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Charles Krause wrote:
> >
> >Would it be possible to layer or map the wood and lead textures, then apply
> it
> >as a _planar_ with some turbulence?
> >really quick example:
> > texture {
> > planar
> > turbulence 0.099
> > texture_map {
> > [0.6 Wood_texture ]
> > [1.0 Lead_texture ]
> > }
> >}
>
> Hmmm - you mean something like a gradient map?
> Above a certain level it's paint, below a certain level it's wood, and then
> put a bit of
> turbulence in it, so there is a little paint in the wood area, and a little
> wood in the paint area?
No, not a gradient but planar, and not for the paint, just for the tip. The same
method you are using to define the graphite of the pencil (it's lead) remains
the same only you are including two textures stacked on top of eachother and
with some turbulence which cause the two to interact with eachother.
>
>
> This would work for ROUND pencils, where the dividing line is a circle
> contained in a plane, but what about the hex pencils? the dividing line is a
> complex shape.
The above could work for any shape because you are only adjusting the texturing
for the tip which is round ( or conical ) for all pencils.
> It also occurred to me that for the most part, your camera is not going to
> be doing a zoom in on the sharpened point :) If it's a desk scene, pencils
> might just be decor. Maybe it's more trouble than it's worth to fix this? I
> don't know.
(*hee hee*) You're right ;-] -- sometimes though it's the small details that
can lead to much larger solutions. This apple I'm working on; Apples are red or
green - we all know that and that is fine - until you try to render one. It
doesn't look right and you wonder why -- apples are red, my apple is red - yet
it looks nothing like an apple. An apple, in fact, is red and/or green and is
the result of several layers of hundreds of shades <rgb&f&t madness - I tell
you>. Realizing this I've struggled to emmulate as well as possible the mapping
and layering of these shades. Am I being completely anal about this pursuit?
Yes, very much so - but also, my scenes have improved off the scale as a result
of a knew, improved and far more impressive understanding of texture, pigments,
normals and interactions. Will I ever finish the apple? I doubt it, it is for me
my Moby Dick - but thanks to it I am a better captain.
>
>
> A CSG solution that I might tinker with, is subtracting a number of small
> diameter, short cylinders, whose long axis is aligned with the side of the
> shear_cone and randomly distributed around the perimeter of the pencil.
> Alternatively, small, unevenly scaled spheres might work better. This would
> approximate 'dings and dent' along that border. Again - the hex pencil is a
> much tougher problem.
that is a very good idea for a solution and holds potential for future affects.
KB-
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>
>No, not a gradient but planar, and not for the paint, just for the tip. The
same
>method you are using to define the graphite of the pencil (it's lead)
remains
>the same only you are including two textures stacked on top of eachother
and
>with some turbulence which cause the two to interact with eachother.
>
Oh - you seem to think the lead is a textural device - while I never thought
of that - although NOW it seems obvious. The lead is another cylinder
entirely.
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This looks really nice, and will probably brighten(dullify?) many desk scenes.
No, I won't make one(i can't get the papers correct at all)
*smile*
well, good work and good luck.
hm.. the text.. a text object translated and scaled rirght, and then with a
"golden" colour, and then difference it? I think that's how they look on my
pencils...
Charles Krause wrote:
>
> Ok - there are a number of pencil models available - but none that did JUST
> what I wanted. So I whomped up this one.
>
> _everything_ is controlled by a parameter, and the size is strictly
> controllable, known, and it even gives you the bounding cylinder for the
> pencil. You should be able to place the models this macro creates precisely
> in a scene.
>
> Attached are a few examples, all pencils are created by the same macro,
> just with different parameters.
>
> Any suggestions at how to improve these models is much appreciated.
>
> NOTE : this combines the ideas of several models as well as a few original
> ideas, and some staring are real pencils. I could not have done this, had
> other people not written, and published their models. Thank you.
>
> Parameters to date
> ------------------------
>
> The pencil has it's sharpened point at <0,0,0>, extends in the +y direction,
> and is completely bound by cylinder
> <0,0,0>,<0,pencil_length,0>,pencil_radius }
>
> FLAGS
>
> Round : If yes, make the pencil round, else, make a hexagonal body.
>
> Sharpened : If yes, trim the pencil body and lead with the shear_cone to
> make a pointed pencil. Otherwise, the pencil will be 'brand-new'
>
> Eraser : If yes, shorten the pencil body, add an eraser, and add an eraser
> sleeve. The total length of the pencil still equals pencil_length.
>
> Painted : If yes, slap a coat of paint on the pencil (see Matched flag), if
> not, leave it bare wood_texture.
>
> Matched : If yes, make the pencil's paint the same color as it's lead. If
> not, make the paint paint_texture.
>
> VARIABLES
>
> pencil_radius : The outside radius of the pencil. if the round flag is set,
> this will be the radius of the cylinder, if not, the hexagonal prism that
> makes up the body of the pencil will be inside this cylinder, making the
> midpoints of the sides _less_ distant from the center.
>
> pencil_length : this is the total length of the pencil, including eraser, if
> included.
