81 lines
1.3 KiB
Odin
81 lines
1.3 KiB
Odin
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package main
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import "core:math"
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import "core:math/ease"
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import "core:math/linalg"
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import "core:slice"
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Tween :: struct {
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ptr: ^f32,
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from: f32,
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to: f32,
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time: f32,
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duration: f32,
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ease_type: ease.Ease,
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active: bool,
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finished: proc(data: rawptr),
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data: rawptr
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}
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tweens : [dynamic]^Tween
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tween_clean :: proc() {
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for tween, i in tweens {
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free(tween)
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}
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}
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tween_to :: proc(
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value: ^f32, to: f32, duration: f32,
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ease: ease.Ease = ease.Ease.Quartic_In_Out,
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data: rawptr = nil,
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callback: proc(data: rawptr) = nil
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) -> ^Tween {
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tween := new(Tween)
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tween.ptr = value
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tween.from = value^
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tween.to = to
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tween.duration = duration
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tween.ease_type = ease
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tween.active = true
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tween.data = data
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tween.finished = callback
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append(&tweens, tween)
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return tween
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}
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tween_cancel :: proc(t: ^Tween) {
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t.active = false
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}
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tweens_process :: proc(delta: f32) {
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#reverse for tween, i in tweens {
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tween.time += delta
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p := clamp(tween.time / tween.duration, 0, 1)
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val := ease.ease(tween.ease_type, p)
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if tween.ptr != nil {
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tween.ptr^ = math.lerp(tween.from, tween.to, val)
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} else {
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tween.active = false
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}
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if tween.time >= tween.duration {
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tween.active = false
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if tween.finished != nil {
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tween.finished(tween.data)
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}
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}
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if !tween.active {
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free(tween)
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unordered_remove(&tweens, i)
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}
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}
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}
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