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.
45 lines
1.0 KiB
Go
45 lines
1.0 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 RainOptions struct {
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// Width and Height are dots; zeros mean 160 by 96.
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Width, Height int
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Label string
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}
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// Rain slants streaks down; each splashes as it lands.
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func Rain(c *ui.Context, o RainOptions) *ui.Element {
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k := pixel.K(c)
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w, h := size("Rain", o.Width, o.Height, 160, 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() { rain(g, k, g.Step(12)) })
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})
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}
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// rain drops fall three rows, a dot left, each step.
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func rain(g pixel.Canvas, k pixel.Kit, step int) {
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s := pick(k, pixel.Faint, pixel.Info)
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fall := (g.H+4)/3 + 1
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for i := range g.W * g.H / 160 {
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p := wrap(step+rnd(i, 30), fall+3)
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x := wrap(rnd(i, 31)-p, g.W)
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switch {
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case p < fall:
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y := 3*p - 4
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g.Line(x+1, y, x, y+3, s)
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case p == fall:
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g.Dot(x-1, g.H-2, s)
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g.Dot(x+1, g.H-2, s)
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case p == fall+1:
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g.Dot(x-2, g.H-3, s)
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g.Dot(x+2, g.H-3, s)
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}
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}
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}
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