algorithmic modeling for Rhino

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Topic: NEW RELEASE OF LADYBUG AND HONEYBEE!: ion of both Ladybug and Honeybee. Notable among the new components are 51 new Honeybee components for setting up and running energy simulations and 15 new Ladybug components for running detailed comfort analyses. We are also happy to announce the start of comprehensive tutorial series on how to use the components and the first one on getting started with Ladybug can be found here: https://www.youtube.com/playlist?list=PLruLh1AdY-Sj_XGz3kzHUoWmpWDXNep1O A second one on how to use the new Ladybug comfort components can be found here: https://www.youtube.com/playlist?list=PLruLh1AdY-Sho45_D4BV1HKcIz7oVmZ8v Here is a short list highlighting some of the capabilities of this current Honeybee release: 1) Run EnergyPlus and OpenStudio Simulations - A couple of components to export your HBZones into IDF or OSM files and run energy simulations right from the grasshopper window! Also included are several components for adjusting the parameters of the simulations and requesting a wide range of possible outputs. 2) Assign EnergyPlus Constructions - A set of components that allow you to assign constructions from the OpenStudio library to your Honeybee objects. This also includes components for searching through the OpenStudio construction/material library and components to create your own constructions and materials. 3) Assign EnergyPlus Schedules and Loads - A set of components for assigning schedules and Loads from the Openstudio library to your Honeybee zones. This includes the ability to auto-assign these based on your program or to tweak individual values. You can even create your own schedules from a stream of 8760 values with the new “Create CSV Schedule” component. Lastly, there is a component for converting any E+ schedule to 8760 values, which you can then visualize with the standard Ladybug components 4) Assign HVAC Systems - A set of components for assigning some basic ASHRAE HVAC systems that can be run with the Export to OpenStudio component. You can even adjust the parameters of these systems right in Grasshopper. Note: The ASHRAE systems are only available for OpenStudio and can’t be used with Honeybee’s EnergyPlus component. Also, only ideal air, VAV and PTHP systems are currently available but more will be on their way soon! 5) Import And Visualize EnergyPlus Results - A set of components to import numerical EnergyPlus simulation results back into grasshopper such that they can be visualized with any of the standard Ladybug components (ie. the 3D chart or Psychrometric chart). Importers are made for zone-level results as well as surface results and surfaces results can be easily separated based on surface type. This also means that E+ results can be analyzed with the new Ladybug comfort calculator components and used in shade or natural ventilation studies. Lastly, there are a set of components for coloring zone/surface geometry with EnergyPlus results and for coloring the shades around zones with shade desirability. 6) Increased Radiance and Daysim Capabilities - Several updates have also been made to the existing Radiance and Daysim components including parallel Radiance Image-based analysis. 7) Visualize HBObject Attributes - A few components have been added to assist with setting up honeybee objects and ensuing the the correct properties have been assigned. These include components to separate surfaces based on boundary condition and components to label surfaces and zones with virtually any of their EnergyPlus or Radiance attributes. 8) WIP Grizzly Bear gbxml Exporter - Lastly, the release includes an WIP version of the Grizzly Bear gbXML exporter, which will continue to be developed over the next few months. And here’s a list of the new Ladybug capabilities: 1) Comfort Models - Three comfort models that have been translated to python for your use in GH: PMV, Adaptive, and Outdoor (UTCI). Each of these models has a “Comfort Calculator” component for which you can input parameters like temperature and wind speed to get out comfort metrics. These can be used in conjunction with EPW data or EnergyPlus results to calculate comfort for every hour of the year. 2) Ladybug Psychrometric Chart - A new interactive psychrometric chart that was made possible thanks to the releasing of the Berkely Center for the Built Environment Comfort Tool Code (https://github.com/CenterForTheBuiltEnvironment/comfort-tool). The new psychrometric chart allows you to move the comfort polygon around based on PMV comfort metrics, plot EPW or EnergyPlus results on the psych chart, and see how many hours are made comfortable in each case. The component also allows you to plot polygons representing passive building strategies (like internal heat gain or evaporative cooling), which will adjust dynamically with the comfort polygon and are based on the strategies included in Climate Consultant. 