start implementing parkour

azalea/src/pathfinder/astar.rs

@@ -106,31 +106,28 @@ where
         }
     }
 
-    let best_path = determine_best_path(&best_paths, &heuristic);
+    let best_path = determine_best_path(&best_paths, &start);
 
     Path {
         movements: reconstruct_path(nodes, best_path),
         partial: true,
     }
 }
 
-const MIN_DISTANCE_PATH: f32 = 5.;
-
-fn determine_best_path<P, HeuristicFn>(best_node: &[P; 7], heuristic: &HeuristicFn) -> P
+fn determine_best_path<P>(best_paths: &[P; 7], start: &P) -> P
 where
-    HeuristicFn: Fn(P) -> f32,
     P: Eq + Hash + Copy + Debug,
 {
     // this basically makes sure we don't create a path that's really short
 
-    for node in best_node.iter() {
-        // square MIN_DISTANCE_PATH because we're comparing squared distances
-        if heuristic(*node) > MIN_DISTANCE_PATH * MIN_DISTANCE_PATH {
+    for node in best_paths.iter() {
+        if node != start {
+            println!("chose best node {:?}", node);
             return *node;
         }
     }
     warn!("No best node found, returning first node");
-    best_node[0]
+    best_paths[0]
 }
 
 fn reconstruct_path<P, M>(mut nodes: HashMap<P, Node<P, M>>, current: P) -> Vec<Movement<P, M>>

azalea/src/pathfinder/mod.rs

@@ -86,7 +86,7 @@ pub struct GotoEvent {
     pub entity: Entity,
     pub goal: Arc<dyn Goal + Send + Sync>,
     /// The function that's used for checking what moves are possible. Usually
-    /// `pathfinder::moves::basic::basic_move`
+    /// `pathfinder::moves::default_move`
     pub successors_fn: SuccessorsFn,
 }
 #[derive(Event)]
@@ -124,7 +124,7 @@ impl PathfinderClientExt for azalea_client::Client {
         self.ecs.lock().send_event(GotoEvent {
             entity: self.entity,
             goal: Arc::new(goal),
-            successors_fn: moves::basic::basic_move,
+            successors_fn: moves::default_move,
         });
     }
 }
@@ -370,7 +370,12 @@ fn tick_execute_path(
                     position: **position,
                     physics,
                 };
-                if (movement.data.is_reached)(is_reached_ctx) {
+                let on_ground_if_last = if i == pathfinder.path.len() - 1 {
+                    physics.on_ground
+                } else {
+                    true
+                };
+                if (movement.data.is_reached)(is_reached_ctx) && on_ground_if_last {
                     pathfinder.path = pathfinder.path.split_off(i + 1);
                     pathfinder.last_reached_node = Some(movement.target);
                     pathfinder.last_node_reached_at = Some(Instant::now());

azalea/src/pathfinder/moves/basic.rs

@@ -268,7 +268,8 @@ fn diagonal_move(world: &Instance, pos: BlockPos) -> Vec<Edge> {
         if !is_standable(&(pos + offset), world) {
             continue;
         }
-        let cost = SPRINT_ONE_BLOCK_COST * SQRT_2;
+        // +0.001 so it doesn't unnecessarily go diagonal sometimes
+        let cost = SPRINT_ONE_BLOCK_COST * SQRT_2 + 0.001;
 
         edges.push(Edge {
             movement: astar::Movement {

azalea/src/pathfinder/moves/mod.rs

@@ -1,4 +1,5 @@
 pub mod basic;
+pub mod parkour;
 
 use std::fmt::Debug;
 
@@ -114,6 +115,13 @@ pub struct IsReachedCtx<'a> {
     pub physics: &'a azalea_entity::Physics,
 }
 
+pub fn default_move(world: &Instance, node: BlockPos) -> Vec<Edge> {
+    let mut edges = Vec::new();
+    edges.extend(basic::basic_move(world, node));
+    edges.extend(parkour::parkour_move(world, node));
+    edges
+}
+
 /// Returns whether the entity is at the node and should start going to the
 /// next node.
 #[must_use]

