**Sverchok tools**
*Custom nodes tools, that makes architectural (initial term) parametric in blender become true.*
UI location	Node Editor > Custom nodes > Add nodes
Version	0.2.7	Author(s)	Alexander Nedovzin, Nikita Gorodetskiy, Agustin Jimenez, Linus Yng, Dealga McArdle
Blender	2.69	License	GPL3

**Executable information**
File name	__init__.py
Current version download	http://github.com/nortikin/sverchok
Data	2014-01-12


Links	Bugs & ChangeLog: http://www.blenderartists.org/forum/showthread.php?272679-Addon-WIP-Sverchok-parametric-tool-for-architects, homesite: http://nikitron.cc.ua/sverchok.html

What is Sverchok

Sverchok IS a tool for generating parametric geometry. We plan on supporting these features until version 2.0.
Sverchok IS NOT a complete node-based redesign of Blender's UI. It does not support node based particles, lighting etc.
Sverchok does not incorporate elements of pynodes' framework spector, because we are focused on a different aim - generating geometry. We are interested in developing Sverchok to work cooperatively with other node systems such as Lukas Toene's node based particle systems.
Main developing line: MATH + MESH + SPLINES + NURBS.

Screenshots

Sverchok is a tool that allows you to generate parametric and procedural forms and geometry with nodes, without having to know any programming or scripting languages.


	ファイル:Распредвал4.png 200px	press for full size image	adaptive polygons 3d
adaptive polygons nodes	cross section 3d	cross section nodes	cross section 3d
cross section nodes	snowfly nodes	snowfly nodes	snowfly nodes
snowfly nodes	snowfly nodes	DrWEB press for full size image	particles press for full size image

I don't know why these gif images animations do not fit to the thumbnails. They are just full-sized

How to Use

Installation

Install the add-on by opening User Preferences and selecting "Install from file..." in the Add-ons tab. Check the checkbox on the right.

Blendersushi posts about sverchok

Уроки на русском языке! === Lessons in Russian!

Data structure and sockets (slots on nodes)

FOR DETAILED INSTRUCTIONS ON DATA LOOK HERE: Data structure of sverchok

Sverchok has specific data structure:

  What is data in Sverchok:

  [[(x0,y0,z0),(x1,y1,z1),(x2,y2,z2)][...     ]...]  that is how it looks 0,1,2,3
0 [                                               ]  socket's container list - essential
1  [object 0                        ][object 1]...   object, matrix, as one list, as many objects so many lists here
2   (vert 0  ),(vert 1  ),(vert 2  )  (...   )       lists
3    x0,y0,z0   x1,y1,z1   x2,y2,z2                  integers, floats

Sockets are:

Vertices socket represent vectors, that define mesh (vertices are vectors and vice versa):

Vertices tree:

  [[(x,y,z)]]
0 [ object,... ]
1 obect = [ v... ]
2 v = (x,y,z)
3 x,y,z = float,float,float

Edges/Polygons/Data socket. cat transfer any data, simply used for create lists, floats, and used as lists of edges and polygons. in viewer it define itself, which kind of data you connect, if in list two elements - it is edges (connect integers), if in list more than two - it is polygons and automatically it draws polygons in 3d view or bake it to blender object with mesh.

Edges/polygons tree:

  [[(n...)]]
0 [ object ]
1 object = [pol...]
2 pol = [n,n,n,n,n]
3 n = integer

Matrixes consists of 4 lines at 4 floats, it defines rotation, scale, translation. It is mathimatically usefull to operate with matrixes. Only one matrix for one object. To draw several objects with the same mesh, you have to connect several matrixes, each of it defines object's location, rotation, scale.

