101 lines
1.9 KiB
Odin
101 lines
1.9 KiB
Odin
package ntween
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import "base:intrinsics"
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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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Tween :: struct($T: typeid) where intrinsics.type_is_float(T) || intrinsics.type_is_array(T) {
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value: ^T,
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from: T,
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to: T,
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time: f32,
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duration: f32,
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ease_type: ease.Ease,
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active: bool,
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finished: proc(data: rawptr),
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data: rawptr,
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}
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Tween_Map :: struct($T: typeid) {
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values: map[^T]Tween(T),
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}
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init :: proc(
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$T: typeid,
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capacity := 8,
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) -> Tween_Map(T) where intrinsics.type_is_float(T) ||
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intrinsics.type_is_array(T) {
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return {values = make_map_cap(map[^T]Tween(T), capacity)}
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}
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clear_tweens :: proc(tweens: ^Tween_Map($T)) {
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clear(&tweens.values)
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}
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destroy_tweens :: proc(tweens: ^Tween_Map($T)) {
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delete_map(tweens.values)
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}
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animate :: proc(
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tweens: ^Tween_Map($T),
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value: ^T,
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to: T,
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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(T) {
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tween: ^Tween(T)
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if t, ok := &tweens.values[value]; ok {
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tween = t
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} else {
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tweens.values[value] = {}
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tween = &tweens.values[value]
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}
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tween^ = {
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value = value,
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from = value^,
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to = to,
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duration = duration,
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ease_type = ease,
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active = true,
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data = data,
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finished = callback,
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}
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return tween
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}
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cancel :: proc(t: ^Tween($T)) {
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t.active = false
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}
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process :: proc(tweens: ^Tween_Map($T), delta: f32) {
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for i, &tween in tweens.values {
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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.value != nil {
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tween.value^ = 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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delete_key(&tweens.values, tween.value)
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}
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}
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}
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