implement animations

src/animations.rs

@@ -1,20 +1,24 @@
 use std::collections::HashMap;
 use std::time::Duration;
 
-pub type BlockOffsets = HashMap<usize, (i32, i32)>;
+use crate::enums::Board;
+use crate::level::{ChangeSet, Entity, FailSet};
+
+pub type MoveResult = Result<ChangeSet, FailSet>;
+pub type BlockOffsets = HashMap<Entity, (f32, f32)>;
 
 // TODO: don't yeet around a HashMap all the time
-pub type AnimationFn = Box<Fn(BlockOffsets, f32) -> BlockOffsets>;
+pub type AnimationFn = Box<Fn(MoveResult, BlockOffsets, f32) -> BlockOffsets>;
 
+// in seconds
 const ANIMATION_DURATION: f32 = 1.0 / 6.0;
 
-#[derive(Default, Serialize)]
+#[derive(Default)]
 pub struct AnimationState {
     pub is_animating: bool,
-    pub last_move_success: bool,
+    pub last_move_result: Option<MoveResult>,
     pub progress: f32,
     pub block_offsets: BlockOffsets,
-    #[serde(skip)]
     progress_function: Option<AnimationFn>,
 }
 
@@ -22,13 +26,46 @@ impl AnimationState {
     pub fn new() -> Self {
         AnimationState {
             is_animating: false,
-            last_move_success: true,
+            last_move_result: None,
             progress: 0.0,
             block_offsets: BlockOffsets::new(),
             progress_function: None,
         }
     }
 
+    pub fn begin_move_transition(&mut self, result: MoveResult) {
+        self.last_move_result = Some(result);
+        self.is_animating = true;
+        self.progress = 0.0;
+        let func = |last_move_result: MoveResult, mut offsets: BlockOffsets, progress: f32| {
+            use std::f32::consts::PI;
+            match last_move_result {
+                // transition
+                Ok(change_set) => {
+                    for (entity, direction) in change_set {
+                        // TODO: implement ease-out?
+                        let pair = direction.as_pair();
+                        let offset = (pair.0 as f32 * progress, pair.1 as f32 * progress);
+                        println!(
+                            "|| entity: {:?}, direction: {:?} => {:?}",
+                            entity, direction, offset
+                        );
+                        offsets.insert(entity.clone(), offset);
+                    }
+                }
+                // vibrate all blocking pieces
+                Err(fail_set) => {
+                    for index in fail_set {
+                        let delta = 0.05 * (4.0 * PI * progress).sin() / (progress + 0.5);
+                        offsets.insert(Entity::Block(index), (delta, delta));
+                    }
+                }
+            }
+            offsets
+        };
+        self.progress_function = Some(Box::new(func));
+    }
+
     pub fn begin_transition(&mut self, f: AnimationFn) {
         self.is_animating = true;
         self.progress = 0.0;
@@ -36,26 +73,45 @@ impl AnimationState {
     }
 
     pub fn make_progress(&mut self, delta: Duration) {
-        let progress = self.progress + delta.as_millis() as f32 / 1000.0;
+        let progress = self.progress + (delta.as_millis() as f32 / ANIMATION_DURATION) / 1000.0;
+
         let block_offsets = if let Some(f) = &self.progress_function {
-            Some(f(self.block_offsets.clone(), progress))
+            Some(f(
+                self.last_move_result.clone().unwrap(),
+                self.block_offsets.clone(),
+                progress,
+            ))
         } else {
             None
         };
+
+        // this should always work
         if let Some(block_offsets) = block_offsets {
             self.block_offsets = block_offsets;
             self.progress = progress;
         }
+
+        if self.progress > 1.0 {
+            self.is_animating = false;
+            self.block_offsets = BlockOffsets::new();
+        }
     }
 
     pub fn is_done(&self) -> bool {
         self.progress > 1.0
     }
 
-    pub fn get_offset(&self, index: usize) -> (i32, i32) {
+    pub fn get_block_offset(&self, index: usize) -> (f32, f32) {
         self.block_offsets
-            .get(&index)
+            .get(&Entity::Block(index))
             .cloned()
-            .unwrap_or_else(|| (0, 0))
+            .unwrap_or_else(|| (0.0, 0.0))
+    }
+
+    pub fn get_player_offset(&self, board: Board) -> (f32, f32) {
+        self.block_offsets
+            .get(&Entity::Player(board))
+            .cloned()
+            .unwrap_or_else(|| (0.0, 0.0))
     }
 }