3) Solar Adjusted MRT and Outdoor Shade Evaluator - A component has been added to allow you to account for shortwave solar radiation in comfort studies by adjusting Mean Radiant Temperature. This adjusted MRT can then be factored into outdoor comfort studies and used with an new Ladybug Comfort Shade Benefit Evaluator to design outdoor shades and awnings. 4) Wind Speed - Two new components for visualizing wind profile curves and calculating wind speed at particular heights. These allow users to translate EPW wind speed from the meteorological station to the terrain type and height above ground for their site. They will also help inform the CFD simulations that will be coming in later releases. 5) Sky Color Visualizer - A component has been added that allows you to visualize a clear sky for any hour of the year in order to get a sense of the sky qualities and understand light conditions in periods before or after sunset. Ready to Start? Here is what you will need to do: Download Honeybee and Ladybug from the same link here. Make sure that you remove any old version of Ladybug and Honeybee if you have one, as mentioned on the Ladybug group page. You will also need to install RADIANCE, DAYSIM and ENERGYPLUS on your system. We already sent a video about how to get RADIANCE and Daysim installed (link). You can download EnergyPlus 8.1 for Windows from the DOE website (http://apps1.eere.energy.gov/buildings/energyplus/?utm_source=EnergyPlus&utm_medium=redirect&utm_campaign=EnergyPlus%2Bredirect%2B1). “EnergyPlus is a whole building energy simulation program that engineers, architects, and researchers use to model energy and water use in buildings.” “OpenStudio is a cross-platform (Windows, Mac, and Linux) collection of software tools to support whole building energy modeling using EnergyPlus and advanced daylight analysis using Radiance.” Make sure that you install ENERGYPLUS in a folder with no spaces in the file path (e.g. “C:\Program Files” has a space between “Program” and “Files”). A good option for each is C:\EnergyPlusV8-1-0, which is usually the default locations when you run the downloaded installer. New Example Files! We have put together a large number of new updated example files and you should use these to get yourself started. You can download them from the link on the group page. New Developers: Since the last release, we have had several new members join the Ladybug + Honeybee developer team: Chien Si Harriman - Chien Si has contributed a large amount of code and new components in the OpenStudio workflow including components to add ASHRAE HVAC systems into your energy models and adjust their parameters. He is also the author of the Grizzly Bear gbxml exporter and will be continuing work on this in the following months. Trygve Wastvedt - Trygve has contributed a core set of functions that were used to make the new Ladybug Colored Sky Visualizer and have also helped sync the Ladybug Sunpath to give sun positions for the current year of 2014 Abraham Yezioro - Abraham has contributed an awesome new bioclimatic chart for comfort analyses, which, despite its presence in the WIP tab, is nearly complete! Djordje Spasic - Djordje has contributed a number of core functions that were used to make the new Ladybug Wind Speed Calculator and Wind Profile Visualizer components and will be assisting with workflows to process CFD results in the future. He also has some more outdoor comfort metrics in the works. Andrew Heumann - Andrew contributed an endlessly useful list item selector, which can adjust based on the input list, and has multiple applications throughout Ladybug and Honeybee. One of the best is for selecting zone-level programs after selecting an overall building program. Alex Jacobson - Alex also assisted with the coding of the wind speed components. And, as always, a special thanks goes to all of our awesome users who tested the new components through their several iterations. Special thanks goes to Daniel, Michal, Francisco, and Agus for their continuous support. Thanks again for all the support, great suggestions and comments. We really cannot thank you enough. Enjoy!, Ladybug + Honeybee Development Team PS: If you want to be updated about the news about Ladybug and Honeybee like Ladybug’s Facebook page (https://www.facebook.com/LadyBugforGrasshopper) or follow ladybug’s twitter account (@ladybug_tool). …; Added by Chris Mackey to Ladybug Tools at 11:49pm on September 14, 2014

