Question

c #如何实现图片旋转

Answer 1

Timer timer1;//定时旋转和移动 Graphics g;//背景图的画图对象 float x = 0;//水平移动的初始位置 private void pictureBox1_Click(object sender, EventArgs e){bmp=new Bitmap(@"..\..\1.bmp"); background = new Bitmap(pictureBox1.Width, pictureBox1.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);//画在PictureBox上 g = Graphics.FromImage(background); g.TranslateTransform(background.Width / 2, background.Height / 2);//移动一下中心点，画在背景的中央，好看些 timer1 = new Timer(); timer1.Interval = 100; timer1.Tick += new EventHandler(timer1_Tick); timer1.Enabled = true;}void timer1_Tick(object sender, EventArgs e){ g.Clear(Color.Black); g.RotateTransform(10.0F);//每次旋转10度，实际上是画图坐标旋转 g.DrawImage(bmp, -bmp.Width/2, -bmp.Height/2);//源图中心点和画图对象中心重合，自旋转效果，否则会以左上角为中心旋转 Graphics gb=pictureBox1.CreateGraphics(); x += 3.0f;//水平移动效果，步长3像素