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Tunnel effects in Go
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| package main | |
| import ( | |
| "image" | |
| "math" | |
| "time" | |
| "github.com/faiface/pixel" | |
| "github.com/faiface/pixel/pixelgl" | |
| "github.com/peterhellberg/plasma" | |
| "github.com/peterhellberg/plasma/palette" | |
| ) | |
| const ( | |
| size = 256 | |
| fsize = float64(size) | |
| w = 640 | |
| fw = float64(w) | |
| h = 480 | |
| fh = float64(h) | |
| ) | |
| func run() { | |
| win, err := pixelgl.NewWindow(pixelgl.WindowConfig{ | |
| Bounds: pixel.R(0, 0, float64(w), float64(h)), | |
| VSync: true, | |
| Undecorated: true, | |
| Resizable: false, | |
| }) | |
| if err != nil { | |
| panic(err) | |
| } | |
| win.SetSmooth(true) | |
| texture := plasmaImage(size, size) | |
| buffer := image.NewRGBA(image.Rect(0, 0, w, h)) | |
| bufferPicture := pixel.PictureDataFromImage(buffer) | |
| distanceTable := [h][w]int{} | |
| angleTable := [h][w]int{} | |
| ratio := 32.0 | |
| for y := 0; y < h; y++ { | |
| for x := 0; x < w; x++ { | |
| fx, fy := float64(x), float64(y) | |
| distance := int(ratio*size/math.Sqrt((fx-fw/2.0)*(fx-fw/2.0)+(fy-fh/2.0)*(fy-fh/2.0))) % size | |
| angle := int(0.5 * size * math.Atan2(fy-fh/2.0, fx-fw/2.0) / math.Pi) | |
| distanceTable[y][x] = distance | |
| angleTable[y][x] = angle | |
| } | |
| } | |
| centerMatrix := pixel.IM.Moved(win.Bounds().Center()).Scaled( | |
| win.Bounds().Center(), 1, | |
| ) | |
| start := time.Now() | |
| go func() { | |
| for range time.Tick(32 * time.Millisecond) { | |
| animation := time.Since(start).Seconds() | |
| shiftX := int(fsize * 1.2 * animation) | |
| shiftY := int(fsize * 0.10 * animation) | |
| for y := 0; y < h; y++ { | |
| for x := 0; x < w; x++ { | |
| buffer.Set(x, y, texture.At( | |
| int(uint(distanceTable[y][x]+shiftX)%size), | |
| int(uint(angleTable[y][x]+shiftY)%size), | |
| )) | |
| } | |
| } | |
| bufferPicture = pixel.PictureDataFromImage(buffer) | |
| } | |
| }() | |
| for !win.Closed() { | |
| win.SetClosed(win.JustPressed(pixelgl.KeyEscape) || win.JustPressed(pixelgl.KeyQ)) | |
| bs := pixel.NewSprite(bufferPicture, bufferPicture.Bounds()) | |
| bs.SetMatrix(centerMatrix) | |
| bs.Draw(win) | |
| win.Update() | |
| } | |
| } | |
| func plasmaImage(w, h int) image.Image { | |
| return plasma.New(w, h, 64).Image(w, h, 12, palette.DefaultGradient) | |
| } | |
| func main() { | |
| pixelgl.Run(run) | |
| } |
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| package main | |
| import ( | |
| "image" | |
| "image/color" | |
| "math" | |
| "time" | |
| "github.com/faiface/pixel" | |
| "github.com/faiface/pixel/pixelgl" | |
| "github.com/peterhellberg/plasma" | |
| "github.com/peterhellberg/plasma/palette" | |
| ) | |
| const ( | |
| size = 256 | |
| fsize = float64(size) | |
| w = 640 | |
| fw = float64(w) | |
| h = 480 | |
| fh = float64(h) | |
| ) | |
| func run() { | |
| win, err := pixelgl.NewWindow(pixelgl.WindowConfig{ | |
| Bounds: pixel.R(0, 0, float64(w), float64(h)), | |
| VSync: true, | |
| Undecorated: true, | |
| Resizable: false, | |
| }) | |
| if err != nil { | |
| panic(err) | |
| } | |
| win.SetSmooth(true) | |
| texture1 := xorImage(size, size) | |
| texture2 := plasmaImage(size, size) | |
| buffer := image.NewRGBA(image.Rect(0, 0, w, h)) | |
| bufferPicture := pixel.PictureDataFromImage(buffer) | |
| distanceTable := [h][w]int{} | |
| angleTable := [h][w]int{} | |
| ratio := 32.0 | |
| for y := 0; y < h; y++ { | |
| for x := 0; x < w; x++ { | |
| fx, fy := float64(x), float64(y) | |
| distance := int(ratio*size/math.Sqrt((fx-fw/2.0)*(fx-fw/2.0)+(fy-fh/2.0)*(fy-fh/2.0))) % size | |
| angle := int(0.5 * size * math.Atan2(fy-fh/2.0, fx-fw/2.0) / math.Pi) | |
| distanceTable[y][x] = distance | |
| angleTable[y][x] = angle | |
| } | |
| } | |
| centerMatrix := pixel.IM.Moved(win.Bounds().Center()).Scaled( | |
| win.Bounds().Center(), 1, | |
| ) | |
| start := time.Now() | |
| go func() { | |