Comment on: Topic 'anyone can help me to create Dimension in grasshopper?': me of the dimensions that changed ( become Diagonal after they were Vertical or Horizontal) I sometime use Record History in rhino for saving time, but when I change some points of curves or trim curves , I have problems with dimensions (see the two pictures below). Problem 2 : After trimming , only two dimensions should be changed depending on their place in changed curves . But what happens is that all the dimensions become crazy!!!!!! I always use Aligned dimension in rhino. Now I know that dimensionsdo not exist in grasshopper. So I ask you if we have expertise in BV , C#, can we create a script for dimensions or is it impossible ?? If we can , I only need Aligned dimension. I hope that I find or create a script that can define all points: start and end of curve ribs and create dimensions from grasshopper to rhino directly with or without the ability to change automatically . Thank you …; Added by anas at 2:42pm on January 8, 2011

Comment on: Topic 'MESH TRIM / MESH SPLIT': mesh by an infinite plane Namespace: Rhino.GeometryAssembly: RhinoCommon (in RhinoCommon.dll) Version: 5.0.15006.0 (5.0.20693.0) Syntax C# public Mesh[] Split( Plane plane ) Visual Basic Public Function Split ( _ plane As Plane _ ) As Mesh() Parameters plane Type: Rhino.Geometry..::..Plane[Missing <param name="plane"/> documentation for "M:Rhino.Geometry.Mesh.Split(Rhino.Geometry.Plane)"] Return Value [Missing <returns> documentation for "M:Rhino.Geometry.Mesh.Split(Rhino.Geometry.Plane)"] See Also Mesh Class Rhino.Geometry Namespace Last updated 3 June 2011 - Robert McNeel and Associates Send comments on this topic to steve@mcneel.com Report wishes and bugs: https://github.com/mcneel/rhinocommon/issues Is this the function? I have a VB component with this: a = rhino.Geometry.Mesh.CreateBooleanSplit(x, y) but this is a boolean split, so I have only one mesh, with the intersection. I would like to have several splitted meshes. Thank you in advance again. …; Added by jose salinas at 2:19am on June 24, 2011

Comment on: Topic 'contour possible bug': y anyway ;)) Since 2014 i begun to get back into the construction biz for some dozen main reasons, one of them being the highly increased availability of this kind of software "power", and robotics. first project ended by 1stQ 2015 was focused on the development of a parametric block for construction. (almost sure the first parametric product designed in Uruguay, and probably one of the few first of this kind globally...) Far from being a complicated model. In fact the standard model is extremely simple, key thing is that is fully parametric... dimensions, materials, textures, colors... and so on second key thing is that the main common component of the blocks (an EPS core) is robotically machined... the blocks are the base of a construction system (oriented mainly - though not restricted only - to residential buildings) that - is based on digital models, tendentially to be used in parametric models of buidings - lab tested to prove to be 1.5 times as compression resistant than traditional bricks and blocks. (autoportability up to two stories buildings) - has recently proved (due to size) to be 300% more efficient than the classic and 200% more efficient than steel frame in (our country official figures) check it out here -- https://drive.google.com/file/d/0B1TRxxgF_sEnQnZrTkZGbUx3cmM/view -- - and it's aimed to be mass produced and handled by robots... this project ended on 1H 2016 and i filed 4 patents in the process. 3 of them of mechanical devices designed as extensions for a cnc machine i own and the fourth ( the patent related specifically with the blocks ) included a dozen of innovations (believe me...i have almost 15 yrs in the biz, and are coool stuff...) along the project I've been working with inventor, even knowing in advance it will lack the kind of features I wanted to program many things... (lisp, VB, etc.... all same species of -prehistoric - animals) to leverage the tool to the sky - and far beyond... - but was an alternative valid by that time because it allows the implementation of some form of parametric models, had a local representative and some supposedly skilled guys in the neibourhood.... but life is hard... and none of the latter two rendered me any significant help so I had to take the tour myself... - mind i never regret to do things that others cant - and finish what i start this one was a great project for many figures... and ended with more results than the ones commited to accomplish... ... some more history here .... then because of a customer who brought a ZHA project ! to quote..., I crossed with rhino, and then met GH again to notice to my great joy and pleasure, in what kind of animal it had developed... since money talks I'm investing hard on getting up to the expectations, and beyond as i usually do... and thats how we met.. 2017-2018 it's the time frame to build two robots. first one is a prototype to handle the k-nano blocks in the production process, delivery AND at the construction site ( a "smart crane" we nicknamed...) the other one is the first prototype of robot to assist in the fabrication (smart blocker we called it to be creative ! ;)) then by 2018-2019 i'll be making a "kinda contour crafter" machine to complete the pie :) (you'll be interested on this..) i guess you already know what all this has to do with GH... i already have all the components i can imagine to do almost all i ever wanted to do in relation to this set of projects but in almost a single tool !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! i can design, animate, render, optimize, simulate and even robotic simulate.. so, i have to ask... is there a chance you might be interested in helping us in some projects we are starting on march and june 2017 (8 and no more than 18 months of duration respectively) ? sent you a friend request, for the case you might be interested to continue by e-mail... in any case many thanks for your help and inspiration ! best regards ! long happy marriage, and large figures bank account ! …; Added by franco ferreiro at 1:05pm on February 22, 2017

