go语言制作一个gif动态图

Go  /  管理员 发布于 5年前   233

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

package mainimport (  "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 cube.Vector  uny cube.Vector)const (  H = 18  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 + 1][W]cube.Point  var y [H + 1][W]geom.Point  dz := math.Pi / H  dxy := math.Pi * 2 / W  for i := 0; i <= H; i++ {    az := float64(i)*dz - math.Pi/2    r := 140 * math.Cos(az)    z := 140 * math.Sin(az)    for j := 0; j < W; j++ {      axy := float64(j) * dxy      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 := dxy / 20  delay := make([]int, 0, 20)  for t := 0; t < 20; t++ {    img.Image = image.NewPaletted(image.Rect(0, 0, 300, 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)      }    }    for i := 0; i < H; i++ {      for j := 0; j < W; j++ {        img.Line(          150+int(y[i][j].X),          150-int(y[i][j].Y),          150+int(y[i][(j+1)%W].X),          150-int(y[i][(j+1)%W].Y),        )        img.Line(          150+int(y[i][j].X),          150-int(y[i][j].Y),          150+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("ball.gif")  defer file.Close()  gif.EncodeAll(file, &gif.GIF{    Image:   pics,    Delay:   delay,    LoopCount: 5 * len(delay),  })}

woniu.go

package mainimport (  "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 mainimport (  "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),  })}

以上就是本文的全部内容了，希望大家能够喜欢。