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.
36 lines
1014 B
Go
36 lines
1014 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 AuroraOptions 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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// Aurora hangs curtains whose slots slide sideways.
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func Aurora(c *ui.Context, o AuroraOptions) *ui.Element {
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k := pixel.K(c)
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w, h := size("Aurora", 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() { aurora(g, g.Step(8)) })
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})
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}
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// aurora's columns ripple on top and fade at the hem.
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func aurora(g pixel.Canvas, step int) {
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band := pixel.Cycle([]pixel.Slot{pixel.Good, pixel.Info, pixel.Magic, pixel.Good, pixel.AccentLit}, step)
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for x := range g.W {
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top := g.H/8 + tri(x/2+step, 64, g.H/6) + tri(x+2*step, 36, 3)
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long := g.H/4 + tri(3*x/2-step, 50, g.H/6)
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s := band[x/4%len(band)]
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g.VLine(x, top, long*2/3, s)
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g.Veil(x, top+long*2/3, 1, long/3, s, 6)
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}
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}
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