Topic: TetRhino - a wrapper for Tetgen: rtitions." (http://wias-berlin.de/software/index.jsp?id=TetGen&lang=1) To continue with my wrapping career, TetRhino (or Tetrino) is a .NET wrapper for the well-known and pretty amazing TetGen mesh tetrahedralization program. It provides one new GH component for discretizing or remeshing objects using TetGen. Basic tetrahedralization functionality is exposed with a few different output types that can be controlled. At the moment, the only control for tetrahedra sizes is the minimum ratio, which is controlled by a slider. This is hardcoded to always be above 1.0-1.1, as it is very easy to generate a LOT of data (and crash)... The libs are divided again into different modules to allow flexibility and fun with or without Rhino and GH, so have fun. All 4 libs should be placed in a folder (maybe called 'tetgen') in your GH libraries folder. Remember to unblock. Once again, the libs are provided as-is, with no guarantee of support for now, as I use them internally and do not intend to develop this into a shiny, polished plug-in. If there is enough interest, I can tidy up the code-base and upload it somewhere if someone more savvy than me wants to play. TetgenGH.gha - Grasshopper assembly which adds the 'Tetrahedralize' component to Mesh -> Triangulation. TetgenRC.dll - RhinoCommon interface to the Tetgen wrapper. TetgenSharp.dll - dotNET wrapper for Tetgen. TetgenWrapper.dll - Actual wrapper for Tetgen. Obviously, credit where credit is due for this excellent and tiny piece of software: "The development of TetGen is executed at the Weierstrass Institute for Applied Analysis and Stochastics in the research group of Numerical Mathematics and Scientific Computing." See http://wias-berlin.de/software/index.jsp?id=TetGen&lang=1 for more details about TetGen. To wrap up, some notes about the inputs: These are the possible integer Flags (F) values and resultant outputs for the GH component: 0 - Output M yields a closed boundary mesh. Useful for simply remeshing your input mesh. 1 - Output M yields a list of tetra meshes. 2 - Output I yields a DataTree of tetra indices, grouped in lists of 4. Output P yields a list of points to which the tetra indices correspond. 3 - Output I yields a DataTree of edge indices, grouped in lists of 2. Output P yields a list of points to which the edge indices correspond. Useful for lots of things, very easy to create lines from this to plug into K2 or something for some ropey FEA (or not so ropey!) ;) As this component can potentially create a LOT of data, especially with dense meshes, care should be taken with the MinRatio (R) input. This will try to constrain the tetra to be more or less elongated, which also means that the lower this value gets, the more tetra need to be added to satisfy this constraint. Start with very high values and lower them until satisfactory. Hopefully shouldn't be an issue, but it's possible that you need the 2015 Microsoft C++ Redistributable. Happy tetrahedralizing... UPDATE: The tetgen.zip has been updated with some fixes. UPDATE2: This is now available on Food4Rhino: http://www.food4rhino.com/app/tetrino …; Added by Tom Svilans at 1:27am on October 24, 2017

