algorithmic modeling for Rhino

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Topic: voronoi_drilling: me logic produced by running the 2-d voronoi component. From a given set of polylines we can extract the centers and this can drive both the voronoi component as well as provide the XYZ drill points for the cnc. The definition has a variety of different options. You need Lunchbox, Weaverbird, and Starling. I can't tell you how amazing these 3 tools are from a design perspective. They are extremely powerful so if you don't have these you must install them asap. You can get the tools at http://www.food4rhino.com/ This definition works by first choosing a grid type, next you choose voronoi type, and subdivision type. From the voronoi type list you can choose basic (just grid), truncation (uses truncation calculated via the image sampler), truncation dual (uses the dual of the truncated image based grid), and subdivision (takes the basic grid type and uses different subdivision shcemes). Each of these provide different patterns of polylines from which we can extract our drilling points. I am rather proud of this definition since the overall idea is one which is so simple it's easy to overlook - the idea that drilling with a ball end mill makes voronoi plots. Now when you combine that with all of these amazing tools it can go off right quick. The nice thing is the paatern you see on screen is the pattern that gets made by drilling wysiwyg cnc patterns. VORONIO_DRILLing.gh Here are some on screen patterns in process in the following order truncation, basic, subdivision: here is a video moving over a machined example: …; Added by machinehistories at 5:07pm on May 8, 2013

Topic: New tutorial - Developable strips - Part 1: l coarse mesh Subdividing this mesh into strips of thin quads Relaxing/Planarizing this mesh Splitting and Unrolling In this post I deal with the first 2 of these stages. You can download the example definition here: developable_strips_tutorial.gh Drawing the initial mesh To begin with we need a simple quad mesh. This can be modelled manually in Rhino, and only needs to use enough quads to give the topology and very rough form. No need to worry too much about the exact geometry or dimensions at this point, as we will refine and alter it as we go. One very important thing that we do need to bear in mind though is that all internal vertices must have even valence (I covered this a bit in the earlier post here). So for example, this is bad: (because the highlighted vertex is surrounded by 5 faces) While this is good (and can still be relaxed to the same shape): (the top and bottom vertices have valence 8, and the vertices between the arms have valence 4) With a little practice it should be possible to convert any mesh into one that meets this condition. The reasons why we need this condition should become more clear in the later steps. First subdivision This is where we choose how many strips we want our final model to have, by applying a few rounds of subdivision using the Refine component (you could also use Weaverbird here): Sorting the face directions While quad meshes do not carry the same information about u/v directions as a NURBS surface, the individual faces do have a sort of direction given by their vertex ordering. However, these face directions are usually not consistently arranged, especially after subdivision. The Kangaroo MeshDirection component attempts* to orient all the faces in a mesh so that they match with their neighbours. For example, before sorting, if we draw a line from the midpoint of the first edge of each face to the midpt of its opposite edge, we might get something like this: Whereas after sorting, we should get something like this: *note that I say it attempts to orient the faces consistently. In some cases no valid solution exists, for instance if 3 or 5 faces meet around a vertex, hence the requirement mentioned at the start for even valence vertices. Directional Subdivision Now that we have consistent face directions across the mesh, we can apply further subdivision, but this time in one direction only. So we go from roughly square quads to thin rectangles. The idea is that as we apply higher levels of this directional subdivision, the final relaxed result goes towards something semi-discrete. A NURBS surface is fully continuous, and a mesh is fully discrete (made up of separate facets), while this strip model will be smooth in one direction and faceted in the other. Go to part 2 for the next step of the process …; Added by Daniel Piker to Kangaroo at 7:34am on January 14, 2014