src/game.rs

@@ -100,18 +100,29 @@ impl<'a> Game<'a> {
                     println!("pushed: {:?}", $key);
                     let level = self.get_current_level_mut();
                     let result = level.try_move($board, $direction);
-                    println!("game result: {:?}", result);
+                    self.animations.begin_move_transition(result);
                     self.keymap.insert($key, false);
                 }
             };
         }
 
         if self.animations.is_animating {
-            if self.animations.last_move_success {
+            println!("animating. {:?}", self.animations.progress);
-                if self.animations.is_done() {
             self.animations.make_progress(delta);
-                }
+
+            // we just finished!
+            if !self.animations.is_animating {
+                // apply the changes to the entities
+                // this indirection is used to dodge a concurrent borrow
+                let change_set = if let Some(Ok(change_set)) = &self.animations.last_move_result {
+                    Some(change_set.clone())
                 } else {
+                    None
+                };
+                if let Some(change_set) = change_set {
+                    let level = self.get_current_level_mut();
+                    level.apply_change_set(change_set.clone());
+                }
             }
         } else {
             shit!(VirtualKeyCode::W, Board::Left, PushDir::Up);
@@ -125,13 +136,7 @@ impl<'a> Game<'a> {
             shit!(VirtualKeyCode::L, Board::Right, PushDir::Right);
 
             // failed a move
-            if !self.animations.last_move_success {
+            if let Some(Err(fail_set)) = &self.animations.last_move_result {}
-                let func = |mut offsets: HashMap<_, _>, prog| {
-                    offsets.insert(0, (0, 0));
-                    offsets
-                };
-                self.animations.begin_transition(Box::new(func));
-            }
         }
     }
 

src/level/mod.rs

@@ -96,15 +96,7 @@ impl Level {
         }
     }
 
-    pub fn try_move(&mut self, board: Board, direction: PushDir) {
+    pub fn apply_change_set(&mut self, change_set: ChangeSet) {
-        let mut change_set = ChangeSet::default();
-        change_set.insert(Entity::Player(board), direction);
-
-        let result = self.player_can_move(board, direction, change_set);
-
-        match result {
-            Ok(change_set) => {
-                println!("change_set: {:?}", change_set);
         for (entity, direction) in change_set {
             let direction = direction.as_pair();
             match entity {
@@ -126,8 +118,11 @@ impl Level {
             }
         }
     }
-            Err(fail_set) => {}
+
-        };
+    pub fn try_move(&mut self, board: Board, direction: PushDir) -> Result<ChangeSet, FailSet> {
+        let mut change_set = ChangeSet::default();
+        change_set.insert(Entity::Player(board), direction);
+        self.player_can_move(board, direction, change_set)
     }
 
     fn player_can_move(
@@ -369,9 +364,9 @@ impl Level {
                     offset.0 + segment.position.0 * scale,
                     offset.1 + segment.position.1 * scale,
                 );
-                let animation_offset = animations.get_offset(i);
+                let animation_offset = animations.get_block_offset(i);
-                location.0 += animation_offset.0;
+                location.0 += (animation_offset.0 * scale as f32) as i32;
-                location.1 += animation_offset.1;
+                location.1 += (animation_offset.1 * scale as f32) as i32;
                 renderer.render_segment(
                     location,
                     scale,
@@ -383,21 +378,40 @@ impl Level {
         }
 
         // render player
-        self.render_player(renderer, &self.player1, scale, left_off);
+        self.render_player(
-        self.render_player(renderer, &self.player2, scale, right_off);
+            renderer,
+            Board::Left,
+            &self.player1,
+            scale,
+            animations,
+            left_off,
+        );
+        self.render_player(
+            renderer,
+            Board::Right,
+            &self.player2,
+            scale,
+            animations,
+            right_off,
+        );
     }
 
     fn render_player(
         &self,
         renderer: &mut Renderer,
+        board: Board,
         player: &Player,
         scale: i32,
+        animations: &AnimationState,
         offset: (i32, i32),
     ) {
-        let location = (
+        let mut location = (
             offset.0 + player.position.0 * scale + 4,
             offset.1 + player.position.1 * scale + 4,
         );
+        let animation_offset = animations.get_player_offset(board);
+        location.0 += (animation_offset.0 * scale as f32) as i32;
+        location.1 += (animation_offset.1 * scale as f32) as i32;
         renderer.render_segment(
             location,
             (scale - 8),