rld.wolfram.com/EnnepersMinimalSurface.html
when i type the equations for z,y,z it says a syntax error so i obviously do not understand how to construct an expression. (screen capture attached)
Any help/explanation of using this function would be greatly appreciated
thanks so much
Capture.JPG…
n account of the position of the sun and weather cannot be expressed in terms of a single set of luminous intensity values (which is what IES files do).
With regards to your example files, I agree with Chris. The primary reason for the low illuminance levels is that the light bounces are getting lost in the tube. Have you checked with the manufacturer/distributor if the location of the IES file should be inside the tube and not flush with the ceiling? Physically modelling such tubes in lighting software like Radiance (which is what HB uses) or AGI32 is a fairly expensive proposition. This is one of the reasons why manufacturers provide photometric data for such devices (however simplistic that data might be).
The candelamultiplier increases or decreases the luminous intensity values. So it will have a direct impact on the calculation. The primary reason for having that input was to enable users to do some testing with different lamp types and environmental factors such as dirt depreciation. You need not change them for your simulation. Assuming that the IES file is inside the tube, in order to make this calculation work inside HB you'd have to crank up the calculation settings to a very high level (start with -ab 10 -ad 4096).
Finally, due to shortcomings in the annual simulation software (Daysim), IES files will not work directly work with annual calculations. However, there is a fairly easy workaround for that issue. In case you are planning to run annual calculations with IES files, please let us know here.
Sarith…
ing illuminance and limiting exposure (lux hours). Hours with direct solar irradiance are likely to exceed the limiting illuminance thresholds, which range from (200 to 50 lux as per Table 3.4 in CIE 157:2004). It makes sense to consider direct illuminance (an ab=0 simulation in Honeybee) separately from a normal illuminance calculation.
Assuming that the museum exhibits have low to high responsivity to light, an ideal solution would minimize direct sunlight. For daylight from the sky and reflected light, it might be enough to keep the illuminance levels below the recommended thresholds and then sum up lux-hours.
Daysim, the annual daylighting engine used by Honeybee and DIVA, is not very accurate for direct-sun calculations. You will get more accurate results if you run your analysis with Radiance directly.
Instead of considering the horizontal illuminance grids, one can create grids that correspond to the dimensions of the exhibit and then average those values. I think single points, as shown in your gh file might not suffice. Calculating lux-hours is by far the simplest part of such a simulation. It will only require averaging these points, extracting them into an array and then summing up that array.…
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try to get the output. In this case the output needs to be set before requesting for it. I am doing it with this call:
ret = gsaobj.Output_Init_Arr(1,"Global","A1",14003001,3)
In API help the call is documented like this:
short Output_Init_Arr (long iFlags, string sAxis, string sCase, enum ResHeader header, long num1dpos)
so this call has 5 arguments (long, string, string, long, long) (the enums are defined as longs)
This call works, because when I print the ret, i get 0 that is "succeded" so everything works so far.
Then I request the output with the following:
results = []
ret = gsaobj.Output_Extract_Arr(10,results,numcomponents)
In API help the call is documented like this:
short Output_Extract_Arr(long iRef, SAFEARRAY(struct GsaResults)*arrayResults, long* numComponents)
I am getting the error "
Runtime error (ArgumentException): Could not convert argument 1 for call to Output_Extract_Arr."
So it seems that is not accepting 10 as a long in the beginning (assuming that argument 1 is the first). I already tried passing a variable as long, using long(10) there, nothing works.
Furthermore I don't know if the other two variables are correct like that. I come from VBA where I need to declare everything but AFAIK python is more permissive in this sense. "results" should be a dynamic array of objects and "numcomponents" a long.
Any help would be appreciated!
Thanks! :)
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2d grid from
grasshopper but in 3d, fully controllable of course. I want to do something
like the image in this web
site:http://news.cnet.com/Photos-Weaving-high-tech-fabrics-of-the-future—page-12/2009-1008_3-5667576-12.html
I figured that connecting points and lines kind of works (point and line input AB command) but the line length changes when I move a
point. What I want to be able to do is to move a point and drag others but keep
the line segments constant, just as a real net.
…
Added by Jesus Garza at 8:28am on February 23, 2010
ehow acquire different settings/are calculated differently. Appears at random “rows” of points, sometimes it all works fine, so I need to do a series for the error to show. See images below.
In the Ladybug fly run the VT of the window changes.
It’s taken me a day and a half to track this error down. Phew.
I get the same error on two different comps.
What is causing this? Does anyone get the same error? Images below created with RADquality set to 2, and 7 cores. Fiddling with Radsettings dont help, I think, except error goes away with very low ab.
…
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