Fix #21 by checking animation history

Former-commit-id: 5272d1d7aee73fc07edeb31d9f29238d19b7d229

client/src/lib.rs

@@ -168,8 +168,12 @@ impl Client {
         }
 
         // Update the server about the player's currently playing animation
-        if let Some(animation) = self.state.read_storage().get(self.player).cloned() {
-            self.postbox.send_message(ClientMsg::PlayerAnimation(animation));
+        if let Some(animationHistory) = self.state.read_storage::<comp::AnimationHistory>().get(self.player).cloned() {
+            if let Some(last) = animationHistory.last {
+                if animationHistory.current != last {
+                    self.postbox.send_message(ClientMsg::PlayerAnimation(animationHistory));
+                }
+            }
         }
 
         // Request chunks from the server
@@ -228,9 +232,9 @@ impl Client {
                         },
                         None => {},
                     },
-                    ServerMsg::EntityAnimation { entity, animation } => match self.state.ecs().entity_from_uid(entity) {
+                    ServerMsg::EntityAnimation { entity, animationHistory } => match self.state.ecs().entity_from_uid(entity) {
                         Some(entity) => {
-                            self.state.write_component(entity, animation);
+                            self.state.write_component(entity, animationHistory);
                         },
                         None => {},
                     },

common/src/comp/character.rs

@@ -19,6 +19,12 @@ pub enum Gender {
 }
 
 #[derive(Copy, Clone, Debug, Serialize, Deserialize)]
+pub struct AnimationHistory {
+    pub last: Option<Animation>,
+    pub current: Animation,
+}
+
+#[derive(Copy, Clone, Debug, PartialEq, Serialize, Deserialize)]
 pub enum Animation {
     Idle,
     Run,
@@ -55,6 +61,6 @@ impl Component for Character {
     type Storage = FlaggedStorage<Self, VecStorage<Self>>;
 }
 
-impl Component for Animation {
+impl Component for AnimationHistory {
     type Storage = FlaggedStorage<Self, VecStorage<Self>>;
 }

common/src/comp/mod.rs

@@ -7,4 +7,5 @@ pub mod phys;
 pub use agent::{Agent, Control};
 pub use character::Character;
 pub use player::Player;
+pub use character::AnimationHistory;
 pub use character::Animation;

common/src/msg/client.rs

@@ -11,7 +11,7 @@ pub enum ClientMsg {
     Ping,
     Pong,
     Chat(String),
-    PlayerAnimation(comp::character::Animation),
+    PlayerAnimation(comp::character::AnimationHistory),
     PlayerPhysics {
         pos: comp::phys::Pos,
         vel: comp::phys::Vel,

common/src/msg/server.rs

@@ -25,7 +25,7 @@ pub enum ServerMsg {
     },
     EntityAnimation {
         entity: u64,
-        animation: comp::Animation,
+        animationHistory: comp::AnimationHistory,
     },
     TerrainChunkUpdate {
         key: Vec3<i32>,

common/src/state.rs

@@ -100,7 +100,7 @@ impl State {
         ecs.internal_mut().register::<comp::phys::Pos>();
         ecs.internal_mut().register::<comp::phys::Vel>();
         ecs.internal_mut().register::<comp::phys::Dir>();
-        ecs.internal_mut().register::<comp::Animation>();
+        ecs.internal_mut().register::<comp::AnimationHistory>();
         ecs.internal_mut().register::<comp::Agent>();
         ecs.internal_mut().register::<comp::Control>();
 

common/src/sys/control.rs

@@ -3,7 +3,7 @@ use specs::{Join, Read, ReadStorage, System, WriteStorage, Entities};
 use vek::*;
 
 // Crate
-use crate::comp::{Control, Animation, phys::{Pos, Vel, Dir}};
+use crate::comp::{Control, Animation, AnimationHistory, phys::{Pos, Vel, Dir}};
 
 // Basic ECS AI agent system
 pub struct Sys;
@@ -13,7 +13,7 @@ impl<'a> System<'a> for Sys {
         Entities<'a>,
         WriteStorage<'a, Vel>,
         WriteStorage<'a, Dir>,
-        WriteStorage<'a, Animation>,
+        WriteStorage<'a, AnimationHistory>,
         ReadStorage<'a, Control>,
     );
 
