这篇文章主要介绍了go制作一个gif动态图的相关资料,需要的朋友可以参考下
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 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 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 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),
- })
- }
以上就是本文的全部内容了,希望大家能够喜欢。
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