Comment on: Topic 'Start of an angle': curve or locus] of a segment AB, in English. The set of all the points from which a segment, AB, is seen under a fixed given angle. When you construct l'arc capable —by using compass— you obviously need to find the centre of this arc. This can be easily done in GH in many ways by using some trigonometry (e.g. see previous —great— solutions). Whole circles instead of arcs provide supplementary isoptics —β-isoptic and (180º-β)-isoptic—. Coherent normals let you work in any plane. Or you could just construct β-isoptics of AB by using tangent at A (or B). I mean [Arc SED] component. If you want the true β-isoptic —the set of all the points— you should use {+β, -β} degrees (2 sides; 2 solutions; 2 arcs), but slider in [-180, +180] degrees provides full range of signed solutions. Orthoptic is provided by ±90º. Notice that ±180º isoptic is just AB segment itself, and 0º isoptic should be the segment outside AB —(-∞, A] U [B, +∞)—. [Radians] component is avoidable. More compact versions can be achieved by using [F3] component. You can choose among different expressions the one you like the most as long as performs counter clockwise rotation of vector AB, by 180-β degrees, around A; or equivalent. [Panel] is totally avoidable. Solutions in XY plane —projection; z = 0—, no matter A or B, are easy too. Just be sure about the curve you want to find the intersection with —Curve; your wall— being contained in XY plane. A few self-explanatory examples showing features. 1 & 5 1st ver. (Supplementary isoptics) (ArcCapableTrigNormals_def_Bel.png) 2 & 6 2nd ver. (SED) (ArcCapableSED_def_Bel.png) 3 & 7 3rd ver. (SED + F3) (ArcCapableSEDF3_def_Bel.png) 4 & 8 4th ver. (SED + F3, Projection) (ArcCapableSEDProjInt_def_Bel.png) If you want to be compact, 7 could be your best choice. If you prefer orientation robustness, 5. Etcetera. I hope these versions will help you to compact/visualize; let me know any feedback. Calculate where 2 points [A & B] meet at a specific angle is just find the geometrical locus called arco capaz in Spanish, arc capable in French (l'isoptique d'un segment de droite) or isoptic [curve or locus] of a segment AB, in English. The set of all the points from which a segment, AB, is seen under a fixed given angle.…; Added by Beltrán Fernández Mariño at 11:03pm on July 24, 2011

