forked from Mirrors/openclonk
71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/**
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Fade.c
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Function to fade in and out objects.
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@author
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*/
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global func FadeOut(int time, bool del)
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{
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// If there is an existing effect, remove it.
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if (GetEffect("ObjFade", this))
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RemoveEffect("ObjFade", this);
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// Add the effect itself.
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var effect = AddEffect("ObjFade", this, 1, 1);
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effect.fade_time = time;
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effect.fade_out = true;
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// Delete the object when fade-out is done.
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effect.delete = del;
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return effect;
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}
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global func FadeIn(int time)
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{
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// If there is an existing effect, remove it.
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if (GetEffect("ObjFade", this))
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RemoveEffect("ObjFade", this);
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// Add the effect itself.
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var effect = AddEffect("ObjFade", this, 1, 1);
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effect.fade_time = time;
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return effect;
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}
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global func FxObjFadeTimer(object target, proplist effect, int timer)
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{
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// Is the fade timer up?
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if (timer >= effect.fade_time)
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{
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// Delete object at end if specified.
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if (effect.delete)
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target->RemoveObject();
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else
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{
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if (effect.fade_out)
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{
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// Callback to object when alpha is completely transparent.
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target->~OnFadeDisappear();
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target->SetObjAlpha(0);
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}
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else
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{
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// Callback to object when alpha is fully opaque.
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target->~OnFadeAppear();
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target->SetObjAlpha(255);
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}
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}
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return FX_Execute_Kill;
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}
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// Find out what the alpha should be.
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var alpha = (timer * 1000 / effect.fade_time) * 255 / 1000;
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// Does the object fade out or in?
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if (effect.fade_out)
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alpha = 255 - alpha;
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// Shade object's alpha to match time.
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target->SetObjAlpha(alpha);
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return FX_OK;
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} |