EasyGL

An Easy-To-Use Graphics Interface to X11, PostScript, and Win32 Displays

Version 2.0 Click here

EasyGL is a graphics interface to X Windows, MS Windows and PostScript output that was designed to be easy to use by those unfamiliar with X Windows, MS Windows and PostScript. It is also cross-platform compatible -- your graphics will work on any of those 3 platforms, without any changes to your code. It is written in C++.

EasyGL insulates the user from the details of X/MS Windows or PostScript. One subroutine call initializes the graphics display or PostScript file, another closes it down, and in between simple subroutine calls are used to draw graphics primitives. EasyGL handles the redrawing of a window after it has been obscured or resized. EasyGL also allows the user to pan or zoom the displayed graphics by clicking on on-screen buttons -- all transparently to the program incorporating EasyGL. The picture below shows the graphics primitives currently available in EasyGL. To see some more complex graphics generated by a program which uses EasyGL as its graphics interface, click here.

Graphics Primitives

More Technical Information

2-D immediate mode graphics interface to X Windows and Win32.
PostScript output for hardcopy.
Fully event-driven; isolates application program from Window event handling.
Callback functions passed in to EasyGL allow button presses, keyboard input and mouse movement in the application's graphics area to be passed back to the application program for processing.
All drawing is done in user-specified world coordinates -- the application program is isolated from X/MS Windows' pixel based coordinate system.
EasyGL can handle all tasks related to panning and zooming graphics, including user-interface button creation and handling, and changing the coordinate system in order to zoom or pan.
Graphics primitives supported: lines, arcs, rectangles, polygons, ellipses, text.
Graphics attributes supported: colors, line widths, line styles, text font sizes.

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