Topic: Complex geometry Glazing issues: ooking for an efficient way to perform glazing of complex shapes. I've only followed the Energy modelling workshops so far so i may have missed some essential components or workflows to achieve my needs. But i've made an attached definition with all my current attempts to get a proper HBzone with the numerous windows faces i will always have to deal with in this project. I first thought that i was not using the HBObjWGZ correctly, then after some readings it was maybe an upgrading issue, then effectively i had my Therm 7.5 that needed to be reinstaled, but then ... I must be missing an essential HB tricks or workflow i guess ... So I divided my attempt in two series : - The Serie 1 : is a simplier version of the project step i'm working on but i'd be glad to achieve it first ! - The Serie 2 : is the real final direction of the project, which consist in sorting/dispatch faces to windowon one side and to an other material on the other, according to the winter sun and a pourcentage param. Despite it is more complicated than the Serie one, it seems seems to create the same diversity of issues. Until now, with the 5 different combinations of Serie 1, and the 3 of Serie 2, with and without using the different Glazing/window components, here are the logs i got from both HBZone component or OpenStudio component: From OpenStudio - "1. The simulation has not run correctly because of this severe error: ** Severe ** BuildingSurface:Detailed="00073E23257843B6A948", invalid Construction Name="ETFE" - has Window materials.">> Has to deal with the way i'm trying to assign too early a customized EPConstruction material ? Done it wrong ? I tried to reload it in the library but doesn't change anything... From OpenStudio - "1. The simulation has not run correctly because of this severe error: ** Severe ** BuildingSurface:Detailed="000579CD749E46DFA5EA", invalid Construction Name="EXTERIOR WINDOW" - has Window materials.">> Is it an issue in the way i define my surfs both as "WINDOW" (5) for srfType and Outdoors on the same component ? From Create HBZone -"1. Solution exception:'EPZone' object has no attribute 'shdCntrlZoneInstructs'" >> Happens when i try to introduce my ETFE EpMaterial after creating my first HBZone, with a Set EP Zone Construction, so this material seems to be not working either before and after trying to create an HB Zone From Create HBZone- "1. Solution exception: 73df51a3b2144b1e858b has been moved, scaled or rotated."If you need to move or rotate a Honeybee object you should use Honeybee move, rotate or mirror components. You can find them under 12|WIP tab. >> >> wich seems to exist in some on other thread Here and was a coding bug supposed to be fixed. And last but not least ... From OpenStudio - "1. The simulation has not run correctly because of this severe error: ** Severe ** checkSubSurfAzTiltNorm: Outward facing angle of subsurface differs more than 90.0 degrees from base surface.2. The simulation has failed because of this fatal error: ** Fatal ** GetSurfaceData: Errors discovered, program terminates" . I'm attaching the file with each attempt in this post. The definitions are disabled and the log already copied separatly so there is no need to compute each of them to see what's wrong. If someone from the beginner to one of the Kings of HoneyBee has any relevant answer/solution to this attempt with complex geometry Issue it will be really nice for me so i could to move forward !! Thanks in advance guys and have a great day ! …; Added by edwin szabo to Ladybug Tools at 3:32am on July 6, 2017

Topic: Questions about Pachyderm options: y from the Rhino model and having the absorption coefficients of the materials that are entered into Pachyderm, why is it not possible to generate a reverberation time diagram, without the need to start any analysis? MAPPING METHOD: When for example the mapping of the Strenght Index (G) is generated through the "create map" option, succesively I can´t generate any other energy criterion map, but I have to redo the simulation. Is it a limitation of the software or am I wrong something? MAPPING METHOD: I kindly wanted to ask what is the difference between minimum and detailed convergence and why the number of reflections order it takes into account for the simulation is not specified. The mapping method take care only of the Raytracing Method or the Image Source too? MAPPING METHOD: Why is the mapping value that can be exported to Rhino not generated for all the calculation raster points, but maximal only for 100 values? MAPPING METHOD: This method hasn't been implemented in Grasshopper yet, has it? RAYTRACING METHOD (Pach:RT): I did a raytracing through the components of GH, using only the Pach_RT, and I had these curious results in terms of time: RaysCount: 15.000, IS_Order:1 = 5min RaysCount: 15.000, IS_Order:2 = 12min RaysCount: 15.000, IS_Order:3 = 3min RaysCount: 15.000, IS_Order:4 = 8min RaysCount: 15.000, IS_Order:5 = 3min Why a raytracing with only 2 order, is more and more extensive than the 3/4 and 5 order? ANALYSIS RESULT: Would there be a way to export all the results of a simulation, as is done via Odeon, to a .txt list? I apologize in advance for asking so many questions, I hope you can find the time to answer, Yours sincerely from Müller-BBM…; Added by G.C.Ruvio to Pachyderm Acoustic at 9:11am on September 2, 2021

