Latest additions to the TikZ and PGF examples gallery

Coloring diagrams - linear relaxation

Sun, 09 Mar 2014 14:37:57 +0100

Author: Henri Menke

TikZ is used for reproducing a diagram by Lê Nguyên Hoang seen: on http://www.science4all.org/le-nguyen-hoang/integer-programming/

The code was written by Henri Menke and published on TeX.SE.

Energy level diagrams - illustrating Hund's rule

Sun, 09 Mar 2014 14:33:23 +0100

Author: Henri Menke

Here we illustrate Hund’s rules, which is a set of rules in atomic physics written by the German physicist Friedrich Hund. They are used to determine the term symbol corresponding to the ground state of a multi-electron atom.

All the coloring is done using styles so it is easy to change the style of the drawing.

The code was written by Henri Menke and published on TeX.SE.

LR constraints - Drawing and filling with arcs and Bezier curves

Sun, 09 Mar 2014 14:26:49 +0100

Author: Henri Menke

We use TikZ to reproduce a diagram seen in an article “The Left-Right Planarity Test” by Ulrik Brandes.

At first we adjust the bounding box by hand, because the control points of the Bezier curves exceed the limits of the visible drawing.

The code was written by Henri Menke and published on TeX.SE.

Transversal loads

Sun, 09 Mar 2014 12:13:55 +0100

Author: Marco Castelli

Transversal loads and bending moment on a cross section, created with TikZ using the structuralanalysis package.

Shear torsion

Sun, 09 Mar 2014 12:13:08 +0100

Author: Marco Castelli

Structural analysis of three different torsional problem, created with TikZ using the 3Dstructuralanalysis package.

Venn diagramm with PGF 3.0 blend mode

Fri, 28 Feb 2014 11:32:36 +0100

Author: Paul Gaborit

With TikZ 3.0, there’s a new kind of transparency: you can use blend modes.

From the manual:

A blend mode specifies how colors mix when you paint on a canvas. Normally, if you paint a red box on a green circle, the red color will completely replace the green circle. However, in some situations you might also wish the red color to somehow “mix” or “blend” with the green circle. We already saw that, using transparency, we can draw something without completely obscuring the background. Blending is a similar operation, only here we mix colors in more complicated ways.

Note: Blending is a rather “advanced” feature of PDF. Most renderers, let alone printers, will have trouble rendering blending correctly.

Below is an example of screen blend mode (there are 16 modes: normal, multiply, screen, overlay, darken, lighten, color dodge, color burn, hard light, soft light, difference, exclusion, hue, saturation, color, luminosity).

This code was written by Paul Gaborit and published on TeX.SE.

Drawing trees with the PG 3.0 pic feature

Fri, 28 Feb 2014 11:11:34 +0100

Authors: Kate , Ignasi

PGF 3.0 introduces pic, a “short picture” which can be inserted in any place of a tikzpicture.

From the manual: A “pic” is a “short picture” (hence the short name…) that can be inserted anywhere in TikZ picture where you could also insert a node. Similarly to nodes, pics have a “shape” (called type to avoid confusion) that someone has defined. Each time a pic of a specified type is used, the type’s code is executed, resulting in some drawings to be added to the current picture. The syntax for adding nodes and adding pics to a picture are also very similar. The core difference is that pics are typically more complex than nodes and may consist of a whole bunch of nodes themselves together with complex paths joining them.

Here we use the pic feature for drawing a tree several times.

The code was written by Kate and Ignasi and published on TeX.SE.

Drawing a graph using the PG 3.0 graphdrawing library

Fri, 28 Feb 2014 09:51:38 +0100

Author: Mark Wibrow

PGF 3.0 offers a new convenient and capable library for drawing graphs. The so called graphdrawing library requires compiling via LuaTeX.

The code was written by Mark Wibrow and published on TeX.SE.

Drawing angles using the PG 3.0 angles and quotes libraries

Fri, 28 Feb 2014 09:25:03 +0100

Author: Paul Gaborit

PGF 3.0 brings a new library for drawing angles. A pic type angle=a--b--c adds a drawing of an angle to the current path. It consists of a “sector” or “wedge” or “slice” whose pointed end is at point b and whose straight sides lie on the lines from b to a and from b to c. You can specify radius and eccentricity.

Another new library “quotes” is providing a quote syntax for labels, pins, edge nodes, and pic texts. You can use a simple string “text” or a string with options, such as node["text" {red, draw, thick}] to achieve an effect like node[label={[red,draw,thick]text}] with less writing and more readability.

This code was written by Paul Gaborit and published on TeX.SE.

Fancy arrows drawn with the PGF 3.0 arrows.meta library

Fri, 28 Feb 2014 09:04:07 +0100

Author: Qrrbrbirlbel

PGF 3.0 provides a new library called arrows.meta. Now you can bend arrows, change arrow tips on the fly, have several arrow tips in a row, and you can use a special syntax for changing the individual appearance. You can scale, color, joing, bend, flex, and more, and now there are a lot of more predefined arrow tips.

This code was written by Qrrbrbirlbel answering a Question of James Stav and published on TeX.SE.