Matrixes tree:

  [[(x,y,z,w)]]
0 [ matrix ]
1 matrix = (a,b,c,d)
2 a,b,c,d = (x,y,z,w)...
3 x,y,z,w = float

Nikitron 17:59, 22 April 2014 (CEST)

Nodes

Basic

Objects in - take data from object
Bake all - bakes all geometry on fly - under development
Viewer draw - draw data in OpenGL and bakes viewed object
Viewer text - show data in "text editor" in "Sverchok text" file
Viewer INDX - show vertices indeces in 3D. lesson howto index
Tools - update all nodes, help, home site, feedback
Wifi in - node to take sockets' values without wires on layout. Needed personal naming in special field to be the same as in output wifi. Work in pare.
Wifi out - node to give sockets' values without wires on layout. Needed personal naming in special field to be the same as in input wifi. Work in pare.
Text in - takes data from text file. Lesson_1, lesson_2
Text out - makes data writed to text in some format - cvs, sverchok or other type. Than you can export it to some format
Frame info - takes current frame, start, end frames
Note - lets you leave notes on layout note node showed

Nikitron 17:59, 22 April 2014 (CEST)

List

List Levels - leave selected levels and delete other levels of nasted lists
List Join - joins some lists in many ways
List Zip - join several objects from one socket, but can join lists
List Shift - shift items to some value usefull in polygons definition
List Reverse - make list 1,2,3,4,5,6 reversed as 6,5,4,3,2,1
List Length - length of selected list level
List Sum - Sum of all items in list (floats and int)
List First&Last - get first and last item in list on selected data level
List Item - pick item
List Repeater - repeat some user-defined level's list some user-defined times
List Math - operates with lists - takes maximum value, minimum value and avarage value
List Flip - flip some level of list that row becomes column and vise versa
List Mask - mask by another boolean list
List Sort - sort list
List Shuffle - randomise list
List Match - making one list match in length for another and vice versa. One ca be shorten, cycled prolonged or repeated prolonged in different levels
Socket convert - temporery solution till we have adaptive sockets universal

Nikitron 17:59, 22 April 2014 (CEST)

Number

Series - makes range of floats
Range - the same, but diapason devided by division's count
List input - creates list from exact values as many as needed
Random - makes so many rendom floats as you tell him. Random from 0 to 1
Float - make float value
Int - make integer value
Float 2 Int - make integer from float
Formula - calculate values by some expressions defined by user (+, -, /, *, min, max, sin, cos, etc.)
Math - math functions in one node
Formula2 - support vector*vector, define hierarhy and calculate respectfully to it. Supporting additionally to formula:

        acos()
        acosh()
        asin()
        asinh()
        atan()
        atan2()
        atanh()
        ceil()
        copysign()
        cos()
        cosh()
        degrees()
        e
        erf()
        erfc()
        exp()
        expm1()
        fabs()
        factorial()
        floor()
        fmod()
        frexp()
        fsum()
        gamma()
        hypot()
        isfinite()
        isinf()
        isnan()
        ldexp()
        lgamma()
        log()
        log10()
        log1p()
        log2()
        modf()
        pi
        pow()
        radians()
        sin()
        sinh()
        sqrt()
        tan()
        tanh()
        trunc()
        ==
        !=
        <, >
        for, in, if, else
        []

and output to vector. Moreover, you can define lists with formula, i.e. 0,1,2,3,4,5 for series or (1,2,3),(1,2,3) for vertices Nikitron 17:59, 22 April 2014 (CEST)

Generators

Line - fully makes line - vertices and edges, can take series of steps
Plane - fully makes plane grid with steps and number of dots, as line do
Box - could be subdivided on X,Y,Z
Cyrcle - could be segmented or chorded
Cylinder - subdivisions in height
Sphere - usual Sphere
Hilbert - Гильбертово пространство, квадрат всегда
Hilbert Image - hilbert from image
Voronoi - makes voronoi 2D field from vectors
Image - mesh defined by image
Random Vector - makes unit normal vectors in random values
Scripted Node - you making script and node appears. details lesson how to make your custom script, lesson how to bind your script to script node

elements of scripts

sintaxis in details

Here are the current implementation rules for node-loadable scripts for Scripted Node:

We have simplifyed syntax - no need if than wxpression with {0}... See templates

the main working function must be called sv_main
function def must have input variables and defaults. It could be def sv_main(veriable=12) for integers/floats defaults or def sv_main(veriable=[]) for lists and series of floats/integers
must have in_sockets and out_sockets , as shown in examples and return them
you can create three types of in/out sockets:

'v' - Vectors socket
's' - edges/polygons/numbers/else socket
'm' - matrices socket

it looks like:

in_sockets = [

['s', 'Vertices', data],

['s', 'Step', step],

]

you can define def sv_main(**your_veriables_here**): and press CTRL+I in text area to automake veriables in in_sockets list. All for your convenient.

