Bug 188058 Bottom arc and top oval of Tube and Cone and Pyramid chart are painted error.
Build ID: I20070323-1616 Steps To Reproduce: 1. New a Tube chart. 2. Flip axis. 3. Preview the chart in viewer. Expected behavior: - The bottom of each series should be arc. - The top of each series should be oval. Actual behavior: - The bottom and top of each series are direct line, refer to attached output file. More information:
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/BaseRenderer.java
{
		return cm;
	}
	/**
	 * @return Returns computation object associated with current renderer.
	 */
	public final Object getComputations( )
	{
		return oComputations;
	}
	/**
	 * @return Returns device renderer associated with current renderer.
	 */
	public final IDeviceRenderer getDevice( )
	{
		return ir;
	}
	/**
	 * Renders a 2D or extruded 2D plane as necessary for a given front surface
	 * polygon. Takes into account the correct z-ordering of each plane and
	 * applies basic lighting. This convenience method may be used by series
	 * type rendering extensions if needed.
	 * 
	 * @param ipr
	 *            A handle to the primitive rendering device
	 * @param oSource
	 *            The object wrapped in the polygon rendering event
	 * @param loaFront
	 *            The co-ordinates of the front face polygon
	 * @param f