgb 0.02}
> samples 1, 10
> confidence 0.9999
> variance 1/1000
> ratio 0.9
> }
> }
> pigment{Clear}
> }
> rotate <0,0,-93>
> }
>
> #declare newBrickMidtone=colour rgb <0.60,0.60,0.60>
> #declare newBrickHighlight=colour rgb <0.75,0.70,0.70>
> #declare newBrickLowlight=colour rgb <0.35,0.35,0.35>
> #include "bricks.inc" //Author: Jeff Lee
>
> #declare lighthouse=
> union{
> object { beam translate <12.1,110,0>}
> cone {<0,0,0>, 20, <0,100,0>, 15 texture { T_newBrick scale
> <1,2,18>}}
> merge{
> cylinder{ 100*y, 120*y, 12 texture {T_Glass3}}
> difference {
> sphere { 120*y, 12}
> box { <-15,100,-15> <-15,120,-15>}
> texture {T_Brass_3C}
> }
> }
> }
>
> object {lighthouse translate <-200,0,0>}
>
> //end*******************************
>
> Darcy Johnston wrote:
>
> > Well, some time ago, I posted an image depicting my model of the
> > Hatteras
> > lighthouse. Here it is again in a scene.
> >
> > Please let me know what you think of it.
> > Thanks,
> > Darcy
> > djo### [at] inamecomNOSPAM
> > http://www.geocities.com/SiliconValley/Sector/4317
>
>
--
omniVERSE: beyond the universe
http://members.aol.com/inversez/POVring.htm
=Bob
Post a reply to this message
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Bob Hughes wrote:
>
> I see you're keeping the tilted lighthouse though ;)
> Spiders may be right, and maybe not. The beam crosses nearly
> perpendicular, I would suppose, to the observer due to the perspective
> camera angle. This would be seen as a much diminished beam at such a
> point. Are you using 'scattering' type 5? If not, you might want to try
> it out, and set 'eccentricity' to greater than 0.
The original lighthouse was posted by Darcy Johnston...
The tilting you see is only an illusion created by it's proximity to
the left side of the image demarcation line. The lighthouse wall has
a tapered edge. The image edge is straight. If you concentrate your
focus on the center of the screen instead of the lighthouse object you
will percieve it as verticaly straight. If you concentrate your focus
on the lighthouse object your eyes evaluate the angle of the lighthouse
in relation to the image edge and you are tricked into thinking the
lighthouse is tilted. Change your thinking, not the object, and you
will find there is nothing wrong with it's orientation.
Ken Tyler over and out.
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Sorry about posting the image in the post, in netscape how to attach
pictures?, not in the menus that I could find.
I agree, this was mostly an image for the 'beam' the lighthouse was for
reference only.
Spider wrote:
> Very nice image, and I agree with you on the light, but I'd make it go
> even further out, since it is not a very good comparison wiht the
> lighthouse and the length of the beam..
>
> Can you please post with all images as attachments, and with only plain
> text when you send ?
> There has been much argumants about this erlier, and several of the
> people on the newsgroup has readers that don't support html, or pay by
> the minute, and therefore is put at an disadvangtage when you post like
> this..
>
> //Spider
>
> Mark Palmquist wrote:
> >
> > I was inspired by your post to start playing with media, I came up
> > with the following scene (very sparce) with what I think the beam
> > should look like.
> >
> > Would anyone like to comment on the beam effect? any ideas are
> > welcome.
> >
> > [Image]
> >
> > the source:
> >
> > //begin*******************************
> >
> > // Persistence of Vision Ray Tracer Scene Description File
> > // File: lighthouse.pov
> > // Vers: 3.1
> > // Desc: spotlight/media interaction test
> > // Date: 02/07/99
> > // Auth: Mark Palmquist
> > // uses bricks.inc by Jeff Lee
> > //
> > #include "colors.inc"
> > #include "metals.inc"
> > #include "glass.inc"
> >
> >
> > camera {location < 0, 16, -600>
> > right 4/3*x
> > up y
> > direction z
> > angle 65
> > look_at <0, 105, 0>
> > }
> >
> > light_source { <150, 500, 500>
> > color rgb 2
> > media_interaction off
> > //shadowless
> > }
> >
> > #declare Lightbulb = union {
> > merge {
> > sphere { <0,0,0>,1 }
> > cylinder { <0,0,1>, <0,0,0>, 1
> > scale <0.35, 0.35, 1.0>
> > translate 0.5*z
> > }
> > texture {
> > pigment {color rgb <1, 1, 1>}
> > finish {ambient .8 diffuse .6}
> > }
> > }
> > cylinder { <0,0,1>, <0,0,0>, 1
> > scale <0.4, 0.4, 0.5>
> > texture { T_Brass_1A }
> > translate 1.5*z
> > }
> > //rotate -90*x
> > scale 2
> > }
> > #declare beam=
> > union{
> > light_source { <0, .1, 0> color rgb<1, 1, 1>*4
> > spotlight
> > point_at <0, 10, 0>
> > radius 1
> > falloff 8
> > media_attenuation on
> > looks_like {Lightbulb}
> > }
> > cone {<0,0,0>, 0, <0,1000,0>, 360 open hollow interior {media
> > {
> > intervals 43
> > absorption .01
> > scattering {1, rgb 0.02}
> > samples 1, 10
> > confidence 0.9999
> > variance 1/1000
> > ratio 0.9
> > }
> > }
> > pigment{Clear}
> > }
> > rotate <0,0,-93>
> > }
> >
> > #declare newBrickMidtone=colour rgb <0.60,0.60,0.60>
> > #declare newBrickHighlight=colour rgb <0.75,0.70,0.70>
> > #declare newBrickLowlight=colour rgb <0.35,0.35,0.35>
> > #include "bricks.inc" //Author: Jeff Lee
> >
> > #declare lighthouse=
> > union{
> > object { beam translate <12.1,110,0>}
> > cone {<0,0,0>, 20, <0,100,0>, 15 texture { T_newBrick scale
> > <1,2,18>}}
> > merge{
> > cylinder{ 100*y, 120*y, 12 texture {T_Glass3}}
> > difference {
> > sphere { 120*y, 12}
> > box { <-15,100,-15> <-15,120,-15>}
> > texture {T_Brass_3C}
> > }
> > }
> > }
> >
> > object {lighthouse translate <-200,0,0>}
> >
> > //end*******************************
> >
> > Darcy Johnston wrote:
> >
> > > Well, some time ago, I posted an image depicting my model of the
> > > Hatteras
> > > lighthouse. Here it is again in a scene.
