a4adfa326bf8bec73020ee1a8aa0cb6251ea8663
tdreszer
  Thu Jul 24 11:20:39 2014 -0700
Checking in changes to make 'spectrum' (aka 'useScore') actually work on any pair of color/altColor settings.  It used to be that only shadesOfGray, shadesOfBrown and shadesOfSea worked, leaving most cases to be shadesOfGray.  I have sat on these changes for months.  I am also checking in ifdef'd out code to calc the shade on the fly, rather than relaying on track->colorShades set of precomputed 10 shades.  The only reason this code is not used is that it would require changing many many places/uses of colorShades.  Since I am bein laid off, it seems inappropriate to make this more dramatic change at this time.
diff --git src/hg/hgTracks/chainTrack.c src/hg/hgTracks/chainTrack.c
index d875599..43437b0 100644
--- src/hg/hgTracks/chainTrack.c
+++ src/hg/hgTracks/chainTrack.c
@@ -337,31 +337,31 @@
     slSort(&list, chainCmpScore);
 else
     slReverse(&list);
 tg->items = list;
 
 
 /* Clean up. */
 sqlFreeResult(&sr);
 hFreeConn(&conn);
 }	/*	chainLoadItems()	*/
 
 static Color chainScoreColor(struct track *tg, void *item, struct hvGfx *hvg)
 {
 struct linkedFeatures *lf = (struct linkedFeatures *)item;
 
-return(tg->colorShades[lf->grayIx]);
+return colorBySpectrumOrDefault(hvg,tg,lf->grayIx,0);
 }
 
 static Color chainNoColor(struct track *tg, void *item, struct hvGfx *hvg)
 {
 return(tg->ixColor);
 }
 
 static void setNoColor(struct track *tg)
 {
 tg->itemColor = chainNoColor;
 tg->color.r = 0;
 tg->color.g = 0;
 tg->color.b = 0;
 tg->altColor.r = 127;
 tg->altColor.g = 127;