Search found 21086 matches

by jdaw1
23:48 Tue 16 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

It didn’t print well. Some polishing of the output later, I’d welcome people test-printing, on A3, both • 20190716_Droplets_t.pdf and • 20190716_Droplets_f.pdf . Please inspect smoothness of shape and greys of droplets. Which works? Which doesn’t? (Identify by different top-right headers: _f = two n...
by jdaw1
21:24 Sat 13 Jul 2019
Forum: Port Conversations
Topic: An Oddity
Replies: 6
Views: 291

Re: An Oddity

Will W. wrote:
16:45 Sat 13 Jul 2019
with taking up valuable space on this forum.
The discussion is valuable. The space is cheap. Be not shy about posting.
by jdaw1
01:10 Sat 13 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: 1991 Horizontal Tasting - Monday 9th December 2019 - B&F
Replies: 22
Views: 536

Re: 1991 Horizontal Tasting - Monday 9th December 2019 - B&F

winesecretary wrote:
23:41 Fri 12 Jul 2019
initial post mentions the issue.
Mea culpa.
by jdaw1
23:11 Fri 12 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: 1991 Horizontal Tasting - Monday 9th December 2019 - B&F
Replies: 22
Views: 536

Re: 1991 Horizontal Tasting - Monday 9th December 2019 - B&F

winesecretary wrote:
22:04 Thu 11 Jul 2019
on Monday 9th December 2019 in the Red Room at the B&F
Are you aware that on Mondays the B&F closes at 10pm; on other weekdays at 11pm. If you were not so aware, please allow a suggestion that this be moved forward one day, to Tuesday 10th December 2019.
by jdaw1
19:26 Thu 11 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

akzy wrote:
08:04 Thu 11 Jul 2019
I presume that 'eps' is some step constant?
It’s epsilon, hence all the limiting to zero.
by jdaw1
01:13 Thu 11 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

jdaw1 wrote:
20:10 Wed 10 Jul 2019
akzy: please check jdawiseman.com/2019/20190710_dAngle_dDistance.pdf. Thank you.
File updated to include cross terms (doh!).
by jdaw1
23:26 Wed 10 Jul 2019
Forum: Port Conversations
Topic: Congratulations Tony!
Replies: 8
Views: 390

Re: Congratulations Tony!

Indeed, well done Tony.
by jdaw1
23:23 Tue 09 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

akzy wrote:
23:48 Fri 05 Jul 2019
(I found these lecture slides which might help you get what you want, see pages 3 and 4 especially http://homepages.inf.ed.ac.uk/rbf/CVonl ... ffgeom.pdf)
I think not. It has curvature in a 3d sense. I want to know how fast the grad turns within the plane.
by jdaw1
10:04 Sat 06 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

Providing your postscript code is fine with calculating potgrid analytically It can. How? More of a curiosity thing than anything. Differentiating analytically using a computer is something I never fully understood (I'm still convinced that wolfram works using magic). If you know of any good explan...
by jdaw1
09:59 Sat 06 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

I think you will need to make some exceptions for your starting seeds in the gaps between circles to take into account global and local symmetries. Each seed cannot sit on a line of symmetry and must instead sit slightly off (so then it has a definite direction to fly off in, and isn't confused by ...
by jdaw1
22:45 Fri 05 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

akzy wrote:
21:05 Fri 05 Jul 2019
h=c / |∇v(x,y)|,

where c is a constant that we chose (be this a few millimeters or whatever works best).
I suspect that curvature, or equivalently ∂angle/∂distance, are related to something like curl÷|grad|². Please help with the specific formal relationship.
by jdaw1
19:57 Fri 05 Jul 2019
Forum: Port Conversations
Topic: Wanted: 2005s VP
Replies: 3
Views: 295

Re: Wanted: 2005s VP

I’ve nudged two people likely to be able to help, but others might too.
by jdaw1
19:56 Fri 05 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

akzy wrote:
10:39 Fri 05 Jul 2019
∇v is the way to do it.
Let’s say both ∇ and ∇× (grad and curl) are known. What expression is the distance that may be travelled without turning by an angle of more than a°?
by jdaw1
07:48 Fri 05 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

This seems similar to what I proposed before Sorry: hapy to acknowledge your prior art, and my slowness of understanding. Providing your postscript code is fine with calculating potgrid analytically It can. just an evaluate, advance, re-evaluate. Yes. The darkness of this droplet should be normalis...
by jdaw1
23:18 Wed 03 Jul 2019
Forum: Port Tasting Notes
Topic: 2017 Vesuvio
Replies: 3
Views: 744

Re: 2017 Vesuvio

V17: Eight days later, it had grown. Others had gone sideways, but it had grown. The Vesuvio had settled beautifully, no greenness, just deep plum sweetness. My mind has changed from ‘uncertain’ to ‘impressed’.
by jdaw1
20:18 Tue 02 Jul 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

This might be easy. • Don’t have the complicated lines. Instead have separate droplets, starting thin pale grey, ending thicker darker. • Droplets start on a jittered hexagonal grid. Average distance a parameter, perhaps defaulting to 36pt = ½″ = 12.7mm. • Droplets advance in small steps downhill (2...
by jdaw1
23:01 Sat 29 Jun 2019
Forum: Site Stuff
Topic: Monospace tag support
Replies: 4
Views: 812

Re: Monospace tag support

So tt is for inline monospace, and
monospace
is for multi-line monospace. Please confirm.
by jdaw1
10:13 Sat 29 Jun 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

Are you able to implement python in postscript? If so matplotlib has the stream plot coded out for you https://github.com/matplotlib/matplotlib/blob/master/lib/matplotlib/streamplot.py Another option is manually translate into whatever language. {Shudder} Translating that to PostScript would likely...
by jdaw1
10:04 Sat 29 Jun 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

I agree with the preference, because of the inward/outward pointing of the lines, though I would also prefer macro symmetry; I was hoping to achieve the former with the regular hexagon plan by moving the charges further inside, but alas that doesn't seem sufficient. First ( .nb ) has shuffled charg...
by jdaw1
23:56 Fri 28 Jun 2019
Forum: Organising Tastings and Get-togethers
Topic: Software that makes placemats
Replies: 1192
Views: 299602

Re: Software that makes placemats

The first of your two examples does set the charges on hexagonal points as suggested, but puts them on the circle perimeter - I think it would work better if they were at ~85% of the radius. .nb h = 297 (360/127) - 30 - 24; w = 210 (360/127) - 24 - 24; r = w/4; rr = 0.85 r; Clear["yy"]; yy = yy /. ...