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.
40 lines
943 B
Go
40 lines
943 B
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 DissolveOptions struct {
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// Slot replaces the dots; zero means the darkest slot.
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Slot pixel.Slot
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}
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// Dissolve switches content's dots to a slot in shuffled order.
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func Dissolve(c *ui.Context, covered bool, o DissolveOptions, content func()) *ui.Element {
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k := pixel.K(c)
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s := slotOr(o.Slot, dark(k))
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e := ui.Column(c)
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step := k.Toward(c, e, covered, 12, 8)
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return cover(k, e, func(g pixel.Canvas) { dissolve(g, s, step) }, content)
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}
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// dissolve covers dots whose fixed rank, 0–7, is below step.
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func dissolve(g pixel.Canvas, s pixel.Slot, step int) {
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on := func(x, y int) bool { return rnd(x+y<<16, 150)%8 < step }
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for y := range g.H {
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for x := 0; x < g.W; x++ {
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if !on(x, y) {
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continue
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}
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end := x + 1
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for end < g.W && on(end, y) {
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end++
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}
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g.HLine(x, y, end-x, s)
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x = end
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}
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}
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}
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