azalea/src/pathfinder/moves/parkour.rs

@@ -0,0 +1,233 @@
+use azalea_client::{SprintDirection, StartSprintEvent, StartWalkEvent, WalkDirection};
+use azalea_core::{BlockPos, CardinalDirection};
+use azalea_world::Instance;
+
+use crate::{
+    pathfinder::{astar, costs::*},
+    JumpEvent, LookAtEvent,
+};
+
+use super::{
+    default_is_reached, is_block_passable, is_block_solid, is_passable, is_standable, Edge,
+    ExecuteCtx, MoveData,
+};
+
+pub fn parkour_move(world: &Instance, node: BlockPos) -> Vec<Edge> {
+    let mut edges = Vec::new();
+    edges.extend(parkour_forward_1_move(world, node));
+    edges.extend(parkour_headhitter_forward_1_move(world, node));
+    edges.extend(parkour_forward_2_move(world, node));
+    edges
+}
+
+fn parkour_forward_1_move(world: &Instance, pos: BlockPos) -> Vec<Edge> {
+    let mut edges = Vec::new();
+    for dir in CardinalDirection::iter() {
+        let gap_offset = BlockPos::new(dir.x() * 1, 0, dir.z() * 1);
+        let offset = BlockPos::new(dir.x() * 2, 0, dir.z() * 2);
+
+        if !is_standable(&(pos + offset), world) {
+            continue;
+        }
+        if !is_passable(&(pos + gap_offset), world) {
+            continue;
+        }
+        if !is_block_passable(&(pos + gap_offset).up(2), world) {
+            continue;
+        }
+        // make sure we actually have to jump
+        if is_block_solid(&(pos + gap_offset).down(1), world) {
+            continue;
+        }
+        // make sure it's not a headhitter
+        if !is_block_passable(&pos.up(2), world) {
+            continue;
+        }
+
+        let cost = *JUMP_ONE_BLOCK_COST + SPRINT_ONE_BLOCK_COST + SPRINT_ONE_BLOCK_COST;
+
+        edges.push(Edge {
+            movement: astar::Movement {
+                target: pos + offset,
+                data: MoveData {
+                    execute: &execute_parkour_move,
+                    is_reached: &default_is_reached,
+                },
+            },
+            cost,
+        })
+    }
+
+    edges
+}
+
+fn parkour_forward_2_move(world: &Instance, pos: BlockPos) -> Vec<Edge> {
+    let mut edges = Vec::new();
+    for dir in CardinalDirection::iter() {
+        let gap_1_offset = BlockPos::new(dir.x() * 1, 0, dir.z() * 1);
+        let gap_2_offset = BlockPos::new(dir.x() * 2, 0, dir.z() * 2);
+        let offset = BlockPos::new(dir.x() * 3, 0, dir.z() * 3);
+
+        if !is_standable(&(pos + offset), world) {
+            continue;
+        }
+        if !is_passable(&(pos + gap_1_offset), world) {
+            continue;
+        }
+        if !is_block_passable(&(pos + gap_1_offset).up(2), world) {
+            continue;
+        }
+        if !is_passable(&(pos + gap_2_offset), world) {
+            continue;
+        }
+        if !is_block_passable(&(pos + gap_2_offset).up(2), world) {
+            continue;
+        }
+        // make sure we actually have to jump
+        if is_block_solid(&(pos + gap_1_offset).down(1), world) {
+            continue;
+        }
+        // make sure it's not a headhitter
+        if !is_block_passable(&pos.up(2), world) {
+            continue;
+        }
+
+        let cost = *JUMP_ONE_BLOCK_COST
+            + SPRINT_ONE_BLOCK_COST
+            + SPRINT_ONE_BLOCK_COST
+            + SPRINT_ONE_BLOCK_COST;
+
+        edges.push(Edge {
+            movement: astar::Movement {
+                target: pos + offset,
+                data: MoveData {
+                    execute: &execute_parkour_move,
+                    is_reached: &default_is_reached,
+                },
+            },
+            cost,
+        })
+    }
+
+    edges
+}
+
+fn parkour_headhitter_forward_1_move(world: &Instance, pos: BlockPos) -> Vec<Edge> {
+    let mut edges = Vec::new();
+    for dir in CardinalDirection::iter() {
+        let gap_offset = BlockPos::new(dir.x() * 1, 0, dir.z() * 1);
+        let offset = BlockPos::new(dir.x() * 2, 0, dir.z() * 2);
+
+        if !is_standable(&(pos + offset), world) {
+            continue;
+        }
+        if !is_passable(&(pos + gap_offset), world) {
+            continue;
+        }
+        if !is_block_passable(&(pos + gap_offset).up(2), world) {
+            continue;
+        }
+        // make sure we actually have to jump
+        if is_block_solid(&(pos + gap_offset).down(1), world) {
+            continue;
+        }
+        // make sure it is a headhitter
+        if !is_block_solid(&pos.up(2), world) {
+            continue;
+        }
+
+        let cost = *JUMP_ONE_BLOCK_COST + WALK_ONE_BLOCK_COST + WALK_ONE_BLOCK_COST;
+
+        edges.push(Edge {
+            movement: astar::Movement {
+                target: pos + offset,
+                data: MoveData {
+                    execute: &execute_headhitter_parkour_move,
+                    is_reached: &default_is_reached,
+                },
+            },
+            cost,
+        })
+    }
+
+    edges
+}
+
+fn execute_parkour_move(
+    ExecuteCtx {
+        entity,
+        target,
+        start,
+        look_at_events,
+        sprint_events,
+        walk_events,
+        jump_events,
+        ..
+    }: ExecuteCtx,
+) {
+    let center = target.center();
+    look_at_events.send(LookAtEvent {
+        entity,
+        position: center,
+    });
+
+    let jump_distance = i32::max((target - start).x.abs(), (target - start).z.abs());
+
+    if jump_distance > 2 {
+        sprint_events.send(StartSprintEvent {
+            entity,
+            direction: SprintDirection::Forward,
+        });
+    } else {
+        walk_events.send(StartWalkEvent {
+            entity,
+            direction: WalkDirection::Forward,
+        });
+    }
+
+    jump_events.send(JumpEvent { entity });
+}
+
+fn execute_headhitter_parkour_move(
+    ExecuteCtx {
+        entity,
+        target,
+        start,
+        position,
+        look_at_events,
+        sprint_events,
+        walk_events,
+        jump_events,
+        ..
+    }: ExecuteCtx,
+) {
+    let center = target.center();
+    look_at_events.send(LookAtEvent {
+        entity,
+        position: center,
+    });
+
+    let jump_distance = i32::max((target - start).x.abs(), (target - start).z.abs());
+
+    if jump_distance > 2 {
+        sprint_events.send(StartSprintEvent {
+            entity,
+            direction: SprintDirection::Forward,
+        });
+    } else {
+        walk_events.send(StartWalkEvent {
+            entity,
+            direction: WalkDirection::Forward,
+        });
+    }
+
+    let start_center = start.center();
+    let distance_from_start = f64::max(
+        (start_center.x as f64 - position.x).abs(),
+        (start_center.z as f64 - position.z).abs(),
+    );
+
+    if distance_from_start > 0.75 {
+        jump_events.send(JumpEvent { entity });
+    }
+}