81 lines
1.5 KiB
GDScript
81 lines
1.5 KiB
GDScript
class_name TransitionSingleton extends Control
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enum FadeType {
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NONE,
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FADE_IN,
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FADE_OUT
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}
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signal fadeOutStart
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signal fadeOutEnd
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signal fadeInStart
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signal fadeInEnd
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signal fadeUpdate(t:float)
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var fadeType:FadeType = FadeType.NONE
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var fadeDuration:float = 0.4
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var fadeTime:float = 0.0
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var inFade = false
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func _enter_tree() -> void:
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$Overlay.visible = false
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func _process(delta: float) -> void:
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if fadeType == FadeType.NONE:
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return
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fadeTime += delta
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var t:float = fadeTime / fadeDuration
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# Get destination alpha type.
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var destAlpha:float = 0.0
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var srcAlpha:float
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if fadeType == FadeType.FADE_IN:
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srcAlpha = 1.0
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destAlpha = 0.0
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elif fadeType == FadeType.FADE_OUT:
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srcAlpha = 0.0
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destAlpha = 1.0
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# End?
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if t >= 1.0:
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fadeUpdate.emit(1.0)
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var cFade = fadeType
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fadeType = FadeType.NONE
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$Overlay.color.a = destAlpha
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inFade = false
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if cFade == FadeType.FADE_OUT:
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fadeOutEnd.emit()
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elif cFade == FadeType.FADE_IN:
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fadeInEnd.emit()
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return
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# TODO: Use curves
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$Overlay.color.a = srcAlpha + (destAlpha - srcAlpha) * t
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fadeUpdate.emit(t)
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pass
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func fade(
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fade:FadeType = FadeType.FADE_IN,
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duration:float = 0.4,
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color:Color = Color(0, 0, 0, 1),
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):
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if inFade:
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push_error("Transition: Cannot start a new fade while another is in progress.")
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return
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$Overlay.visible = true
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$Overlay.color = color
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fadeDuration = duration
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fadeTime = 0
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fadeType = fade
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inFade = true
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if fade == FadeType.FADE_IN:
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fadeInStart.emit()
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$Overlay.color.a = 0
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elif fade == FadeType.FADE_OUT:
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fadeOutStart.emit()
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$Overlay.color.a = 1 |