From 5f61346e8f05917ca28cd68565d87c025f328f74 Mon Sep 17 00:00:00 2001
From: Stephan Stahl <esteel@eos.franken.de>
Date: Sun, 11 Apr 2010 19:25:50 +0000
Subject: [PATCH] more work on the menu animation framework, keyframes are now
 more easy to use

---
 qcsrc/menu/anim/keyframe.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/qcsrc/menu/anim/keyframe.c b/qcsrc/menu/anim/keyframe.c
index 39e1fd8b4..d32f19618 100644
--- a/qcsrc/menu/anim/keyframe.c
+++ b/qcsrc/menu/anim/keyframe.c
@@ -1,5 +1,6 @@
 #ifdef INTERFACE
 CLASS(Keyframe) EXTENDS(Animation)
+	METHOD(Keyframe, addEasing, entity(entity, float, float, float(float, float, float, float)))
 	METHOD(Keyframe, addAnim, void(entity, entity))
 	METHOD(Keyframe, calcValue, float(entity, float, float, float, float))
 	ATTRIB(Keyframe, currentChild, entity, NULL)
@@ -8,6 +9,9 @@ CLASS(Keyframe) EXTENDS(Animation)
 ENDCLASS(Animation)
 entity makeHostedKeyframe(entity, void(entity, float), float, float, float);
 entity makeKeyframe(entity, void(entity, float), float, float, float);
+float getNewChildStart(entity);
+float getNewChildDuration(entity, float);
+float getNewChildValue(entity);
 #endif
 
 #ifdef IMPLEMENTATION
@@ -27,6 +31,40 @@ entity makeKeyframe(entity obj, void(entity, float) setter, float duration, floa
 	return me;
 }
 
+entity addEasingKeyframe(entity me, float durationTime, float end, float(float, float, float, float) func)
+{
+	entity other;
+	other = makeEasing(me.object, me.setter, func, getNewChildStart(me), getNewChildDuration(me, durationTime), getNewChildValue(me), end);
+	me.addAnim(me, other);
+	return other;
+}
+
+float getNewChildStart(entity me)
+{
+	if (me.lastChild)
+		return (me.lastChild.startTime + me.lastChild.duration);
+	else
+		return 0;
+}
+
+float getNewChildDuration(entity me, float durationTime)
+{
+	float dura, maxDura;
+	maxDura = me.duration;
+	if (me.lastChild) maxDura = maxDura - (me.lastChild.startTime + me.lastChild.duration);
+	dura = durationTime;
+	if (0 >= dura || dura > maxDura) dura = maxDura;
+	return dura;
+}
+
+float getNewChildValue(entity me)
+{
+	if (me.lastChild)
+		return (me.lastChild.startValue + me.lastChild.delta);
+	else
+		return me.startValue;
+}
+
 void addAnimKeyframe(entity me, entity other)
 {
 	if(other.parent)
-- 
2.39.2