Basics Line segments Source file The line command has two arguments: a direction vector, a length. The components of the direction vector have to be coprime no common divisor except 1 , and they are restricted to the integers. Because of the restrictions to direction vectors, drawing line segments usually necessitates an extensive search for suitable points. In many cases, drawing the desired line segments may not be possible without the use of additional packages, such as eepic , or pstricks.
List of LaTeX environments
tikz pgf - LaTeX Error: environment tikzpicture undefined - TeX - LaTeX Stack Exchange
TeX was not designed as a programming language, but there are occasions when you want to repeat some part of your document, just as parts of programs need to run several times. The syntax is simple enough, but it use of TeX conditionals is different enough that many people find it confusing. Both current LaTeX and experimental LaTeX3 have iteration commands for internal use and for package writers; their use is probably not recommendable. The LaTeX picture environment has a simple command for repeated drawing:. It may be used with nothing but an iterative calculation in the braced argument, in which case its graphical capabilities have no effect. The pgffor package, which is part of the pgf distribution, also provides iterations to support the needs of graphics. Its syntax is in the style of common programming languages:.
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There are many packages to do pictures in La TeX itself rather than importing graphics created externally , ranging from simple use of LaTeX picture environment, through enhancements like eepic , to sophisticated but slow drawing with PicTeX. Depending on your type of drawing, and setup, here are a few systems you may consider:. Since PostScript is itself a pretty powerful programming language, many astounding things can in principle be achieved using PSTricks a wide range of contributed packages, ranging from world mapping to lens design diagrams, is available. There is a PSTricks mailing list pstricks tug. MetaPost; you liked MetaFont, but never got to grips with font files?
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