algorithmic modeling for Rhino

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Topic: Difference between MRT calculation methods: . From the Thermal Comfort Indices component, Comfort Index 11 (TCI-11):MRT = f(Ta, Tground, Rprim, e) with:- Ta = DryBulbTemperature coming from ImportEPW component- Tground = f(Ta, N) where N comes from totalSkyCover input. Tground influences the long-wave radiation emitted by the ground in the MRT calculation.- Rprim defined as solar radiation absorbed by nude man = f(Kglob, hS1, ac)- ac is the clothingAlbedo in % (bodyCharacteristics input)- I can't find any definition in the code of Kglob and hS1. Could you tell me please what are those values referencered to? --> probably the globalHorizontalRadiation but how?- e = vapour pressure calculated from Ta and Relative Humidity input Do you agree that in this case the MRT does not depend on these inputs: location, meanRadiantTemperature, dewPointTemperature and wind speed?It does not depend neither on the other bodyCharacteristics like bodyPosture, age, sex, met, activityDuration...? MRT calculated by the TCI-11 method is the mean radiant temperature of a vector pointing vertically with a sky view factor of 100%?For ParisOrly epw, 2. From the SolarAdjustedTemperature component (that seems to be more used for the UTCI calculation examples on Hydra compared to TCI-11). In contrast to the TCI-11, this component distinguishes diffuse and direct radiation and contextualizes the calculation thanks to _ContextShading input, right? It can also be applied to a mannequin thanks to the CumSkyMatrix and thus evaluate the dishomogeneity of radiation exposure.This component seems not to consider the influence of vapour pressure on the result --> is it then more precise to put the MRT output (from the TCI) as an input of meanRadTemperature for SolarAdjustedTemperature?The default groundReflectivity is set to 0.25 --> is GroundReflectivity taken into account in the Tground or MRT calculation in the TCI component? If yes, what is the hypothesised groundReflectivity?The default clothing albedo of 37% (TCI-11 bodyCharacteristics) corresponds to Clothing Absorptivity of 63%? If the CumSkyMatrix input is not supplied, I get 9 results for the mannequin --> where are those points/results coming from? If the CumSkyMatrix input is supplied,I suppose the calculation of the 482 results correspond to a calculation method similar to the radiation analysis component that is averaged over the analysis period. Right?But I don't understand why the mannequin is composed of 481 faces and meshFaceResult gives 482 results. Finally, what is the link between the MESH results, the solarAdjustedMRT and the Effective Radiant field ? Is there a paper to have a detailed explanation of the method? 3. Here are some results for the ParisOrly energyplus weather data. You can find here attached the grasshopper definition.There is no shading in this simulation and the result coming from the ThermalComfort indices for MRT is very different compared to the solar adjusted MRT.Why such a big difference and which of the result should be plugged into the UTCI calculation component? Results for ParisOrly.epwM,D,H:1,1,12 Ta : 6.5°Crh: 100%globalHorizontalRadiation: 54 Wh/m2totalSkyCover: 10MRT (TCI-11): 1.2°C _CumSkyMtxOrDirNormRad = directNormalRadiation : 0 Wh/m2diffuseHorizontalRad: 54 Wh/m2_meanRadTemp = TasolarAdjustedMRT: 10.64°CMRTDelta: 4.14°C _CumSkyMtxOrDirNormRad = CumulativeSkyMtxdiffuseHorizontalRad: 54 Wh/m2_meanRadTemp = TasolarAdjustedMRT: 10.47°CMRTDelta: 3.97°C _CumSkyMtxOrDirNormRad = CumulativeSkyMtxdiffuseHorizontalRad: 54 Wh/m2_meanRadTemp = MRT (TCI-11)solarAdjustedMRT: 5.17°CMRTDelta: 3.97°C Thanks a lot for your helpRegards, Aymeric …; Added by Aymeric to Ladybug Tools at 8:29am on May 2, 2016

Topic: Gismo 0.0.1 released !: hope this number will grow in future. Currently available features are: 1) Creation of 2d or 3d context for any kind of building related analysis: automatically generate the 2d/3d surrounding buildings for the location where you would like to perform visibility, solar radiation, cfd or any other type of analysis. You need some other plugin for the last three, like Ladybug. It only creates the context=surroundings! The "automatic generation" process also includes creation of the local topography (terrain) along with buildings. 2) Identification of certain 2d or 3d elements in the created context. For example: selection of all hotels, parks, hospitals, restaurants, residential buildings etc. 3) Performing direct terrain analysis (hillshading, slope, ruggedness, roughness, water flow...) 4) Creation of terrain shading masks and horizon files for further solar and photovoltaics analysis. Gismo will be very grateful if he could get any suggestions, improvements, bug reports and testing in the following period. In case you are willing to provide any of these, the requirements, installation steps and .gh example files can be found here, here and here. Thank you in advance !!…; Added by djordje to Gismo at 9:10am on January 29, 2017