> > >
> > > Please let me know what you think of it.
> > > Thanks,
> > > Darcy
> > > djo### [at] inamecomNOSPAM
> > > http://www.geocities.com/SiliconValley/Sector/4317
> >
> >
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nope, just default type 1. I will experiment more with scattering types
and see what develops. Thanks for the insight, and about the tilt, it's an
illusion as can be seen from the source :), does look like leaning tower of
pizza though !:)!
Bob Hughes wrote:
> I see you're keeping the tilted lighthouse though ;)
> Spiders may be right, and maybe not. The beam crosses nearly
> perpendicular, I would suppose, to the observer due to the perspective
> camera angle. This would be seen as a much diminished beam at such a
> point. Are you using 'scattering' type 5? If not, you might want to try
> it out, and set 'eccentricity' to greater than 0.
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Yes, Darcy did create the original image, I hope this will clear that up.
Sorry Darcy if they thought it was my scene originally.
Ken wrote:
> Bob Hughes wrote:
> >
> > I see you're keeping the tilted lighthouse though ;)
> > Spiders may be right, and maybe not. The beam crosses nearly
> > perpendicular, I would suppose, to the observer due to the perspective
> > camera angle. This would be seen as a much diminished beam at such a
> > point. Are you using 'scattering' type 5? If not, you might want to try
> > it out, and set 'eccentricity' to greater than 0.
>
> The original lighthouse was posted by Darcy Johnston...
>
> The tilting you see is only an illusion created by it's proximity to
> the left side of the image demarcation line. The lighthouse wall has
> a tapered edge. The image edge is straight. If you concentrate your
> focus on the center of the screen instead of the lighthouse object you
> will percieve it as verticaly straight. If you concentrate your focus
> on the lighthouse object your eyes evaluate the angle of the lighthouse
> in relation to the image edge and you are tricked into thinking the
> lighthouse is tilted. Change your thinking, not the object, and you
> will find there is nothing wrong with it's orientation.
>
> Ken Tyler over and out.
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Yes, yes, I know it was originally Darcy who posted a lighthouse that
"appeared" tilted. Better keep those analytical mind gears greased or
there might be a grinding halt later. j/k
Ken, you sure seem to have something there about looking at the center
of the picture to make the lighthouse seem correct. In fact if I look
all the way from left to the right it changes the lean dramatically. Or
is that an illusion too? Oh yeah, of course, definition of illusion is
to appear differently than actually is.
Mark, about Netscape (using Communicator 4.5 here) and turning off html
posting, think you just go to Edit/Preferences then
Mail&Newsgroups/Formatting and click the radio button next to "Use the
plain text editor to compose messages" under the Message Formatting. May
be similar if other version too.
And adding an image to a posting is done with File/Attach/File... in the
menu or Attach button on toolbar of , once again, Communicator. Don't
suppose you are actually reading and posting directly from Netscape
alone anyway, or are you?
But then, if I get here through the news://news.povray.org/ url and try
to post a message I get Communicator again here, which then uses the
same procedure I just described above.
Mark Palmquist wrote:
>
> nope, just default type 1. I will experiment more with scattering types
> and see what develops. Thanks for the insight, and about the tilt, it's an
> illusion as can be seen from the source :), does look like leaning tower of
> pizza though !:)!
>
> Bob Hughes wrote:
>
> > I see you're keeping the tilted lighthouse though ;)
> > Spiders may be right, and maybe not. The beam crosses nearly
> > perpendicular, I would suppose, to the observer due to the perspective
> > camera angle. This would be seen as a much diminished beam at such a
> > point. Are you using 'scattering' type 5? If not, you might want to try
> > it out, and set 'eccentricity' to greater than 0.
--
omniVERSE: beyond the universe
http://members.aol.com/inversez/POVring.htm
=Bob
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