So the reason I keep pinging the list so much of late is I'm currently writing a GLUT program to visualize a heirarchical clustering of 18,000+ protein-protein interaction pairs (and associated gene-ontology terms). Thanks for the help on reading CSVs, those who wrote me back... my program intitializes and displays its first image within 6 seconds, about 10 times faster and in 10 times less memory than the Java program the guy was using.
Now I'm to the point of making this thing interactive, and I I'm trying to figure out the Haskell way of doing this. Last time I wrote a program like this, I made a record data type with all the state and placed it into an IORef and curried it into the GLUT callback functions. I'm going to do the same thing now if there aren't cringes and wailings from people with a better sense of pure-functional aesthetics out there on the list with a willingness to either point me towards a tutorial that would help me do this better. Keep in mind that Graphics.UI.GLUT callbacks all want to return an IO (), and thus leftover state monads at ends of functions aren't going to be acceptable to the standard library... Any ideas? Oh, currently my program state includes: The geometry I'm rendering (Ptr GLfloat vertex and color arrays), The same geometry as a display list for rendering into the selection buffer An indexed and named tree that represents the clustering A tree of text containing tooltips to display The previous current mouse position (for dragging purposes) A couple of histograms as Array.IArray.Diff.DiffArrays Various parameters for constructing rendered data out of the indexed tree (for reconstruction after a node is collapsed/expanded) So I'm carrying around some pretty bulky state; should give you some understanding as to why I thougt the record data type would be the sanest way to do this without polluting my parameter list with individual IORrefs. Oh, and again, it's not that I don't know that I can make the IORef solution work, I can and I've done it before. It's just that I thought there might be a prettier way to do this. Thanks in advance! -- Jeff _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