Topic: Help! link external midi to GH data via UDP: via MIDI controllers. my idea is to link PureData to GH via UDP. why pure data? cause' i can relate data like GH to generate numeric relations (and link it to audio generation) so far i got PD and Processing to talk, but i can't get to grasshopper. i use this definitions to make pd and processing to talk http://ubaa.net/shared/processing/udp/ and this GHX to get the data to GH http://www.grasshopper3d.com/forum/attachment/download?id=2985220%3... i got this data from this post but the GH definition doesn't work for me. i have tried LAN definitions and "the engine" as well but they both freeze, even if i send data thru processing or PD. i have a lot of questions at this time 1.- why processing tells me that i am getting the data from diferent ports, while i'm using 6000? 2.- why in the UDP definition i get no data out, even if it should say something like "waiting fordata/port/etc.." that's defined in the C# capsule 3.- is there a direct way to get midi data (key and CC) to GH i also tried to use firefly to get the data via COM port. i know you can do this trick in processing but i just don't know how. well. if anyone could help me i would share the results here (since it's a magister, results shoud be very interesting) UDP has allways been a unsolved issue on other posts. maybe we could work it out ;) Thanks…; Added by jota aldunce at 8:43am on September 28, 2010

Topic: Angophora tree trunk. Generate 3~5 "random" points around the perimeter of a shape with a minimum distance apart; each point a small, random distance away from original shape's perimeter.: But not just any gum tree. The angophora, no less: Why? Because I like nature, that's why. Every time I see new designs –especially architectural designs– it worries me that the natural environment is being taken over. Not just that, but even the new materials used in all product designs has to come from nature as well [read: mines]. So. People are forgetting that we still need trees and I believe that if someone sees a beautiful [read: established] tree in their architectural plans, they are going to be much more likely to build around it and not cut it down. That alone would no doubt increase the value of the house. My thinking is that current tree models suck. They look unnatural and I think I know why. They're not random or organic enough. They're not detailed enough. That's basically my 'rationale' for this project. Just look at how different all of these tree trunks are! So I am not being paid for this project. It's a personal project of mine. I'm just worried about the trunk shape for now — I'll worry about all the leaves... when I get to that. I am a grasshopper beginner. Please keep that in mind. I am also fairly hopeless at traditional programming, but I find the visual approach of grasshopper much easier to grasp. So unfortunately I have gotten stuck and need some help, even just a clue, as to how to proceed. That said, here is my current progress: About a year ago, I started modelling with straight trunks using pipe sections, to see if I could get a very basic "tree" shape. And to see if I could join the segments together. Yes it works but it looks hopeless as you can imagine. Then I stopped for a long while. Now I'm back at it, hoping to improve a lot more. I have already made one basic vertical nurbs curve with tangents at either end as the main "trunk". I tried creating two ellipses at each end of the main trunk/curve and lofting between them but it omitted the main curve/rail. So it ended up being an elliptical trunk with straight sides which of course still didn't look right. Then I divided the first main curve up into a number of segments. I think that is a better approach. I have taken the parameters of the curve at each segment (probably the tangent, but I am unsure what the exact parameter is) and used that to form a basic angled plane at each segment/division. I have been able to draw ellipses at each segment and rotate them onto the plane. I was going to loft it together later on. A Curved loft with elliptical cross-sections looks much better than straight a pipe does, but still looks too unnatural. I quickly realised that tree trunks are not elliptical, but rather, shaped more like 'kidneys'. The next step was to create >3 points on each of those planes (spaced fairly evenly around the ellipse so as not to create a really funky/unwanted shape). Maybe it would be better to model with a triangle or other polygon instead of an ellipse. I haven't got that far yet... because here is where I am getting stuck. I managed to find a way of getting three roughly 'triangular' points along each that ellipse. I also managed to create three nurbs cuves in the Z direction which intersected those three points, a bit like three seams down the side of the tree trunk, but couldn't figure out how to loft it all together. I think it was the wrong approach anyway... I'd rather try to create a bunch of nurbs curves at each of the XY planes so as to get more control of the shape. What I am trying to do now is create three roughly triangular-spaced points on a basic ellipse through which I can then draw a simple nurbs curve (think like a cross section of the trunk). I would then like to add some XY-only randomness to the positions of those points. Not Z randomness, otherwise the trunk is going to get messed/kinked up. That's probably very important. Then I would like to loft those nurbs curvs at each XY plane together forming the basic tree trunk, which also tapers based on some other variable (a non-linear factor, not simply distance from ground plane, perhaps something else?). I have attached the GH file. I am also open to suggestions if you have a better way of solving a problem. I would like to retain control over a lot of factor such as number of branches, spacing, average branch length, etc. My main contrsaints are that the entire thing has to be somewhat random and non-linear. …; Added by leslie dean brown at 12:13am on December 27, 2016