Blog Post: rese arch LIVE Workshop: Let me invite you to the Grasshopper+Karamba workshop with Robert Vierlinger and Matthew Tam on 21-25 July 2015 in Bratislava, Slovakia.…; Added by Jan Pernecky at 6:28am on June 29, 2015

Blog Post: Start point and curve

Added by zlyx at 4:22am on July 20, 2010

Blog Post: Design Modelling Symposium Copenhagen: Workshops & Master Class

This fall the…

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Topic: Butterfly beta release for Grasshopper and Dynamo: ly has finally metamorphosed to have all known major bugs fixed and is ready to be used by a larger number of people in our community. Butterfly is powered by OpenFOAM, which is a validated and open-source engine for Computational Fluid Dynamics (CFD). Primarily, Butterfly assists with exporting geometry and other input parameters from the CAD + scripting interface to the OpenFOAM engine. The Grasshopper plugin supports live results visualization that updates as the CFD simulation iterates. The Dynamo plugin supports results visualization once the analysis is over or paused. For installation instructions and guidance on getting started, check out the Butterfly wiki page. There, you can find step-by-step installation directions and tutorial videos. There also 3 YouTube playlists for getting you started with installing OpenFOAM for Windows and using Butterfly for Grasshopper and Butterfly for Dynamo. Similar to other ladybug tools, Butterfly uses an external validated engine (in this case, OpenFOAM) and you need to install it first to get the insect up-and-running. However, unlike Radiance and EnergyPlus, OpenFOAM doesn’t have a native installation for Windows and it requires Linux to run. Accordingly, the current version of “OpenFOAM for Windows” uses a technology called docker to run a Linux virtual machine on your system, inside which OpenFOAM operates. While this sounds complicated, the good news is that all of this setup has been packaged into the installer for “OpenFOAM for Windows.” So running this installer with all its defaults should give you everything you need. The bad news is that the installation can fail if you don’t check your Windows system properly beforehand or don’t follow every step carefully afterwards. You will also need to run Rhino, Revit, and OpenFOAM as an administrator to ensure Butterfly works properly (by right-clicking each launcher for the program and selecting “Run As Administrator"). This said, if you follow the steps carefully, you should have no issues with the installation. You can find some of the issues that people faced during the alpha testing and the solutions to them here. Butterfly is the first plugin that is fully developed based on the structure that I discussed before which consists of a core library and [+] libraries for specific software (in this case Grasshopper and Dynamo). We hope this structure to extend ladybug tools to more platforms by re-using the current code. We will provide a better documentation with more details on this matter in the near future but for now you can use the API for butterfly, butterfly_grasshopper and butterfly_dynamo for customizing or extending the current development. Finally, having access to a powerful CFD engine from inside parametric/generative modeling environments is a great power and as Spider-Man or Uncle Ben once said: “with great power comes great responsibility!” We believe in learning by doing and we don’t expect you to be a CFD expert to get started with butterfly however we expect you to educate yourself along the way. If you have never used OpenFOAM before here is a great presentation to get started. We also highly recommend checking out the official OpenFOAM User Guide that goes through most of its functionality. Finally, we have also collected a number of other learning resources on this page that can be a good starting point. We understand that you will have questions about the plugins which you can post to this forum or Dynamo discussion forum however CFD related issues and questions should be posted to CFD Online. I like to thank everyone who have helped us with the development and testing during the last year or so, and special thank to Theodore who single-handedly educated me through the process of migrating to OpenFOAM and developing butterfly. Butterfly wasn’t possible without Theodore! As always let us know about your comments and suggestions. Happy flying the butterfly! Happy Spring! …; Added by Mostapha Sadeghipour Roudsari to Ladybug Tools at 11:06am on March 20, 2017