>
> lead_radius : the radius of the cylindrical lead inside the pencil body.
>
> cone_taper : this is the measure of the angle (in radians) of the 'sharp
> point' of the pencil. Lower values will make the cone narrower, and make the
> sharpened part longer.
>
> Eraser_length : The length of the rubber eraser on the end of the pencil.
> Partially hidden by the metal sleeve.
>
> wood_overlap : the amount the metal sleeve fits over the wooden shaft of the
> pencil
>
> eraser_overlap : the amount the metal sleeve fits over the eraser.
>
> spacing : the gap between the ends of the eraser sleeve, and the beginning
> of the ridged sections. Note : the way that the ridges are constructed
> sometimes means the gap on the eraser side is less. This only occurs if the
> ridged region is not of a length that is a multiple of 2*ridge_radius.
>
> ridge_radius : the radius of the individual torus ridges on the metal eraser
> sleeve.
>
> band_width : the width of the painted band in the middle of the eraser
> sleeve. Can be set to zero if no such band is desired.
>
> metal_thickness : the thickness of the eraser sleeve.
>
> Textures
>
> paint_texture : the texture used for the coat of paint, if the pencil is
> painted, and if the matched flag is not set.
>
> lead_texture : the texture used for the pencil lead, and the paint_texture
> IF the matched flag is set.
>
> Wood_texture : the texture of the wood body of the pencil. NOTE : this is
> the texture of the sharpened surfaces, and the trimmed ends only. If the
> pencil is trimmed by CSG, the body of the pencil will show the
> paint_texture.
>
> eraser_texture : the texture of the eraser, if present.
>
> holder_texture : the texture of the eraser_sleeve, if present
>
> band_texture : the texture of the painted band on the eraser sleeve, if
> present.
>
> ---------------------------------
>
> I would like to add the ability to put writing on the side of the pencils
> before I post the actual macro, provided there is interest.
>
> Suggestions anyone?
>
> [Image]
--
//Spider
[ spi### [at] bahnhof se ]-[ http://www.bahnhof.se/~spider/ ]
What I can do and what I could do, I just don't know anymore
"Marian"
By: "Sisters Of Mercy"
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>
> Oh - you seem to think the lead is a textural device - while I never thought
> of that - although NOW it seems obvious. The lead is another cylinder
> entirely.
I thought that it was. What I was thinking was that instead of using just the
graphite pigment for the lead that you combine it with whatever wood texture
(and parameters ) that was used for the pencil in the texture for the cylinder.
I slapped together a real basic image, hope you don't mind. ;-]
KB-
cone { <-1, 0.001, -1>, 0.001, <2, 4, 2>, 1.2
texture {
planar
turbulence 0.4
texture_map {
[0.01 T_Wood23 finish { ambient 0.3 } scale 4 rotate z*-40 ]//whatever Wood
texture you choose
[0.2 pigment { rgb 0.65 } finish {specular 0.5 roughness 0.15 }]
}
translate y*0.6
}
}
Post a reply to this message
Attachments:
Download 'lead.jpg' (20 KB)
Preview of image 'lead.jpg'
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In <37260B94.2E2FBAF3@pacbell.net>, on 04/27/99
at 12:10 PM, bankspad <ban### [at] pacbellnet> said:
>>
>> Oh - you seem to think the lead is a textural device - while I never thought
>> of that - although NOW it seems obvious. The lead is another cylinder
>> entirely.
>I thought that it was. What I was thinking was that instead of using just
>the graphite pigment for the lead that you combine it with whatever wood
>texture (and parameters ) that was used for the pencil in the texture for
>the cylinder. I slapped together a real basic image, hope you don't mind.
>;-]
>KB-
>cone { <-1, 0.001, -1>, 0.001, <2, 4, 2>, 1.2
>texture {
>planar
>turbulence 0.4
>texture_map {
> [0.01 T_Wood23 finish { ambient 0.3 } scale 4 rotate z*-40 ]//whatever
>Wood texture you choose
> [0.2 pigment { rgb 0.65 } finish {specular 0.5 roughness 0.15 }]
> }
>translate y*0.6
>}
>}
The only thing I could add is that if you keep it as two
cylinders, add a certain randomness that places the lead
slightly off center, and possibly even the sharpened end.
When was the last time you were able to sharpen a pencil
in a perfectly aligned point?
--
============================================================
Dreams are renewable. No matter what our age or condition,
there are still untapped possibilities within us and new
beauty waiting to be born.
-- Dale Turner
============================================================
Tuesday, April 27, 1999 - 03:45 PM (EDT)
============================================================
_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_
+ + +
+ Chris C. Conner + con### [at] geocitiescom +
+ cco### [at] amerisurecom + con### [at] usanet +
+ + +
~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~-_-~
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That's what I call inspiration.
Cheers
Steve.
PS: thought I had one of my objects finished, now I've got to go
through the whole lot fixing the textures.
bankspad wrote:
>
> >
> > Oh - you seem to think the lead is a textural device - while I never thought
> > of that - although NOW it seems obvious. The lead is another cylinder
> > entirely.