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Added by Arturo Tedeschi at 4:34am on August 12, 2012

Topic: Ladybug Photovoltaics components released !: nts for Ladybug too. They are based on PVWatts v1 online calculator, supporting crystalline silicon fixed tilt photovoltaics. You can download them from here, or use the Update Ladbybug component instead. If you take the first option, after downloading check if .ghuser files are blocked (right click -> "Properties" and select "Unblock"). You can download the example files from here. Video tutorials will follow in the coming period. In the very essence these components help you answer the question: "How much energy can my roof, building facade, solar parking... generate if I would populate them with PV panels"? They allow definition of different types of losses (snow, age, shading...) which may affect your PV system: And can find its optimal tilt and orientation: Or analyse its performance, energy value, consumption, emissions... By Djordje Spasic and Jason Sensibaugh, with invaluable support of Dr. Frank Vignola, Dr. Jason M. Keith, Paul Gilman, Chris Mackey, Mostapha Sadeghipour Roudsari, Niraj Palsule, Joseph Cunningham and Christopher Weiss. Thank you for reading, and hope you will enjoy using the components! EDIT: From march 27 2017, Ladybug Photovoltaics components support thin-film modules as well. References: 1) System losses: PVWatts v5 Manual, Dobos, NREL, 2014 2) Sun postion equations by Michalsky (1988): SAM Photovoltaic Model Technical Reference, Gilman, NREL, 2014 edited by Jason Sensibaugh 3) Angle of incidence for fixed arrays: PVWatts Version 1 Technical Reference, Dobos, NREL, 2013 4) Plane-of-Array diffuse irradiance by Perez 1990 algorithm: PVPMC Sandia National Laboratories SAM Photovoltaic Model Technical Reference, Gilman, NREL, 2014 5) Sandia PV Array Performance Module Cover: PVWatts Version 1 Technical Reference, Dobos, NREL, 2013 6) Sandia Thermal Model, Module Temperature and Cell Temperature Models: Photovoltaic Array Performance Model, King, Boys, Kratochvill, Sandia National Laboratories, 2004 7) CEC Module Model: Maximum power voltage and Maximum power current from: Exact analytical solutions of the parameters of real solar cells using Lambert W-function, Jain, Kapoor, Solar Energy Materials and Solar Cells, V81 2004, P269–277 8) PVFORM version 3.3 adapted Module and Inverter Models: PVWatts Version 1 Technical Reference, Dobos, NREL, 2013 9) Sunpath diagram shading: Using sun path charts to estimate the effects of shading on PV arrays, Frank Vignola, University of Oregon, 2004 Instruction manual for the Solar Pathfinder, Solar Pathfinder TM, 2008 10) Tilt and orientation factor: Application for Purchased Systems Oregon Department of Energy solmetric.com 11) Photovoltaics performance metrics: Solar PV system performance assessment guideline, Honda, Lechner, Raju, Tolich, Mokri, San Jose state university, 2012 CACHE Modules on Energy in the Curriculum Solar Energy, Keith, Palsule, Mississippi State University Inventory of Carbon & Energy (ICE) Version 2.0, Hammond, Jones, SERT University of Bath, 2011 The Energy Return on Energy Investment (EROI) of Photovoltaics: Methodology and Comparisons with Fossil Fuel Life Cycles, Raugei, Fullana-i-Palmer, Fthenakis, Elsevier Vol 45, Jun 2012 12) Calculating albedo: Metenorm 6 Handbook part II: Theory, Meteotest 2007 13) Magnetic declination: Geomag 0.9.2015, Christopher Weiss…; Added by djordje to Ladybug Tools at 2:04pm on June 15, 2015

