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Comment on: Topic '3d printing a GH gyroid': h tubes are redundant so surfaces overlap instead of interpenetrate, so it is not a good system. Cocoon is the best answer these days unless you can get Exowire/Exoskelton to work. If you want more control over shape, feed your uncapped tubes into Cocoon as meta-surfaces and delete any and all of the inner meshes to just keep the outer single closed one, but this is just duplicate-culled lines used as meta-lines: Turn down the CS input to 0.005 for this result, from 0.02 used for faster preview. In fact bake the lines and only test Cocoon on a few of them in order to get the result you want before doing the whole thing. Whole thing at 0.005 cell size takes 5 minutes for Cocoon and 2 minutes for refinement to a smooth and even mesh. Actually, seems like 0.005 is way too fine, giving a 600MB STL file. So, 0.01 cell size at less than a minute total: 159MB STL which is still a bit too big for places like Shapeways. Wow. OK then 0.02 cell size, but I have to increase diameter or my two smoothing steps in refine collapse things too much, an in fact I set it to no smoothing, getting more volume and a reasonable 46MB STL file: Alas, now it's more frail and overly organic rather than mechanical. Increasing diameter just merges it into perforated plates too much. File size is simply an issue with this complexity level, so different 3D printing services will have different file size limits. Exowire/Exoskeleton would work but your original mesh hasn't been MeshMachine remeshed to be regular, so short segments ruin it. Here is just a corner: I think that's why more wires fails, at least. Pretty temperamental component. Switching to MeshMachine is needed, I guess, instead of Cocoon refine, to remesh away so many small triangles along the boring tubes. Crucial for good remeshing was to set Flip to 0 or I failed to get a rough enough mesh. It's an adaptive mesh so I can retain good detail while roughing out the tubes. MeshMachine is terribly slow for this whole thing, like 6 minutes, and blows up for this overly rough setting, 20 steps, so less rough, ugh, I'm out of time. I think free Autocad Meshmixer is the way to make a better smaller mesh, after a refined output from Cocoon. MeshMachine is just too slow to tweak and when it blows up, creating massive triangles jutting out, it hangs too when you change settings. Starting with a Cocoon refined mesh certainly helped Meshmixer. Using triangle budget lets me have full control. Here is 150K triangles instead of 200K: STL file size down to 40MB. I think Shapeways is 70 or 100MB limit? So it can be even finer. Here is the Cocoon output versus the Meshmixer reduction: To use Meshmixer, turn on View > Show Wireframe, Command-S to select all and use Edit > Reduce from the palette that appears. Cocoon can end up making a few inner meshes where things get weird in your uneven original mesh with small holes so fish out the main mesh by adding a List Item node. The best strategy for Cocoon is indeed to make an overly fine STL so you avoid any need to tweak forever in Grasshopper, but then you can achieve a smaller mesh file size while preserving shape instead of things turning all smearly organic in Grasshopper.…; Added by Nik Willmore at 4:08pm on March 14, 2016

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: 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

