27 lines
823 B
Go
27 lines
823 B
Go
package feedback
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import (
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"math"
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"github.com/egoist/mygo/ui"
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"git.zacharyzhang.com/ZacharyZhang-NY/MujicaUI/internal"
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)
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// OrbitLoader moves a diamond around a ring of diamonds.
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func OrbitLoader(c *ui.Context, opts LoaderOptions) *ui.Element {
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return loaderMark(c, opts, "orbit_loader", 1, 1600, func(p *ui.Painter, r ui.Rect, t float64, col ui.Color, still bool) {
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cx, cy, rad := r.X+r.W/2, r.Y+r.H/2, r.W*0.36
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at := func(turn float64) (float32, float32) {
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a := 2*math.Pi*turn - math.Pi/2
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return internal.Snap(p, cx+rad*float32(math.Cos(a))), internal.Snap(p, cy+rad*float32(math.Sin(a)))
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}
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for i := range 8 {
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x, y := at(float64(i) / 8)
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p.FillPath(internal.Diamond(x, y, r.W*0.12), col.Alpha(0.3))
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}
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x, y := at(t)
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p.FillPath(internal.Diamond(x, y, internal.Snap(p, r.W*0.28)), col)
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})
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}
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