From 27327ff6c3ad482823432b55084026c84cf79175 Mon Sep 17 00:00:00 2001
From: Glenn Maynard <gmaynard@users.sourceforge.net>
Date: Mon, 23 Jan 2006 05:49:22 +0000
Subject: [PATCH] ease, bouncebegin, bounceend

---
 stepmania/Themes/default/Scripts/Actor.lua | 52 ++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/stepmania/Themes/default/Scripts/Actor.lua b/stepmania/Themes/default/Scripts/Actor.lua
index c638f2945d..89b676cc74 100644
--- a/stepmania/Themes/default/Scripts/Actor.lua
+++ b/stepmania/Themes/default/Scripts/Actor.lua
@@ -1,3 +1,55 @@
+function Actor:ease(t, fEase)
+	-- Optimizations:
+	-- fEase = -100 is equivalent to TweenAccelerate.
+	if fEase == -100 then
+		self:accelerate(t);
+		return;
+	end
+
+	-- fEase = 0 is equivalent to TweenLinear.
+	if fEase == 0 then
+		self:linear(t);
+		return;
+	end
+
+	-- fEase = +100 is equivalent to TweenDecelerate.
+	if fEase == 100 then
+		self:decelerate(t);
+		return;
+	end
+
+	self:tween( t, TweenBezier,
+		{
+			0,
+			scale(fEase, -100, 100, 0/3, 2/3),
+			scale(fEase, -100, 100, 1/3, 3/3),
+			1
+		}
+	);
+end
+
+local BounceBeginBezier =
+{
+	0, 0,
+	0.42, -0.42,
+	2/3, 0.3,
+	1, 1
+}
+function Actor:bouncebegin(t)
+	self:tween( t, TweenBezier, BounceBeginBezier );
+end
+
+local BounceEndBezier =
+{
+	0,0,
+	1/3, 0.7,
+	0.58, 1.42,
+	1, 1
+}
+function Actor:bounceend(t)
+	self:tween( t, TweenBezier, BounceEndBezier );
+end
+
 -- Hide if b is true, but don't unhide if b is false.
 function Actor:hide_if(b)
 	if b then