45 lines
1.2 KiB
Go
45 lines
1.2 KiB
Go
package native
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import "aego/sdk"
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type Spinner struct {
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Speed float32 `aego:"speed,unit=rad/s"`
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Spins int64 `aego:"spins,readonly"`
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}
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type spinnerSystem struct{}
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func (spinnerSystem) Run(ctx *sdk.Context) {
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s := sdk.SceneOf(ctx)
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if s == nil {
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return
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}
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dt := float32(ctx.Dt)
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sdk.Query1[Spinner](s).Each(func(n sdk.NodeHandle, sp *Spinner) {
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before := s.Local(n).Rotation
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after := before + sp.Speed*dt
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s.SetRotation(n, after)
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if int64(after/6.2831855) != int64(before/6.2831855) {
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sp.Spins++
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}
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})
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}
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func registerSpinner(r *sdk.Registry) error {
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r.System(sdk.SystemDesc{ID: "rotator.spinner", Phase: sdk.PhaseUpdate, System: spinnerSystem{}})
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return sdk.Component[Spinner](r, sdk.Name("game.Spinner")).
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Category("Game").
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Icon("cat.game").
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Default(func() Spinner { return Spinner{Speed: 2} }).
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Requires("engine.SpriteRenderer").
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Script("Speed").
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Proc0("Reset", func(_ *sdk.ScriptCtx, sp *Spinner) { sp.Spins = 0 },
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sdk.ScriptDoc("Reset clears the spin counter of the node's Spinner.")).
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Template("Spinner", func(s *sdk.Scene, h sdk.NodeHandle) {
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if sr, ok := sdk.Get[sdk.SpriteRenderer](s, h); ok {
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sr.Size = sdk.Vec2{X: 1, Y: 1}
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}
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}).
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Err()
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}
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