ZacharyZhang-NY
8be66c09f2
Palette cycling, sky, sun and moon, clouds, starfield, rain, snow, petals, leaves, fireflies, waterfall, ocean, campfire, lava, aurora, lightning, mountains and a season scene; scanlines, vignette, screen shake, flash, dither fades, iris wipes, dissolves, mosaics, glitches, sparkles, explosions and confetti. Home opens on a live scene in the palette's season and a strip of all eight palettes. pixel adds Canvas.Cycled, Sprite.At, SpriteOf, Kit.Toward and Kit.Shot, which spends a cue under Reduce Motion so it never replays; display exports Reduce. Gallery grids and the sidebar are one Tab stop each.
62 lines
1.7 KiB
Go
62 lines
1.7 KiB
Go
package fx
|
|
|
|
import (
|
|
"github.com/egoist/mygo/ui"
|
|
|
|
"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
|
|
)
|
|
|
|
type LavaOptions struct {
|
|
// Width and Height are dots; zeros mean 160 by 48.
|
|
Width, Height int
|
|
Label string
|
|
}
|
|
|
|
// Lava flows in cycling veins while bubbles swell and pop.
|
|
func Lava(c *ui.Context, o LavaOptions) *ui.Element {
|
|
k := pixel.K(c)
|
|
w, h := size("Lava", o.Width, o.Height, 160, 48)
|
|
return box(c, k, o.Label, w, h).Draw(func(p *ui.Painter, r ui.Rect) {
|
|
g := k.Canvas(p, r)
|
|
g.Clip(0, 0, g.W, g.H, func() { lava(g, k, g.Step(6)) })
|
|
})
|
|
}
|
|
|
|
// lava's veins flow and cycle row by row; crust drifts.
|
|
func lava(g pixel.Canvas, k pixel.Kit, step int) {
|
|
g.Rect(0, 0, g.W, g.H, pixel.Bad)
|
|
band := pixel.Cycle([]pixel.Slot{pixel.Warn, pixel.Warn, light(k), pixel.Warn, pixel.Bad, pixel.Bad}, -step)
|
|
for j := 0; 4*j < g.H; j++ {
|
|
s, dir := band[j%len(band)], 1-2*(j%2)
|
|
for i := range g.W/14 + 1 {
|
|
x := wrap(rnd(i, 130+j)+dir*step, g.W+16) - 8
|
|
g.Rect(x, 4*j+1+rnd(i, 140+j)%2, 4+rnd(i, 150+j)%8, 1, s)
|
|
}
|
|
}
|
|
crust := pick(k, pixel.Edge, pixel.Shade)
|
|
for i := range g.W * g.H / 300 {
|
|
g.Rect(wrap(rnd(i, 160)+step/2, g.W), rnd(i, 161)%g.H, 2+rnd(i, 162)%3, 1, crust)
|
|
}
|
|
for i := range max(2, g.W/24) {
|
|
t := step + rnd(i, 130)
|
|
// Each life of a bubble rises somewhere new.
|
|
x, y := rnd(t/12*64+i, 131)%g.W, 4+rnd(t/12*64+i, 132)%max(1, g.H-8)
|
|
switch wrap(t, 12) {
|
|
case 4:
|
|
g.Dot(x, y, pixel.Warn)
|
|
case 5:
|
|
g.Disc(x, y, 1, pixel.Warn)
|
|
case 6:
|
|
g.Disc(x, y, 2, pixel.Warn)
|
|
g.Dot(x-1, y-1, light(k))
|
|
case 7:
|
|
g.Circle(x, y, 3, pixel.Warn)
|
|
g.Dot(x-1, y-1, light(k))
|
|
case 8:
|
|
for _, d := range [][2]int{{-4, 0}, {4, 0}, {0, -4}, {0, 4}} {
|
|
g.Dot(x+d[0], y+d[1], pixel.Warn)
|
|
}
|
|
}
|
|
}
|
|
}
|