Comment on: Topic 'DataTree(of object) > GH_Structure(of ?)': 3. receiver gets data from sender via input (0) < the data here may be changed in the meantime, for instance if its a double then I would like to add 1 to it. 4. receiver sends data to sender's input(2) 5. go to 1. VS 2013 studio project folder SENDER Public Class loopStart Inherits GH_Component Dim cnt As Integer Friend Property counter() As Integer Get Return cnt End Get Set(value As Integer) cnt = value End Set End Property Dim iData As New GH_Structure(Of IGH_Goo) Friend Property startData() As GH_Structure(Of IGH_Goo) Get Return iData End Get Set(value As GH_Structure(Of IGH_Goo)) iData = value End Set End Property Public Sub New() MyBase.New("loopStart", "loopStart", "Start the loop with this one.", "Extra", "Extra") End Sub Public Overrides ReadOnly Property ComponentGuid() As System.Guid Get Return New Guid("bdf1b60d-6757-422b-9d2d-08257996a88c") End Get End Property Protected Overrides Sub RegisterInputParams(ByVal pManager As Grasshopper.Kernel.GH_Component.GH_InputParamManager) pManager.AddGenericParameter("Data", "dIn", "Data to loop", GH_ParamAccess.tree) pManager.AddIntegerParameter("Steps", "S", "Number of loops", GH_ParamAccess.item) pManager.AddGenericParameter("<X>", "<X>", "Please leave this one alone, don't input anything.", GH_ParamAccess.tree) pManager.Param(2).Optional = True End Sub Protected Overrides Sub RegisterOutputParams(ByVal pManager As Grasshopper.Kernel.GH_Component.GH_OutputParamManager) pManager.AddGenericParameter("Data", "dOut", "Data to loop", GH_ParamAccess.tree) End Sub Public Overrides Sub CreateAttributes() m_attributes = New loopStartAttributes(Me) End Sub Protected Overrides Sub SolveInstance(ByVal DA As Grasshopper.Kernel.IGH_DataAccess) Dim numLoop As Integer DA.GetData(1, numLoop) Dim loopDt As New Grasshopper.Kernel.Data.GH_Structure(Of IGH_Goo) If cnt = 0 Then Me.startData.Clear() DA.GetDataTree(0, Me.startData) loopDt = startData.Duplicate DA.SetDataTree(0, loopDt) End If If cnt < numLoop - 1 And cnt > 0 Then DA.GetDataTree(2, loopDt) DA.SetDataTree(0, loopDt) Me.ExpireSolution(True) Else DA.GetDataTree(2, loopDt) DA.SetDataTree(0, loopDt) End If cnt += 1 End Sub End Class RECEIVER Public Class loopEnd Inherits GH_Component Dim aData As New GH_Structure(Of IGH_Goo) Friend Property anyData() As GH_Structure(Of IGH_Goo) Get Return aData End Get Set(value As GH_Structure(Of IGH_Goo)) aData = value End Set End Property Public Sub New() MyBase.New("loopEnd", "loopEnd", "End the loop with this one.", "Extra", "Extra") End Sub Public Overrides ReadOnly Property ComponentGuid() As System.Guid Get Return New Guid("3ffa3b66-8160-4ab3-87c9-356b2c17aadd") End Get End Property Protected Overrides Sub RegisterInputParams(ByVal pManager As Grasshopper.Kernel.GH_Component.GH_InputParamManager) pManager.AddGenericParameter("Data", "dIn", "Data to loop", GH_ParamAccess.tree) End Sub Protected Overrides Sub RegisterOutputParams(ByVal pManager As Grasshopper.Kernel.GH_Component.GH_OutputParamManager) pManager.AddGenericParameter("Data", "dOut", "Data after the loop", GH_ParamAccess.tree) End Sub Protected Overrides Sub SolveInstance(ByVal DA As Grasshopper.Kernel.IGH_DataAccess) Me.aData.Clear() DA.GetDataTree(0, Me.aData) runner() DA.SetDataTree(0, Me.aData) End Sub Sub runner() Dim doc As GH_document = Grasshopper.Instances.ActiveCanvas.Document Dim docl As list(Of iGH_DocumentObject) = (doc.Objects) For i As Integer = 0 To docl.count - 1 Step 1 Dim comp As Object = docl(i) If comp.NickName = "loopStart" Then Dim compp As IGH_Param = comp.Params.input(2) compp.VolatileData.Clear() compp.AddVolatileDataTree(anyData) Exit For End If Next End Sub End Class …; Added by Mateusz Zwierzycki at 2:47pm on November 28, 2013