Event: Moltitudine - Power of the many _ GH advanced workshop: ne – power of the many è un corso advanced level che studia la produzione di effetti complessi a partire dalla modellazione di comportamenti semplici su un insieme strutturato con un numero alto di elementi. Attraverso un approccio generico e scaleless sarà possibile affrontare la tematica generale su più fronti e in una molteplicità di declinazioni possibili. Il corso è rivolto a chi,indipendentemente dal proprio background (urbanistica, architettura, ingegneria, design, arte o altro) già possiede una esperienza di base con Rhinoceros e Grasshopper, e desidera sviluppare aspetti di gestione avanzata del flusso di articolato di informazioni attraverso una strategia guidata basata su esempi pratici e sull’implementazione di un progetto personale sul tema generale del “field behaviour”. Sarà trattato anche l’utilizzo di alcuni plug-ins quali gHowl e WeaverBird. Il numero dei partecipanti è fissato a un massimo di 20 per offrire un tutoraggio proficuo ed una effettiva esperienza di learning ad ogni iscritto. [.] Temi: teoria . complessità, emergence, effetti di campo (field behaviour), sensibilità, efficienza multiperformance tecnica . dati:gestione e manipolazione avanzata del data tree, streaming e visualizzazione; transizione, blending e modulazione delle geometrie; generazione e controllo multiperformance di popolazioni di componenti; attrattori, drivers e tecniche di modulazione avanzate; uso delle mesh con WeaverBird; ottimizzazione con Galapagos [.] Dettagli : Tutors: Alessio Erioli + Andrea Graziano – Co-de-iT Si richiede esperienza di base nella modellazione in Rhino (equivalente a Rhino training Level 1, il Level 2 è gradito – la documentazione per il training è disponibile gratuitamente all’indirizzo: http://download.rhino3d.com/download.asp?id=Rhino4Training&language=it) e nell’uso di Grasshopper (la suddivisione di una superficie NURBS in componenti tramite isotrim è data come base assodata) . luogo: IreCoop – via Vasco De Gama 27 _ Firenze . durata: 25-27 febbraio 2010 – 3 giornate consecutive _ orario 9:00 – 18:00 . costo: professionisti – 450.00 € studenti – 280.00 € . note: scadenza iscrizioni: 20 febbraio 2010 il corso sarà attivato con un numero minimo di 15 iscritti al termine sarà rilasciato un attestato di frequenza gli iscritti dovrano venire muniti dei propri laptop con software installato. una versione free per 30 giorni è disponibile sul sito www.rhino3d.com . contatti: iscrizioni + info alloggi: www.irecooptoscana.it (Cosa offriamo > formazione > altri corsi) info sul corso: info@co-de-it.com…; Added by Alessio Erioli at 11:22am on February 7, 2011

Comment on: Topic 'Everything you need to know about Display and View Menus in Grasshopper': rst option is the type of Point Grasshopper will display in the Rhino Viewport. Dot Point Cross Dot is a small dot of single colour. Point is a slightly larger dot with a white center. Cross an X-shaped cross. (Default) Preview Plane Size The option to change the size of the Plane appears as a fly out menu where an input box allows you to enter a value in Rhino Document Units to set the size of the Plane. (You must press Enter to accept the change) Preview Mesh Edges The option to hide/show mesh edges catches a few users out, thinking that the Meshing of the Object has failed. And without... There is a handy Shortcut of Ctrl+M to toggle between the two options. Gumballs As of version 0.9.0064, Grasshopper allows the user to move individual points that are Persistent[3a] by means of a Gumball in the Rhino Document. Volatile[3b] points can be made persistent by way of the Internalising feature found on the Context Menu of Components and Parameters [3] Glossary: Volatile - "liable to change rapidly and unpredictably". Referenced objects in Rhino are considered volatile. Persistent - "continuing to exist or endure over a prolonged period". Internalised objects are considered persistent. …; Added by Danny Boyes at 10:46am on June 24, 2014

Comment on: Topic 'Where is scriptcontext DOCUMENTATION/MANUAL/CHM?': ust assume this is really what is being imported with the standard import line I see in all the examples: # scriptcontext moduleimport RhinoPython.Host as __host'''The Active Rhino document (Rhino.RhinoDoc in RhinoCommon) while a scriptis executing. This variable is set by Rhino before the exection of every script.'''doc = None'''Identifies how the script is currently executing1 = running as standard python script2 = running inside grasshopper component3... potential other locations where script could be running'''id = 1'''A dictionary of values that can be reused between execution of scripts'''sticky = dict()def escape_test( throw_exception=True, reset=False ): "Tests to see if the user has pressed the escape key" rc = __host.EscapePressed(reset) if rc and throw_exception: raise Exception('escape key pressed') return rc def errorhandler(): ''' The default error handler called by functions in the rhinoscript package. If you want to have your own predefined function called instead of errorhandler, replace the scriptcontext.errorhandler value ''' return None…; Added by Nik Willmore at 7:47pm on October 10, 2015