Event: COLLABORATIONS | The Art and Science of Building Facades: RESENTERS PETER ARBOUR seele KEITH BOSWELL Skidmore Owings & Merrill MARK E. DANNETTEL Thornton Thomasetti LISA IWAMOTO IwamotoScott JASON KELLY JOHNSONFuture Cities Lab/California College of the Arts HAO KO Gensler BILL KREYSLER Kreysler & Associates ANDREW KUDLESS Matsys/California College of the Arts CHRIS LASCH Aranda\Lasch ARNOLD LEE HOK MIC PATTERSON Enclos, Corp. M. MIN RA Front GEOFF ROSSI Element DENNIS SHELDEN Gehry Technologies ANN SMITH Cambridge Architectural MARCELLO SPINAP-A-T-T-E-R-N-S SANJEEV TANKHA Buro Happold BEN TRANEL Gensler PHIL WILLIAMS Webcor Builders & Consulting Group DIGITAL FABRICATION WORKSHOPS 8 LU/HSW or 8 LU credits (depending upon workshop choice) Friday, July 27th 2012 9:00 AM – 6:00 PMCalifornia College of the Arts San Francisco, California PARAMETRIC ENVELOPES WITH GRASSHOPPERANDREW KUDLESS Matsys Design/California College of the Arts COMPOSITE FACADES IN ARCHITECTUREBILL KREYSLER & JOSHUA ZABEL Kreysler & Associates RESPONSIVE BUILDING FACADESJASON KELLY JOHNSON Future Cities Lab/California College of the Arts SCRIPTED FACADESCHRIS LASCH Aranda/Lasch PARAMETRIC FACADE TECTONICSKEVIN MCCLELLAN & ANDREW VRANA Digital Fabrication Alliance BIM MODELING WITH REVIT/INTRO TO VASARIGERMAN APARICIO California College of the Arts & Autodesk Fellow Facade technologies are developing at a more dynamic rate than almost any other issue related to construction today with an impact on performance, sustainability, materials, fabrication, design, delivery and much more. What was once thought impossible is now an everyday reality, and the future promises accelerating change. Presented by Enclos and The Architect’s Newspaper, COLLABORATION will bring together in a two-day event, the industry, the profession, and the academy to explore the evolution and the issues surrounding today’s high tech building envelope through case studies and lectures presented by foremost practitioners, as well as panel discussions, and workshops conducted by leaders in the AEC profession. Aimed at architects, building owners and developers, general contractors, engineers, fabricators, material suppliers, educators, and students, the event’s panels and sessions address the transformative opportunities created by new technologies and resources. From using BIM for communicating effectively with fabricators, to energy modeling, to retrofitting practices and the latest design tools, the COLLABORATION conference offers an unprecedented opportunity to survey the possibilities of designing in the digital age. Who Should Attend Architects, designers, engineers, building owners, developers, and facade consultants interested in gaining increased understanding of cutting-edge building envelope technologies.…; Added by German at 12:53pm on July 5, 2012

Topic: Is it possible to model multi-modifer complex radiance materials in Honeybee ?: _b2 texfunc WoodGrain_tex 6 xgrain_dx ygrain_dx zgrain_dx woodtex.cal -s 0.01 0 1 0.075 WoodGrain_tex plastic WoodGrain_NonColor2 0 0 5 0.364 0.187 0.072 0.006 0.0 This creates the texture (on the table) below: Is it possible for me to use a multi-modifier material like this in Honeybee ? Thanks, Sarith (Update: I figured out a hack to do this in MSH2RAD but I still don't know if it is possible to add this to the Honeybee Library).…; Added by Sarith Subramaniam to Ladybug Tools at 1:42pm on January 6, 2016

Comment on: Topic 'High Performance Laptop': a machine that is light and very sturdy. I have taken my Macbook Pro all around the world, carry it with me every day, even dropped it a few times and its still totally fine. Its thin and light. 2) You get some actual support for your hardware even a few years down the line. My Macbook Pro is from 2012 and I can still walk in to any Apple Store and get help with it, which I have done many, many times in different places around the world - I never had to show a receipt or was charged any money for help. There is no PC/Laptop manufacturer in the world with anything close to that, because companies like Asus, Dell, etc. bring out dozens of new versions of laptops every year, so its much harder to service them after a few years. 3) This is the most important one, which usually people forget when they say that Macbooks are overpriced: Resale Value. If you have ever tried to sell an old PC/Laptop (I have a few times), you will know how little value they have even after just 2-3 years. Macbooks retain their value very well and even after 4 years you can still get 50% of your original price. 4) Of course you can install Windows on it and it runs perfectly. I have MacOS and Windows on it and both run absolutely fine. On the Windows side I have Rhino+GH, Maya and a few others. Having Windows is good, because some software still only runs on Windows (looking at you, 3DSMax!). Most other software also runs on MacOS. In the interest of sanity it is great to have an alternative to Windows for all the day to day stuff, like Mail, Calender, Photos, Presentations, etc. that just always works. 5) As for performance: Yes, Macbook Pros dont necessarily have the latest and greatest in graphics cards (the rest is on par with PC laptops), but unless you want to play games you will not need it. VRay RT can do GPU rendering, but you wont get great performance from a Notebook GPU anyways and it doesnt make sense to do rendering on a laptop (especially since you have a workstation). You could get one of the older Macbook Pro Retina Late 2013 or Mid 2014 models with the GTX750M by Nvidia, which will be usable to render using VRay RT, but of course not huge performance. Better to invest in a good used graphics card for your workstation like an Nvdia GTX980ti, which is the best value for money for GPU rendering right now (lots of used ones available). So at least consider also getting a Macbook Pro. You can buy refurbished models (depending where you are) and they are like new, but a lot cheaper or even get an older one thats used. It will be a worthwile investment. Take it from someone who has used dozens of PCs and Macs in my lifetime and have to do the IT support here at work (where we also use both). I still have my Macbook Pro Retina from 2012 and its still running perfectly, super fast, and I can use Rhino and GH for huge files, do GPU Rendering with Octane Render and all sorts of other heavy computing stuff. Hope that helps.…; Added by Armin Seltz at 11:12am on September 19, 2016

