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.
32 lines
827 B
Go
32 lines
827 B
Go
package fx
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import (
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"fmt"
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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 PaletteCycleOptions struct {
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// FPS is steps a second; zero means 8.
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FPS int
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// Slot inks the sprite's # dots.
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Slot pixel.Slot
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Scale int
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Label string
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}
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// PaletteCycle draws sp, rotating band's slots one place a step.
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func PaletteCycle(c *ui.Context, sp *pixel.Sprite, band []pixel.Slot, o PaletteCycleOptions) *ui.Element {
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k := pixel.K(c)
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fps, sc := pixel.Or("PaletteCycle FPS", o.FPS, 8), scale("PaletteCycle", o.Scale, 1)
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if len(band) < 2 {
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panic(fmt.Sprintf("fx: PaletteCycle band %v needs two slots", band))
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}
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return box(c, k, o.Label, sp.W*sc, sp.H*sc).Draw(func(p *ui.Painter, r ui.Rect) {
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g := k.Canvas(p, r)
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g.Cycled(band, g.Step(fps)).Sprite(0, 0, sp, 0, o.Slot, sc)
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})
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}
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