Enhance anim playback

src/game/meshinstance.cpp

@@ -65,7 +65,7 @@ void game::MeshInstance::UpdateBoneMatrices()
 	}
 }
 
-void game::MeshInstance::PlayAnim(const std::string& name)
+void game::MeshInstance::PlayAnim(const std::string& name, int flags)
 {
 	if (!IsSkeletal())
 	{
@@ -75,7 +75,9 @@ void game::MeshInstance::PlayAnim(const std::string& name)
 	const auto& skeleton = mesh_->GetSkeleton();
 
 	current_anim_ = skeleton->GetAnimation(name); // Can be nullptr
-	anim_time_ = 0.0f;
+	anim_start_ = *time_ptr_;
+	anim_flags_ = flags;
+	anim_done_ = false;
 }
 
 void game::MeshInstance::Update()
@@ -119,28 +121,42 @@ const gfx::UniformBuffer<glm::mat4>& game::MeshInstance::GetBoneUBO()
 
 void game::MeshInstance::ApplyAnimFrame()
 {
-	ApplySkelAnim(current_anim_, anim_time_, 1.0f);
+	if (!current_anim_)
+	{
+		return; // No animation to apply
 	}
 
-void game::MeshInstance::ApplySkelAnim(const assets::Animation* anim, float time, float weight)
+	float anim_time = *time_ptr_ - anim_start_;
+	float anim_duration = current_anim_->GetDuration();
+
+	if (!(anim_flags_ & ANIM_LOOP) && anim_time >= anim_duration)
 	{
-	float anim_frame = (*time_ptr_ - time) * anim->GetTPS();
+		anim_done_ = true;
+		anim_time = anim_duration;
+	}
+
+	ApplySkelAnim(*current_anim_, anim_time, 1.0f);
+}
+
+void game::MeshInstance::ApplySkelAnim(const assets::Animation& anim, float time, float weight)
+{
+	float anim_frame = time * anim.GetTPS();
 
 	if (anim_frame < 0.0f)
 	{
 		anim_frame = 0.0f;
 	}
 
-	size_t num_anim_frames = anim->GetNumFrames();
+	size_t num_anim_frames = anim.GetNumFrames();
 
 	size_t frame_i = static_cast<size_t>(anim_frame);
 	size_t frame0 = frame_i % num_anim_frames;
 	size_t frame1 = (frame_i + 1) % num_anim_frames;
 	float t = anim_frame - static_cast<float>(frame_i);
 
-	for (size_t i = 0; i < anim->GetNumChannels(); ++i)
+	for (size_t i = 0; i < anim.GetNumChannels(); ++i)
 	{
-		const assets::AnimationChannel& channel = anim->GetChannel(i);
+		const assets::AnimationChannel& channel = anim.GetChannel(i);
 		TransformNode& node = bone_nodes_[channel.bone_index];
 		
 		const Transform* t0 = channel.frames[frame0];

src/game/meshinstance.hpp

@@ -6,6 +6,11 @@
 
 namespace game
 {
+	enum PlayAnimFlags
+	{
+		ANIM_LOOP = 1 << 0,
+	};
+
 	class MeshInstance
 	{
 		std::shared_ptr<const assets::Mesh> mesh_;
@@ -20,14 +25,16 @@ namespace game
 		bool bone_ubo_dirty_ = true;
 
 		const assets::Animation* current_anim_ = nullptr;
-		float anim_time_ = 0.0f;
+		float anim_start_ = 0.0f;
+		int anim_flags_ = 0;
+		bool anim_done_ = false;
 
 	public:
 		MeshInstance(std::shared_ptr<const assets::Mesh> mesh, const TransformNode* root_node, const float* time_ptr);
 
 		bool IsSkeletal() const { return skeletal_; }
 
-		void PlayAnim(const std::string& name);
+		void PlayAnim(const std::string& name, int flags = 0);
 
 		void Update();
 
@@ -38,6 +45,8 @@ namespace game
 		const TransformNode& GetBoneNode(size_t index) const { return bone_nodes_[index]; }
 		const TransformNode* GetBoneNodeByName(const std::string& name) const;
 
+		bool AnimDone() const { return anim_done_; }
+
 	private:
 		void SetupBoneNodes();
 		void UpdateBoneMatrices();
@@ -47,7 +56,7 @@ namespace game
 		virtual void ApplyAnimFrame();
 
 	private:
-		void ApplySkelAnim(const assets::Animation* anim, float time, float weight);
+		void ApplySkelAnim(const assets::Animation& anim, float time, float weight);
 	};
 
 }