Topic: Cordyceps: he Cordyceps. Maybe some of you find this helpful/useful. So basically, the Cordyceps is a physical module with 4 knobs and 1 slider. The knobs give an output between 1 and 1000, while the physical slider outputs 0-359. And of course, for this physical module I wrote a plugin to communicate with it. The knobs are intended to be the variables that modifies the design, while the physical slider is intended to be connected to the camera component. Here I will put up "the recipe" for all to make their own module. You will be able to download the plugin as well. Please send me a message if you want the 3D-files for the knobs, the box and slider knob. They've been made to directly 3D-print. Plugin: https://github.com/zakadjeb/Cordyceps/blob/master/Cordyceps/Cordyce... Code for Arduino IDE: https://github.com/zakadjeb/Cordyceps/blob/master/Arduino/_Arduino_... What you need: 1x - Arduino (Leonardo, UNO or whatever) 4x - Potentiometers 1x - Sliding potentiometer 1x - Breadboard Bundle of jump wires. 1. So, a potentiometer is a variable resistor, which is basically a component that changes the resistance between the voltage and the ground. If A is supplied with 5V then B must be connected to Ground. The W will give "read" the resistance, and thus should be placed in Analog input (A0-A5) on the Arduino. The slider potentiometer works the same way. 2. Now connect the 4 pots to each their Analog input. The slider is supposed to be in A4. So to make sure: A0: Knob1 A1: Knob2 A2: Knob3 A3: Knob4 A4: Slider 3. Now it's time to connect the voltage! Using the breadboard, the voltage can be sent through 1 line, the Ground as well. It should be quite easy to connect them. 4. Now, download the Arduino IDE and copy-paste the code I supplied above. In the IDE, you need to let it know which Arduino you're working with, and which port is should send the script. 5. Almost there. Download the plugin. Open the port you're using through the plugin. Set Start to True and the Cordyceps should be within you. This recipe will be updated! Let me know if there are any issues. // Zakaria Djebbara…; Added by Zakaria Djebbara at 2:17am on January 10, 2017

Topic: Cordyceps: he Cordyceps. Maybe some of you find this helpful/useful. So basically, the Cordyceps is a physical module with 4 knobs and 1 slider. The knobs give an output between 1 and 1000, while the physical slider outputs 0-359. And of course, for this physical module I wrote a plugin to communicate with it. The knobs are intended to be the variables that modifies the design, while the physical slider is intended to be connected to the camera component. Here I will put up "the recipe" for all to make their own module. You will be able to download the plugin as well. Please send me a message if you want the 3D-files for the knobs, the box and slider knob. They've been made to directly 3D-print. Plugin: https://github.com/zakadjeb/Cordyceps/blob/master/Cordyceps/Cordyce... Code for Arduino IDE: https://github.com/zakadjeb/Cordyceps/blob/master/Arduino/_Arduino_... What you need: 1x - Arduino (Leonardo, UNO or whatever) 4x - Potentiometers 1x - Sliding potentiometer 1x - Breadboard Bundle of jump wires. 1. So, a potentiometer is a variable resistor, which is basically a component that changes the resistance between the voltage and the ground. If A is supplied with 5V then B must be connected to Ground. The W will give "read" the resistance, and thus should be placed in Analog input (A0-A5) on the Arduino. The slider potentiometer works the same way. 2. Now connect the 4 pots to each their Analog input. The slider is supposed to be in A4. So to make sure: A0: Knob1 A1: Knob2 A2: Knob3 A3: Knob4 A4: Slider 3. Now it's time to connect the voltage! Using the breadboard, the voltage can be sent through 1 line, the Ground as well. It should be quite easy to connect them. 4. Now, download the Arduino IDE and copy-paste the code I supplied above. In the IDE, you need to let it know which Arduino you're working with, and which port is should send the script. 5. Almost there. Download the plugin. Open the port you're using through the plugin. Set Start to True and the Cordyceps should be within you. This recipe will be updated! Let me know if there are any issues. // Zakaria Djebbara…; Added by Zakaria Djebbara to Cordyceps at 5:44am on January 10, 2017

