go语言制作一个gif动态图

如题，关键不是图怎么样，而是说，go可以拿来实现动态图验证码，加上go支持cgi、fcgi，完全可以做个exe拿去增补现有的服务器么。

ball.go

woniu.go

package main import ( github.com/hydra13142/cube github.com/hydra13142/geom github.com/hydra13142/paint image image/color/palette image/gif math os ) var ( pln *cube.Plain unx, uny cube.Vector ) const ( H = 18 W = 96 ) func init() { pln, _ = cube.NewPlain(cube.Point{}, cube.Vector{2, 2, 1}) uny = cube.FromTo(cube.Point{}, pln.VerticalPoint(cube.Point{0, 0, 10})).Unit() unx = cube.OuterProduct(uny, cube.Vector{2, 2, 1}).Unit() } func main() { var x [H + 1][W]cube.Point var y [H + 1][W]geom.Point dz := math.Pi / H dxy := math.Pi * 4 / W for i := 0; i <= H; i++ { az := float64(i)*dz - math.Pi/2 r := 300 * math.Cos(az) z := 100 * math.Sin(az) for j := 0; j < W; j++ { axy := float64(j) * dxy R := float64(j) * r / W x[i][j] = cube.Point{math.Cos(axy) * R, math.Sin(axy) * R, z} } } pics := make([]*image.Paletted, 0, 20) img := paint.Image{ FR: paint.Green, BG: paint.White, } stp := math.Pi / W delay := make([]int, 0, 2*W) for t := 0; t < 2*W; t++ { img.Image = image.NewPaletted(image.Rect(0, 0, 600, 300), palette.Plan9) for i := 0; i <= H; i++ { for j := 0; j < W; j++ { ox := cube.FromTo(cube.Point{}, x[i][j]) y[i][j] = geom.Point{cube.InnerProduct(ox, unx), cube.InnerProduct(ox, uny)} a, b := x[i][j].X, x[i][j].Y x[i][j].X = a*math.Cos(stp) - b*math.Sin(stp) x[i][j].Y = b*math.Cos(stp) + a*math.Sin(stp) } } img.Line( 300+int(y[0][0].X), 150-int(y[0][0].Y), 300+int(y[H][0].X), 150-int(y[H][0].Y), ) for i := 0; i < H; i++ { for j := 1; j < W; j++ { img.Line( 300+int(y[i][j].X), 150-int(y[i][j].Y), 300+int(y[i][j-1].X), 150-int(y[i][j-1].Y), ) img.Line( 300+int(y[i][j].X), 150-int(y[i][j].Y), 300+int(y[i+1][j].X), 150-int(y[i+1][j].Y), ) } } pics = append(pics, img.Image.(*image.Paletted)) delay = append(delay, 5) } file, _ := os.Create(woniu.gif) defer file.Close() gif.EncodeAll(file, &gif.GIF{ Image: pics, Delay: delay, LoopCount: 5 * len(delay), }) }

rotate.go

package main import ( github.com/hydra13142/cube github.com/hydra13142/geom github.com/hydra13142/paint image image/color/palette image/gif math os ) var ( pln *cube.Plain unx, uny cube.Vector ) const ( H = 9 W = 36 ) func init() { pln, _ = cube.NewPlain(cube.Point{}, cube.Vector{4, 4, 3}) uny = cube.FromTo(cube.Point{}, pln.VerticalPoint(cube.Point{0, 0, 10})).Unit() unx = cube.OuterProduct(uny, cube.Vector{4, 4, 3}).Unit() } func main() { var x [H*W + 1]cube.Point var y [H*W + 1]geom.Point dxy := (math.Pi * 2) / W dz := math.Pi / H for i := 0; i <= H*W; i++ { az := float64(i)*dz/W - math.Pi/2 r := 140 * math.Cos(az) z := 140 * math.Sin(az) axy := float64(i) * dxy x[i] = cube.Point{math.Cos(axy) * r, math.Sin(axy) * r, z} } pics := make([]*image.Paletted, 0, 20) img := paint.Image{ FR: paint.Green, BG: paint.White, } stp := math.Pi * 2 / (W * 3) delay := make([]int, 0, 3*W) for t := 0; t < 3*W; t++ { img.Image = image.NewPaletted(image.Rect(0, 0, 300, 300), palette.Plan9) for i := 0; i <= H*W; i++ { ox := cube.FromTo(cube.Point{}, x[i]) y[i] = geom.Point{cube.InnerProduct(ox, unx), cube.InnerProduct(ox, uny)} a, b := x[i].X, x[i].Z x[i].X = a*math.Cos(stp) - b*math.Sin(stp) x[i].Z = b*math.Cos(stp) + a*math.Sin(stp) } img.Line( 150+int(y[0].X), 150-int(y[0].Y), 150+int(y[H*W].X), 150-int(y[H*W].Y), ) for i := 0; i < H*W; i++ { img.Line( 150+int(y[i].X), 150-int(y[i].Y), 150+int(y[i+1].X), 150-int(y[i+1].Y), ) } pics = append(pics, img.Image.(*image.Paletted)) delay = append(delay, 8) } file, _ := os.Create(rotate.gif) defer file.Close() gif.EncodeAll(file, &gif.GIF{ Image: pics, Delay: delay, LoopCount: 5 * len(delay), }) }

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