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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) | |
} |
Looking around in the tunnel
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 (
w, h, size = 640, 480, 128
fw, fh, fsize = float64(w), float64(h), float64(size)
)
var (
start = time.Now()
texture = plasmaImage(size, size, 1)
distanceTable = [h * 2][w * 2]int{}
angleTable = [h * 2][w * 2]int{}
ratio = 32.0
)
func run() {
win, err := pixelgl.NewWindow(pixelgl.WindowConfig{
Bounds: pixel.R(0, 0, float64(w), float64(h)),
VSync: true,
Undecorated: true,
})
if err != nil {
panic(err)
}
win.SetSmooth(true)
canvas := pixelgl.NewCanvas(win.Bounds())
go func() {
s := 1
for range time.Tick(32 * time.Millisecond) {
s++
texture = plasmaImage(size, size, s)
}
}()
for y := 0; y < h*2; y++ {
for x := 0; x < w*2; x++ {
fx, fy := float64(x), float64(y)
distance := int(ratio*size/math.Sqrt((fx-fw)*(fx-fw)+(fy-fh)*(fy-fh))) % size
angle := int(0.5 * size * math.Atan2(fy-fh, fx-fw) / math.Pi)
distanceTable[y][x] = distance
angleTable[y][x] = angle
}
}
for !win.Closed() {
win.SetClosed(win.JustPressed(pixelgl.KeyEscape) || win.JustPressed(pixelgl.KeyQ))
drawFrame(canvas)
canvas.Draw(win)
win.Update()
}
}
func drawFrame(canvas *pixelgl.Canvas) {
animation := time.Since(start).Seconds()
shiftX := int(fsize * 0.2 * animation)
shiftY := int(fsize * 0.05 * animation)
shiftLookX := int(fw/2 + float64(int(fw/2*math.Sin(animation))))
shiftLookY := int(fh/2 + float64(int(fh/2*math.Sin(animation*1.6))))
buffer := image.NewRGBA(image.Rect(0, 0, w, h))
for y := 0; y < h; y++ {
for x := 0; x < w; x++ {
buffer.Set(x, y, texture.At(
int(uint(distanceTable[y+shiftLookY][x+shiftLookX]+shiftX)%size),
int(uint(angleTable[y+shiftLookY][x+shiftLookX]+shiftY)%size),
))
}
}
canvas.SetPixels(buffer.Pix)
}
func plasmaImage(w, h, s int) image.Image {
return plasma.New(w, h, 4).Image(w, h, s, palette.DefaultGradient)
}
func main() {
pixelgl.Run(run)
}
This code is heavily based on http://lodev.org/cgtutor/tunnel.html#The_code
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Using the new canvas.SetPixels