Stephen <mca### [at] aolcom> wrote:

> You are not asking me?
> <Rolls on the floor hysterically.>
>
> ;-)

Knowing your love of math, I considered it.
I have a sense of humor like that.
{highfive}

Sometimes I think about what Christoph must wade through when he actually has to
code the engine that has to handle the SDL that I write to do the math and the
CSG and the render....

_"We bow before you, O Mighty Clipka, and beseech you to hear the praises of
your faithful followers, and bestow upon us the Inner Sslt, and the blessings of
your most exalted C++ subroutines.  Hear us, Oh Clipka, and trace us with the
doubly-illuminating rays of your most holy light_source, that we might reflect
upon your SDL and know that it is Good."


{Damn, this is good coffee!}

Post a reply to this message

On 3/8/2016 2:26 PM, Bald Eagle wrote:
> Knowing your love of math, I considered it.
> I have a sense of humor like that.
> {highfive}
>

High(2.2361)^2

{Fist bump}

> Sometimes I think about what Christoph must wade through when he actually has to
> code the engine that has to handle the SDL that I write to do the math and the
> CSG and the render....
>

That is funny. I never think of it. :-P


> _"We bow before you, O Mighty Clipka, and beseech you to hear the praises of
> your faithful followers, and bestow upon us the Inner Sslt, and the blessings of
> your most exalted C++ subroutines.  Hear us, Oh Clipka, and trace us with the
> doubly-illuminating rays of your most holy light_source, that we might reflect
> upon your SDL and know that it is Good."
>
>

Do you really want a mainland European changing your wetware?
We will end up driving on the wrong side of the road.

> {Damn, this is good coffee!}

Envy! Must use the last of my Blue Mountain.

Ah! Life is good.

-- 

Regards
     Stephen

Post a reply to this message

So, the interpolation is still flailing wildly, for some reason, and it will
likely be some time before I get a real feel for what this whole Thomas
Algorithm _does_, and why it's spazzing out.

It was mentioned that a condition for it stability is to stay away from 0, and
have |b| > |a| + |c|.   Still pondering that, but I flipped my column
interpolations upside down and it's a tiny bit better.

Might try to tone it down a bit and see about doing some animation on it, just
to see how it looks.

Post a reply to this message

Attachments:
Download '9smoothbicubicpatches_revised_columnsl2h.png' (301 KB)

Preview of image '9smoothbicubicpatches_revised_columnsl2h.png'

OK, the disproportionate bulge was due to a stray holdover number.
Now I can't for the life of me figure out what that flaw in the uv-mapping is
due to.   I've been over it all a dozen times.  Replaced patches B and E with
code copied directly from the other unflawed patches.
It's always _something_.

Still not sure exactly why my interior and exterior textures are reversed.
(The blue & red grid is the interior)
Tried reversing my uv vectors so they went counterclockwise, and that just
turned the map, didn't invert inside/outside.

Getting close, though.   Getting very very close.

Post a reply to this message

Attachments:
Download '9smoothbicubicpatches_revised.png' (570 KB)

Preview of image '9smoothbicubicpatches_revised.png'

"Bald Eagle" <cre### [at] netscapenet> wrote:
I also made a rough copy of the spline points that LeForgeron uses to run his
splines around and through, and ran the interpolation macro over it - 0 to 48
points, step 4.
Kiiiiinda wild.

Post a reply to this message

Attachments:
Download 'leforgeron_spline_cropped.jpg' (63 KB)

Preview of image 'leforgeron_spline_cropped.jpg'

On 3/10/2016 9:07 PM, Bald Eagle wrote:
> "Bald Eagle" <cre### [at] netscapenet> wrote:
> I also made a rough copy of the spline points that LeForgeron uses to run his
> splines around and through, and ran the interpolation macro over it - 0 to 48
> points, step 4.
> Kiiiiinda wild.
>

He was playing dominoes and chapped the table? :-)

What do the colours represent?


-- 

Regards
     Stephen

Post a reply to this message

Stephen <mca### [at] aolcom> wrote:

> What do the colours represent?


The Larger red points are the point array, the yellow spline is pov's cubic
spline & my sphere+cylinder sweep.
The green spline is a series of bicubic_patch ribbons generated from the data
points and my interpolated control points. The control points are color coded by
segment red-1 green-2 blue-3 - yellow-data.

Post a reply to this message

On 3/10/2016 11:16 PM, Bald Eagle wrote:
> Stephen <mca### [at] aolcom> wrote:
>
>> What do the colours represent?
>
>
> The Larger red points are the point array, the yellow spline is pov's cubic
> spline & my sphere+cylinder sweep.
> The green spline is a series of bicubic_patch ribbons generated from the data
> points and my interpolated control points. The control points are color coded by
> segment red-1 green-2 blue-3 - yellow-data.
>
>
>
>
It looks "interesting". A stunt plane's path and the pennant it's towing.
I know, I know. "Take more water with it." :)

-- 

Regards
     Stephen

Post a reply to this message

Le 10/03/2016 22:07, Bald Eagle a écrit :
> "Bald Eagle" <cre### [at] netscapenet> wrote:
> I also made a rough copy of the spline points that LeForgeron uses to run his
> splines around and through, and ran the interpolation macro over it - 0 to 48
> points, step 4.
> Kiiiiinda wild.
> 

The end should be a closed loop.... at least the yellow does not loop...

you seems to have problem with high frequency alternated position (center)

And it's hard to check/see the green part with a perspective camera (I used
orthographic)

Post a reply to this message

Attachments:
Download 'leforgeronspline09.png' (7 KB)

Preview of image 'leforgeronspline09.png'

Le_Forgeron <jgr### [at] freefr> wrote:

> The end should be a closed loop....

How does it close?
Do you go up from the base, then around clockwise to the same point, then out to
that tail, or
over and around counterclockwise, like a cursive "e" ?

> you seems to have problem with high frequency alternated position (center)

There's some sort of anomaly in my my interpolation macro that I haven't figured
out yet.  That first segment of the Bezier curve goes berserk.

> And it's hard to check/see the green part with a perspective camera (I used
orthographic)

It's a thin Bezier patch, so it would probably disappear completely if I used
orthographic.   I haven't written a macro to plot out the Bezier-type spline
using the control points, so in order to get the "right" curvature, I used
POV-Ray's bicubic patch.   It does the job well enough to show that the control
points are OFF.   :D

Post a reply to this message