+
+ public static Color rnaHelices[] = null;
+
+ public static void initRnaHelicesShading(int n)
+ {
+ int j = 0;
+ if (rnaHelices == null)
+ {
+ rnaHelices = new Color[n + 1];
+ }
+ else if (rnaHelices != null && rnaHelices.length <= n)
+ {
+ Color[] t = new Color[n + 1];
+ System.arraycopy(rnaHelices, 0, t, 0, rnaHelices.length);
+ j = rnaHelices.length;
+ rnaHelices = t;
+ }
+ else
+ {
+ return;
+ }
+ // Generate random colors and store
+ for (; j <= n; j++)
+ {
+ rnaHelices[j] = jalview.util.ColorUtils
+ .generateRandomColor(Color.white);
+ }
+ }
+
+ /**
+ * delete the existing cached RNA helces colours
+ */
+ public static void resetRnaHelicesShading()
+ {
+ rnaHelices = null;
+ }
+