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.
58 lines
1.7 KiB
Go
58 lines
1.7 KiB
Go
package fx
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import (
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/8bitMyGoUI/pixel"
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)
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type WaterfallOptions struct {
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// Width and Height are dots; zeros mean 64 by 96.
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Width, Height int
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Label string
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}
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// Waterfall pours between cliffs by cycling its water slots.
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func Waterfall(c *ui.Context, o WaterfallOptions) *ui.Element {
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k := pixel.K(c)
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w, h := size("Waterfall", o.Width, o.Height, 64, 96)
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return box(c, k, o.Label, w, h).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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g.Clip(0, 0, g.W, g.H, func() { waterfall(g, k, g.Step(10)) })
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})
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}
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// waterfall lights one three-row segment in six per column.
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func waterfall(g pixel.Canvas, k pixel.Kit, step int) {
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l, r, pool := g.W/4, g.W-g.W/4, g.H-g.H/6
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rock, lit := pick(k, pixel.Faint, pixel.Face), pick(k, pixel.Shade, pixel.Lit)
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g.Rect(0, 0, l, g.H, rock)
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g.Rect(r, 0, g.W-r, g.H, rock)
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for i := range g.H / 3 {
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x := rnd(i, 110) % max(1, l-2)
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if i%2 == 1 {
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x += r + 1
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}
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g.HLine(x, rnd(i, 111)%pool, 2, lit)
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}
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g.Rect(l, 0, r-l, pool, pixel.Info)
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// Segments take the band turned back each step: falling.
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band := pixel.Cycle([]pixel.Slot{light(k), pixel.Info, pixel.Info, pixel.Info, pixel.Info, pixel.Info}, -step)
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for x := l; x < r; x++ {
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off := rnd(x, 112) % 6
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for seg := 0; 3*seg < pool; seg++ {
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if s := band[(seg+off)%6]; s != pixel.Info {
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g.VLine(x, 3*seg, min(3, pool-3*seg), s)
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}
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}
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}
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// Foam churns where it lands; ripples run outward.
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g.Rect(0, pool, g.W, g.H-pool, pixel.Info)
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g.Veil(l-3, pool, r-l+6, 3, light(k), 6+4*wrap(step, 2))
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for i := range 2 {
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d := wrap(step/2+4*i, 8)
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g.HLine(l-6-2*d, pool+4+2*i, 3, light(k))
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g.HLine(r+3+2*d, pool+4+2*i, 3, light(k))
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}
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}
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