a spline? In a more general setting of semi-algebraic sets there is the Tarski-Seidenberg Theorem http://en.wikipedia.org/wiki/Tarski%E2%80%93Seidenberg_theorem that says the projection of a semi-algebraic set is itself a semi-algebraic set. As nurbs surfaces and breps defined by them are semi-algrbaric sets this means that the projection must be reasonably nice. I could not discover whether it is always a spline. There are however reasonably nice ways to get splines from algebraic curves, though we are back to an approximation. It would be nice to have an algorithm that is guaranteed to give the precise splines when they exist (as in the example above) and will otherwise give a good approximation, I was not able to find if one has been written, even in the theoretical literature.…
define the "numOfContours_: input to 2, the terrain geometry will have only two isohypses from its highest to the lowest point. With 80, you will have 80 of them. Have in mind that if "standThickness_" input is larger than 0 (it means a stand will be created below the terrain), then the isohypses will be applied to the stand as well, as it is the continuation of the terrain.
To get the terrain elevation legend, one needs to use the "Terrain Analysis" component. Check the attached file. I changed the "source_" input, because your location is Paris suburb. In this cases the "source_=2 (GMRT - underwater terrain)" will also generate the land terrain as well. But with less precision than source_=1 and 2, which are meant to be used for land terrain.Please let us know if you have any other questions.…
Added by djordje to Gismo at 3:18pm on April 1, 2019
curve B
B1--------------------------B0
You define distances:
|A0 B0|
|A0 B1|
|A1 B0|
|A1 B1|
And find the smallest one. Then, based on the number of the shortest distance:
Flip A, Leave B
Flip A, Flip B
Leave A, Leave B
Leave A, Flip B
A more advanced metric would be to create all 4 blends, then pick the one that is shortest. Maybe that works better for what you want, maybe not.
--
David Rutten
david@mcneel.com…
Added by David Rutten at 8:09am on February 11, 2014
rkup) as below:
float coeff_perez [] is from Perez's paper in solar energy vol. 50, No.3. pp235-245, 1993.
i would like to adjust A3, A4, A5, A6 and A7 using measurement irradiance data over a whole year for every minute or hour, and update these coefficients under the file perezlum.cal. It means i may need to re-compile gendaylit.exe, which i have no idea how to do it.
i found radiance has another version on gendaymtx.c v2.13. it includes static const double PerezCoeff[8][20]. I am wondering which version of gendaymtx does ladybug GenCumulativeSkyMtx use.
Thanks for your suggestions on honeybee plugin. I will take a look and see how.
Cheers,
Le
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, so using distance to centre point, you can give all the useless values a 1. Cutting down the values you actually need to work out by 80%. Which is helpful when approaching 1 million points.…
is allowed to be increased, depending on the air speed as specified in Table 5.4.2.4, which can be as high as 2.2 degree.
So, I assume the height of the "hump" is about 2.2 degrees from the upper acceptability limit (80% or 90%).
Appreciate your advice if the understanding here is not correct.
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