关于OpenCV的Mat画图问题

由于OpenCV的java版本画图有太多错误，只能自己编写画图的代码，在一个函数中，编写出画圆和深度距离的代码，

代码如下：

public int CircleMyMat(Mat Show, Point3 Center, double Radius, Scalar COLOR ,int Width)

		{

			//请空画布为白色

			Show = Mat.zeros(Show.size(), CvType.CV_8UC3);

			//Core.bitwise_not(Show, Show);//反色！

			double[] C= Show.get(0, 0);

			C[0]= 0;C[1]= 0;C[2]= 255;//C[0]= 0;C[1]= 0;C[2]= 0;

			//1.获取圈的值//画出圆！

			int CenterX = (int) Center.x;

			int CenterY = (int) Center.y;

			int    R = (int)Radius;

			List<Point3 >  CirclePoints = new LinkedList<Point3 >();

			//得到圆上点的值！

			int MaxX= CenterX + (int)R;

			int MinX= CenterX - (int)R;

			int i =0; int X =0; int Y =0;

			for(i = 0-R; i<R ;++i){

				Point3 PointIn= new Point3();

				PointIn.x  = i + CenterX ;

				PointIn.y  = Math.sqrt( Math.abs(R*R - i*i) );//这个公式ZTMD关键！

				PointIn.y  = CenterY + PointIn.y ;

				CirclePoints.add(PointIn);

			}

			//取下半部分！

			for(i = 0-R; i<R ;++i){

				Point3 PointIn= new Point3();

				PointIn.x  = i + CenterX ;

				PointIn.y  = Math.sqrt( Math.abs(R*R - i*i) );//这个公式ZTMD关键！

				PointIn.y  = CenterY - PointIn.y ;

				PointIn.z  = 1;

				CirclePoints.add(PointIn);

			}

			//2.获取Z值//画在右方如何？//固定缩放系数//保证不要跑出边界！

			int CenterZ = (int) Center.z;

			int Zl      = CenterZ;//Zl直接作为长度被使用！

			//2.2 。画出一条线来！

			Point ttt0 = new Point();

			Point ttt1 = new Point();

			ttt0.x = CenterX;

			ttt0.y = CenterY;

			ttt1.x = CenterX +  Zl;//ttt1.x = CenterX + 20;//

			ttt1.y = CenterY;

			lineMyMat(Show, ttt0, ttt1, COLOR ,Width);

			//3.画出圈来！//在此调整粗细！

			double[] P;

			int Idx =0;

			for( Idx=0; Idx< CirclePoints.size(); ++Idx)

			{

				P= C;

				X= (int )CirclePoints.get(Idx).x;

				Y= (int )CirclePoints.get(Idx).y;

				Show.put(Y,X, P);//frameRf.put(Y, X, P);

				++X;++Y;

				Show.put( Y, X, C);

				++X;++Y;

				Show.put( Y, X, C);

			}

			return 1;

		}

出现了无法画图的问题，总是找不到原因。

最后，把

Show = Mat.zeros(Show.size(), CvType.CV_8UC3);

注销掉，程序可以运行了。

原因到底是什么，一时难以理解......................