Comment on: Topic 'blend surface / curve network / fillet': I wanted to use it for a client, really I can't since they will freak out about a weird version of Rhino being needed. http://discourse.mcneel.com/t/scripting-blendsrf/24635 http://mcneel.myjetbrains.com/youtrack/issue/RH-29978 What you call trivial is the core of your business, the core of your product, meaning Grasshopper user ability to access serious commands or not. This is, after all, one of the most important commands in the entire Rhino universe. Without it, I have to just completely abandon NURBS and edit meshes since I can't join surfaces smoothly so I have to stop using fragments at all and only meshes afford local detail well compared to single NURBS surfaces. Only polysurfaces can mix in little high UV count blends to deal with tight local detail. I guess I'll switch to the WIP now. Test that, and just tell clients, hey, that's life. It's not exactly easy to find the WIP download, being a hidden "Serengeti" topic on the main Rhino forum, but I can offer the membership link. http://discourse.mcneel.com/t/how-do-i-actually-download-serengeti/23846 http://www.rhino3d.com/download/rhino/wip I had to manually install IronPython 2.7.5 too, to fix a broken Python system: http://ironpython.codeplex.com/releases/view/169382 Now, where on Earth do I find the Rhinocommon manual for Rhino 6 WIP? I guess it's within the main Rhino EditPythonScript editor, though that can't be searched like a normal manual: CreateBlendSurface(face0: BrepFace, edge0: BrepEdge, domain0: Interval, rev0: bool, continuity0: BlendContinuity, face1: BrepFace, edge1: BrepEdge, domain1: Interval, rev1: bool, continuity1: BlendContinuity) -> Array[Brep] Makes a surface blend between two surface edges. face0: First face to blend from. edge0: First edge to blend from. domain0: The domain of edge0 to use. rev0: If false, edge0 will be used in its natural direction. If true, edge0 will be used in the reversed direction. continuity0: Continuity for the blend at the start. face1: Second face to blend from. edge1: Second edge to blend from. domain1: The domain of edge1 to use. rev1: If false, edge1 will be used in its natural direction. If true, edge1 will be used in the reversed direction. continuity1: Continuity for the blend at the start. Returns: Array of Breps if successful. Now I have normal, productive homework, of figuring out how to specify edges from a Python script. I'll just sell this extra special capability of Rhino 5 WIP from Grasshopper as a cutting edge advanced new feature other lowly consultants can't match, assuming I can get it to work first. The initial strategy is to Grasshopper create discrete surfaces, blow holes in a parent surface, scale down and move the little surfaces away, and just blend everything together into a polysurface. Then a client won't freak out so badly when I show them how to use meshes instead, since at least there's an alternative straight from NURBS, that maybe isn't as creatively open ended, but will get them out of a bind if their own client freaks out about meshes converted to NURBS via ZBrush ZRemesher run through T-Splines to get a smooth NURBS polysurface surface that looks like odd patchwork. Alas, the above Rhinocommon blurb is incomplete, lacking info about what values for continuity are defined as, such as position, tangency, or curvature. I guess I'll just use try numbers. …; Added by Nik Willmore at 1:55pm on March 27, 2016

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