C_GDI+编程教程(16)

本章主要介绍使用C#进行图形图像编程基础,其中包括GDI+绘图基础、C#图像处理基础以及简单的图像处理技术。

//指定路径中心点

brush.CenterPoint = centerPoint; //指定路径中心的颜色

brush.CenterColor = Color.Red;

//Color类型的数组指定与路径上每个顶点的颜色

brush.SurroundColors = new Color[] { Color.Plum };

g.FillEllipse(brush,centerPoint.X-R,centerPoint.Y-R,2*R,2* R); centerPoint = new Point(350, 100); R = 20;

path = new GraphicsPath();

path.AddEllipse(centerPoint.X-R,centerPoint.Y-R,2*R,2*R); path.AddEllipse(centerPoint.X-2*R,centerPoint.Y-2*R,4*R,4* R); path.AddEllipse(centerPoint.X-3*R,centerPoint.Y-3*R,6*R,6* R); brush = new PathGradientBrush(path); brush.CenterPoint = centerPoint; brush.CenterColor = Color.Red;

brush.SurroundColors = new Color[] { Color.Black, Color.Blue, Color.Green };

g.FillPath(brush, path); }

运行结果如图7.11所示。

图7.11 PathGradientBrush应用