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// -----------------------------------------------------------------------------
// File: fader.ss
// Description: simple fader object (fade-in & fade-out)
// Author: Alexandre Martins <http://opensurge2d.org>
// License: MIT
// -----------------------------------------------------------------------------
using SurgeEngine.Transform;
using SurgeEngine.Vector2;
using SurgeEngine.Actor;
using SurgeEngine.Video.Screen;
//
// Fader is a transition effect used to fade the screen
//
// Functions:
// - fadeIn(): fade from black
// - fadeOut(): fade to black
//
// Properties:
// - fadeTime: number. Transition time, in seconds
//
// Example - how to use:
//
// object "FadeTest" is "entity" {
// fader = spawn("Fader");
//
// state "main" {
// fader.fadeIn();
// state = "wait";
// }
//
// state "wait" {
// if(timeout(fader.fadeTime + 2.0)) {
// fader.fadeOut();
// state = "done";
// }
// }
//
// state "done" { }
// }
//
object "Fader" is "entity", "detached", "awake", "private"
{
actor = Actor("Fade Effect");
transform = Transform();
fadeTime = 0.5; // seconds
state "main"
{
// setup
transform.position = Vector2.zero;
transform.localScale = Vector2(Screen.width / actor.width, Screen.height / actor.height);
state = "idle";
}
state "idle"
{
}
state "fade out"
{
actor.alpha += Time.delta / fadeTime;
if(actor.alpha >= 1.0) {
actor.alpha = 1.0;
state = "idle";
}
}
state "fade in"
{
actor.alpha -= Time.delta / fadeTime;
if(actor.alpha <= 0.0) {
actor.alpha = 0.0;
actor.visible = false;
state = "idle";
}
}
fun fadeOut()
{
actor.alpha = 0.0;
actor.visible = true;
state = "fade out";
}
fun fadeIn()
{
actor.alpha = 1.0;
actor.visible = true;
state = "fade in";
}
fun get_fadeTime()
{
return fadeTime;
}
fun set_fadeTime(seconds)
{
fadeTime = Math.max(seconds, 0.001);
}
fun setFadeTime(seconds)
{
this.set_fadeTime(seconds);
return this;
}
fun constructor()
{
actor.zindex = Math.infinity;
actor.visible = false;
}
}
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