Bug 189607 2D+ Curve Fitting Line does not work correctly [0001]
Description: 2D+ Curve Fitting Line does not work correctly. Build number: 2.2.0.v20070529-1039 Steps to reproduce: 1. Preview the attached design file. Expected result: Curve Fitting Line for 2D+ works corrctly. Actual result: See the screenshot. Error log: N/A
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/render/CurveRenderer.java
faB[i] = 1.0f - faC[i];
				faA[i] = 3.0f * ( dy2 - dy1 );
				dy1 = dy2;
			}
			faC[0] = 0.0f;
			faB[0] = 0.0f;
			faA[0] = 0.0f;
			for ( int i = 1; i < iNumberOfPoints - 1; i++ )
			{
				p = faB[i] * faC[i - 1] + 2.0f;
				faC[i] = -faC[i] / p;
				faB[i] = ( faA[i] - faB[i] * faB[i - 1] ) / p;
			}
			dy1 = 0;
			for ( int i = iNumberOfPoints - 2; i >= 0; i-- )
			{
				dy2 = faC[i] * dy1 + faB[i];
				faA[i] = ( dy1 - dy2 ) / 6.0f;
				faB[i] = dy2 / 2.0f;
				faC[i] = ( fa[i + 1] - fa[i] ) - 1 * ( faB[i] + faA[i] );
				dy1 = dy2;
			}
		}
		/**
		 * 
		 * @param x
		 * @return
		 */
		private final double computeValue( double x )
		{