Gloss hides the pain of drawing simple vector graphics behind a nice data type and a few display functions.

Getting something on the screen is as easy as:

    import Graphics.Gloss
    main = display (InWindow "Nice Window" (200, 200) (10, 10)) white (Circle 80)

Once the window is open you can use the following:

• Quit - esc-key.
• Move Viewport - left-click drag, arrow keys.
• Rotate Viewport - right-click drag, control-left-click drag, or home/end-keys.
• Zoom Viewport - mouse wheel, or page up/down-keys.

Animations can be constructed similarly using the animate.

If you want to run a simulation based around finite time steps then try simulate.

If you want to manage your own key/mouse events then use play.

Gloss uses OpenGL under the hood, but you don't have to worry about any of that.

Gloss programs should be compiled with -threaded, otherwise the GHC runtime will limit the frame-rate to around 20Hz.

Release Notes:

For 1.7.0:
   * Tweaked circle level-of-detail reduction code.
   * Increased frame rate cap to 100hz.
   Thanks to Doug Burke
   * Primitives for drawing arcs and sectors.
   Thanks to Thomas DuBuisson
   * IO versions of animate, simplate and play.

For 1.6.0:
   Thanks to Anthony Cowley
   * Full screen display mode.

For 1.5.0:
   * O(1) Conversion of ForeignPtrs to bitmaps.
   * An extra flag on the Bitmap constructor allows bitmaps to be cached
     in texture memory between frames.

For 1.4.0:
   Thanks to Christiaan Baaij: 
   * Refactoring of Gloss internals to support multiple window manager backends.
   * Support for using GLFW as the window library instead of GLUT.
     GLUT is still the default, but to use GLFW install gloss with:
        cabal install gloss --flags="GLFW -GLUT"

For more information, check out http://gloss.ouroborus.net.