Please, use templates in node (popup and button)

Nikitron 23:48, 3 May 2014 (CEST)

Vectors

Vector - is list of three floats (x,y,z), defining 3D situation of one dot

Matrix - here you can find links to educate what is matrix - is three vectors responsible for Location, Scale, Rotation. We define that or change or multiply.

Vector in - make Vector
Vector out - destruct vector to XYZ
Vector normal - gives normal of vector from polygoons and vertices
Vector Move - moves vectors to another verctors
Vector Math - Basic Vector functions in one node. Add, Sub, Normal, Distance, Projection, Cross Product, etc
Matrix apply - apply matrix (locatin, rotation, scale) to vertices, similar to ctrl+A in blender
Vector Drop - makes polygons turned to floor, as they lay on floor. usefull for farthere usage in bezier curve 2D operations and making easy DWG layout to plot or something else. Here we have usage of Vector Drop
Vector X Doubles - remove doubled vertices (twiced node with other in modifiers - need to be removed doubled itself. that irony)
Vector Evaluate - find points from one point to other - can have minus values and more than 1
Vertices Sort - sorting vertices at one direction or another
Matrix Apply - apply Tra/Rot/Sca values to vertices as alt+A
Matrix in - generate matrix
Matrix out - destroy matrix to location and scale
Matrix Deform - define scale, rotate or translate matrixes. It is able to rotate matrix with two vectors: Put initial vector to Rotation Axis vector socket and second to Angle. It will rotate on difference between angles Rot-Ang. It is showed in Spider example file on official site's examples.
Shear Matrix - makes matrix to shear as shift up to one side, bottom to another, for example lesson how to shear
Matrix interpolation - defines "mutations" for middle-deformed matrixes.

Modifier

Centers Polygons - find polygon's centers
Adaptive polygons - makes donor object spreads on recipient object adaptively to each polygon's corners. Donor has to be square on base, and base square has to locate on local zero Z-axis. Lesson how to adaptive polygons
Adaptive Edges - replace some edge of recipient with donor's edges.
Cross Section old - makes section between object and plane. Plane - it is matrix' XY plane, so many matrixes makes many sections
Bisect new - makes crossection with more functions and quicker Here we have how to bisect (cross section)
Solidify - makes mesh extruded
Wireframe - makes wireframed mesh
Line Connection - by edges/polygons (not fully ended) Lesson how to line connection
Delanuary 2D - makes polygons from vectors
Voronoi - makes voronoi edged mesh in floor, 2D frm defined points
Polygon Boom - separates polygons to objects and dropping them to zero point - here we have polygon boom usage
Polygons to Edges - converts polygons to edges Lesson how to polygon to edge
Mesh Join - join several meshes with preserve of vertex indexes in polygons/edges
Mesh Remove Doubles - removes doubled vercites and polygons and edges
Delete Loose - deleting free vertices left from edges/pols, that use some vertices
Convex Hull - as Delaunay node makes triangles on vertices, but in 3D
Intersect edges - finding intersections of edges

Analiser

Distances - find distances between matrixes or vertices
Area - area of polygons and theyr's sum
KDTree vertices - finding closest point to other points list
KDTree edges - creating edges based on distance between vertices

Extensions:2.6/Py/Scripts/Nodes/Sverchok

目次

What is Sverchok

Screenshots

How to Use

Installation

Blendersushi posts about sverchok

Уроки на русском языке! === Lessons in Russian!

Data structure and sockets (slots on nodes)

Nodes

Basic

List

Number

Generators

Vectors

Modifier

Analiser

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