ey provide all the means to what I try to achieve.
What I need is to get a fast (as possible) evaluation of passive heat/solar gain from a certain facade. I know my building can cool to a certain degree (lets say 80 W/m2 - now lets forget other internal gains) and I want to be sure my facade is not letting excessive amounts of heat into the room/building. Normally I would make a full blown simulation to count my overheating hours and thereby evaluate my facade. To speed up the process, the idea is just to evaluate overheating hours in a faster way. So what I am thinking is that excessive amounts may estimated by counting high intensity irradiation patches in a critical sky-component or whatever such thing would be called that surpasses my sensible cooling load. My hope is that any facade visible to the sky-patches would very similar to the number of overheating hours if properly calibrated to a simulated model. However I have no idea right now, if this can be done.
Why do this? Speed, convenience, whole building thermal analyses.
@Chris and @Abraham The critical sky-component is made with LBs radiance component radiation and filtering the beam-components with highest effects from a yearly epw-file.
@Chris Conductive heat gains are also important especially if the facade is badly insulated, so the next step is to filter the outdoor temperature parallel with that critical sky-component and then do a static heat transfer analysis and combine that with the effect from direct sun influence. Again, no idea if it works.
Hope it makes sense. I a little embarrassed I drew you into this little experiment. This was not at all the point of the discussion. But now we are into it I like to know what you think. If it works its kinda neat, at least i think it is.
/K…
pts organize in a data tree without losing the data structure. To create a folding surface as per image attach.
1. Replace items (to create a gradient) / Like the weight culling example.
Path {0} replace all indexes with a new value (a)
Path {1} replace 90% indexes with a new value (a)
Path {2} replace 80% indexes ...
2. Decrease value (a) in relation to path number
3. After Replace the above items value with
for even path number {0,2,...} replace items with a negative number
Did not find a easy way to create data tree that would achieve the above inside GH.
Point 2 & 3 are easy but i could not found a simple solution for points 1.
At the moment the only way i found is to create the list in Excell manually and import/ export or to create a list on indices for each path.
Any hint appreciated.
Might need to wait for the number slider or path mapper to accept input or notation ?
best
Stephane
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ace Syntax." eCAADe 2013 18 (2013): 357.
http://www.sss9.or.kr/paperpdf/mmd/sss9_2013_ref048_p.pdf
The measure Entropy is newer. I hereby explain it (from my PhD dissertation):
Entropy values, as described in (Hillier & Hanson, The Social Logic of Space, 1984) and specified in (Turner A. , “Depthmap: A Program to Perform Visibility Graph Analysis, 2007), intuitively describe the difficulty of getting to other spaces from a certain space. In other words, the higher the entropy value, the more difficult it is to reach other spaces from that space and vice-versa. We compute the spatial entropy of the node as using the point depth set:
(11)
“The term is the maximum depth from vertex and is the frequency of point depth *d* from the vertex” (ibid). Technically, we compute it using the function below, which itself uses some outputs and by-products from previous calculations:
Algorithm 4: Entropy Computation
Given the graph (adjacency lists), Depths as List of List of integer, DepthMap as Dictionary of integer
Initialize Entropies as List(double)
For node as integer in range [0, |V|)
integer How_Many_of_D=0
double S_node=0
For depth as integer in range [1, Depths[node].Max()]
How_Many_of_D=DepthMap.Branch[(node,depth)].Count
double frequency= How_Many_of_D/|V|
S_node = S_node - frequency * Math.Log(frequency, 2)
Next
Entropies [node] = S_node
Next
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neybee?commentId=2985220%3AComment%3A1257744&xg_source=msg_com_gr_forum
is useful to replace values (even if I cannot replace the same value for example "fraction radiant" in two different internal gains), but not to add new stuff, as in our case.
As you may recall, we were able to add our internal gains through the additional strings, but we have the problem of the default ones that we can not change or remove.
We've noticed that People, Lights and ElectricEquipment Internal gains are located inside the "runEnergySimulation" honeybee command inside the Python script.
We were thinking of two possible quick alternatives while waiting to be able to fully customize the internal gains with honeybee.
For the first one, if it is possible, you could make a "modified" "runEnergySimulation" command for us in which you cut off the Internal Gain parts, so that we can add them as text in the additional strings part. Alternatively you could show us where to add the additional strings we need inside the runEnergySimulation command so that we can add the values we need to run the simulation.