>
> I thought that it was. What I was thinking was that instead of using just the
> graphite pigment for the lead that you combine it with whatever wood texture
> (and parameters ) that was used for the pencil in the texture for the cylinder.
> I slapped together a real basic image, hope you don't mind. ;-]
>
> KB-
>
> cone { <-1, 0.001, -1>, 0.001, <2, 4, 2>, 1.2
> texture {
> planar
> turbulence 0.4
> texture_map {
> [0.01 T_Wood23 finish { ambient 0.3 } scale 4 rotate z*-40 ]//whatever Wood
> texture you choose
> [0.2 pigment { rgb 0.65 } finish {specular 0.5 roughness 0.15 }]
> }
> translate y*0.6
> }
> }
>
> -----------------------------------------------------------------
> [Image]
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Whatcha makin'? Will we get to see? ;-]
KB-
Steve wrote:
> That's what I call inspiration.
>
> Cheers
> Steve.
>
> PS: thought I had one of my objects finished, now I've got to go
> through the whole lot fixing the textures.
>
> bankspad wrote:
> >
> > >
> > > Oh - you seem to think the lead is a textural device - while I never thought
> > > of that - although NOW it seems obvious. The lead is another cylinder
> > > entirely.
> >
> > I thought that it was. What I was thinking was that instead of using just the
> > graphite pigment for the lead that you combine it with whatever wood texture
> > (and parameters ) that was used for the pencil in the texture for the cylinder.
> > I slapped together a real basic image, hope you don't mind. ;-]
> >
> > KB-
> >
> > cone { <-1, 0.001, -1>, 0.001, <2, 4, 2>, 1.2
> > texture {
> > planar
> > turbulence 0.4
> > texture_map {
> > [0.01 T_Wood23 finish { ambient 0.3 } scale 4 rotate z*-40 ]//whatever Wood
> > texture you choose
> > [0.2 pigment { rgb 0.65 } finish {specular 0.5 roughness 0.15 }]
> > }
> > translate y*0.6
> > }
> > }
> >
> > -----------------------------------------------------------------
> > [Image]
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It'll be finished thes weekend I hope and will be posted on this
very NG for suggestions/coments, insults whatever.
Cheers
Steve
bankspad wrote:
>
> Whatcha makin'? Will we get to see? ;-]
>
> KB-
>
> Steve wrote:
>
> > That's what I call inspiration.
> >
> > Cheers
> > Steve.
> >
> > PS: thought I had one of my objects finished, now I've got to go
> > through the whole lot fixing the textures.
> >
> > bankspad wrote:
> > >
> > > >
> > > > Oh - you seem to think the lead is a textural device - while I never thought
> > > > of that - although NOW it seems obvious. The lead is another cylinder
> > > > entirely.
> > >
> > > I thought that it was. What I was thinking was that instead of using just the
> > > graphite pigment for the lead that you combine it with whatever wood texture
> > > (and parameters ) that was used for the pencil in the texture for the cylinder.
> > > I slapped together a real basic image, hope you don't mind. ;-]
> > >
> > > KB-
> > >
> > > cone { <-1, 0.001, -1>, 0.001, <2, 4, 2>, 1.2
> > > texture {
> > > planar
> > > turbulence 0.4
> > > texture_map {
> > > [0.01 T_Wood23 finish { ambient 0.3 } scale 4 rotate z*-40 ]//whatever Wood
> > > texture you choose
> > > [0.2 pigment { rgb 0.65 } finish {specular 0.5 roughness 0.15 }]
> > > }
> > > translate y*0.6
> > > }
> > > }
> > >
> > > -----------------------------------------------------------------
> > > [Image]
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>cone { <-1, 0.001, -1>, 0.001, <2, 4, 2>, 1.2
>texture {
>planar
>turbulence 0.4
>texture_map {
> [0.01 T_Wood23 finish { ambient 0.3 } scale 4 rotate z*-40 ]//whatever
Wood
>texture you choose
> [0.2 pigment { rgb 0.65 } finish {specular 0.5 roughness 0.15 }]
> }
>translate y*0.6
>}
>}
>
Been away for a bit. But getting back to this.....
Aha! I understand - and that would work great! Much less hassle than the CSG
chipping idea for the paint edge too - although I might toggle the two
schemes on a quality flag. Thanks!!
Aha!
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Cool! ;-]
Can't wait to see the finished macro.
KB-
Charles Krause wrote:
> >cone { <-1, 0.001, -1>, 0.001, <2, 4, 2>, 1.2
> >texture {
> >planar
> >turbulence 0.4
> >texture_map {
> > [0.01 T_Wood23 finish { ambient 0.3 } scale 4 rotate z*-40 ]//whatever
> Wood
> >texture you choose
> > [0.2 pigment { rgb 0.65 } finish {specular 0.5 roughness 0.15 }]
> > }
> >translate y*0.6
> >}
> >}
> >
>
> Been away for a bit. But getting back to this.....
>
> Aha! I understand - and that would work great! Much less hassle than the CSG
> chipping idea for the paint edge too - although I might toggle the two
> schemes on a quality flag. Thanks!!
>
> Aha!
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