@@ -23,12 +23,20 @@ impl<'a> System<'a> for Sys {
             // Apply physics to the player: acceleration and non-linear decceleration
             vel.0 += control.move_dir * 2.0 - vel.0.map(|e| e * e.abs() + e) * 0.03;
 
+            let animation =
                 if control.move_dir.magnitude() > 0.01 {
                     dir.0 = vel.0.normalized() * Vec3::new(1.0, 1.0, 0.0);
-                anims.insert(entity, Animation::Run);
+                    Animation::Run
                 } else {
-                anims.insert(entity, Animation::Idle);
-            }
+                    Animation::Idle
+                };
+
+            let lastAnimation = anims.get_mut(entity).map(|h| h.current);
+
+            anims.insert(entity, AnimationHistory {
+                last: lastAnimation, 
+                current: animation,
+            });
         }
     }
 }

server/src/lib.rs

@@ -266,7 +266,7 @@ impl Server {
                             ClientMsg::Ping => client.postbox.send_message(ServerMsg::Pong),
                             ClientMsg::Pong => {}
                             ClientMsg::Chat(msg) => new_chat_msgs.push((entity, msg)),
-                            ClientMsg::PlayerAnimation(animation) => state.write_component(entity, animation),
+                            ClientMsg::PlayerAnimation(animationHistory) => state.write_component(entity, animationHistory),
                             ClientMsg::PlayerPhysics { pos, vel, dir } => {
                                 state.write_component(entity, pos);
                                 state.write_component(entity, vel);
@@ -369,16 +369,32 @@ impl Server {
         }
 
         // Sync animation states
-        for (entity, &uid, &animation) in (
+        for (entity, &uid, &animationHistory) in (
             &self.state.ecs().internal().entities(),
             &self.state.ecs().internal().read_storage::<Uid>(),
-            &self.state.ecs().internal().read_storage::<comp::Animation>(),
+            &self.state.ecs().internal().read_storage::<comp::AnimationHistory>(),
         ).join() {
+            if let Some(last) = animationHistory.last {
+                if animationHistory.current == last {
+                    continue;
+                }
+
                 self.clients.notify_connected_except(entity, ServerMsg::EntityAnimation {
                     entity: uid.into(),
-                animation,
+                    animationHistory,
                 });
             }
+        }
+
+        // Update animation last/current state
+        for (entity, mut animationHistory) in (
+            &self.state.ecs().internal().entities(),
+            &mut self.state.ecs().internal().write_storage::<comp::AnimationHistory>()
+        ).join() {
+            animationHistory.last = None;
+            let mut new = animationHistory.clone();
+            new.last = Some(new.current);
+        }
 
         // Remove all force flags
         self.state.ecs_mut().internal_mut().write_storage::<comp::phys::ForceUpdate>().clear();

voxygen/src/scene/figure.rs

@@ -83,18 +83,18 @@ impl Figures {
     pub fn maintain(&mut self, renderer: &mut Renderer, client: &mut Client) {
         let time = client.state().get_time();
         let ecs = client.state_mut().ecs_mut().internal_mut();
-        for (entity, pos, dir, character, animation) in (
+        for (entity, pos, dir, character, animationHistory) in (
             &ecs.entities(),
             &ecs.read_storage::<comp::phys::Pos>(),
             &ecs.read_storage::<comp::phys::Dir>(),
             &ecs.read_storage::<comp::Character>(),
-            &ecs.read_storage::<comp::Animation>(),
+            &ecs.read_storage::<comp::AnimationHistory>(),
         ).join() {
             let state = self.states
                 .entry(entity)
                 .or_insert_with(|| FigureState::new(renderer, CharacterSkeleton::new()));
 
-            let target_skeleton = match animation {
+            let target_skeleton = match animationHistory.current {
                 comp::character::Animation::Idle => IdleAnimation::update_skeleton(&mut state.skeleton, time),
                 comp::character::Animation::Run => RunAnimation::update_skeleton(&mut state.skeleton, time),
             };