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
int iCount = loa.length;
		double dY = 0;
		if ( iProperty == IConstants.MIN )
		{
			dY = loa[0].getY( );
			for ( int i = 1; i < iCount; i++ )
			{
				dY = Math.min( dY, loa[i].getY( ) );
			}
		}
		else if ( iProperty == IConstants.MAX )
		{
			dY = loa[0].getY( );
			for ( int i = 1; i < iCount; i++ )
			{
				dY = Math.max( dY, loa[i].getY( ) );
			}
		}
		else if ( iProperty == IConstants.AVERAGE )
		{
			for ( int i = 0; i < iCount; i++ )
			{
				dY += loa[i].getY( );
			}
			dY /= iCount;
		}
		return dY;
	}
	/**
	 * Finds particular X value from given location list.