Comment on: Topic 'Thoughts on bouancy driven natural ventilation': looked at autodesk simulation cfd 2015 and was optimistic because it had an export plugin from revit, which i use anyway for material takeoffs and etc, but found that it did not take solar radiation into account. This was a downer because I have heard that solar radiation could effect indoor airflow - convection - as much as 50 percent at a time. Then I searched again and found that Hyperworks, a software by altair technology can be coupled with a radiation software. So I went through the trouble of obtaining an educational license of Hyperworks. However, though some email exchange I have found that the coupling is a one-way. The radiation analysis software was used, I think, for understanding the solar loading for a SOM project called church of light. The support guy said : "Unfortunately our coupling with Hyperworks is really a one way coupling. We can accept H coefficients from their software in RadTherm, but they will not read in our wall temps. That said, it still can be a useful coupling in the sense that you can run the analysis in Hyperworks, send H coefficients to RadTherm, and run the analysis to better understand radiation and conduction. Most importantly, that analysis can be done for longer transient analysis, but will require much less compute time and resources." Not only did I not understand what he means by the H coefficients, my wanting to get a CFD understanding coupled with solar radiation was again, unsatisfied. In the mean while I had to finish a presentation so I haven't had the time to try to get some result on the natural ventilation. I would probably need to look into how their solutions work before I can understand if their software would "do the job" Thank you for letting me know about your work on this. I downloaded the Honeybee_Set EP Natural Ventilation component and made sure that it is allowed, but it does not show up in grasshopper. You pointed out that "The component (and the corresponding equation) is mostly meant for cases where you have zones with windows that are NOT connected by an air wall (or a larger airflow network)." I wondered if you are suggesting it would be a code violation for zones to be connected by an air wall for fire safety reasons. It would be a violation I guess, like not putting an fiber insulation or some kind of smoke stop between Spandrel panels and the edge of a floor plate would be a code violation for a typical office building. There is a project by kevin daly architects where you can see a section drawing with what seems like a cfd analysis (could be an illustration) it was my initial visualization/simulation goals were for a facade design I am working on 1) an average air velocity across a zone at noon, for example, if a passive design strategy like this was used. for this I am guessing cfd is not entirely necessary. probably means that it could be used earlier in a design process, too. This would be more about user comfort. 2) at a later phase, like in detailing facade components, if airflow is indeed as expected for a zone that is connected to an air wall / chimney like feature (and to see if there is a proper mixing of air) 3) and a projection of energy savings, of course. After seeing a video of simulation cfd I was optimistic, but like I said sim cfd does not take account of solar loading. I think I would probably go ahead start with one zone with sim cfd first, try three zones stacked on top of each other, then try hyperworks and try to factor in solar radiation. For analyzing multiple zones on different levels, being able to add a chimney would be especially useful, I think. Having said that, I don't have a lot of experience of using honeybee except for the daylight component so it would take some time for me to understand the components. I hope some of the information here is useful for you. after all, both sim cfd and hyperworks are commercial softwares and somewhat different than the e plus project you are working on, I guess but still trying to address a similar problem. so.. in cased you missed it I was asking I downloaded the Honeybee_Set EP Natural Ventilation component and made sure that it is allowed and placed in the user object foler, but it does not show up in grasshopper. what could be the reason? …; Added by yj to Ladybug Tools at 9:32am on January 10, 2015