wumpus-core: Pure Haskell PostScript and SVG generation.
Wumpus - (W)riter (M)onad (P)ost (S)cript.
Wumpus is a kernel library for generating 2D vector pictures,
its salient feature is portability due to no FFI dependencies.
It can generate PostScript (EPS) files and SVG files. The
generated PostScript code is plain  and reasonably
efficient as the use of stack operations, i.e
grestore, is minimized.
Pictures in Wumpus are made from paths and text labels. Paths themselves are made from points. The usual affine transformations (rotations, scaling, translations) can be applied to geometric objects. Unlike PostScript there is no notion of a current point, Wumpus builds pictures in a coordinate-free style.
For actually drawing pictures, diagrams, etc. Wumpus is very
low level. There is a supplemantary package
available that helps create certain types of diagram, but even
this lacks the higher-level stuff (polygons, arrows etc.) that
would make creating general drawings easy.
Some of the design decisions made for wumpus-core are not sophisticated (e.g. how attributes like colour are handled, and how the bounding boxes of text labels are calculated), so Wumpus might be limited compared to other systems. However, the design permits a fairly simple implementation - which is a priority. Text encoding an exception - I'm not sure how reasonable the design is. The current implementation appears okay for Latin 1 but may be inadequate for other character sets, so I may have to revise it significantly.
Core.BoundingBox is likely to be reworked
significantly in the future. It has too many functions that do
not offer distinct functionality. Some functions were removed in
revision 0.17.0 and some more are likely to follow.
Extra.PictureLanguage is deprecated. At some point
it will be superceded by
wumpus-basic but this will not be soon.
\[1\] Because the output is simple, straight-line PostScript code, it is possible to use GraphicsMagick or a similar tool to convert Wumpus's EPS files to many other formats (bitmaps).
20.0 to 0.21.0:
Removed the instances of the Affine transformation. They have been replaced with special transformation functions:
translatePrimitive. As Primitives are not in an affine frame until they are lifted to Pictures the affine instances had ill-conceived semantics.
Due to changes to accommodate the new non-affine transformations, many of the class obligations have changed on the
unitof Pictures, Primitives, Bounding Boxes etc. Generally many class contexts that previously required Fractional and Ord on the unit have changed to Real and Floating.
Removed demo/AffineTest04.hs - there is no longer a
rotateAboutoperation on Primitives as they do not exist in an affine frame until they they are lifted to Pictures. Added - Scaled.hs, Rotated.hs, Translated,hs.
Removed the UndecidableInstances pragma from Core.PictureInternal. It looks like Core.Geometry will always need UndecidableInstances though.
Removed the Ord superclass constriant from the
Fillclasses and derived operations (e.g.
|Versions [faq]||0.12.0, 0.13.0, 0.13.1, 0.14.0, 0.15.0, 0.16.0, 0.17.0, 0.18.0, 0.19.0, 0.20.0, 0.21.0, 0.22.0, 0.23.0, 0.30.0, 0.31.0, 0.32.0, 0.33.0, 0.34.0, 0.35.0, 0.36.0, 0.37.0, 0.40.0, 0.41.0, 0.42.0, 0.42.1, 0.43.0, 0.50.0, 0.51.0, 0.52.0, 0.52.1|
|Dependencies||algebra (<0.1), base (<5), containers, monadLib, time (>=1.1.3 && <1.2), vector-space, wl-pprint, xml [details]|
|Copyright||Stephen Tetley <email@example.com>|
|Maintainer||Stephen Tetley <firstname.lastname@example.org>|
|Revised||Revision 1 made by HerbertValerioRiedel at Sat Nov 7 12:22:24 UTC 2015|
|Uploaded||by StephenTetley at Sat Jul 10 10:53:17 UTC 2010|
|Downloads||15942 total (128 in the last 30 days)|
|Rating||(no votes yet) [estimated by rule of succession]|
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