| for range time.Tick(32 * time.Millisecond) { | |
| animation := time.Since(start).Seconds() | |
| shiftX := int(fsize * 1.2 * animation) | |
| shiftY := int(fsize * 0.10 * animation) | |
| for y := 0; y < h; y++ { | |
| for x := 0; x < w; x++ { | |
| texture := texture1 | |
| if int(animation)%2 == 0 { | |
| texture = texture2 | |
| } | |
| buffer.Set(x, y, texture.At( | |
| int(uint(distanceTable[y][x]+shiftX)%size), | |
| int(uint(angleTable[y][x]+shiftY)%size), | |
| )) | |
| } | |
| } | |
| bufferPicture = pixel.PictureDataFromImage(buffer) | |
| } | |
| }() | |
| for !win.Closed() { | |
| win.SetClosed(win.JustPressed(pixelgl.KeyEscape) || win.JustPressed(pixelgl.KeyQ)) | |
| bs := pixel.NewSprite(bufferPicture, bufferPicture.Bounds()) | |
| bs.SetMatrix(centerMatrix) | |
| bs.Draw(win) | |
| win.Update() | |
| } | |
| } | |
| func plasmaImage(w, h int) image.Image { | |
| return plasma.New(w, h, 64).Image(w, h, 12, palette.DefaultGradient) | |
| } | |
| func xorImage(w, h int) image.Image { | |
| m := image.NewRGBA(image.Rect(0, 0, w, h)) | |
| for x := 0; x < w; x++ { | |
| for y := 0; y < h; y++ { | |
| u := uint8(x ^ y) | |
| c := color.RGBA{ | |
| (u) % 192, | |
| 24, | |
| (u & uint8(y)) % 128, | |
| 200, | |
| } | |
| m.Set(x, y, c) | |
| } | |
| } | |
| return m | |
| } | |
| func main() { | |
| pixelgl.Run(run) | |
| } |
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| package main | |
| import ( | |
| "image" | |
| "image/color" | |
| "math" | |
| "time" | |
| "github.com/faiface/pixel" | |
| "github.com/faiface/pixel/pixelgl" | |
| ) | |
| const ( | |
| size = 256 | |
| fsize = float64(size) | |
| w = 640 | |
| fw = float64(w) | |
| h = 480 | |
| fh = float64(h) | |
| ) | |
| func run() { | |
| win, err := pixelgl.NewWindow(pixelgl.WindowConfig{ | |
| Bounds: pixel.R(0, 0, float64(w), float64(h)), | |
| VSync: true, | |
| Undecorated: true, | |
| Resizable: false, | |
| }) | |
| if err != nil { | |
| panic(err) | |
| } | |
| win.SetSmooth(true) | |
| texture := xorImage(size, size) | |
| buffer := image.NewRGBA(image.Rect(0, 0, w, h)) | |
| bufferPicture := pixel.PictureDataFromImage(buffer) | |
| distanceTable := [h][w]int{} | |
| angleTable := [h][w]int{} | |
| ratio := 32.0 | |
| for y := 0; y < h; y++ { | |
| for x := 0; x < w; x++ { | |
| fx, fy := float64(x), float64(y) | |
| distance := int(ratio*size/math.Sqrt((fx-fw/2.0)*(fx-fw/2.0)+(fy-fh/2.0)*(fy-fh/2.0))) % size | |
| angle := int(0.5 * size * math.Atan2(fy-fh/2.0, fx-fw/2.0) / math.Pi) | |
| distanceTable[y][x] = distance | |
| angleTable[y][x] = angle | |
| } | |
| } | |
| centerMatrix := pixel.IM.Moved(win.Bounds().Center()).Scaled( | |
| win.Bounds().Center(), 1, | |
| ) | |
| start := time.Now() | |
| go func() { | |
| for range time.Tick(32 * time.Millisecond) { | |
| animation := time.Since(start).Seconds() | |
| shiftX := int(fsize * 1.2 * animation) | |
| shiftY := int(fsize * 0.10 * animation) | |
| for y := 0; y < h; y++ { | |
| for x := 0; x < w; x++ { | |
| buffer.Set(x, y, texture.At( | |
| int(uint(distanceTable[y][x]+shiftX)%size), | |
| int(uint(angleTable[y][x]+shiftY)%size), | |
| )) | |
| } | |
| } | |
| bufferPicture = pixel.PictureDataFromImage(buffer) | |
| } | |
| }() | |
| for !win.Closed() { | |
| win.SetClosed(win.JustPressed(pixelgl.KeyEscape) || win.JustPressed(pixelgl.KeyQ)) | |
| bs := pixel.NewSprite(bufferPicture, bufferPicture.Bounds()) | |
| bs.SetMatrix(centerMatrix) | |
| bs.Draw(win) | |
| win.Update() | |
| } | |
| } | |
| func xorImage(w, h int) image.Image { | |
| m := image.NewRGBA(image.Rect(0, 0, w, h)) | |
| for x := 0; x < w; x++ { | |
| for y := 0; y < h; y++ { | |
| u := uint8(x ^ y) | |
| c := color.RGBA{ | |
| (u) % 192, | |
| 24, | |
| (u & uint8(y)) % 128, | |
| 200, | |
| } | |
| m.Set(x, y, c) | |
| } | |
| } | |
| return m | |
| } | |
| func main() { | |
| pixelgl.Run(run) | |
| } |
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This code is heavily based on http://lodev.org/cgtutor/tunnel.html#The_code