Blog Post: Workshop FormFinding Strategies MILANO - ITALIA

only compression vault arturo tedeschi

FORM FINDING STRATEGIES WORKSHOP…

Added by Arturo Tedeschi at 3:55am on November 12, 2015

Topic: Reciprocal structures - example definition: ndard length elements without any cutting, and using only simple connections, such as cable ties or scaffold swivel couplers. To summarize the approach I present here: Design an initial shape Remesh this form so that the edges are all roughly the length of the tubes we will use to build the structure Rotate and extend the edges of this mesh to create the crossings Apply a relaxation to optimize the positions of the tubes for tangency demo_reciprocal_structures.gh Initial form In this example I show how to apply this system to a simple sphere. You can replace this with any arbitrary shape. It can be open or closed, and have any topology. Remeshing The new ReMesher component takes an input mesh, and a target edge length, and iteratively flips/splits/collapses edges in order to achieve a triangulated mesh of roughly equal edge lengths. Press the Reset button to initialize, then hold down the F5 key on your keyboard to run several iterations until it has stabilized. (F5 just recomputes the solution, and this can be a quick alternative to using a timer) Once the remeshing is complete, bake the result into Rhino and reference it into the next part of the definition (I recommend doing this rather than connecting it directly, so that you don't accidentally alter the mesh and recompute everything downstream later). Alternatively you can create your mesh manually, or using other techniques. Rotate and Extend We generate the crossings using an approach similar to that described by Tomohiro Tachi for tensegrity structures here: http://www.tsg.ne.jp/TT/cg/FreeformTensegrityTachiAAG2012.pdf Using the 'Reciprocal' component found in the Kangaroo mesh tab, each edge is rotated about an axis through its midpoint and normal to the surface, then extended slightly so that they cross over. By changing the angle you can change whether the fans are triangular or hexagonal, and clockwise or counter-clockwise. Choose values for the angle and scaling so that the lines extend beyond where they cross, but not so far that they clash with the other edges. Note that each rod has 4 crossings with its surrounding rods. There are multiple possibilities for the over/under pattern at each 'fan', and which one is used affects the curvature: A nice effect of creating the pre-optimization geometry by rotating and extending mesh edges in this way is that the correct over/under pattern for each fan gets generated automatically. Optimization for tangency We now have an approximate reciprocal structure, where the lines are the centrelines of our rods, but the distances between them where they cross vary, so we would not actually be able to easily connect the rods in this configuration. To attach the rods to form a structure, we want them to be tangent to one another. A pair of cylinders is tangent if the shortest line between their centrelines is equal to the sum of their radii: Achieving tangency between all crossed rods in the structure is a tricky problem - if we move any one pair of rods to be tangent, we usually break the tangency between other pairs, and because there are many closed loops, we cannot simply start with one and solve them in order. Therefore we use a dynamic relaxation approach, where forces are used to solve all the tangency constraints simultaneously, and over a number of iterations it converges to a solution where they are all met. The latest Kangaroo includes a line-line force, which can be used to pull and push pairs of lines so that they are a certain distance apart. Each rod is treated as a rigid body, so forces applied along its length will cause it to move and rotate. The reciprocal component uses Plankton to find the indices of which lines in the list cross, which are then fed into the force for Kangaroo. We also use springs to keep each line the same length. If the input is good, when we run the relaxation (by double clicking Kangaroo and pressing play), the rods should move only a little. We can see whether tangency has been achieved by looking at the shortest distance between the centerlines of the crossing rods. When this is twice the rod radius, they are tangent. Wait for it to solve to the desired degree of accuracy (there's no need to wait for 1000ths of a millimeter), and then press pause on the Kangaroo controller and bake the result. The radius you choose for the pipes, curvature of the form and length of the edges all affect the result, and at this stage you may need to tweak these input values to get a final result you are happy with. If you find the rods are not reaching a stable solution but are sliding completely off each other, you might want to try adding weak AnchorSprings to the endpoints of the lines, to keep them from drifting too far from their original positions. For previewing the geometry during relaxation I have used the handy Mesh Pipe component from Mateusz Zwierzycki, as it is much faster than using actual surface pipes. To actually build this, you then need to extract the distances along each rod at which the crossings occur, and whether it crosses over or under, mark the rods accordingly, and assemble (If there is interest I will also clean up and post the definition for extracting this information). While this technique doesn't require much equipment, it does need good coordination and numbering! There is also a ReciprocalStructure user object component that can be found in the Kangaroo utilities tab, which attempts to apply steps 3 and 4 automatically. However, by using the full definition you have more control and possibility to troubleshoot if any part isn't working. The approach described here was first tested and refined at the 2013 Salerno Structural Geometry workshop, lead by Gennaro Senatore and myself, where we built a small pavilion using this technique with PVC tubes and cable ties. Big thanks to all the participants! Finally - this is all very experimental work, and there are still many unanswered questions, and a lot of scope for further development of such structures. I think in particular - which of the relative degrees of freedom between pairs of rods are constrained by the connection (sliding along their length, bending, and twisting) and how this affects the structural behaviour would be interesting to examine further. Steps 3 and 4 of the approach presented above would also work with quad meshes, which would have different stability characteristics. There is also the issue of deformation of the rods - as the procedure described here solves only the geometric question of how to make perfectly rigid straight cylinders tangent. The approach could potentially be extended to adjust for, or make use of the flexibility of the rods. I hope this is useful to somebody. Please let me know if you do have a go at building something using this. Any further discussion on these topics is welcome! Further reading on reciprocal structures: http://vbn.aau.dk/files/65339229/Three_dimensional_Reciprocal_Structures_Morphology_Concepts_Generative_Rules.pdf http://www3.ntu.edu.sg/home/cwfu/papers/recipframe/ http://albertopugnale.wordpress.com/2013/04/05/form-finding-of-reciprocal-structures-with-grasshopper-and-galapagos/ …; Added by Daniel Piker to Kangaroo at 12:48pm on January 22, 2014

Blog Post: call for chapter _ DWD 2018 _ Digital Wood Design: The editorial proposal we intend to undertake concerns the digital representation strategies that can change the future of wooden architectures, by combining…; Added by marco filippucci at 7:07am on December 8, 2017