User:Lenny222

Things i think need improvement

• Diagrams
• GHC error messages
• Haskell Cookbook
• Haskell explained to the busy
• Mac OS X

Chlor

• Haskell SVN
• Objective-C SVN

• lib2geom

• http://pyx.sourceforge.net/examples/drawing2/parallel.html
  • http://pyx.svn.sourceforge.net/viewvc/pyx/trunk/pyx/pyx/

Todo

• Primitive
  • Circle durch Ellipse ersetzen
  • Polyline [(Double, Double)]
  • Polygon [(Double, Double)]

• Shape refactoring, e.g. sine :: Int -> Shape => sine :: Int -> [Primitive]
  • Circle
  • Ellipse
  • Rectangle
  • Sine

• defaultStroke :: Stroke
• defaultEffects :: [Effect]
• defaultFill :: Fill
• defaultObject :: Object

• Datatypes
  • Angle (degrees, grads, radians)
  • Unit

  data SvgUnit =
          UnitCM
        | UnitEM
        | UnitEX
        | UnitIN
        | UnitMM
        | UnitPC
        | UnitPT
        | UnitPX
        | UnitPercent
        deriving(Eq, Show)

• • • defaultUnit

  • data Length = Length Unit Double deriving(Eq, Show)
    

• new Shapes
  • regularPolygon :: -- ^ n, startAngle, radius, box
  • star :: -- ^ n, startAngle, radius1, radius2, box

• Path
  • ArcTo: http://chlor.svn.sourceforge.net/viewvc/chlor/trunk/src/core/CPath.m?revision=561&view=markup
    • http://www.w3.org/TR/SVG/implnote.html#ArcImplementationNotes
    • http://lib2geom.svn.sourceforge.net/viewvc/lib2geom/lib2geom/trunk/src/2geom/elliptical-arc.h
    • http://lib2geom.svn.sourceforge.net/viewvc/lib2geom/lib2geom/trunk/src/2geom/elliptical-arc.cpp

• Path
  • "Path Bool [Segment]" isClosed flag instead of "Close" segment?
    • Pros:
      • no need to travel to the last segment to find out whether a path is closed
    • Cons:
  • remove one Point in Segments
    • Pros: paths are more consistent, less duplication
    • Cons: Segments stop being standalone
    • Interesting: how to get the last point of the previous segment?

• Diagram
  • Histogram http://had.co.nz/ggplot2/geom_histogram.html
  • Pie (only for displaying fractions)
  • Stairs http://had.co.nz/ggplot2/geom_step.html

• Shape
  • http://www.jroller.com/aalmiray/entry/jsilhouette_0_3_released
    • http://code.google.com/p/jsilhouette/
  • Spiral
  • http://local.wasp.uwa.edu.au/~pbourke/geometry/supershape/

• SVG export
  • SvgPath

    • <path d="M 100 100 L 300 100 L 200 300 z" fill="red" stroke="blue" stroke-width="3" />

  • SvgRectangle

    • <rect x="400" y="100" width="400" height="200" fill="yellow" stroke="navy" stroke-width="10" />

• ObjectLike: DList instead of List?

• SVG XML generation
  • HStringTemplate?
  • HXT?
  • HaXml?

• colour

• Layout
  • Instances
    • Column
    • Grid (cols, rows, margins)
    • Margin/Frame
      • content size (absolute, relative, remaining)
      • margin sizes (absolute, relative, remaining)

• repeatedly
  • use HLint
  • use ghc -W

• AffineTransformation

• Path
  • approximate :: Double -> [(Double, Double)] -> [Segment] -- ^ error, points
    • http://tog.acm.org/resources/GraphicsGems/gems/FitCurves.c

Ideas

• layout
  • Table
  • SpaceHorizontal
  • SpaceVertical

• 3d projection
  • 3d projection
• diagrams
  • histograms, density plots
• export
  • SVG
  • PDF
  • Illustrator JavaScript
  • Processing
  • SWF
  • TikZ/LaTeX
• import
  • SVG
  • PDF
• path operations
  • boolean operations
  • offset path
  • http://inkscape.svn.sourceforge.net/viewvc/inkscape/inkscape/trunk/src/live_effects/
• recursive programming
  • ContextFree

Simplified Haskell homepage

A simplified Haskell frontpage

Why?

• to add a structure
• to reduce redundancy
• to make scanning easier:
  • why scanning
  • first two words