Corrected pie chart color selection computation to reduce consecutive colours for adjancent wedges.

xml/Adjacency.java

		+public class Adjacency {
		+ /**
		+ * Shifts the index for even numbers by 4.
		+ */
		+ public static long d( int n, int t ) {
		+ long te = t + (1- (t%2));
		+
		+ return (long)((n-(t%2))*Math.floor(t/2) % te) + (t%2) - 1;
		+ }
		+
		+ public static void main( String args[] ) {
		+ int t = 9;
		+ for( int i = 1; i <= t; i++ ) {
		+ System.out.printf( "%d\n", d(i, t) );
		+ //System.out.printf( "d(%02d) = %d\n", i, d(i, t) );
		+ }
		+ }
		+}
		+

xml/colour.xsl

		<!--
		\| Prevent similar adjacent colours.
		- \| http://math.stackexchange.com/a/936767/7932
		+ \|
		+ \| wi = wedge index number
		+ \| wt = total number of wedges
		+ \| wte = evenness determiniate for wt
		+ \|
		+ \| http://math.stackexchange.com/a/936276/7932
		+-->
		<xsl:variable name="wi" select="$wedge"/>
		<xsl:variable name="wt" select="$wedges"/>
		- <xsl:variable name="w">
		- <xsl:choose>
		- <xsl:when test="$wt > 5">
		- <xsl:variable name="weven" select="(($wi+4) mod ($wt + $wt mod 2))"/>
		- <xsl:value-of
		- select="$weven * (1-($wi mod 2)) + ($wi mod 2 * $wi)"/>
		- </xsl:when>
		- <xsl:otherwise>
		- <xsl:value-of select="$wedge"/>
		- </xsl:otherwise>
		- </xsl:choose>
		- </xsl:variable>
		+ <xsl:variable name="wte" select="$wt + (1 - ($wt mod 2))"/>
		+
		+ <xsl:variable name="w" select="
		+ round(($wi - ($wt mod 2)) *
		+ floor( $wt div 2 ) mod $wte) +
		+ ($wt mod 2)"/>

		<!-- lch_l, lch_c, and lch_h are now set; rotate the hue. -->

xml/resources.css

Delta	35 lines added, 14 lines removed, 21-line increase