Bug 194727 Pyramid chart with 2d+ dimension should like a pyramid
Pyramid chart in 2d+ dimension should like a pyramid, rather than a triangle with depth effect. In addition, pyramid in 2d+ should like itself in 3d as well. Take a look at attached screenshot to compare the charts.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
/**
	 * Filters the Null or invalid entry(contains NaN value) from the list. Each
	 * entry should be a double[2] or double[3] array object.
	 * 
	 * @param ll
	 * @return
	 */
	protected List filterNull( List ll )
	{
		ArrayList al = new ArrayList( );
		for ( int i = 0; i < ll.size( ); i++ )
		{
			double[] obj = (double[]) ll.get( i );
			if ( obj == null || Double.isNaN( obj[0] ) || Double.isNaN( obj[1] ) )
			{
				continue;
			}
			al.add( obj );
		}
		return al;
	}
	/**
	 * Filters the Null or invalid entry(contains NaN value) from the array.
	 * 
	 * @param ll
	 * @return
	 */
	protected Location[] filterNull( Location[] ll )
	{
		ArrayList al = new ArrayList( );