From 42c1534d95e1551c37e64a1dae288e8b75e8d8ba Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 2 Jul 2018 01:10:41 +0300
Subject: [PATCH] Add a speed parameter for animation playback

---
 source/animationplayer.cpp | 27 ++++++++++++++-------------
 source/animationplayer.h   | 13 +++++++------
 2 files changed, 21 insertions(+), 19 deletions(-)

diff --git a/source/animationplayer.cpp b/source/animationplayer.cpp
index 13bd7af0..cbcb6b59 100644
--- a/source/animationplayer.cpp
+++ b/source/animationplayer.cpp
@@ -18,7 +18,7 @@ AnimationPlayer::Target &AnimationPlayer::get_slot(Placeable &obj)
 	return objects.insert(ObjectMap::value_type(&obj, Target(obj))).first->second;
 }
 
-AnimationPlayer::Target &AnimationPlayer::play_(Placeable &obj, const Animation &anim, bool stacked)
+AnimationPlayer::Target &AnimationPlayer::play_(Placeable &obj, const Animation &anim, bool stacked, float speed)
 {
 	Target &target = get_slot(obj);
 	if(!stacked)
@@ -31,30 +31,30 @@ AnimationPlayer::Target &AnimationPlayer::play_(Placeable &obj, const Animation
 	target.stacked = stacked;
 	// TODO check for incompatible armature
 	target.armature = anim.get_armature();
-	target.animations.push_back(PlayingAnimation(anim));
+	target.animations.push_back(PlayingAnimation(anim, speed));
 	return target;
 }
 
-void AnimationPlayer::play(AnimatedObject &obj, const Animation &anim)
+void AnimationPlayer::play(AnimatedObject &obj, const Animation &anim, float speed)
 {
-	Target &target = play_(obj, anim, false);
+	Target &target = play_(obj, anim, false, speed);
 	target.object = &obj;
 }
 
-void AnimationPlayer::play(Placeable &obj, const Animation &anim)
+void AnimationPlayer::play(Placeable &obj, const Animation &anim, float speed)
 {
-	play_(obj, anim, false);
+	play_(obj, anim, false, speed);
 }
 
-void AnimationPlayer::play_stacked(AnimatedObject &obj, const Animation &anim)
+void AnimationPlayer::play_stacked(AnimatedObject &obj, const Animation &anim, float speed)
 {
-	Target &target = play_(obj, anim, true);
+	Target &target = play_(obj, anim, true, speed);
 	target.object = &obj;
 }
 
-void AnimationPlayer::play_stacked(Placeable &obj, const Animation &anim)
+void AnimationPlayer::play_stacked(Placeable &obj, const Animation &anim, float speed)
 {
-	play_(obj, anim, true);
+	play_(obj, anim, true, speed);
 }
 
 unsigned AnimationPlayer::get_n_active_animations(const AnimatedObject &obj) const
@@ -132,7 +132,7 @@ void AnimationPlayer::tick(const Time::TimeDelta &dt)
 void AnimationPlayer::tick_single(Target &target, const Time::TimeDelta &dt)
 {
 	PlayingAnimation &anim = target.animations.front();
-	anim.iterator += dt;
+	anim.iterator += dt*anim.speed;
 	target.placeable.set_matrix(anim.iterator.get_matrix());
 
 	if(target.object)
@@ -160,7 +160,7 @@ void AnimationPlayer::tick_stacked(Target &target, const Time::TimeDelta &dt)
 	Matrix matrix = target.base_matrix;
 	for(vector<PlayingAnimation>::iterator i=target.animations.begin(); i!=target.animations.end(); ++i)
 	{
-		i->iterator += dt;
+		i->iterator += dt*i->speed;
 		matrix *= i->iterator.get_matrix();
 
 		if(target.object)
@@ -216,8 +216,9 @@ void AnimationPlayer::set_object_uniform(AnimatedObject &obj, const string &name
 }
 
 
-AnimationPlayer::PlayingAnimation::PlayingAnimation(const Animation &a):
+AnimationPlayer::PlayingAnimation::PlayingAnimation(const Animation &a, float s):
 	animation(&a),
+	speed(s),
 	iterator(*animation)
 { }
 
diff --git a/source/animationplayer.h b/source/animationplayer.h
index 4158627d..b6575304 100644
--- a/source/animationplayer.h
+++ b/source/animationplayer.h
@@ -21,9 +21,10 @@ private:
 	struct PlayingAnimation
 	{
 		const Animation *animation;
+		float speed;
 		Animation::Iterator iterator;
 
-		PlayingAnimation(const Animation &);
+		PlayingAnimation(const Animation &, float);
 	};
 
 	struct Target: AnimationEventObserver
@@ -48,18 +49,18 @@ private:
 private:
 	Target &get_slot(Placeable &);
 
-	Target &play_(Placeable &, const Animation &, bool);
+	Target &play_(Placeable &, const Animation &, bool, float);
 public:
 	/// Plays an animation on an object.  Any previous animations are replaced.
-	void play(AnimatedObject &, const Animation &);
+	void play(AnimatedObject &, const Animation &, float = 1.0f);
 
-	void play(Placeable &, const Animation &);
+	void play(Placeable &, const Animation &, float = 1.0f);
 
 	/** Plays an animation, stacked with other animations.  If no animations are
 	playing yet, the object's current matrix is used as the base. */
-	void play_stacked(AnimatedObject &, const Animation &);
+	void play_stacked(AnimatedObject &, const Animation &, float = 1.0f);
 
-	void play_stacked(Placeable &, const Animation &);
+	void play_stacked(Placeable &, const Animation &, float = 1.0f);
 
 	/// Returns the number of animations currently affecting an object.
 	unsigned get_n_active_animations(const AnimatedObject &) const;
-- 
2.43.0