Update Baked Objs by C#

Link: update-bake


1.
Guid uuid = Guid.Empty;
uuid = doc.Objects.AddSurface(obj as Surface, att);

2.
Rhino.DocObjects.ObjRef RefObj = new Rhino.DocObjects.ObjRef(uuid);
doc.Objects.Replace(RefObj, srf);

SpaceMorph - Deformation Utility from Rhino SDK/RhinoCommon

Tutorial: link

To make a component that applies a deformation to geometry, try Rhino.Geometry.SpaceMorph with MorphVector. Yet, without using Morphvector, Rhino will just morph two nearby points and thus approximate the vector deformation.

String Format for Double

Tutorial Link: Local Project: http://www.csharp-examples.net/string-format-double/


Digits after decimal point
This example formats double to string with fixed number of decimal places. For two decimal places use pattern „0.00“. If a float number has less decimal places, the rest digits on the right will be zeroes. If it has more decimal places, the number will be rounded.

Next example formats double to string with floating number of decimal places. E.g. for maximal two decimal places use pattern „0.##“.

Digits before decimal point
If you want a float number to have any minimal number of digits before decimal point use N-times zero before decimal point. E.g. pattern „00.0“ formats a float number to string with at least two digits before decimal point and one digit after that.

Align numbers with spaces
To align float number to the right use comma „,“ option before the colon. Type comma followed by a number of spaces, e.g. „0,10:0.0“ (this can be used only in String.Format method, not in double.ToString method). To align numbers to the left use negative number of spaces.

Create an automated screenshot

Original Link: http://www.grasshopper3d.com/forum/topics/having-grasshopper-create-an

Rectangle bounds = Screen.GetBounds(System.Drawing.Point.Empty);
using(Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height))

{

    using(Graphics g = Graphics.FromImage((Image) bitmap))

    {

        g.CopyFromScreen(System.Drawing.Point.Empty, System.Drawing.Point.Empty, bounds.Size);

    }

    bitmap.Save(@"C:\SomePath\SomeFilename.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);

}

DataTree in C#

How to create a DataTree in C# using Grasshopper:

DataTree Tree = new DataTree();

for (int i = 0; i <= y; i++){

    // Adding data to a DataTree requires a path.

    // In this case the path will have a single branch index.

    // There will be only one Point associated with each path

    Point3d pt = new Point3d(i, 0, 0);

    EH_Path Path = new EH_Path(i);

    Tree.Add(pt, Path);

}

PQ Mesh

Reference from EAT-A-BUG:
http://eat-a-bug.blogspot.com/2010/09/planar-quad-mesh-design.html
http://eat-a-bug.blogspot.com/2010/09/planar-quad-mesh-design-pt-2.html


This is a exercise to create a Tool to generate a quad-dorminate mesh with only planar faces only--PQ Mesh, which was first presented in this paper.

Create a NURBSCurve in RhinoCommon

Rhino.Geometry.NurbsCurve.Create(true, 2, cPts);

Voronoi 3D from Grasshopper3D

Tutorial Link:
http://www.grasshopper3d.com/forum/topics/3d-voronoi-1

Tutorial from un didi:
http://dimitrie.wordpress.com/2009/05/01/3d-voronoi-in-grasshopper/

updated version: http://improved.ro/Grasshopper/Voronoi3dAndQconvex.zip

Qhull : http://www.qhull.org/

Automatic Differentiation

A C++ library that is unlicensed and freely available that performs AD is posted below. A discussion from Grasshopper3D.

Links:
http://www.grasshopper3d.com/forum/topics/gh-feature-request-automatic

Attachment: Fast Automatic Differentiation in C++.zip

http://www.codeproject.com/KB/cpp/fadcpp.aspx

http://en.wikipedia.org/wiki/Automatic_differentiation

Path Mapper

from David:

The PathMapper is a very complicated piece of work, thousands of lines of code go into evaluating and parsing the mapping masks. You can however use PathMapper logic from your own code. What you need to do is create a

GH_LexerCombo

which contains the source and target mappings. Then you can call

GH_Lexer.PerformLexicalReplace()

to map a data tree.

link:http://www.grasshopper3d.com/forum/topics/hi-everyone-help-me-please-on

Isopotential Maps by C#

An attempt to build the Isopotential Maps from the tutorial below:

Tutorial Link: http://www.grasshopper3d.com/profiles/blogs/generating-isopotential-maps

Definition:


Perspective:

Run RhinoScript in C# component in Grasshopper

To run a Rhinoscript in C# component in Grasshopper:

for example:
RMA.Rhino.RhUtil.RhinoApp().RunScript("-_Render");

Archimedian Tilings

GH3D Links: http://www.grasshopper3d.com/forum/topics/archimedian-snub-square-tiling
Wiki : http://en.wikipedia.org/wiki/Snub_square_tilinghttp://www.uwgb.edu/dutchs/symmetry/archtil.htmTiling from Wolframe Alpha