1 public Bitmap Rotate(Bitmap b, int angle) 2 { 3 angle = angle % 360; 4 5 //弧度转换 6 double radian = angle * Math.PI / 180.0; 7 double cos = Math.Cos(radian); 8 double sin = Math.Sin(radian); 9 10 //原图的宽和高 11 int w = b.Width; 12 int h = b.Height; 13 int W = w; 14 int H = h; 15 //目标位图 16 Bitmap dsImage = new Bitmap(W, H); 17 Graphics g = Graphics.FromImage(dsImage); 18 19 g.InterpolationMode = InterpolationMode.Bilinear; 20 21 g.SmoothingMode = SmoothingMode.HighQuality; 22 23 //计算偏移量 24 Point Offset = new Point((W - w) / 2, (H - h) / 2); 25 26 ////构造图像显示区域:让图像的中心与窗口的中心点一致 27 Rectangle rect = new Rectangle(Offset.X, Offset.Y, w, h); 28 Point center = new Point(rect.X + rect.Width / 2, rect.Y + rect.Height / 2); 29 30 g.TranslateTransform(center.X, center.Y); 31 32 //逆时针旋转 33 // g.RotateTransform(360 - angle); 34 35 //顺时针旋转 36 g.RotateTransform(angle); 37 //恢复图像在水平和垂直方向的平移 38 g.TranslateTransform(-center.X, -center.Y); 39 g.Clear(Color.White); 40 41 g.DrawImage(b, rect); 42 43 //重至绘图的所有变换 44 g.ResetTransform(); 45 46 g.Save(); 47 g.Dispose(); 48 return dsImage; 49 }
代码调用,生成360度图片并保存
1 for (int i = 0; i <= 360; i++) 2 { 3 string path = @"C:\Users\yc\Desktop\生成后图片\"+fileName; 4 DirectoryInfo directoryInfo = new DirectoryInfo(path); 5 if (!directoryInfo.Exists) 6 { 7 directoryInfo.Create(); 8 } 9 Bitmap image = new Bitmap(FindResult[k].ToString()); 10 11 Bitmap imagenew = Rotate(image, i); 12 Image images = (Image)imagenew; 13 string name = path+"\\" + i + ".png"; 14 images.Save(name); 15 }