Add texture example

This commit is contained in:
Sasha Koshka 2024-05-26 16:53:49 -04:00
parent c13db1217d
commit 36ac66b644

83
examples/texture/main.go Normal file
View File

@ -0,0 +1,83 @@
package main
import "math"
import "image"
import "math/rand"
import "image/color"
import "git.tebibyte.media/tomo/x"
import "git.tebibyte.media/tomo/tomo"
func main () {
tomo.Register(0, x.NewBackend)
err := tomo.Run(run)
if err != nil { panic(err) }
}
func run () {
window, err := tomo.NewWindow(image.Rect(0, 0, 256, 256))
if err != nil { panic(err) }
texture := tomo.NewTexture(coolTexture())
box := tomo.NewBox()
box.SetColor(color.Black)
box.SetTextureCenter(texture)
box.SetBorder (
tomo.Border {
Color: [4] color.Color {
color.Black, color.Black,
color.Black, color.Black },
Width: tomo.I(2),
},
tomo.Border {
Color: [4] color.Color {
color.White, color.White,
color.White, color.White },
Width: tomo.I(2),
})
window.SetRoot(box)
window.OnClose(tomo.Stop)
window.SetVisible(true)
}
func coolTexture () image.Image {
// this picture IS COOL because i spent AN HOUR on it when i could have
// been FIXING BUGS!
speedX := 0.015
speedY := 0.035
bitmap := image.NewRGBA (image.Rect(0, 0, 200, 200))
for y := bitmap.Bounds().Min.Y; y < bitmap.Bounds().Max.Y; y++ {
for x := bitmap.Bounds().Min.X; x < bitmap.Bounds().Max.X; x++ {
value := ((
math.Sin(float64(y) * speedY) +
math.Cos(float64(x) * speedX)) + 2) / 4
value *= 0.7
r := value * 0.7 + 0.3
g := math.Sin(value * 7) * 0.7
b := (1 - value) * 0.7
noise := math.Mod(rand.Float64(), 1)
noise = math.Pow(noise, 2) + noise * 0.5
noise *= 0.05
channel := func (f float64) uint8 {
contrast := 1.4
f = f * (contrast) - ((contrast - 1) / 2)
if f < 0 { f = 0 }
if f > 1 { f = 1 }
return uint8(f * 255)
}
bitmap.Set(x, y, color.RGBA {
R: channel(r + noise),
G: channel(g + noise),
B: channel(b + noise),
A: 255,
})
}}
return bitmap
}