For clarity, these are the internal gains in idf file we need (that are inside de gh file in the panel just below the additional strings command)
Lights,, !- Name, !- Zone or ZoneList Name, !- Schedule Name Watts/Person, !- Design Level Calculation Method , !- Lighting Level {W} , !- Watts per Zone Floor Area {W/m2} 16, !- Watts per Person {W/person} 0.2, !- Return Air Fraction 0.59, !- Fraction Radiant 0.2, !- Fraction Visible 0, !- Fraction Replaceable GeneralLights; !- End-Use Subcategory
People,, !- Name, !- Zone or ZoneList Name, !- Number of People Schedule Name People, !- Number of People Calculation Method 4, !- Number of People , !- People per Zone Floor Area {person/m2} , !- Zone Floor Area per Person {m2/person} 0.3, !- Fraction Radiant , !- Sensible Heat Fraction attività metabolica, !- Activity Level Schedule Name 0.0000000382, !- Carbon Dioxide Generation Rate {m3/s-W} , !- Enable ASHRAE 55 Comfort Warnings ZoneAveraged, !- Mean Radiant Temperature Calculation Type , !- Surface Name/Angle Factor List Name, !- Work Efficiency Schedule Name ClothingInsulationSchedule, !- Clothing Insulation Calculation Method , !- Clothing Insulation Calculation Method Schedule Name, !- Clothing Insulation Schedule Name, !- Air Velocity Schedule Name AdaptiveCEN15251; !- Thermal Comfort Model 1 Type
ElectricEquipment,, !- Name, !- Zone or ZoneList Name, !- Schedule Name Watts/Area, !- Design Level Calculation Method , !- Design Level {W} 5, !- Watts per Zone Floor Area {W/m2} , !- Watts per Person {W/person} 0, !- Fraction Latent 0.3, !- Fraction Radiant 0, !- Fraction Lost General; !- End-Use Subcategory
Thank you very much!Filippo
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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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thought that architect's love for drawing comes from the necessity of translate abstract ideas into built 3D reality, and the technology behind that 2D representation has not evolve so much until some decades ago. Our teachers come from that times: times when computers try to find their place in the reality representation world. If you try to imagine that people that have always drawn with pencils adapting to this new tools...some become fan of new methods, other just keep the old fashion workflow (like Andrew said in the article, Schumacher VS Graves)
We've bear (at least Andrew and me :P) in 80's with first video games, computers (I still remember my old x286 with 1Mb RAM and 20Mb of HD and that MS-DOS interface)...New technology was natural for us...But there is a big difference between traditional drawing and new computer aided tools: the learning curve. To draw you only need to take a pen and put over a paper (that interface is understood by children easily) , but traditional computational tools (new touch interfaces are out of this group) are based in a complex logic and environment that is not easy to understand for some people.
In the workshops I'm teaching in, I try to put all that tools (new and old one) in my students hands and motivate them to mix and use them together (Andrew knows a little bit about that :P). Why not to make a lines sketch with GH and then print it and render with some markers?; the last step could be scan the result and enhance it in Photoshop adding textures, vegetation, some background...There are no rules, only a bunch of tools to explore and use to develop your ideas, evolve and finally represent them.
I bet to the touch interfaces (with some augmented reality sauce) like that one that will be able to blend both worlds, analog and digital, offering that fluidity and natural interaction that Grave miss in digital tools. And our generation attached to this "not natural" interfaces will need to change its mind and adapt to that new and amazing interface that our children will love.
Only to complete:
<iframe width="560" height="315" src="http://www.youtube.com/embed/aXV-yaFmQNk" frameborder="0" allowfullscreen></iframe>…
Added by Ángel Linares at 5:40pm on September 10, 2012
e volume. The yellow line above.
This volume, green on the above image
So with this there was an intersection with the Brep volume of the chair and the lattice.
After that I used cocoon. Here the parameters I used for the Brep and curve. So The Brep was offsetted.
The model is 80 unit height and cell size is 0.2 so roughly there are 400 divisions in Z. If cubic it will give 6.4 millions of cells. To my point of view it is important to choose well the cell size in order to have not hundred of million of cells. Here 6 millions was usable. The general thing with Cocoon is alwas to test it on small objects first.
A close view of mesh. Edge length is 0.1 unit. There are 6 millions of triangles.
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